COLLABORATION AND LICENSE AGREEMENT

                                 BY AND BETWEEN

                               GLAXO GROUP LIMITED

                                       AND

                          NEUROCRINE BIOSCIENCES, INC.







                       COLLABORATION AND LICENSE AGREEMENT

THIS  COLLABORATION AND LICENSE AGREEMENT (this  "Agreement"),  dated as of July
20, 2001, is made by and between  Neurocrine  Biosciences,  Inc.,  10555 Science
Center Drive, San Diego, California, U.S.A. 92121 ("Neurocrine") and Glaxo Group
Limited, Glaxo Wellcome House, Berkeley Avenue, Greenford,  Middlesex,  England,
UK UB6 0NN ("GSK").

         WHEREAS,   GSK  is   engaged   in   the   research,   development   and
commercialization of human pharmaceutical products;

         WHEREAS,  Neurocrine is the owner or licensee of certain  patent rights
and know how relating to corticotropin releasing factor, its receptors and small
molecule  antagonists  thereto,  which  may  be  useful  in  the  discovery  and
development of human pharmaceutical products;

         WHEREAS,  GSK and Neurocrine have agreed to  collaborate,  on the terms
and   conditions   set  forth   herein,   in  the  research,   development   and
commercialization of CRF Antagonist Compounds (as defined below);

         NOW,  THEREFORE,   in  consideration  of  the  mutual  representations,
warranties  and  covenants   contained   herein  and  other  good  and  valuable
consideration, the Parties agree as follows:

                                   ARTICLE ONE

                                   DEFINITIONS

When used in this Agreement, each of the following terms shall have the meanings
set forth in this  Article One. Any terms  defined  elsewhere in this  Agreement
should be given equal weight and  importance as though set forth in this Article
One.

1.1      "AFFILIATE" shall mean a Person that,  directly or indirectly,  through
         one or more  intermediates,  controls,  is  controlled  by, or is under
         common  control  with the Person  specified.  For the  purposes of this
         definition, control shall mean the direct or indirect ownership of, (a)
         in the case of corporate entities,  securities  authorized to cast more
         than fifty  percent (50%) of the votes in any election for directors or
         (b) in the case of  non-corporate  entities,  more than  fifty  percent
         (50%)  ownership  interest with the power to direct the  management and
         policies of such non-corporate  entity.  Notwithstanding the foregoing,
         the term "Affiliate" shall not include subsidiaries in which a Party or
         its Affiliates  owns a majority of the ordinary voting power to elect a
         majority of the board of  directors,  but is  restricted  from electing
         such  majority  by  contract  or  otherwise,  until  such  time as such
         restrictions are no longer in effect.

1.2      "COLLABORATION  PRODUCTS" shall mean all CRF 1 Antagonist Compounds and
         CRF 2 Antagonist Compounds [***] or which are [***] with the [***].

1.3      "COLLABORATION  PATENT RIGHTS" shall mean the [***],  the [***] and the
         [***].



1.4      "COLLABORATION   TECHNOLOGY"   shall  mean  each  and  all   Technology
         encompassed by the [***] and specifically shall include the [***].

1.5      "COMBINATION  PRODUCT"  shall mean a product that  contains,  as active
         ingredients  one or more  Collaboration  Products and one or more other
         Compounds that are not Collaboration Products.

1.6      "COMMERCIALLY  REASONABLE  EFFORTS"  shall mean  efforts and  resources
         [***] in the [***] for a product  [***] in its [***] or [***] and is of
         [***]  taking into account  [***] the [***] of [***]  products in [***]
         the [***] and other  [***] of the  product,  the [***]  given the [***]
         involved,  the [***] of the product including the [***] of [***], [***]
         products and [***]. Commercially Reasonable Efforts shall be determined
         [***] basis for [***], and it is [***] of effort will [***], reflecting
         [***] of the Collaboration Product and the [***] involved.

1.7      "COMPOUND"  shall mean a [***] compound or substance  together with all
         complexes,  mixtures  and other  combinations,  prodrugs,  metabolites,
         enantiomers,  solid morphic forms, salt forms,  racemates,  and isomers
         thereof.

1.8      "CONFIDENTIAL  INFORMATION"  shall  mean with  respect  to each  Party,
         non-public  proprietary data or information which belong in whole or in
         part  to such  Party  and/or  information  designated  as  Confidential
         Information of such Party hereunder.

1.9      "CONTROLS" OR "CONTROLLED"  shall mean with respect to Technology,  the
         possession  of the  ability to grant  licenses or  sublicenses  without
         violating the terms of any agreement or other  arrangement with, or the
         rights of, any Third Party.

1.10     "CO-COMMERCIALIZE"  shall mean Neurocrine's  option to co-commercialize
         Collaboration Products in the U.S. as set forth in Section 6.3.

1.11     "CORTICOTROPIN  RELEASING FACTOR" shall mean [***] referred to as [***]
         as described in [***].

1.12     "CRF ANTAGONIST COMPOUND" shall mean a CRF 1 Antagonist Compound and/or
         CRF 2 Antagonist Compound, as the case may be.

1.13     "CRF 1 ANTAGONIST  COMPOUNDS"  shall mean compounds  encompassed by the
         Patent Rights relating to the  Collaboration  Technology that are [***]
         and [***]. For the avoidance of doubt, CRF 1 Antagonist Compounds shall
         include any [***].

1.14     "CRF 2 ANTAGONIST  COMPOUNDS"  shall mean compounds  encompassed by the
         Patent Rights relating to the  Collaboration  Technology that are [***]
         and [***]. For the avoidance of doubt, CRF 2 Antagonist Compounds shall
         include any [***].

1.15     "CRF 1 RECEPTOR" shall mean the transmembrane receptor claimed in [***]
         and  all   divisionals,   continuations   and   corresponding   foreign
         equivalents.

1.16     "CRF 2 RECEPTOR" shall mean the transmembrane receptor claimed in [***]
         and  all   divisionals,   continuations   and   corresponding   foreign
         equivalents, including [***].

1.17     "CRF RELATED  PURPOSES" shall mean purposes relating to the development
         of Compounds (i) that are [***] and (ii) for [***] in which [***].

1.18     "DEFAULT"   shall   mean  with   respect   to  a  Party  that  (i)  any
         representation  or warranty of such Party set forth  herein  shall have
         been untrue in any material  respect when made or (ii) such Party shall
         have  failed  to  perform  any  material  obligation  set forth in this
         Agreement.




1.19     "DEVELOP" shall mean those  activities  related to the pre-clinical and
         clinical   development  of  Collaboration   Products   including  those
         activities related to the obtainment of Governmental  Approvals for the
         clinical testing and commercial sale of Collaboration Products.

1.20     "DEVELOPMENT  PATENT  RIGHTS" shall mean Patent Rights arising from the
         Development  Program  after  expiration  of  the  term  of  exclusivity
         hereunder afforded by the Research Programs

1.21     "DEVELOPMENT PROGRAM" shall mean the development program(s) referred to
         in Section 5.3 (and  subject to its terms) to Develop CRF 1  Antagonist
         Compounds and CRF 2 Antagonist Compounds.

1.22     "EFFECTIVE DATE" shall mean the date first written above.

1.23     "FDA" shall mean the Federal Food and Drug Administration of the United
         States  Department of Health and Human Services or any successor agency
         thereof.

1.24     "FIELD OF USE" shall mean all [***].

1.25     "FIRST  COMMERCIAL  SALE" shall mean with respect to any  Collaboration
         Product  approved for  commercial  sale, the first transfer by GSK, its
         Affiliates  and/or its sublicensees of the  Collaboration  Product to a
         non-Affiliate  Third Party in exchange for cash or some  equivalent  to
         which value can be assigned.

1.26     "FORCE MAJEURE" shall mean any occurrence beyond the reasonable control
         of  a  Party  that  prevents  or  substantially   interferes  with  the
         performance by the Party of any of its obligations  hereunder,  if such
         occurs by reason of any act of God, flood, fire, explosion, earthquake,
         strike,   lockout,  labor  dispute,   casualty  or  accident;  or  war,
         revolution,  civil  commotion,  acts of  public  enemies,  blockage  or
         embargo;  or any  injunction,  law,  order,  proclamation,  regulation,
         ordinance,   demand  or   requirement  of  any  government  or  of  any
         subdivision,  authority or  representative  of any such government;  or
         breakdown  of plant,  inability  to  procure or use  materials,  labor,
         equipment,  transportation,  or energy sufficient to meet manufacturing
         needs  without  the  necessity  of  allocation;   or  any  other  cause
         whatsoever,  whether  similar or dissimilar to those above  enumerated,
         beyond the reasonable  control of such Party,  if and only if the Party
         affected shall have used  reasonable  efforts to avoid such  occurrence
         and to remedy it promptly if it shall have occurred.

1.27     "FTE"  shall  mean a full  time  equivalent  Neurocrine  employee  year
         consisting  of a minimum of a total of  approximately  [***]  hours per
         year of work on or directly related to the Research  Programs.  Work on
         or directly  related to the Research  Programs can include,  but is not
         limited to,  experimental  laboratory  work,  recording  and writing up
         results,  reviewing  literature  and  references,   holding  scientific
         discussions,  managing  and  leading  scientific  staff,  carrying  out
         management  duties  related to the  Research  Programs,  and writing up
         results for  publications or  presentation  and attending or presenting
         appropriate seminars and symposia.

1.28     "GENERIC  COMPETITION" shall exist during a given calendar quarter with
         respect  to a  Collaboration  Product  in a  country  if,  during  such
         calendar quarter, one or more [***] shall be [***] in such country.

1.29     "GENERIC  PRODUCTS"  shall mean and  include  [***]  (other  than [***]
         pursuant  to this  Agreement)  that  contain  [***] the same [***] as a
         [***] and which (a) [***] as a [***] and (b) can  [***]or are [***] for
         the [***].




1.30     "GSK  CONFIDENTIAL  INFORMATION"  shall mean  Confidential  Information
         owned by GSK and/or  its  Affiliates  or  otherwise  designated  as GSK
         Confidential   Information   hereunder  but  shall  not  include  Joint
         Confidential Information.

1.31     "GSK  MATERIALS"   shall  mean  GSK  proprietary   research   materials
         including,  but not limited to, assays,  physical databases of chemical
         structures of Compounds,  reagents and materials derived therefrom. GSK
         Materials will not include Program Materials or Collaboration Products.
         GSK will own GSK Materials supplied by GSK to Neurocrine hereunder.

1.32     "GSK  TECHNOLOGY"  shall mean, all Technology  and,  subject to Section
         1.48, (other than Program Technology) owned or Controlled by GSK and/or
         its  Affiliates on the Effective  Date [***] (i) [***] and [***] and/or
         [***]  and/or  (ii)  [***]  to the  [***]  of the  [***]  and/or  [***]
         including [***]. GSK Technology shall  specifically  include but not be
         limited to the GSK Patent Rights set forth on Exhibit A.

1.33     "INDICATION" shall have the meaning ascribed to it in Article 7.

1.34     "INVERSE  AGONIST" shall mean a drug which produces an effect  opposite
         to that of an agonist yet acts at the same receptor. A compound,  which
         binds to the CRF 1 Receptor or CRF 2 Receptor,  as the case may be, and
         in  the  absence  of  CRF  or  other  agonist   ligands,   will  reduce
         constitutive  activity.  Such compound will also reduce activity at the
         related CRF receptor in the presence of CRF or other  agonist  ligands.
         Such a compound will have [***].

1.35     "JOINT  CONFIDENTIAL  INFORMATION" shall mean Confidential  Information
         owned jointly by GSK and  Neurocrine  or otherwise  designated as Joint
         Confidential Information hereunder.

1.36     "LEAD COMPOUND" shall mean [***] or such other compound [***].

1.37     "MILESTONES"  shall mean the  payments to be made by GSK to  Neurocrine
         upon occurrence of certain events as set forth in Article Eight.

1.38     "MOOD  DISORDER(S)"  shall mean any one or more mood  disorders as such
         are more  particularly  specified  in  Sections A and B of Exhibit E to
         this Agreement.

1.39     "NDA"  shall  mean a New  Drug  Application  covering  a  Collaboration
         Product  filed  with the FDA  pursuant  to 21 CFR 314 or an  equivalent
         foreign  filing  required for  marketing  approval of a  pharmaceutical
         product.

1.40     "NET SALES" shall mean the [***] from sales of  Collaboration  Products
         in the Territory by GSK, its Affiliates or  sublicensees  ("the Selling
         Party") to Third  Parties  less [***] to  Collaboration  Product by the
         Selling Party using generally accepted accounting standards for:




         (i)      [***]  charges,   including  [***],  for  [***]  Collaboration
                  Product;

         (ii)     [***] and [***] paid or allowed by the  Selling  Party and any
                  other [***] imposed upon the [***] Collaboration Product;

         (iii)    [***] (including [***]) [***] on Collaboration Product;

         (iv)     [***] to customers on account of [***] Collaboration Product;

         (v)      [***] to customers on account of [***] Collaboration  Product;
                  and

         (vi)     Collaboration  Product [***] and  Collaboration  Product [***]
                  including those [***].

         Sales between GSK, its Affiliates and its or their  sublicensees  shall
         be excluded from the  computation  of Net Sales and no payments will be
         payable on such sales except where such Affiliates or  sub-distributors
         are end users but Net Sales shall include the subsequent final sales to
         Third Parties by such Affiliates or  sublicensees.  In the event that a
         Collaboration Product is sold in the form of a Combination Product, the
         Net Sales for such Combination Product will be calculated as follows:

                  (aa) If GSK, its  Affiliates  and/or  sublicensees  separately
         sells in such country, (x) each of the Collaboration Products contained
         in the Combination  Product and (y) other products  containing as their
         sole active  ingredient(s)  the other active component or components in
         such  Combination   Product,   the  Net  Sales   attributable  to  such
         Combination  Product  shall be  calculated  by  [***] is GSK's  (or its
         Affiliates or sublicensees,  as applicable)  [***] during the period to
         which the Net Sales calculation applies for each Collaboration  Product
         in the  Combination  Product in such country and [***] is GSK's (or its
         Affiliates or  sublicensees,  as applicable)  [***],  which  product(s)
         contain, [***] in the Combination Product.

                  (bb) If GSK, its  Affiliates  and/or  sublicensees  separately
         sells, in such country,  each  Collaboration  Products contained in the
         Combination Product but do not separately sell, in such country,  other
         products containing as their sole active ingredient(s) the other active
         component or  components  in such  Combination  Product,  the Net Sales
         attributable  to  such  Combination  Product  shall  be  calculated  by
         multiplying the Net Sales of such  Combination  Product by the fraction
         A/C  where:  A is [***],  and C is [***]  applies  for the  Combination
         Product in such country.

                  (cc)  If  GSK,  its  Affiliates  and/or  sublicensees  do  not
         separately   sell  each   Collaboration   Products   contained  in  the
         Combination  Product,  the Net Sales  attributable to such  Combination
         Product  shall  be  calculated  by  multiplying  the Net  Sales of such
         Combination Product by the fraction D/D+E where D is the [***] and E is
         the [***] Combination Product.

1.41     "NEUROCRINE   CONFIDENTIAL   INFORMATION"   shall   mean   Confidential
         Information  owned by Neurocrine or otherwise  designated as Neurocrine
         Confidential   Information   hereunder  but  shall  not  include  Joint
         Confidential Information.

1.42     "NEUROCRINE  MATERIALS"  shall  mean  Neurocrine  proprietary  research
         materials including,  but not limited to, assays, physical databases of
         chemical  structures  of  Compounds,  reagents  and  materials  derived
         therefrom.  Neurocrine  Materials will not include Program Materials or
         Collaboration  Products.   Neurocrine  will  own  Neurocrine  Materials
         supplied by Neurocrine to GSK hereunder.

1.43     "NEUROCRINE  RECEPTORS"  shall  mean  the  CRF  1  Receptor  and  CRF 2
         Receptor.

1.44     "NEUROCRINE  RECEPTOR  TECHNOLOGY"  shall mean,  all  Technology  (and,
         subject  to  Section  1.46,  other than  Program  Technology)  owned or
         Controlled by Neurocrine on the Effective Date or during the [***] that
         claims,  describes or relates to the use [***]  including  Neurocrine's
         [***].




1.45     "NEUROCRINE  TECHNOLOGY"  shall mean all Technology (other than Program
         Technology or Neurocrine  Receptor  Technology)  owned or Controlled by
         Neurocrine  on  the  Effective  Date  [***]  and/or  [***].  Neurocrine
         Technology  shall  specifically  include  but  not  be  limited  to the
         Neurocrine Patent Rights set forth on Exhibit B.

1.46     "NON-CRF  RELATED   PURPOSES"  shall  mean  purposes  relating  to  the
         development  of Compounds (i) that are [***] and (ii) are developed for
         [***].

1.47     "PARTY" shall mean GSK or Neurocrine, as the case may be, and "PARTIES"
         shall mean GSK and Neurocrine.

1.48     "PATENT  RIGHTS"  shall  mean the rights  and  interests  in and to all
         issued  patents  and  pending  patent   applications  in  any  country,
         including,    without   limitation,   all   provisional   applications,
         substitutions,  continuations,  continuations-in-part,  divisions,  and
         renewals,    all   letters    patent   granted    thereon,    and   all
         patents-of-addition,   reissues,   reexaminations   and  extensions  or
         restorations by existing or future extension or restoration mechanisms,
         including,  without limitation Supplementary Protection Certificates or
         the equivalent thereof.

1.49     "PERSON" shall mean any  individual,  firm,  corporation,  partnership,
         limited liability company, trust,  unincorporated organization or other
         entity or a government  agency or political  subdivision  thereto,  and
         shall include any successor by merger or otherwise) of such Person.

1.50     "PROGRAM MATERIALS" shall mean and include clones, cell lines,  assays,
         databases,  electronic and physical  databases of chemical  structures,
         which, in each case, are developed, by Neurocrine and/or GSK during the
         course of conduct of the Research Programs.  Program Materials will not
         include Collaboration Products.

1.51     "PROGRAM  PATENT RIGHTS" shall mean the Patent Rights arising from this
         collaboration  between the Parties during the period  commencing on the
         Effective  Date and ending upon  expiration of the term of  exclusivity
         afforded by the Research Programs (which such Program Patent Rights are
         jointly  owned by the Parties)  "Program  Patent  Rights" shall include
         Patent Rights [***]  arising from [***] where it is determined  that in
         respect  of [***]  included  in such  application  there are [***] as a
         result of [***] during and arising from [***].

1.52     "PROGRAM  TECHNOLOGY"  shall mean  Technology,  which is  discovered or
         invented by Neurocrine  personnel and/or GSK personnel and/or personnel
         within their  respective  Affiliates  arising  from this  collaboration
         between the Parties during the period  commencing [***] and ending upon
         [***] (which such Program  Technology  is jointly owned by the Parties)
         and specifically shall include Program Patent Rights.

1.53     "R&D  PROGRAMS"  shall  mean  the CRF 1 R&D  Program  and the CRF 2 R&D
         Program described in Article Five.

1.54     "REGULATORY APPROVAL" shall mean the technical,  medical and scientific
         licenses,  registrations,   authorizations  and  approvals  (including,
         without limitation, approvals of Investigational Drug Applications, New
         Drug Applications and equivalents, supplements and amendments, pre- and
         post- approvals,  pricing and third party reimbursement  approvals, and
         labeling approvals) of any national, supra-national, regional, state or
         local regulatory agency,  department,  bureau,  commission,  council or
         other governmental entity, necessary for the development,  manufacture,
         distribution, marketing, promotion, offer for sale, use, import, export
         or sale of Collaboration Product(s) in a regulatory jurisdiction




1.55     "REGULATORY FILINGS" shall mean, collectively, Investigational New Drug
         Applications,  Product License  Applications,  Drug Master Files,  NDAs
         and/or any other equivalent or comparable filings as may be required by
         Regulatory Authorities to obtain Regulatory Approvals.

1.56     RESEARCH  PLANS"  shall  mean  the CRF 1  research  plan  and the CRF 2
         research plan as described in Section 5.2 (c).

1.57     "RESEARCH PROGRAMS" shall mean the CRF 1 collaborative research program
         conducted by Neurocrine  and GSK in accordance  with the  provisions of
         Article  Five  hereof  and the  CRF 2  collaborative  research  program
         conducted by Neurocrine  and GSK in accordance  with the  provisions of
         Article Five hereof.

1.58     "ROYALTIES"  shall mean those  royalties  payable by GSK to  Neurocrine
         pursuant to Article Seven of this Agreement.

1.59     "[***]"  shall mean the  License  Agreement  dated [***] by and between
         [***] and Neurocrine Biosciences, Inc.

1.60     "STEERING  COMMITTEE"  shall have the meaning set forth in Article Four
         hereof.

1.61     "TECHNOLOGY"   shall  mean  proprietary   data,   information  and  all
         intellectual  property,  including  but not limited to, trade  secrets,
         know-how,  inventions and  technology,  whether  patentable or not, and
         Patent  Rights  directed to products,  processes,  formulations  and/or
         methods but which term shall  specifically  exclude  copyright  and all
         registered and unregistered trademarks.

1.62     "TERRITORY" shall mean the world.

1.63     "THIRD PARTY(IES)" shall mean any Person other than Neurocrine, GSK and
         their respective Affiliates.

1.64     "THIRD PARTY  ROYALTIES"  shall mean  royalties  payable by Neurocrine,
         GSK, its Affiliates or sublicensees to a non-Affiliate  Third Party (or
         multiple  non-Affiliate  Third Parties) to make,  have made, use, sell,
         offer  for sale or import  Collaboration  Products  where  the  royalty
         payable to such non-Affiliate Third Party [***].

1.65     "VALID CLAIM" shall mean a claim of an issued and unexpired patent or a
         claim of a pending patent  application  which has not been held invalid
         or  unenforceable  by a court or other  government  agency of competent
         jurisdiction  from which no appeal can be or has been taken and has not
         been admitted to be invalid or unenforceable through  re-examination or
         disclaimer or otherwise.

                                   ARTICLE TWO

                         REPRESENTATIONS AND WARRANTIES

2.1      MUTUAL  REPRESENTATIONS  AND WARRANTIES.  Each Party hereby represents,
         warrants and covenants to the other Party that:




         (a)      the execution,  delivery to the other Party and performance by
                  it of this  Agreement  and its  compliance  with the terms and
                  provisions of this  Agreement  does not and will not conflict,
                  in any material respect,  with or result in a breach of any of
                  the  terms  or  provisions   of  (i)  any  other   contractual
                  obligations of such Party, (ii) the provisions of its charter,
                  operating  documents  or  bylaws,  or (iii) any  order,  writ,
                  injunction  or decree of any court or  governmental  authority
                  entered  against it or by which it or any of its  property  is
                  bound  except   where  such  breach  or  conflict   would  not
                  materially  impact the Party's ability to meet its obligations
                  hereunder,

         (b)      this  Agreement is a legal and valid  obligation  binding upon
                  such  Party and  enforceable  in  accordance  with its  terms,
                  including  Section 10.4, except as (i)  enforceability  may be
                  limited by bankruptcy, insolvency, reorganization, moratorium,
                  or similar laws affecting the enforcement of creditors' rights
                  and (ii) equitable principles of general applicability;

         (c)      such Party is a corporation  duly organized,  validly existing
                  and in good  standing  under  the  laws of the  state or other
                  jurisdiction  of  incorporation  or  formation  and  has  full
                  corporate power and authority to enter into this Agreement and
                  to carry out the provisions  hereof except where failure to be
                  in good  standing  would not  materially  impact  the  Party's
                  ability to meet its obligations hereunder;

         (d)      such  Party is duly  authorized,  by all  requisite  corporate
                  action,   to  execute  and  deliver  this  Agreement  and  the
                  execution,  delivery and performance of this Agreement by such
                  Party does not require any shareholder action or approval, and
                  the Person executing this Agreement on behalf of such Party is
                  duly authorized to so by all requisite corporate action; and

         (e)      no  consent,   approval,   order  or   authorization   of,  or
                  registration,   qualification,   designation,  declaration  or
                  filing  with,  any  federal,   state  or  local   governmental
                  authority is required on the part of such Party in  connection
                  with the valid  execution,  delivery and  performance  of this
                  Agreement,   except  for  any  filings  under  any  applicable
                  securities and anti-trust  laws  (including but not limited to
                  any Hart-Scott-Rodino Act filing) and except where the failure
                  to  obtain  any of the  foregoing  would  not have a  material
                  adverse  impact  on the  ability  of such  Party to meets  its
                  obligations hereunder.

2.2      USE OF  TECHNOLOGY.  Neurocrine  warrants  that it will not use the GSK
         Technology unless specifically licensed hereunder. GSK warrants that it
         will not use the Neurocrine  Technology  unless  specifically  licensed
         hereunder.

2.3      [***].  Patent  Rights  licensed  to [***]  pursuant  to the [***] (the
         "Sublicensed  Rights")  are  included  in the [***]  licensed to [***].
         [***] has reviewed and  understands  the terms of the [***] and, so far
         as  it  is  aware,  understands  the  terms  of  this  Agreement  to be
         consistent  with it. [***] agrees that it will not [***] insofar as any
         such [***] will have any [***] on any of the [***] under this Agreement
         or any agreement  entered into between [***],  without [***] (i) may be
         provided or withheld by [***] in the case of any [***] that would [***]
         any such [***] or [***] of [***],  including,  without limitation,  any
         [***] to be [***],  any [***] in [***], or any [***] of the Sublicensed
         Rights, or (ii) will not be unreasonably  withheld by [***] in the case
         of any [***] that would [***] impact any such [***] further agrees that
         it will  promptly  provide [***] with copies of any notices it receives
         from or gives to [***] pertaining to any [***] of the [***].

2.4      SPECIFIC  NEUROCRINE  WARRANTIES  Neurocrine warrants and represents to
         GSK that as of the mutual date of  execution  of this  Agreement by the
         Parties:




         (a)      it has the full  right,  power  and  authority  to  grant  the
                  licenses granted to GSK under Article Three hereof;

         (b)      all Patent Rights  included  within the Neurocrine  Technology
                  are  existing  and,  to its  knowledge,  are  not  invalid  or
                  unenforceable, in whole or in part;

         (c)      (i)  it is the  sole  and  exclusive  owner  or the  exclusive
                  licensee  of the  Neurocrine  Technology,  including,  without
                  limitation,  all Patent Rights included therein,  and (ii), to
                  its knowledge,  no Person has any right,  title or interest in
                  or to the Neurocrine Technology;

         (d)      all inventors  (who are known as of the date this Agreement is
                  signed  by each of the  Parties)  of any  inventions  included
                  within the  Neurocrine  Technology  have assigned their entire
                  right,  title and interest in and to such  inventions  and the
                  corresponding Patent Rights to Neurocrine;

         (e)      there are no claims,  judgments or settlements against or owed
                  by  Neurocrine  or, to its  knowledge,  pending or  threatened
                  claims or litigation relating to the Neurocrine Technology;

         (f)      except  as  disclosed  to GSK  prior  to the  mutual  date  of
                  execution of this Agreement by the Parties, it is not aware of
                  any [***] which could materially  adversely affect the ability
                  of [***]  hereunder  or the  ability of [***] of the rights or
                  licenses granted to it under this Agreement;

         (g)      it has no knowledge of any  material  information,  other than
                  information  provided  to GSK  prior  to the  signing  of this
                  Agreement, which would [***]; and

         (h)      it has no  present  knowledge  of the  existence  of any [***]
                  which it has not provided to GSK prior to mutual  execution by
                  the  Parties of this  Agreement  and which in [***] that there
                  may exist [***]

2.5      [***]  COLLABORATIVE  EFFORT.  Subject  to  [***]  sublicensing  rights
         hereunder,  and except where the  Steering  Committee  shall  determine
         otherwise (in which event for the avoidance of doubt such work shall be
         considered part of this collaboration), [***] will each work [***]; and
         (ii) otherwise in contravention of the exclusive license rights granted
         to [***] under [***] of this  Agreement.  For the  avoidance  of doubt,
         upon expiration of the term of the Research Program:

         (a)      this Agreement shall remain in force and effect;

         (b)      the  intent  and effect of the  license  grant to [***]  under
                  Section 3.1 is that, for the duration of this Agreement, [***]
                  shall have [***] or through any Affiliate  and/or Third Party,
                  and/or  otherwise  [***]  including  [***]  and/or  the  [***]
                  including [***].

2.6      COMMERCIALLY  REASONABLE  EFFORTS.  Neurocrine  and GSK shall  each use
         Commercially Reasonable Efforts to perform their respective obligations
         under  the R&D  Programs  and meet the  goals of the R&D  Programs  and
         Collaboration.




2.7      DISCLAIMER.  EXCEPT AS  EXPRESSLY  PROVIDED  HEREIN EACH PARTY MAKES NO
         OTHER REPRESENTATION OR WARRANTY, EITHER EXPRESS OR IMPLIED, INCLUDING,
         WITHOUT LIMITATION,  ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
         PARTICULAR  PURPOSE WITH RESPECT TO ANY  MATERIALS,  INCLUDING  WITHOUT
         LIMITATION    NEUROCRINE    TECHNOLOGY   AND   NEUROCRINE    RECEPTORS.
         ADDITIONALLY,  EXCEPT AS EXPRESSLY SET FORTH IN SECTION 2.4, NEUROCRINE
         MAKES NO  REPRESENTATION OR WARRANTY,  EITHER EXPRESS OR IMPLIED,  THAT
         THE  MANUFACTURE,  USE OR SALE OF ANY  COLLABORATION  PRODUCT  WILL NOT
         INFRINGE THE INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY.

                                  ARTICLE THREE

                                    LICENSES

3.1      LICENSE GRANT TO [***].  [***] hereby grants to [***]:

         (a)      the [***] right and license, [***] sublicense [***], under the
                  [***]  Technology,  including  [***] Patent Rights,  and [***]
                  interest in any Program [***],  including [***] Patent Rights,
                  to identify,  make, have made, use, sell, offer for sale, have
                  sold and import Collaboration  Products in the Field of use in
                  the Territory;

         (b)      during  the term of [***] and a period of [***],  the [***] in
                  the Territory,  with [***] sublicense  [***],  under the [***]
                  Technology, to use the [***] for [***].

3.2      [***] RIGHTS.  The exclusive  licenses  granted to [***] in Section 3.1
         above, and the provisions of Section 3.7, shall be subject to the [***]
         of a [***], with [***], in each case, to the extent necessary for [***]
         to solely  perform  its  obligations  [***].  Subject  to the  licenses
         granted to [***] in Section 3.1 above,  nothing  herein shall be deemed
         to  restrict  [***]  right to  otherwise  exploit (i) the [***] for all
         purposes,  subject always to Section 2.5 [***];  and (ii) the [***] for
         [***].

3.3      LICENSE  GRANT TO [***].  [***] hereby  grants to [***] under the [***]
         Technology,  including  [***]  Patent  Rights,  and  [***]  Technology,
         including [***], to [***] and any other [***] conducted under the scope
         and authority of this Agreement.

3.4      DISCLOSURE.  During the term of this  Agreement,  the  Parties  will as
         promptly  as  practicably  possible  disclose  to one another all data,
         information, inventions, techniques and discoveries (whether patentable
         or  not)  arising  out of the  conduct  of the  R&D  Programs  and  all
         inventions,  techniques  and  discoveries  (whether  patentable or not)
         included in the Technology licensed hereunder.

3.5      DATA. All data and information  arising out of the R&D Programs will be
         jointly owned by the Parties and will be Joint Confidential Information
         and,  subject to the licenses granted by one Party to the other, as set
         forth herein, may be used by the Parties for any purpose.

3.6      MATERIALS.

         (a)      PROGRAM  MATERIALS.  During the term of this  Agreement,  upon
                  request by either Party, the Party to whom the request is made
                  will  promptly  provide to the other Party such  quantities of
                  Program  Materials as shall be reasonably  available in excess
                  of its own  needs  for  such  other  Party  to  carry  out its
                  respective  responsibilities under this Agreement.  Subject to
                  the  licenses set forth in Article  Three,  each Party may use
                  the Program  Materials  created or developed by such Party for
                  any purpose.




         (b)      NEUROCRINE  MATERIALS.  During  the  term of  this  Agreement,
                  Neurocrine will supply to GSK Neurocrine  Materials reasonably
                  both in quantity and identity)  requested by GSK provided (i)
                  such Neurocrine Materials are reasonably and readily available
                  to Neurocrine in excess of Neurocrine's own requirements,  and
                  (ii)  supply  of  such  Neurocrine   Materials  will  not,  in
                  Neurocrine's  sole  judgment,  (a) conflict with  Neurocrine's
                  internal or collaborative research programs, (b) conflict with
                  Neurocrine's internal policies regarding such materials or (c)
                  violate any  agreement  to which  Neurocrine  is a party.  Any
                  Neurocrine  Materials  provided to GSK hereunder together with
                  materials  derived  therefrom  thereof (i) may only be used by
                  GSK and GSK's permitted sublicensees in the conduct of the R&D
                  Programs  and/or  in  the  discovery  and/or   development  of
                  Collaboration  Products,  (ii)  may not be  supplied  to Third
                  Parties,  other than Third Parties that,  with the approval of
                  the Steering  Committee,  are under  contract  with one of the
                  Parties to perform  services  in support of the R&D  Programs,
                  without  Neurocrine's  prior  written  consent  which  can  be
                  withheld for any reason in  Neurocrine's  sole  discretion and
                  (iii) will, at Neurocrine's option and at Neurocrine's request
                  be returned to  Neurocrine  or  destroyed.  The  provision  of
                  Neurocrine  Materials hereunder will not constitute any grant,
                  option or license under any Neurocrine  Patent Rights,  except
                  as expressly set forth herein.

         (c)      GSK  MATERIALS.  During the term of this  Agreement,  GSK will
                  supply  to  Neurocrine  GSK  Materials   reasonably  both  in
                  quantity and identity) requested by Neurocrine pursuant to the
                  carrying out of its  obligations  under the  Research  Program
                  provided (i) such GSK  Materials  are  reasonably  and readily
                  available to GSK in excess of GSK's own requirements, and (ii)
                  supply of such GSK Materials will not, in GSK's sole judgment,
                  (a) conflict  with GSK's  internal or  collaborative  research
                  programs,  (b) conflict with GSK's internal policies regarding
                  such  materials or (c) violate any agreement to which GSK is a
                  party.  Any GSK  Materials  provided to  Neurocrine  hereunder
                  together with materials derived therefrom thereof (i) may only
                  be used by Neurocrine in the conduct of the R&D Programs, (ii)
                  may not be supplied to Third Parties, other than Third Parties
                  that, with the approval of the Steering  Committee,  are under
                  contract  with  one of the  Parties  to  perform  services  in
                  support  of the R&D  Programs,  without  GSK's  prior  written
                  consent  which can be  withheld  for any  reason in GSK's sole
                  discretion  and  (iii)  will,  at  GSK's  option  and at GSK's
                  request be returned to GSK or destroyed.  The provision of GSK
                  Materials  hereunder will not constitute any grant,  option or
                  license under any GSK Patent  Rights,  except as expressly set
                  forth herein.

3.7      OPTION FOR [***].

         (a)      OPTION  FOR  [***].  The  scope of the  Collaboration  between
                  Neurocrine and GSK set forth in this Agreement  [***] research
                  and  development  of  compounds  that are [***].  The  Parties
                  acknowledge that the [***]  Technology may have [***].  Whilst
                  [***] the full and  unrestricted  right to use and exploit the
                  [***] Technology for purposes  [***]and  specifically to [***]
                  Purposes, the exercise of such rights is, and shall be, at all
                  times subject to the terms of Section 3.7 (b) in that, subject
                  to such  terms,  either  Party shall have the option to obtain
                  [***] license [***] under the [***]  Technology to make,  have
                  made,  use,  sell,  have sold and import  [***]  Purposes in a
                  particular field.

         (b)      EXERCISE  OF THE OPTION.  In order to exercise  the option for
                  [***]  Technology as referred to in Section 3.7(a),  the [***]
                  must deliver to [***] in writing,  (i) a description  of [***]
                  of the [***]  Technology  with respect to which [***],  (ii) a
                  representation  by such Party that [***] has  conducted  [***]
                  which indicates that the portion of the [***]  Technology with
                  respect to which [***] in the field [***] (which shall include
                  [***]  etc.) and bears a  reasonable  relation  to the  [***],
                  (iii) a  description  of the [***] for which [***] which shall
                  be  limited  to a specific  statement  of the [***]  including
                  [***] (for example, [***] shall not be considered sufficiently
                  specific  while a  statement  of  [***]  shall  be  considered
                  sufficiently  specific),  (iv) a description  of the [***] and
                  known and potential [***],  and (v) a  representation  by such



                  Party  that the  Party  [***]  consistent  with  such  Party's
                  practices  with  regard  [***].  Upon  the  [***]  good  faith
                  determination  that an appropriate  demonstration  to [***] of
                  (i)-(v) above has been made by the requesting Party, the other
                  Party  shall  [***]  right  and  license   [***]  under  [***]
                  Technology  with respect to which [***] for such [***] Purpose
                  [***] and the requesting  Party shall [***] in respect of same
                  for so long as [***] Technology for such [***] Purpose in such
                  particular  [***].  For the  avoidance  of doubt [***] of this
                  Agreement for any reason.


3.8      INVENTION  ASSIGNMENT  AGREEMENTS.  All  Neurocrine  and GSK  personnel
         conducting the R&D Programs will have executed  Neurocrine's  or GSK's,
         as the case may be, standard  non-disclosure  and invention  assignment
         agreement.


                                  ARTICLE FOUR

                               STEERING COMMITTEE

4.1      CREATION;  AUTHORITY.  Within  sixty (60) days of the  Effective  Date,
         Neurocrine  and GSK will  form a  Steering  Committee  to  oversee  the
         research,  development and commercialization of Collaboration  Products
         by  reviewing  all  recommendations  and  issues  arising  from the R&D
         Program and Project  Teams,  who shall be  responsible  to the Steering
         Committee. The Steering Committee shall be comprised of an equal number
         (maximum four (4) per party) of representatives appointed by Neurocrine
         and GSK. GSK  representatives  on the Steering  Committee will be at VP
         level  and  will  include  representatives  who  can  address  all  the
         potential  Indications  for  Collaboration  Products  arising  from the
         Collaboration.

4.2      SECRETARY.  A secretary to the Steering Committee shall be appointed on
         an annual basis and will rotate  between GSK and  Neurocrine,  with GSK
         providing the first such secretary.  The secretary shall be responsible
         for scheduling  quarterly meetings,  distributing  meeting materials in
         advance  of  meetings  and  meeting  minutes  following  meetings.  The
         secretary  shall also be empowered to call special  meetings on request
         of any Steering Committee member. The Party convening a special meeting
         shall send notices and agenda for such  meetings to the other Party and
         to each Steering Committee member.

4.3      MEETINGS.  The Steering  Committee  shall meet no less  frequently than
         quarterly.  Steering  Committee meetings may be by teleconference or by
         videoconference  as well as in person,  with at least one  face-to-face
         meeting  per  annum.  Either  Party may call a special  meeting  of the
         Steering Committee two (2) times per year, on fifteen (15) days written
         notice to the other Party.  Meetings will alternate between the offices
         of the Parties, unless otherwise agreed. Each Party shall have one vote
         only.  Members of the Committee  shall have the right to participate in
         meetings by  telephone.  Each Party shall be  responsible  for expenses
         incurred by its  employees  and its members of the  Steering  Committee
         incurred in attending or otherwise  participating in Steering Committee
         meetings.

4.4      DECISIONS OF THE  COMMITTEE.  All  decisions of the Steering  Committee
         shall be made in good faith in the best interests of the  Collaboration
         to further the goals of the  Collaboration  and shall be unanimous.  In
         the event the Steering Committee shall be unable to reach a decision on
         any matter, the matter shall be submitted to the [***] Neurocrine [***]
         of GSK for [***] based on [***] and if they can not agree  within [***]
         of the matter having been referred to them [***].

4.5      REPORTING AND DISCLOSURE.

         (a)      REPORTS.  Prior  to each  quarterly  meeting  of the  Steering
                  Committee,  the Parties will  distribute to each other written
                  copies  of  all  materials  intended  to be  submitted  at the
                  Steering  Committee  meeting plus, to the extent not set forth
                  in the Steering Committee materials, a written report from the
                  CRF  Research  Project  Team and,  where  applicable,  the CRF
                  Development  Project Team(s) both more particularly  referred
                  to in  Article  5)  summarizing  any other  material  data and




                  information  arising out of the conduct of the R&D Program. In
                  the event that after receipt of any such report,  either Party
                  shall request  additional data or information  relating to the
                  R&D Program data or Technology licensed  hereunder,  the Party
                  to whom such  request  is made shall  promptly  provide to the
                  other  Party  such  data  or   information   that  such  Party
                  reasonably  believes is necessary for the continued conduct of
                  the R&D Program.

         (b)      MEETINGS.  At the meetings of the Steering Committee,  GSK and
                  Neurocrine  will review in reasonable  detail (i) all data and
                  information  generated  in the conduct of the R&D  Programs by
                  each Party and (ii) all Program Technology  licensed hereunder
                  developed by the Parties.

4.6      GOALS OF THE COLLABORATION.  The goals of the Collaboration,  expressed
         herein as an intent  (rather  than  creating  any  express  or  implied
         liability on the part of either Party) shall be:

         (a) to establish [***] for [***];

         (b)      to establish [***] for [***];

         (c)      to identify [***] to the [***];

         (d)      to identify [***] to the [***];

         (e)      to identify [***]; and

         (f)      to [***] for all  [***] in this  context  shall  have the same
                  meaning as in Section [***].


                                  ARTICLE FIVE

                                 CRF R&D PROGRAM

5.1      CRF R&D PROGRAM.  Under the terms and conditions set forth herein,  GSK
         and  Neurocrine  will  collaborate  in the  conduct of a  collaborative
         research and development program to [***] (the "CRF R&D Program").  The
         CRF R&D Program will be comprised of two (2) main  components:  the CRF
         Research Program and the CRF Development Program.

5.2      CRF RESEARCH PROGRAM.

         (a)      TERM.  The initial  term of the CRF  Research  Program will be
                  [***] from the Effective Date,  extendable by a further [***],
                  to [***] from the Effective Date, upon the mutual agreement of
                  both Parties.  To give effect to the  foregoing,  on or around
                  [***] before  expiration  of the initial [***] term of the CRF
                  Research Program, the Parties shall meet to consider and agree
                  upon  the  appropriateness,  or not,  of  extending  such  CRF
                  Research  Program for a further  [***].  If the Parties do not
                  agree  mutually  to  extend  the CRF  Research  Program  for a
                  further [***] in accordance with the foregoing provisions, GSK
                  and Neurocrine shall  nevertheless  continue into [***] of the
                  CRF Research Program to allow for an orderly winding down, and
                  transition,  of  activities  carried  out during  the  initial
                  [***].

         (b)      GOALS.

                  (i)      [***]  Antagonist  Compounds.  The  goal  of the  CRF
                           Research  Program as such relates to  [***]Antagonist
                           Compounds, will be to [***] and [***] to the [***] as
                           Development Compounds for [***] and [***] other [***]
                           and  to  identify  [***]  for  future   research  and
                           development.  It is expected that the [***] for [***]
                           Receptor  Antagonists  will be  [***]  and  [***]  or
                           another  [***] for which the  therapeutic  benefit is
                           not directly  related to [***].  It is a further goal
                           of the CRF Research  Program to continue  basic [***]




                           biology  research  including  development  of  [***],
                           [***] and [***] to further  study  [***] of the [***]
                           and to explore  [***] as it  relates  to  development
                           [***]. (ii)  [***]Antagonist  Compounds.  The goal of
                           the CRF  Research  Program,  as such relates to [***]
                           Antagonist  Compounds,  will be to [***] for [***] to
                           evaluate  [***] and [***] and to identify  [***] that
                           can be optimized for [***].

                  For the purposes of this Agreement,  the following terms shall
         have the meanings assigned below:

                  "Development Compound" shall mean a Collaboration Product with
         respect to which [***].


                  "Back-up  Compound"  shall  mean a  series  of one (1) or more
         Compounds  that are  included  within the [***] and that may exhibit an
         improved pharmacokinetic profile with an acceptable safety profile.

                  "Follow-On  Compound"  shall  mean a series of one (1) or more
         Compounds   that   belong  to  [***]  and  that   exhibit  an  improved
         pharmacokinetic profile and an acceptable safety profile.

                  "Second  Generation  Compound"  shall mean Compounds that when
         compared  to the [***]  interact  with a [***] and which have  distinct
         pharmacophore properties and improved profile with an acceptable safety
         profile.

         (c)      CRF RESEARCH  PLAN.  The initial  [***] CRF  research  plan is
                  attached hereto as Exhibit C and such plan also incorporates a
                  detailed  research plan for the first year of the CRF Research
                  Program.  The [***] plan will be updated on an annual basis by
                  the CRF Research  Project Team and will  specifically  include
                  detailed  plans  for the  following  year  including  staffing
                  levels and  activities  as well as a more general plan for the
                  remaining  term of the  program.  Each  annual  plan  shall be
                  prepared  jointly  by the  Parties  through  the CRF  Research
                  Project  Team and  submitted  to the  Steering  Committee  for
                  review  and  approval.  The  CRF  Research  Plan  may  only be
                  modified or amended upon the written  approval of the Steering
                  Committee.  If the Parties agree, pursuant to Section 5.2 (a),
                  to extend the initial  [***] term of the CRF Research  Program
                  by a further  [***],  to [***] from the  Effective  Date,  the
                  Parties shall as soon as practicably  thereafter,  through the
                  CRF Research Project Team, commence the drafting of a suitable
                  supplement  to the then  existing CRF Research Plan which such
                  supplement  the CRF  Research  Project Team shall then use all
                  reasonable  endeavors to have  submitted  to, and approved by,
                  the Steering Committee, in writing, before the commencement of
                  such  further  period of [***].  Such newly  supplemented  CRF
                  Research  Plan will then also be updated  by the CRF  Research
                  Project  Team on an annual basis for the  remaining  period of
                  [***] and will  specifically  include  detailed  plans for the
                  following  year  including  staffing  levels,  activities  and
                  estimated  expenditures  as well as more  general plan for the
                  remaining term of the program.  Such annual plan shall also be
                  prepared   jointly  by  the  CRF  Research  Project  Team  and
                  submitted to the Steering  Committee  for review and approval.
                  If the  Parties  have not  mutually  agreed to extend  the CRF
                  Research Program for a further [***] and,  pursuant to Section
                  5.2 (a), the Parties continue into a [***] of the CRF Research
                  Program (to allow for the orderly  winding down and transition
                  of  activities  carried  out during the  [***]),  the  Parties
                  shall, as soon as practicable after determining such course of
                  action, and through the CRF Research Project Team, set out the
                  terms of such [***] program of research before submitting such
                  [***] plan to, and for  approval  by, the  Steering  Committee
                  before the commencement of [***].




         (d)      FUNDING OF THE RESEARCH PROGRAM.

                  (i)      Internal Costs.  [***] shall fund [***] costs arising
                           out  of the  conduct  of the  CRF  Research  Program,
                           provided   however  that  Neurocrine   shall  not  be
                           obligated   to  devote  more  than  [***]  full  time
                           equivalent   Neurocrine   personnel  ("FTE")  to  the
                           conduct  of the CRF  Research  Program  in [***]  and
                           [***] FTEs in [***]  (provided  that the Parties have
                           mutually  agreed to extend the CRF  Research  Program
                           for a [***] as  contemplated  by Section  5.2 (a) and
                           not for the  avoidance  of  doubt  where  such  [***]
                           activity  relates  to the  orderly  winding  down and
                           transition of activities carried out during the [***]
                           as also  contemplated  by  Section  5.2 (a)).  In the
                           event the Steering  Committee  shall elect to request
                           that Neurocrine  devote more than the above number of
                           FTEs to the  conduct of the CRF  Research  Program in
                           any year,  GSK will  provide  such  funding  for each
                           additional  Neurocrine FTE at a rate of [***] per FTE
                           per year.

                  (ii)     External   and  Third  Party   Costs.   GSK  will  be
                           responsible  for all GSK and  Neurocrine  Third Party
                           and  external  costs  and  expenses  approved  by the
                           Steering  Committee.  Third Party contractors will be
                           used whenever  GSK's and/or  Neurocrine's  internally
                           dedicated FTEs are insufficient to meet the timelines
                           established  by the Steering  Committee or when Third
                           Party  contractors  will  best  meet the goals of the
                           Collaboration.   In  some  instances,   the  Steering
                           Committee may elect to request that Neurocrine act as
                           a Third Party  contractor to the CRF Research Program
                           and in such  event,  Neurocrine  will be  compensated
                           accordingly by GSK as agreed  between  Neurocrine and
                           the Steering Committee.

5.3      CRF DEVELOPMENT PROGRAM.

         (a)      GOAL.  The goal of the  Development  Program  as it relates to
                  [***]  Antagonist  Compounds  will be to [***]  for  [***] and
                  [***] plus other [***] for like or different  [***]. It is the
                  ultimate goal of the CRF  Development  Program as such relates
                  to [***],  although no obligation  and/or  liability is hereby
                  created or implied, to [***] on a Collaboration Product for at
                  least [***] by [***].  The goal of the Development  Program as
                  it relates to [***]  Antagonist  Compounds  shall be [***] and
                  reflected  at the  time  the  [***]  to  incorporate  detailed
                  reference to the  development  of [***]  Antagonist  Compounds
                  pursuant to Section 5.3(b).

         (b)      CRF  DEVELOPMENT  PLAN.  The CRF  Development  Program will be
                  conducted in accordance with the CRF Development Plan attached
                  hereto as Exhibit D. The CRF Development  Plan will be updated
                  by each of the CRF  Development  Project  Teams at least on an
                  annual  basis.  Where a plan  for a  particular  Collaboration
                  Product  does not  already  form  part of the CRF  Development
                  Plan,  the relevant CRF  Development  Project Team shall draft
                  such plan for the particular  Collaboration  Product for which
                  it has responsibility,  with a view to same being incorporated
                  into  and  forming  part of the CRF  Development  Plan In both
                  cases,  such updates and/or amendments shall be submitted each
                  time  by the  relevant  CRF  Development  Project  Team to the
                  Steering  Committee  for  review  and  approval.   As  of  the
                  Effective  Date, the CRF  Development  Plan attached hereto as
                  Exhibit D [***].

         (c)      CONDUCT AND FUNDING.  GSK will be responsible  for the conduct
                  and  funding  of all  aspects of the CRF  Development  Program
                  which will include; scale-up, GLP toxicology,  GSK's preferred
                  animal  models and any other  analyses or models  requested by
                  GSK, GMP  manufacturing,  and clinical  development  including
                  regulatory affairs matters relating to same. In addition,  GSK
                  will fund the  completion  of all  Transition  Activities  for
                  [***].   For  the  purposes  of  the  foregoing,   "Transition
                  Activities"  shall mean and include all [***] ongoing on [***]
                  which will be completed  [***] and  specifically  includes the
                  activities and expenses set forth on Exhibit F.




5.4      CRF RESEARCH AND CRF DEVELOPMENT PROJECT TEAMS.

         (a)      ESTABLISHMENT.  Within sixty (60) days of the Effective  Date,
                  the Parties will establish a CRF Research  Project Team and at
                  least one CRF  Development  Project  Team  (collectively,  the
                  "Project  Teams").  It is acknowledged that there is likely to
                  be a different Development Project Team for each Collaboration
                  Product (except in the case of certain Back-Up Compounds), and
                  references  to "CRF  Development  Project  Team" and  "Project
                  Teams" shall be interpreted accordingly.

         (b)      COMPOSITION AND MEETINGS.

                  (i)      The CRF  Research  Project  Team shall be composed of
                           equal  representatives from both Parties. The Parties
                           shall each  designate  a Project  Team Leader so that
                           there will always be one Co-Project  Leader from each
                           Party.

                  (ii)     Each CRF  Development  Project Team shall be composed
                           of  representatives of both Parties but shall consist
                           primarily of GSK representatives.  The Project Leader
                           for each CRF  Development  Project Team shall, at all
                           times, be a GSK representative.

                  (iii)    Each  Project  Team Leader or, in the case of the CRF
                           Project  Research Team, the Co-Project  Leaders shall
                           be responsible for the administration of meetings but
                           shall have no additional  powers or rights other than
                           those  held by virtue of being a  representative,  or
                           representatives,   on  the  relevant   Project  Team.
                           Decisions  of each Project Team shall be by unanimous
                           vote with each Party having one vote each. Should the
                           members of a Project  Team  become  deadlocked  on an
                           issue,  then  after  a good  faith  but  unsuccessful
                           effort to break  such  deadlock  the  issue  shall be
                           presented to the Steering  Committee for  resolution.
                           The  Project  Teams  shall meet at least on a monthly
                           basis  either  in  person  or by  videoconference  or
                           teleconference.  Each Party shall be responsible  for
                           expenses  incurred  by  its  employees   incurred  in
                           attending or otherwise  participating in Project Team
                           meetings.

         (c)      CRF RESEARCH PROJECT TEAM RESPONSIBILITIES. In addition to its
                  general responsibility to oversee the day to day management of
                  the CRF Research Program,  the CRF Research Project Team shall
                  (i)  implement  the CRF  Research  Plan;  (ii)  update the CRF
                  Research Plan on an annual basis,  including  preparing,  on a
                  rolling  basis,  the detailed plan for the  following  year as
                  well as the more  general plan for the  remaining  term of the
                  Program  (ii)  submit  the  work  referred  to in  (i)  to the
                  Steering  Committee for its approval and (iii) provide regular
                  updates for, and report to, the Steering  Committee on matters
                  relating to its area of responsibility.

         (d)      CRF DEVELOPMENT PROJECT TEAM(S) RESPONSIBILITIES.  In addition
                  to  its  general  responsibility  to  oversee  the  day to day
                  management   of  the  CRF   Development   Program,   each  CRF
                  Development  Project  Team,  insofar  as such  relates  to the
                  particular    Collaboration   Product   for   which   it   has
                  responsibility,  shall (i) where a plan does not already  form
                  part of the CRF  Development  Plan,  draft  such  plan for the
                  particular    Collaboration   Product   for   which   it   has
                  responsibility,  with a view to same being  incorporated  into
                  and forming part of the CRF  Development  Plan; (ii) implement




                  the CRF  Development  Plan;  (iii) update the CRF  Development
                  Plan on an annual  basis;  (iv) submit the work referred to in
                  (i) (if applicable) and (ii) to the Steering Committee for its
                  approval;  and (v) provide regular updates for, and report to,
                  the  Steering  Committee  on matters  relating  to its area of
                  responsibility.

5.5      PERFORMANCE  OBJECTIVES.  GSK  and  Neurocrine  will  use  Commercially
         Reasonable  Efforts  to  achieve  the goals of the  Collaboration,  the
         Research Programs and the Development Programs.  In addition,  GSK will
         use  Commercially  Reasonable  Efforts  to [***]  in  order  to  [***].
         Specifically,   GSK  will  use  Commercially   Reasonable  Efforts  and
         diligence in researching and developing  Collaboration Products, and in
         undertaking  investigations  and actions required to obtain appropriate
         governmental   approvals  to  market   Collaboration   Product  in  the
         Territory.  GSK shall  also use  Commercially  Reasonable  Efforts  and
         diligence to market and sell Collaboration Products in the Territory.

                                   ARTICLE SIX

                       MANUFACTURING AND COMMERCIALIZATION

6.1      MANUFACTURING OF COLLABORATION PRODUCTS.

         (a)      CLINICAL AND COMMERCIAL MANUFACTURING. GSK will be responsible
                  for  manufacturing of all clinical  development and commercial
                  supplies  of  Collaboration  Products.  To give  effect to the
                  foregoing,  Neurocrine shall, as soon as practicably  possible
                  after the  Effective  Date,  [***],  as GSK  shall  reasonably
                  require.

         (b)      RESEARCH.   Manufacturing  of  CRF  Antagonist  Compounds  for
                  research  purposes  shall be as set forth in the CRF  Research
                  Plan.

6.2      COMMERCIALIZATION OF COLLABORATION PRODUCTS. GSK in its sole discretion
         will make all decisions regarding the  commercialization  and sales and
         marketing of Collaboration  Products in the Territory and will book all
         sales of Collaboration  Products. GSK will use Commercially  Reasonable
         Efforts to commercialize Collaboration Products in all countries of the
         Territory.

6.3      CO-COMMERCIALIZATION.   For  the  purposes  of  this   Agreement,   and
         specifically  this Section 6.3,  the terms  "Co-Commercialization"  and
         Co-Commercialize"  shall mean any and all activity related to the [***]
         of Collaboration Product(s) sold under GSK's trademark(s) by members of
         Neurocrine's  [***]  field  sales  force  where such field  sales force
         members are [***] and otherwise  subject to and in accordance  with the
         provisions  of this  Section  6.3.  Subject to the  provisions  of this
         Section 6.3,  Neurocrine  will have an option to  Co-commercialize  all
         Collaboration  Products  [***]  (the  "Co-Commercialization   Option").
         Neurocrine may only exercise the  Co-Commercialization  Option if [***]
         hereunder,  and  thereafter,  [***]  has or will have the [***] and the
         [***] and [***].  Subject to the foregoing,  and  notwithstanding  that
         such  Co-Commercialization  Option [***],  such Option can only be, and
         must be,  exercised during the period beginning on the [***] and ending
         on the [***].  Neurocrine shall then be entitled to provide up to [***]
         field sales force  representatives in the  Co-Commercialization  of all
         Collaboration Products. Before commencing  Co-Commercialization,  [***]
         shall be entitled to [***] field  force  representatives  first  [***].
         Thereafter,  such Neurocrine field force  representatives  shall at all
         times  carry out their  Co-Commercialization  activities  (i) under the
         [***] and (ii) [***].  [***] for  Co-Commercialization  activities on a
         [***] basis [***] and the [***] with the [***] of the particular  [***]
         and  provided  always  that the [***]  hereunder  shall  [***] for such
         [***]. For the avoidance of doubt, [***].




         The Parties hereby  acknowledge that the foregoing  principles may need
         to be  further  set out in detail at the time the  Co-Commercialization
         Option is exercised by Neurocrine (and so long as any such new detailed
         terms do not deviate in any way from such principles).

6.4      TRADEMARKS.  All trademarks associated with Collaboration Products will
         be  selected  and  owned  by  GSK  and  maintained  at  GSK's  expense.
         Neurocrine  shall be granted a license under the GSK  trademarks to the
         extent  necessary  for  Neurocrine  to  Co-Commercialize  Collaboration
         Products  consistent with Section 5.3 above.  The terms of such license
         shall be agreed by the Parties in good faith and a license  executed by
         same as soon as possible after the exercise of the Co-Commercialization
         Option by Neurocrine pursuant to Section 5.3 and no later than the nine
         (9) months  anniversary  of the first NDA filing by or on behalf of GSK
         for the first Collaboration  Product.  Under no circumstances shall any
         Co-Commercialization  activity be undertaken by Neurocrine without such
         license having already been agreed and executed by the Parties.

                                  ARTICLE SEVEN

                         FEES, ROYALTIES AND MILESTONES

7.1      LICENSE  FEES.  In   consideration   for  the  license  rights  granted
         hereunder,  within thirty (30) days of the Effective  Date, and subject
         to receipt by GSK of an appropriate invoice therefore,  GSK will pay to
         Neurocrine   [***]  as  a   technology   access  fee.   As   additional
         consideration for the license rights granted  hereunder,  within thirty
         days of receipt by GSK of an appropriate invoice therefore, anniversary
         payments of [***] each will be paid by GSK to  Neurocrine  on the [***]
         anniversaries  of the  Effective  Date.  If the Parties  have  mutually
         agreed to extend the Research  Program for a [***]  pursuant to Section
         5.2 (a) then as further additional consideration for the license rights
         granted  hereunder,  within  thirty  (30) days of  receipt by GSK of an
         appropriate invoice therefore,  anniversary payments of [***] each will
         be paid by GSK to Neurocrine on the [***] of the Effective Date. If the
         Parties do not mutually agree to extend the CRF Research  Program for a
         further  [***] but,  pursuant to Section 5.2 (a), the Parties  continue
         into a [***] of the CRF  Research  Program  (to allow  for the  orderly
         winding  down and  transition  of  activities  carried  out  during the
         [***]),  then,  as further  additional  consideration  for the  license
         rights granted hereunder,  within thirty (30) days of receipt by GSK of
         an appropriate  invoice therefore,  GSK will pay to Neurocrine [***] on
         the [***] of the Effective Date and an additional [***] upon completion
         of all such winding down and transitional activities.

7.2      ROYALTY RATES. GSK will pay to Neurocrine,  incremental  Royalties on a
         country by country and Collaboration  Product by Collaboration  Product
         basis, which Royalties shall be equal to:

         Annual Net Sales in the Territory of
          less than or equal to [***]                                      [***]

         Annual Net Sales in the Territory greater
         than [***] and less than or equal to [***]                        [***]

         Annual Net Sales in the Territory in excess of [***]              [***]

         For the avoidance of doubt, the thresholds  referred to in this Section
         7.2 are  thresholds  for,  and  determined  on,  [***].  GSK's  royalty
         obligations  under this  Section  7.2 shall  become  effective  in each
         country  in the  Territory  at such  time as GSK,  its  sublicensee  or
         Affiliate has commenced selling  Collaboration Product in such country.
         For the purposes of Royalty payments,  [***] of a Collaboration Product
         will be considered to be the same Collaboration Product,  regardless of
         the [***] for which such Collaboration Product may be used.




7.3      ROYALTY ADJUSTMENTS.  Royalties on a Collaboration  Product are subject
         to reductions and  adjustments as a result of certain events  specified
         in this  Agreement  including but not limited to those set forth below;
         provided,  however,  in no  event  will  Royalties  on a  Collaboration
         Product  in any  country be reduced by more than [***] by reason of the
         adjustments set forth below.

         (a)      ROYALTY  ADJUSTMENT FOR GENERIC  PRODUCTS.  If, during a given
                  calendar quarter, there is Generic Competition in a particular
                  country then,  for each such country in which there is Generic
                  Competition,  the Royalties  payable to Neurocrine for the Net
                  Sales of such  Collaboration  Product in such  country  during
                  such calendar  quarter will be reduced by [***] of the royalty
                  rate(s) set forth in Section 7.2 above.

         (b)      THIRD PARTY ROYALTIES.  Other than the payment by [***] of any
                  existing or future  payments  referred to and  contemplated by
                  Section  7.4,  the first [***] of  royalties  payable to Third
                  Parties  for  Patent  Rights  required  to  make,  use or sell
                  Collaboration  Products shall be borne by [***] and thereafter
                  shall be shared  equally by the Parties.  For the avoidance of
                  doubt,  no license fee or milestone  payments to Third Parties
                  shall be creditable  against  royalties  payable to Neurocrine
                  under this Article Seven.

7.4      [***] ROYALTY.  [***] will be responsible for all payments to the [***]
         and/or any [***] and/or  licensee (or any successor  entity or entities
         thereof,) under or in connection with the [***]. [***] will have all of
         the rights set forth in that  agreement  to be afforded to [***] of any
         technology licensed thereunder  including,  without limitation,  in the
         event of a [***] the right  under  [***] (as  defined  in  Section  2.3
         above),  directly with [***] which [***] would be on the [***].  In the
         event that [***],  all payments  made [***] shall in each case be [***]
         from  any  payments  [***]  or  thereafter  becomes  [***]  under  this
         Agreement.

7.5      TERM OF ROYALTY.  Royalties will be payable on a country by country and
         a Collaboration  Product by Collaboration Product basis until the later
         of (i) the last to expire of the  Patent  Rights  included  within  the
         Collaboration  Technology,  containing  a Valid  Claim  which  would be
         infringed by the sale of such Collaboration  Product in such country or
         (ii)  10  (ten)  years  following  the  First  Commercial  Sale in such
         country. Upon the expiration of GSK's final remaining obligation to pay
         Royalties  to  Neurocrine  hereunder  with  respect to a  Collaboration
         Product in each such country, GSK shall have a fully paid, irrevocable,
         exclusive and unrestricted  license under the Neurocrine  Technology to
         make,  have  made,  use,  sell,  and  offer  to sell  and  import  such
         Collaboration Product in such country.

7.6      REPORTS AND PAYMENTS.

         (a)      CUMULATIVE  ROYALTIES.  The obligation to pay Royalties  under
                  this Article Seven shall be imposed only once (i) with respect
                  to any sale of the same unit of Collaboration Product and (ii)
                  with  respect  to  a  single  unit  of  Collaboration  Product
                  regardless of how many Valid Claims of Patent Rights  included
                  in the Collaboration Technology would, but for this Agreement,
                  be  infringed  by  the  making,   using  or  selling  of  such
                  Collaboration Product.

         (b)      STATEMENTS  AND  PAYMENTS.  GSK shall  deliver  to  Neurocrine
                  within sixty (60) days after the end of each calendar quarter,
                  a  report  certified  by GSK as  accurate  to the  best of its
                  ability based on information  then  available to GSK,  setting
                  forth for such calendar quarter the following information on a
                  Collaboration  Product by Collaboration Product basis: (i) Net
                  Sales of the  Collaboration  Product,  (ii) the  basis for any
                  adjustments  to  the  Royalty  payable  for  the  sale  of the
                  Collaboration  Product and (iii) the Royalty due hereunder for
                  the sale of the Collaboration  Product.  The total Royalty due
                  for the  sale of  Collaboration  Products  during  a  calendar
                  quarter shall be remitted at the time such report is made.




         (c)      TAXES AND WITHHOLDING.  All payments under this Agreement will
                  be made without any deduction or withholding for or on account
                  of any tax unless such deduction or withholding is required by
                  applicable  law or  regulations.  If the  paying  Party  is so
                  required  to deduct or withhold  such Party will (i)  promptly
                  notify the other  Party of such  requirement,  (ii) pay to the
                  relevant  authorities  the full amount required to be deducted
                  or withheld promptly upon the earlier of determining that such
                  deduction or withholding is required or receiving  notice that
                  such amount has been assessed  against the other Party,  (iii)
                  promptly  forward to the other Party an  official  receipt (or
                  certified copy) or other documentation  reasonably  acceptable
                  to the other Party evidencing such payment to the authorities.
                  In case the other Party can not take a full credit against its
                  tax liability for the  withholding tax deducted or withheld by
                  the paying  Party,  then such other Party may propose a change
                  to the then  current  arrangement  with respect to the flow of
                  moneys  under this  Agreement  in order to reduce or eliminate
                  the  extra  cost  for  any  Party  and  the  Parties,  with no
                  obligation as to outcome,  shall discuss such proposal in good
                  faith.

         (d)      CURRENCY. All amounts payable and calculations hereunder shall
                  be in United States dollars. As applicable, Net Sales shall be
                  translated into United States dollars in accordance with GSK's
                  customary  and  usual  translation  procedures,   consistently
                  applied. If governmental  regulations prevent remittances from
                  a foreign  country with respect to sales made in that country,
                  the royalties  shall  continue to accrue but the obligation of
                  GSK to pay royalties on sales in that country shall be delayed
                  until such remittances are possible. Neurocrine shall have the
                  right, upon giving written notice to SB, to receive payment in
                  that country in local currency.

         (e)      MAINTENANCE OF RECORDS; AUDIT. For a period of four (4) years,
                  GSK  shall   maintain  and  shall  cause  its  Affiliates  and
                  sublicensees  to  maintain  complete  and  accurate  books and
                  records in connection with the sale of Collaboration  Products
                  hereunder,  as necessary to allow the accurate  calculation of
                  Royalties  due  hereunder  including  any records  required to
                  calculate any Royalty adjustments hereunder. Once per calendar
                  year Neurocrine  shall have the right to engage an independent
                  accounting firm reasonably  acceptable to GSK, at Neurocrine's
                  expense,  which shall have the right to examine in  confidence
                  the  relevant  GSK records as may be  reasonably  necessary to
                  determine  and/or  verify the amount of Royalty  payments  due
                  hereunder.  Such  examination  shall be conducted during GSK's
                  normal business hours,  after at least fifteen (15) days prior
                  written notice to GSK and shall take place at the GSK facility
                  (ies) where such  records are  maintained.  In the event there
                  was an under-payment by GSK hereunder, GSK shall promptly but
                  in no event later than thirty (30) days after GSK's receipt of
                  the independent  auditor's  report) make payment to Neurocrine
                  of any short-fall. In the event that there was an over-payment
                  by GSK hereunder,  Neurocrine  shall promptly but in no event
                  later than thirty (30) days after Neurocrine's  receipt of the
                  independent  auditor's report so correctly  concluding) refund
                  to GSK the  excess  amount.  In the event any  payment  by GSK
                  shall prove to have been  incorrect  by more than five percent
                  (5%) to  Neurocrine's  detriment,  GSK will pay the reasonable
                  fees  and  costs  of  Neurocrine's   independent  auditor  for
                  conducting such audit.

7.7      MILESTONES.   In  consideration  for  the  license  rights  granted  by
         Neurocrine to GSK hereunder, on the first occurrence of the development
         events set forth below, GSK shall make payments within thirty (30) days
         of the occurrence of the following milestones and subject to receipt by
         GSK, in each case, of an appropriate invoice therefore:




         MILESTONE EVENT                               MILESTONE

         Delivery to GSK of [***] CRF 1
         Receptor [***]                                 $ [***]

         Development of [***]                           $ [***]

         [***] Selection                                $ [***]

         [***] Selection                                $ [***]

         [***] Initiated                                $ [***]

         The Milestones  for Delivery [***] and  Development of [***] shall each
         be  payable  [***] upon the first  achievement  of the  Milestone.  The
         Milestone for [***] Selection shall be payable [***]. The Milestone for
         [***]  Selection  shall be  payable  [***].  The  Milestone  for  [***]
         Initiated  shall  be  payable  [***].  For the  purposes  of the  above
         Milestones,  the  following  defined  terms  shall  have  the  meanings
         assigned:

         "[***]  Selection"  shall mean  selection  of a  Compound  for [***] as
         defined [***]. Approximately [***] Compounds should be at this stage at
         any given time.

         "[***]  Selection"  shall mean  selection  of a  Compound  for [***] as
         defined [***]. Approximately [***] Compounds should be at this stage at
         any given time.

         "Development  [***]" shall mean the  development  of a [***],  provided
         always,  that such  development  meets the criteria set in the Research
         Plan and has taken  place  subject  to,  and in  accordance  with,  the
         timelines set by the Steering  Committee  (failing which [***] shall be
         deemed for this purpose not to have taken place).

         "[***] Initiated" shall mean [***] but which shall specifically exclude
         in this context, for the avoidance of doubt, [***].

         In  consideration  for the license  rights granted by Neurocrine to GSK
         hereunder,  on a [***] basis, up to a maximum of [***], and on an [***]
         basis  for up to  [***],  GSK  will  pay to  Neurocrine  the  following
         milestone payments within thirty (30) days following achievement of the
         following  events and  Neurocrine  shall in each case,  provide  GSK an
         appropriate invoice therefore:

         MILESTONE EVENT                       [***]    [***]    [***]


         [***] Phase [***]
                  Study in [***]              $[***]   $[***]   $[***]

         [***]Phase [***]
                  Study in [***]              $[***]   $[***]   $[***]

         [***] Phase [***]
                  Study in [***]              $[***]   $[***]   $[***]

         Filing of [***]                      $[***]   $[***]   $[***]

         Marketing Approval:  [***]           $[***]   $[***]   $[***]

         Marketing Approval:  [***]
                  [***]                       $[***]   $[***]   $[***]

         Marketing Approval: [***]            $[***]   $[***]   $[***]




         In the event  development of a Collaboration  Product is  discontinued,
         only  those  Milestones  that  have not yet  been  paid at the time the
         Collaboration  Product  has been  discontinued  will be  available  for
         payment for future Collaboration Products achieving Milestone Events.

         For the purposes of the above  Milestones,  the following defined terms
         shall have the meanings  assigned below. In addition,  for the purposes
         of the above Milestones,  a study may be both a Phase [***] and a Phase
         [***]  study  depending  on  the  study  design  in  which  event  both
         applicable  Milestones  (if  previously  unpaid)  will be  payable on a
         single  study.  Further,  in the  event a Phase  [***]  study  shall be
         unnecessary  (as  in the  situation  where  [***]  and  [***]),  if the
         Milestone  for [***] Phase [***] study has not been paid at the time of
         [***], it shall be deemed payable at that time.

         "Phase [***] Study" shall mean a study to [***].

         "Phase [***] Study" shall mean a study to [***].

         "Phase [***] Study" shall mean a [***] clinical study [***].

         "Marketing  Approval"  shall mean the grant by the relevant  regulatory
         authority (ies), in the country specified,  of the requisite Regulatory
         Approval(s)  (including  pricing and/or  reimbursement  approval(s)) to
         enable commercialization in such country of Collaboration Product.

         "Indication"  shall mean an  individual  disease or clinical  condition
         with respect to which [***] provided always that,  notwithstanding  the
         foregoing,  [***]  shall  always be  deemed,  for the  purpose  of this
         Agreement  and  specifically  this  Article  7, to be [***]  only  and,
         further, in respect of such [***] the following shall apply:

         (i)      achievement of a Marketing  Approval for any [***] shall incur
                  [***] of milestone payments (dependant on whether such [***]),
                  for each Collaboration Product, up to [***];

         (ii)     if after Marketing Approval of a Collaboration Product for any
                  of [***]  noted in Section A of Exhibit E, such  Collaboration
                  Product also receives Marketing Approval [***] for one or more
                  [***]   identified  in  Section  B  of  Exhibit  E  [***],  an
                  additional  [***]  milestone  payment  will  be paid by GSK to
                  Neurocrine in respect of such [***] but up to maximum of [***]
                  for each [***] up to a maximum of [***].  The foregoing  shall
                  be  without  prejudice  to  the  general  principle  that  all
                  milestone payment obligations hereunder shall be restricted to
                  a maximum of [***];

                                  ARTICLE EIGHT

                        CONFIDENTIALITY, PUBLICATION AND

                              PUBLIC ANNOUNCEMENTS

8.1      CONFIDENTIALITY.  Except to the  extent  expressly  authorized  by this
         Agreement or otherwise  agreed in writing,  the Parties agree that, for
         the term of this  Agreement  and for ten (10)  years  thereafter,  each
         Party (the  "Receiving  Party"),  receiving  hereunder any  information
         designated hereunder as Confidential  Information of the other Party or
         information of the other Party marked  "Confidential"  (in either case,
         the "Disclosing Party"),  shall keep such information  confidential and
         shall not publish or  otherwise  disclose or use for any purpose  other
         than as provided for in this  Agreement  except,  to the extent that it
         can be established:




         (a)      by the Receiving Party that the  Confidential  Information was
                  already  known to the  Receiving  Party  (other  than under an
                  obligation of  confidentiality),  at the time of disclosure by
                  the Disclosing  Party and such Receiving Party has documentary
                  evidence to that effect;

         (b)      by the Receiving Party that the  Confidential  Information was
                  generally  available  to the public or  otherwise  part of the
                  public  domain at the time of its  disclosure to the Receiving
                  Party;

         (c)      by the  Receiving  Party  that  the  Confidential  Information
                  became generally  available to the public or otherwise part of
                  the public domain after its disclosure or development,  as the
                  case may be, and other than  through  any act or omission of a
                  party in breach of this confidentiality obligation;

         (d)      by the Receiving Party that the  Confidential  Information was
                  disclosed  to that Party,  other than under an  obligation  of
                  confidentiality, by a Third Party who had no obligation to the
                  Disclosing Party not to disclose such information to others;

         (e)      by the Receiving Party that the  Confidential  Information was
                  independently  discovered or developed by the Receiving  Party
                  without the use of the Confidential  Information  belonging to
                  the  other  Party  and the  Receiving  Party  has  documentary
                  evidence to that effect

8.2      AUTHORIZED DISCLOSURE.

         (a)      EACH PARTY. Each Party may disclose  Confidential  Information
                  belonging to the other Party to the extent such  disclosure is
                  reasonably necessary to:

                  (i)      file  or  prosecute  patent   applications   claiming
                           inventions    included   within   the   Collaboration
                           Technology,

                  (ii)     prosecute or defend litigation,

                  (iii)    exercise rights hereunder provided such disclosure is
                           covered by terms of confidentiality  similar to those
                           set forth herein, and

                  (iv)     comply   with   applicable   governmental   laws  and
                           regulations.

         In the event a Party shall deem it  necessary  to disclose  pursuant to
         this Section 8.2 (a),  Confidential  Information belonging to the other
         Party,   the  Disclosing  Party  shall  to  the  extent  possible  give
         reasonable  advance  notice of such  disclosure  to the other Party and
         take  reasonable  measures  to ensure  confidential  treatment  of such
         information.

         (b)      USE. GSK shall have the right to use  Neurocrine  Confidential
                  Information  in  the  conduct  of  the  R&D  Programs  and  in
                  developing   and   commercializing   Collaboration   Products.
                  Neurocrine  shall  have  the  right  to use  GSK  Confidential
                  Information in the conduct of the R&D Programs.

8.3      SEC  FILINGS.  The Parties will consult with one another with a view to
         agreeing the terms of this  Agreement that shall be redacted in any SEC
         filing(s) that may be required to be made.

8.4      PUBLICATIONS. During the term of the Research Programs, each Party will
         submit to the Steering  Committee  for review and approval all proposed
         academic,  scientific  and  medical  publications  relating  to the R&D
         Programs,  Collaboration  Products and/or Collaboration  Technology for




         review in  connection  with  preservation  of exclusive  Patent  Rights
         and/or to determine whether Confidential Information should be modified
         or deleted.  The Steering Committee shall have no less than thirty (30)
         days to review  each  proposed  publication.  The review  period may be
         extended  for  an  additional   thirty  (30)  days  in  the  event  the
         nonpublishing  Party  can  demonstrate  to  the  Steering  Committee  a
         reasonable need for such extension  including,  but not limited to, the
         preparation  and  filing of patent  applications.  Such  period  may be
         further  extended by the Steering  Committee.  GSK and Neurocrine  will
         each comply with standard  academic  practice  regarding  authorship of
         scientific  publications  and  recognition  of  contribution  of  other
         parties in any  publications  relating to R&D  Programs,  Collaboration
         Products   and/or   Collaboration   Technology.   Notwithstanding   the
         foregoing,  the Parties shall endeavor as far as possible, for ease and
         convenience,  to agree on a universal basis joint authorship in respect
         of such publications.

8.5      PUBLIC ANNOUNCEMENTS.

         (a)      COORDINATION.   The  Parties   agree  on  the   importance  of
                  coordinating  their  public   announcements   respecting  this
                  Agreement and the subject matter thereof (other than academic,
                  scientific  or medical  publications  that are  subject to the
                  publication  provision  set forth above).  Neurocrine  and GSK
                  will, from time to time, and at the request of the other Party
                  discuss and agree on the general  information content relating
                  to this Agreement,  the R&D Programs,  Collaboration  Products
                  and/or   Collaboration   Technology   which  may  be  publicly
                  disclosed.

         (b)      ANNOUNCEMENTS. The Parties have agreed that all events arising
                  out  of  the   collaborative   development  of   Collaboration
                  Products,  which in  Neurocrine's  judgment  are  material  to
                  Neurocrine,  will be  promptly  disclosed.  In  addition,  the
                  Parties   have   acknowledged   that  the   progress   of  the
                  Collaboration   in  general  is  material  to  Neurocrine  and
                  therefore  have  agreed to make  regular  public  disclosures,
                  whether by press release or publication, describing the status
                  of the development of Collaboration  Products.  These releases
                  may be Neurocrine  releases or joint  Neurocrine/ GSK releases
                  at  GSK's   option.   Neither   Party  will  make  any  public
                  announcement  regarding  this  Agreement,  the  R&D  Programs,
                  Collaboration Products and/or Collaboration  Technology (other
                  than academic,  scientific or medical  publications  which are
                  subject to the publication  provision set forth above) without
                  making  good  faith  efforts to  provide  the other  Party the
                  opportunity  to review and comment prior to release unless the
                  specific  disclosure  is  required  by law and  time  does not
                  permit delay.  Notwithstanding  the foregoing,  with regard to
                  any public  announcement  relating to the fact of execution of
                  this  Agreement by the parties  hereof,  and the terms of such
                  Agreement,  neither  Party  shall  make any such  announcement
                  without the prior consent of the other.

                                  ARTICLE NINE

                                 INDEMNIFICATION

9.1      INDEMNIFICATION  BY GSK. GSK will  indemnify,  defend and hold harmless
         Neurocrine, its licensees, sublicensees and Affiliates, and each of its
         and their respective employees, officers, directors and agents (each, a
         "Neurocrine Indemnified Party") from and against any and all liability,
         loss,  damage,   expense  (including  reasonable  attorneys'  fees  and
         expenses) and cost  (collectively,  a "Liability") which the Neurocrine
         Indemnified  Party may be required to pay to one or more Third  Parties
         resulting  from or arising  out of (i) any claims of any nature  (other
         than claims by Third Parties relating to patent  infringement)  arising
         out of (y) the  conduct  of the R&D  Programs  or use of  Collaboration
         Technology  of by, on behalf of or under  authority of, GSK (other than
         by a Neurocrine Indemnified Party) or (z) research,  development and/or




         commercialization  of Collaboration  Products by, on behalf of or under
         authority of, GSK (other than by Neurocrine  Indemnified  Party) and/or
         (ii) any GSK  representation  or warranty set forth herein being untrue
         in any material  respect when made,  except in each case, to the extent
         caused by the  negligence  or willful  misconduct  of Neurocrine or any
         Neurocrine Indemnified Party.  Notwithstanding the foregoing, GSK shall
         have no obligation to defend, indemnify or hold harmless any Neurocrine
         Indemnified  Party from and  against  any  Liability  arising out of or
         resulting from the infringement of a Third Party Patent Right.

9.2      INDEMNIFICATION  BY NEUROCRINE.  Neurocrine will indemnify,  defend and
         hold harmless GSK, its licensees, sublicensees and Affiliates, and each
         of its and their respective employees,  officers,  directors and agents
         (each,  a "GSK  Indemnified  Party") from and against and all Liability
         which the GSK  Indemnified  Party may be required to pay to one or more
         Third  Parties  arising out of (i) any claims of any nature (other than
         claims by Third Parties relating to patent infringement) arising out of
         (x) the conduct of the R&D Program or use of  Collaboration  Technology
         of by, on behalf of or under authority of,  Neurocrine (other than by a
         GSK   Indemnified   Party)   or  (y)   research,   development   and/or
         commercialization  of Collaboration  Products by, on behalf of or under
         authority of, Neurocrine (other than by a GSK Indemnified Party) and/or
         (ii) any Neurocrine  representation  or warranty set forth herein being
         untrue in any material  respect when made,  except in each case, to the
         extent caused by the negligence or willful misconduct of GSK or any GSK
         Indemnified Party. Notwithstanding the foregoing, Neurocrine shall have
         no obligation to defend, indemnify or hold harmless any GSK Indemnified
         Party from and against any Liability  arising out of or resulting  from
         the infringement of a Third Party Patent Right.

9.3      PROCEDURE.  Each  Party  will  notify the other in the event it becomes
         aware of a claim for which indemnification may be sought hereunder.  In
         case any proceeding (including any governmental investigation) shall be
         instituted  involving  any Party in respect of which  indemnity  may be
         sought  pursuant to this  Article  Nine,  such Party (the  "Indemnified
         Party")  shall  promptly  notify  the other  Party  (the  "Indemnifying
         Party") in writing and the  Indemnifying  Party and  Indemnified  Party
         shall meet to discuss how to respond to any claims that are the subject
         matter of such proceeding.  The Indemnifying Party, upon request of the
         Indemnified Party, shall retain counsel reasonably  satisfactory to the
         Indemnified  Party to represent the Indemnified Party and shall pay the
         fees and expenses of such counsel  related to such  proceeding.  In any
         such proceeding,  the Indemnified  Party shall have the right to retain
         its own counsel,  but the fees and expenses of such counsel shall be at
         the expense of the Indemnified Party unless (i) the Indemnifying  Party
         and the  Indemnified  Party shall have mutually agreed to the retention
         of such  counsel  or (ii) the  named  parties  to any  such  proceeding
         (including any impleaded  parties) include both the Indemnifying  Party
         and the  Indemnified  Party and  representation  of both parties by the
         same  counsel  would  be  inappropriate  due  to  actual  or  potential
         differing  interests  between them. All such fees and expenses shall be
         reimbursed as they are incurred.  The  Indemnifying  Party shall not be
         liable  for any  settlement  of any  proceeding  effected  without  its
         written  consent,  but if  settled  with such  consent or if there be a
         final  judgment for the  plaintiff,  the  Indemnifying  Party agrees to
         indemnify the Indemnified  Party from and against any loss or liability
         by reason of such settlement or judgment.  The Indemnifying Party shall
         not, without the written consent of the Indemnified  Party,  effect any
         settlement of any pending or threatened  proceeding in respect of which
         the Indemnified Party is, or arising out of the same set of facts could
         have been, a party and  indemnity  could have been sought  hereunder by
         the Indemnified Party, unless such settlement includes an unconditional
         release of the Indemnified  Party from all liability on claims that are
         the subject matter of such proceeding.




                                   ARTICLE TEN

                              TERM AND TERMINATION

10.1     TERM.  Unless earlier  terminated by mutual agreement of the Parties or
         pursuant to the  provisions  of this Article Ten, this  Agreement  will
         continue  in full  force  and  effect  on a  Collaboration  Product  by
         Collaboration Product basis until the final obligation to pay Royalties
         with  respect  to the sale of such  Collaboration  Product in the final
         country expires as provided in Section 7.5 hereof. For the avoidance of
         doubt,  in the event of termination of the CRF Research  Program by GSK
         other than by reason of expiration of one of the two terms set forth in
         Section 5.2(a) such early termination of the CRF Research Program shall
         also constitute an automatic termination of this Agreement in full.

10.2     GSK UNILATERAL RIGHT TO TERMINATE.  GSK may terminate this Agreement at
         any time for any reason upon [***] prior written  notice to Neurocrine.
         In addition,  GSK may  terminate  this  Agreement on a [***] basis,  or
         [***] basis, by giving Neurocrine at least [***] written notice thereof
         at any time before [***] based on a reasonable  determination  by [***]
         using the same standards [***] would use in assessing whether or not to
         [***] does not justify [***]. After [***]  Collaboration  Product,  GSK
         may terminate this Agreement on a [***] basis,  or in its entirety,  or
         on a [***] basis,  by giving  Neurocrine  at least [***] prior  written
         notice  thereof based on a reasonable  determination  [***],  using the
         same  standards  [***] would use in  assessing  whether or not to [***]
         justify continued [***].

10.3     CONSEQUENCES  OF  TERMINATION OF AGREEMENT IN ITS ENTIRETY In the event
         of termination in toto of this Agreement:

         (i)      other than any license(s) granted to [***], all licenses [***]
                  herein will [***]:

         (ii)     [***] will [***] to [***] specifically referred to as [***] in
                  respect of [***] of the  Effective  Date and the [***] for the
                  [***] and not yet [***] under  Section  [***].  If the Parties
                  have extended the initial term of the CRF Research  Program by
                  [***] pursuant to Section 5.2 (a), [***] to [***] specifically
                  referred  to [***] in respect of [***] and not yet [***] under
                  Section [***];

         (iii)    [***] will provide to [***]  Collaboration  Product  [***] and
                  [***] to [***] R&D Program research, pre-clinical and clinical
                  [***]  Collaboration  Products  [***]  prior  to the  date  of
                  termination of this Agreement and [***] shall  thereafter have
                  [***];

         (iv)     [***] will [***] all [***] relating  Collaboration Products in
                  the Territory;

         (v)      [***] will [***] to [***] license  under the [***]  Technology
                  to make, have made, use,  import,  market,  offer for sale and
                  sell products in the Field of Use for [***] Purposes [***];

         (vi)     [***]  will  grant to [***]  license  under the  [***]  Patent
                  Rights,  to make, have made, use,  import,  market,  offer for
                  sale and sell products in the Field of Use for [***]  Purposes
                  [***],  provided  that,  [***] shall [***] retain the right to
                  [***]  Technology other than the [***] Patent Rights for [***]
                  use the [***] Patent Rights [***] Purposes; and

         (vi)     [***]  will  provide  to  [***]  any  other  [***]  reasonably
                  required   to   allow   [***]   research,    development   and
                  commercialization [***].




10.4     CONSEQUENCES OF TERMINATION OF THE AGREEMENT ON A COLLABORATION PRODUCT
         OR COUNTRY-BY-COUNTRY BASIS.

         (a)      Neurocrine  shall have the right in its sole discretion at its
                  sole  expense,  for its own benefit or  together  with a Third
                  Party,  to develop  and  commercialize  in the  Territory  any
                  Collaboration  Product  which [***]  pursuant to Section [***]
                  provided that [***] or any of its  sublicensees  is not [***],
                  or does not plan to [***] Product under this  Agreement  [***]
                  in this  context  shall mean any other  Collaboration  Product
                  [***]  exhibits  similar  [***]  and which is  targeted  [***]
                  market approval [***] as such [***].

         (b)      If GSK terminates [***] Neurocrine shall have the right in its
                  sole  discretion and at its sole expense,  for its own benefit
                  or   together   with  a  Third   Party,   to  develop   and/or
                  commercialize  such  [***]  but only in  those  [***] in which
                  [***] has elected  [***]  develop  and/or  commercialize  such
                  [***] and provided  that [***] or any of its  sublicensees  is
                  not  [***],  or does not  [***],  researching,  developing  or
                  commercializing  of [***] under this  Agreement  [***] in this
                  context shall have the same meaning as in Section [***].

         (c)      Subject to the  foregoing,  and if  Neurocrine  exercises  its
                  rights under this  Section  10.4 subject to and in  accordance
                  with such terms,  [***] shall  [***] to [***]  license  ([***]
                  sublicense) in the Territory (or in the case of [***],  in the
                  relevant  countries)  under the [***] Technology to make, have
                  made, use and sell [***] in the Field in so far as such relate
                  to [***] Purposes [***].  [***] shall also [***] with all such
                  [***]  which  [***],  or  its  sublicensees   reasonably  have
                  available  [***],  for example [***], and shall [***] as [***]
                  reasonably  requests,  to enable [***] appropriate  regulatory
                  approvals  [***]  in such  country  and for any  other  lawful
                  purpose related to development and commercialization of [***].

10.5     DEFAULT.  Either Party may terminate this Agreement for material breach
         by the other Party,  which breach remains  uncured for thirty (30) days
         in the case of nonpayment of any amount due and sixty (60) days for all
         other  breaches,  each  measured  from the date written  notice of such
         breach  is given to the  breaching  Party,  or,  if such  breach is not
         capable of remedy  within such sixty (60) day period and the  breaching
         Party uses diligent good faith efforts to cure such breach, ninety days
         (90) days after written notice to the breaching Party.

10.6     BANKRUPTCY. Each party may, in addition to any other remedies available
         to it by law or in  equity,  exercise  the  rights  set forth  below by
         written notice to the other Party (the "Insolvent Party"), in the event
         the Insolvent Party shall have become  insolvent or bankrupt,  or shall
         have made an  assignment  for the  benefit of its  creditors,  or there
         shall have been appointed a trustee or receiver of the Insolvent  Party
         or for  all or a  substantial  part  of its  property,  or any  case or
         proceeding  shall  have  been  commenced  or other  action  taken by or
         against the Insolvent  Party in  bankruptcy or seeking  reorganization,
         liquidation,   dissolution,  winding-up  arrangement,   composition  or
         readjustment  of its debts or any other  relief  under any  bankruptcy,
         insolvency,   reorganization  or  other  similar  act  or  law  of  any
         jurisdiction  now or  hereafter  in  effect,  or there  shall have been
         issued a warrant of attachment, execution, distraint or similar process
         against any  substantial  part of the property of the Insolvent  Party,
         and  any  such  event  shall  have   continued   for  sixty  (60)  days
         undismissed, unbonded and undischarged. All rights and licenses granted
         under or pursuant to this  Agreement  by  Neurocrine  and GSK are,  and
         shall otherwise be deemed to be, for purposes of Section 365 (n) of the
         U.S. Bankruptcy Code, licenses of rights to "intellectual  property" as
         defined  under  Section 101 of the U.S.  Bankruptcy  Code.  The Parties
         agree that the Parties as licensees of such rights under this Agreement
         shall retain and may fully  exercise all of their rights and  elections
         under the U.S.  Bankruptcy Code. The Parties further agree that, in the
         event of the  commencement  of a  bankruptcy  proceeding  by or against
         either Party under the U.S.  Bankruptcy  Code, the other Party shall be
         entitled  to a  complete  duplicate  of  (or  complete  access  to,  as




         appropriate) any such intellectual property and all embodiments of such
         intellectual   property,   and  same,  if  not  already  in  the  their
         possession,  shall  be  promptly  delivered  to them  (i) upon any such
         commencement  of a  bankruptcy  proceeding  upon  its  written  request
         therefore,  unless  the  Party  subject  to such  proceeding  elects to
         continue to perform all of their  obligations  under this  Agreement or
         (ii) if not  delivered  under (i)  above,  upon the  rejection  of this
         Agreement by or on behalf of the Party subject to such  proceeding upon
         written request therefore by the other Party.

         (a)      NEUROCRINE.  In the  event  Neurocrine  shall be an  Insolvent
                  Party,  GSK may  terminate the Research  Programs  and/or keep
                  this  Agreement  in full  force  and  effect  and  retain  all
                  licenses  granted by  Neurocrine  to GSK herein to make,  have
                  made,   use,   import,   market,   offer  for  sale  and  sell
                  Collaboration  Products in the Field of use in the  Territory,
                  subject to the  payment to  Neurocrine  of the  license  fees,
                  milestones and royalties set forth above.

         (b)      GSK. In the event GSK shall be an Insolvent Party,  Neurocrine
                  may, to the extent permitted by applicable law, terminate this
                  Agreement and the provision of Section 10.3. shall apply.

10.7     ACQUISITION OF NEUROCRINE.  Upon the Acquisition of Neurocrine (a) such
         that Neurocrine [***] or (b) such that,  [***],  Neurocrine [***] under
         this  Agreement  or (c) by a  Third  Party  who  is  [***]  immediately
         preceding the calendar  quarter in which the  Acquisition of Neurocrine
         has  taken  place) , GSK shall  have the  right to [***];  Neurocrine's
         [***]  but  otherwise   [***].  For  the  purposes  of  the  foregoing,
         "Acquisition"  shall mean the acquisition,  directly or indirectly,  by
         any Third Party of (i)  securities  authorized  to [***] or more of the
         votes  in any  election  of  directors  and/or  (ii)  the sale or other
         transfer of all or substantially all of its assets. Notwithstanding the
         foregoing,  the  sale or other  transfer  of  substantially  all of the
         assets  of  Neurocrine  to  another  direct  or  indirect  wholly-owned
         subsidiary of Neurocrine shall not constitute an Acquisition.

10.8     LIABILITIES.  Termination  of this  Agreement  shall not release either
         Party from any obligation or liability  which shall have accrued at the
         time of termination,  or preclude either Party from pursuing all rights
         at law and in equity with respect to any Default under this  Agreement.
         Notwithstanding  the  foregoing,  neither  Party  will  be  liable  for
         punitive,  exemplary  or  consequential  damages  incurred by the other
         Party arising out of any Default under this Agreement.

10.9     DISCLAIMER.  WITH  RESPECT  TO ANY DATA,  INFORMATION  OR  INTELLECTUAL
         PROPERTY THAT EITHER PARTY  BECOMES  OBLIGATED TO TRANSFER TO THE OTHER
         UNDER THIS ARTICLE TEN, THE TRANSFERING PARTY MAKES NO  REPRESENTATIONS
         AND EXPRESSLY DISCLAIMS AND MAKES NO WARRANTIES OF ANY KIND, WRITTEN OR
         ORAL, EXPRESS OR IMPLIED, INCLUDING,  WITHOUT LIMITATION ANY WARRANTIES
         OF  MERCHANTABILITY  OR FITNESS FOR A PARTICULAR  PURPOSE,  OR THAT ANY
         SUCH INFORMATION, DATA OR INTELLECTUAL PROPERTY IS ACCURATE OR COMPLETE
         OR  CAN  BE  USED  BY  THE  RECEIVING  PARTY  WITHOUT   INFRINGING  THE
         INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY.

                                 ARTICLE ELEVEN

                              INTELLECTUAL PROPERTY

11.1     INVENTORSHIP AND INVENTION OWNERSHIP.  The inventorship of an invention
         shall be determined in accordance  with the patent laws of the U.S. The
         ownership of an invention  shall be determined  in accordance  with the
         applicable patent laws of the country where the invention is conceived.
         Notwithstanding  the foregoing,  the Parties shall [***] Program Patent
         Rights and the Parties shall take all actions [***]  necessary to [***]
         and shall,  subject to the terms of this Agreement  including,  without
         limitation,  [***],  take all  actions  to provide  [***]  which is the
         subject of such Program  Patent Rights  including,  without  limitation
         [***]  therein or to otherwise  [***] such Program  Patent Rights [***]




         without [***] and without [***].  The Parties  recognize the importance
         of diligently  determining  the  inventorship  of a given invention and
         shall  co-operate as necessary in providing each other with  sufficient
         information to enable such a  determination  to be made, and shall make
         all reasonable efforts to reach agreement on such determination. In the
         event that the Parties cannot reach  agreement as to such  inventorship
         determination,  the matter will be passed to outside counsel acceptable
         to both Parties to make a final and binding determination, the costs of
         such determination to be borne jointly by the Parties.

11.2     PATENT PROSECUTION

         (a)      GSK PATENT RIGHTS. GSK shall [***], prepare,  file, prosecute,
                  and  maintain  in  countries  selected by GSK,  Patent  Rights
                  relating to GSK Technology ("GSK Patent Rights").

         (b)      NEUROCRINE  PATENT  RIGHTS.  Neurocrine  shall select  outside
                  counsel   acceptable   to  both  Parties  to  prepare,   file,
                  prosecute,  and maintain in countries  selected by GSK, Patent
                  Rights relating to Neurocrine  Technology  ("Neurocrine Patent
                  Rights"), [***] provided however that such expense [***].

         (c)      STATUS UPDATE.  GSK will update  Appendix A twice each year or
                  at  Neurocrine's  reasonable  request  during  the term of the
                  Agreement so as to reflect the most current status. of the GSK
                  Patent Rights.  Neurocrine  will update  Appendix B twice each
                  year or at GSK's  reasonable  request  during  the term of the
                  Agreement  so as to  reflect  the most  current  status of the
                  Neurocrine Patent Rights.

         (d)      REVIEW AND CONSULTATION. Each Party shall keep the other Party
                  informed  of  all  significant   steps  to  be  taken  in  the
                  preparation and prosecution of all patent  applications within
                  GSK Patent Rights and Neurocrine  Patent Rights  respectively,
                  and shall  furnish  the other  Party  with  copies of any such
                  applications, amendments thereto and other related significant
                  correspondence  to and from patent offices to allow for review
                  by and consultation with the other party reasonably in advance
                  of any  submission to a patent  office which could  materially
                  affect the scope or validity of the patent  coverage  that may
                  result.  Copies of all such  applications  filed  prior to the
                  Effective  Date shall be provided to the other Party  promptly
                  after the Effective Date. Comments made by or on behalf of the
                  other Party will be taken into account in the  preparation and
                  prosecution   of  such   applications.   Notwithstanding   the
                  foregoing  neither  Party  will make or allow  any  alteration
                  which  would  result  in  the  reduction  or  loss  of  patent
                  protection for Collaboration  Compounds without the consent of
                  the other Party, which shall not be unreasonably withheld.

         (e)      ABANDONMENT.  GSK will not  abandon  any GSK Patent  Rights or
                  permit any patent  issuing  therefrom to lapse  without  first
                  notifying  Neurocrine  and  permitting  them to  continue  the
                  prosecution of such patent applications and maintenance of any
                  patents  at  their  expense,   provided  however  that  [***].
                  Neurocrine  will not abandon any  Neurocrine  Patent Rights or
                  permit any patent  issuing  therefrom to lapse  without  first
                  notifying GSK and permitting  them to continue the prosecution
                  of such patent  applications  and  maintenance of any patents,
                  provided however that [***].

         (f)      ADDITIONAL  COUNTRIES.  In the event  that [***] wish a patent
                  application  within  Neurocrine  Patent  Rights  to be  filed,
                  prosecuted or maintained in a particular country additional to
                  those  countries  indicated  by [***],  then the costs of such
                  filing,   prosecution  and  maintenance  in  respect  of  that
                  application  in that country shall be borne [***],  and [***].
                  [***] will also have the right to  indicate  that it no longer
                  wishes to bear the costs for outside counsel to prepare, file,
                  prosecute, and maintain any aspect of Neurocrine Patent Rights
                  and shall give [***] sufficient notice and opportunity to bear
                  such costs, in which event [***].




         (g)      PROGRAM  PATENT  RIGHTS.  GSK  shall,  during  the term of the
                  Agreement,  [***], prepare,  file, prosecute,  and maintain in
                  countries selected by GSK, Program Patent Rights.

         (h)      CONSULTATION  AND REVIEW.  The Parties shall  promptly  inform
                  each other of all  inventions  within the Program  Technology,
                  shall  also  share all  relevant  information  regarding  such
                  inventions,  and shall consult  regarding the  preparation  of
                  appropriate patent  applications,  including in respect of the
                  scope and timing thereof.  GSK shall keep Neurocrine  informed
                  of  all  subsequent  significant  steps  to be  taken  in  the
                  prosecution of all patent  applications  within Program Patent
                  Rights,  and shall furnish  Neurocrine with copies of any such
                  applications, amendments thereto and other related significant
                  correspondence  to and from patent offices to allow for review
                  by and consultation  with Neurocrine  reasonably in advance of
                  any  submission  to a patent  office  which  could  materially
                  affect the scope or validity of the patent  coverage  that may
                  result.  Comments made by or on behalf of  Neurocrine  will be
                  taken into account in the  preparation and prosecution of such
                  applications.

         (i)      [***]  EXPENSE.  In the event  [***]  elects not to prepare or
                  file a patent  application in respect of inventions within the
                  Program  Technology or to maintain any applications or patents
                  included in the Program Patent Rights,  [***] shall give [***]
                  sufficient  notice and  opportunity to do so at [***] expense,
                  in which event [***].

         (j)      FURTHER  COUNTRIES.  In the  event  that  [***]  wish a patent
                  application  within  the  Program  Patent  Rights to be filed,
                  prosecuted or maintained in a particular country additional to
                  those  countries  indicated  by [***],  then the costs of such
                  filing,   prosecution  and  maintenance  in  respect  of  that
                  application  in  that  country  shall  be  borne  entirely  by
                  Neurocrine, in which event [***].

         (k)      STATUS REPORT.  [***] will provide a report twice each year or
                  at [***]  reasonable  request during the term of the Agreement
                  so as to reflect the most current status of the Program Patent
                  Rights.

         (l)      DEVELOPMENT  PATENT RIGHTS.  The  responsibility and costs for
                  the  preparation  and  filing  of  applications   relating  to
                  Development  Patent  Rights,  shall be borne  [***],  provided
                  however  that in the case of any such  inventions  and  Patent
                  Rights [***], the Parties shall have [***]. The responsibility
                  and costs for filing,  prosecuting  and  maintaining the [***]
                  will be borne by [***] and [***] shall keep [***]  informed of
                  all  significant  steps to be taken in the  prosecution of all
                  patent applications  relating thereto, and shall furnish [***]
                  with copies of any such  applications,  amendments thereto and
                  other related  significant  correspondence  to and from patent
                  offices  to allow for  review by and  consultation  with [***]
                  reasonably  in advance of any  submission  to a patent  office
                  which  could  materially  affect the scope or  validity of the
                  patent  coverage  that may result and  comments  made by or on
                  behalf of [***] will be taken into account in the  preparation
                  and prosecution of such applications.

11.3     EXTENSION  OF PATENT  RIGHTS.  At the time of the [***] in respect of a
         Collaboration  Product,  and where  the  Collaboration  Product  or the
         approved  use thereof is [***] shall  appoint  [***] or its designee as
         [***]agent  for the sole purpose of submitting an application to extend
         the term of such patent, an application for a Supplementary  Protection
         Certificate,  or an equivalent  thereof.  [***] shall  co-operate  with
         [***] or its designee in connection with any such application.




11.4     DEFENSE OF PATENT RIGHTS.  In respect of any proceeding  initiated by a
         Third Party which  challenges  the validity of,  enforceability  of, or
         entitlement to the [***],  and which  proceeding  does not also involve
         the  enforcement  of such  Patent  Rights as set out in  Section  [***]
         (including  but  not  limited  to  pre-grant   opposition,   post-grant
         opposition,  re-examination,  interference, and revocation proceedings)
         the  responsibilities,  costs and obligations for  consultation for the
         Parties apply in a similar  manner to those as set out in Section [***]
         in respect of [***].

11.5     ENFORCEMENT OF PATENT RIGHTS.

         (a)      NOTIFICATION.  Each Party shall promptly  notify each other of
                  any  infringement  of the Patent  Rights  relating to [***] or
                  relating to [***] which may come to its attention.

         (b)      [***] TECHNOLOGY.  Except as set forth below, [***] shall have
                  the first right,  but not the obligation,  in its own name, to
                  enforce Patent Rights  relating to [***]  Technology,  against
                  any Third  Party  suspected  of  infringing  a claim of such a
                  Patent  Right in the  Territory.  In the event [***] shall not
                  elect to enforce any Patent Right in the Territory, [***]. The
                  Party  [***] (the  "Enforcing  Party")  shall  have  exclusive
                  control  over the conduct of any such  proceedings,  including
                  the right to settle or compromise such proceedings  consistent
                  with [***],  provided,  however,  that the Enforcing Party may
                  not settle or  compromise  any such  action in a manner  which
                  diminishes the Patent Rights relating to any [***]  Technology
                  [***], Neurocrine [***] Program [***] the [***] or which would
                  impose any  financial  obligation  on the other Party  without
                  such other Party's consent. The expenses of any proceeding the
                  Enforcing  Party  initiates,  including  legal fees and costs,
                  shall be borne by the Enforcing Party,  provided however, that
                  the  other  Party  (the  "Non-enforcing  Party")  may elect to
                  [***]. The Non-enforcing  Party will co-operate fully with the
                  Enforcing  Party in such action upon request by the  Enforcing
                  Party. In the event the  Non-enforcing  Party [***], any award
                  or recovery paid to the Enforcing  Party by a Third Party as a
                  result of such patent infringement proceedings (whether by way
                  of  settlement  or  otherwise)  shall first be applied  toward
                  [***],  and from the  remainder,  if any,  [***] in the  event
                  [***] shall be the Enforcing Party shall [***] (or [***] shall
                  retain in the event  [***]  shall be the  Enforcing  Party) an
                  amount  equal  to the  [***].  Any  excess  shall  be for  the
                  Enforcing  Party.  In the  event the  Non-enforcing  Party has
                  [***],  such award or  recovery  paid to the  Enforcing  Party
                  shall first be applied  toward [***],  and the  remainder,  if
                  any, shall be [***].

         (c)      [***]. [***] shall have the sole right but not the obligation,
                  in its own  name and at its own  expense,  to  enforce  Patent
                  Rights relating to the [***] against any Third Party suspected
                  of infringing a claim of such a Patent Right.

11.6     INFRINGEMENT  DEFENSE.   [***]  shall  have  the  right,  but  not  the
         obligation,  to  defend  and  control  any  suit  against  any of [***]
         Affiliates  or  sublicensees,  alleging  infringement  of any patent or
         other  intellectual  property right of a Third Party [***]. [***] shall
         be  responsible  for the costs and expenses,  including  legal fees and
         costs,  associated with any suit or action. [***] will consult with one
         another  and  co-operate  in the defense of any such  action.  If [***]
         finds it  necessary  or  desirable to join [***] as a party to any such
         action, [***] will execute all papers and perform such acts as shall be
         reasonably required, at [***] expense. In the event the patent claim of
         any Third Party is held in a final and unappealable order of a court to
         be valid and  infringed,  or if [***] enters into a settlement  of such
         proceedings,  [***]  shall pay the full  amount of any  damages  and/or
         settlement amounts due to such Third Party.




11.7     HOLD HARMLESS.  The Parties hereby agree to hold each other harmless in
         respect of their good faith  activities  hereunder to file,  prosecute,
         maintain, enforce and defend Patent Rights under this Article 11.

                                 ARTICLE TWELVE

                                  MISCELLANEOUS

12.1     DISPUTES.  Other than  matters for decision by the Project  Teams,  for
         which Section 5.4 shall apply, and/or the Steering Committee, for which
         Section 4.4 shall apply, if the Parties are unable to resolve a dispute
         among them  informally,  GSK and  Neurocrine,  by written notice to the
         other,  may have such dispute  referred to their  respective  executive
         officers   designated   for   attempted   resolution   by  good   faith
         negotiations:

         FOR GSK:          [***]

         FOR NEUROCRINE:   [***]

         Any such dispute shall be submitted to the  above-designated  executive
         officers  no later than  thirty  (30) days  following  such  request by
         either  GSK  or  Neurocrine.  In the  event  the  designated  executive
         officers  are not able to resolve any such  dispute  within  sixty (60)
         days after submission of the dispute to such executive officers, GSK or
         Neurocrine,  as the case  may be,  may  pursue  whatever  measures  are
         legally  available to them to resolve such  dispute.  All  negotiations
         pursuant  to this  Section  12.1  shall be treated  as  compromise  and
         settlement  negotiations.  Nothing said or disclosed,  nor any document
         produced,  in the course of such  negotiations  which is not  otherwise
         independently  discoverable shall be offered or received as evidence or
         used for  impeachment or for any other purpose in any current or future
         arbitration or litigation.

12.2     ASSIGNMENT.  Neither this Agreement nor any interest hereunder shall be
         assignable  by either Party  without the prior  written  consent of the
         other Party,  except for  assignment  by operation of law in connection
         with a merger of a Party with or into  another  Person,  subject at all
         times  to  Section  10.4.  This  Agreement  shall be  binding  upon the
         successors and permitted assigns of the Parties and the name of a Party
         appearing  herein  shall be deemed to include the names of such Party's
         successors and permitted  assigns to the extent  necessary to carry out
         the intent of this  Agreement.  Any assignment  not in accordance  with
         this Section12.2 shall be void.

12.3     FURTHER ACTIONS. Each Party agrees to execute,  acknowledge and deliver
         such  further  instruments,  and to do all such other  acts,  as may be
         necessary or  appropriate in order to carry out the purposes and intent
         of the  Agreement.  In respect of the  reporting  of adverse  events to
         regulatory  authorities  in the  Territory  relating  to  Collaboration
         Products,  the Parties agree that such shall be performed in accordance
         with  appropriate  pharmacovigilance  terms  which  the  Parties  shall
         endeavor  to  draft  and  agree  in  good  faith,  and  append  to this
         Agreement,  at the  appropriate  time  after  mutual  execution  by the
         Parties hereof.

12.4     FORCE MAJEURE.  No Party shall be liable to the other Party for loss or
         damages or shall have any right to  terminate  this  Agreement  for any
         default  or delay  attributable  to any  Force  Majeure,  if the  Party
         affected shall give prompt notice of any such cause to the other Party.
         The Party  giving such notice  shall  thereupon be excused from such of
         its obligations hereunder as it is thereby disabled from performing for
         so long as it is so disabled,  provided,  however,  that such  affected
         Party  commences  and  continues  to use  its  Commercially  Reasonable
         Efforts to cure such cause.




12.5     CORRESPONDENCE AND NOTICES.

         (a)      ORDINARY NOTICES. Correspondence,  reports, documentation, and
                  any other  communication in writing between the Parties in the
                  course of ordinary  implementation  of this Agreement shall be
                  delivered  by hand,  sent by facsimile  transmission  (receipt
                  verified),  or by airmail to the employee or representative of
                  the  other  Party who is  designated  by such  other  Party to
                  receive such written communication.

         (b)      EXTRAORDINARY   NOTICES.   Extraordinary   notices  and  other
                  communications hereunder (including,  without limitation,  any
                  notice  of  force  majeure,  breach,  termination,  change  of
                  address,   exercise   of   rights  to   negotiate   additional
                  agreements,  etc.)  shall be in  writing  and  shall be deemed
                  given if delivered  personally  or by  facsimile  transmission
                  (receipt  verified),  mailed by registered  or certified  mail
                  (return  receipt  requested),  postage  prepaid,  or  sent  by
                  nationally  recognized express courier service, to the Parties
                  at the  following  addresses  (or at such other  address for a
                  Party as shall be specified by like notice, provided, however,
                  that notices of a change of address  shall be  effective  only
                  upon receipt thereof):

         All correspondence to GSK shall be addressed as follows:

         Glaxo Group Limited
         Glaxo Wellcome House
         Berkeley Avenue, Greenford,
         Middlesex
         England

         UK
         UB6 0NN

         Attention: General Counsel

         with copies to:

         GlaxoSmithKline plc
         New Horizons Court
         Brentford
         Middlesex
         England

         UK
         TW8 9EP

         Attention: Corporate Law

         SmithKline Beecham Corporation.
         c/o GlaxoSmithKline Corporation
         One Franklin Plaza
         Philadelphia

         PA 19101
         U.S.A

         Attention: Senior Vice President, WorldWide Business Development

         All correspondence to Neurocrine shall be addressed as follows:




         Neurocrine Biosciences, Inc.
         10555 Science Center Drive

         San Diego

         California

         U.S.A.
         92121

         Attention: Vice President, Business Development
         Cc: General Counsel and Secretary

12.6     AMENDMENT. No amendment, modification or supplement of any provision of
         this Agreement  shall be valid or effective  unless made in writing and
         signed by a duly authorized officer of each Party.

12.7     WAIVER.  No  provision  of the  Agreement  shall be  waived by any act,
         omission or knowledge  of a Party or its agents or employees  except by
         an instrument in writing expressly waiving such provision and signed by
         a duly authorized officer of the waiving Party.

12.8     COUNTERPARTS.   This  Agreement  may  be  executed  in  any  number  of
         counterparts, each of which need not contain the signature of more than
         one Party but all such counterparts taken together shall constitute one
         and the same agreement.

12.9     DESCRIPTIVE  HEADINGS.  The descriptive  headings of this Agreement are
         for convenience  only, and shall be of no force or effect in construing
         or interpreting any of the provisions of this Agreement.

12.10    GOVERNING LAW. This Agreement  shall be governed by and  interpreted in
         accordance  with the  substantive  laws of the [***] (without regard to
         conflict of law principles) and the Parties hereby submit to the [***].

12.11    SEVERABILITY.  In the event that any clause or portion  thereof in this
         Agreement   is  for  any  reason  held  to  be   invalid,   illegal  or
         unenforceable,  the same  shall not  affect  any other  portion of this
         Agreement, as it is the intent of the Parties that this Agreement shall
         be construed in such fashion as to maintain its existence, validity and
         enforceability to the greatest extent possible. In any such event, this
         Agreement  shall be construed as if such clause of portion  thereof had
         never  been  contained  in this  Agreement,  and there  shall be deemed
         substituted  therefore such provision as will most nearly carry out the
         intent of the Parties as  expressed  in this  Agreement  to the fullest
         extent  permitted  by  applicable  law  unless  doing so would have the
         effect of materially  altering the right and obligations of the Parties
         in which event this  Agreement  shall  terminate and all the rights and
         obligations  granted to the Parties  hereunder shall cease and be of no
         further force and effect.

12.12    ENTIRE  AGREEMENT  OF  THE  PARTIES.  This  Agreement  constitutes  and
         contains the complete,  final and exclusive understanding and agreement
         of  the  Parties  and  cancels  and   supersedes   any  and  all  prior
         negotiations, correspondence,  understandings and agreements including,
         without limitation, the Prior Agreement, whether oral or written, among
         the Parties respecting the subject matter hereof and thereof.

12.13    INDEPENDENT  CONTRACTORS.  The relationship  between GSK and Neurocrine
         created by this Agreement is one of independent contractors and neither
         Party shall have the power or  authority  to bind or obligate the other
         except as expressly set forth in this Agreement.

12.14    NO TRADEMARK  RIGHTS.  Expect as otherwise  provided herein,  no right,
         express or implied,  is granted by this  Agreement to use in any manner
         the name  "Neurocrine  Biosciences"  "GSK," or any other  trade name or
         trademark of the other Party or its  Affiliates in connection  with the
         performance of this Agreement.




12.15    ACCRUED  RIGHTS;  SURVIVING  OBLIGATIONS.  Unless  explicitly  provided
         otherwise in this Agreement, termination,  relinquishment or expiration
         of the  Agreement  for any  reason  shall be without  prejudice  to any
         rights  which  shall have  accrued to the benefit to any Party prior to
         such  termination,  relinquishment  or  expiration,  including  damages
         arising from any breach hereunder. Such termination,  relinquishment or
         expiration  shall not  relieve  any Party  from  obligations  which are
         expressly  indicated  to  survive  termination  or  expiration  of  the
         Agreement,  including,  without limitation, those obligations set forth
         in Section  2.2,  3.7,  Article 8, Article 9, Article 10 and Article 12
         hereof.

12.16    EXPORT.  Notwithstanding anything to the contrary set forth herein, all
         obligations of Neurocrine and GSK are subject to prior  compliance with
         United  States and foreign  export  regulations  and such other  United
         States and foreign laws and  regulations  as may be  applicable  and to
         obtaining all necessary  approvals  required by applicable  agencies of
         the  governments  of  the  United  States  and  foreign  jurisdictions.
         Neurocrine  and GSK  will  co-operate  with  one  another  and  provide
         assistance  to one  another  as  reasonably  necessary  to  obtain  any
         required approvals.







         IN WITNESS WHEREOF, duly authorized representatives of the Parties have
duly executed this Agreement to be effective as of the Effective Date.

NEUROCRINE BIOSCIENCES INC.

By:     /s/ Gary A. Lyons
Title: Chief Executive Officer & President

GLAXO GROUP LIMITED

By: /s/ Jean Pierre Garnier
Title: Director



                                    EXHIBITS

                                      [***]