EXHIBIT 10.5

                                LICENSE AGREEMENT


         THIS LICENSE AGREEMENT (the "Agreement")  effective as of April 4, 1996
(the "Effective  Date"), is entered by and between  CIBA-GEIGY  Limited, a Swiss
corporation,  with principal offices at Klybeckstrasse  141, Basel,  Switzerland
("Ciba"),  and  TherAtid,  Incorporated,  a  California  corporation,  having  a
principal  place  of  business  at 828  Eastbrook  Court,  Danville,  California
94506-1206   ("TherAtid").   All   references  to  TherAtid  shall  include  its
Affiliates.

                                    RECITALS

         A. Ciba is the sole and  exclusive  owner of certain  Patent Fights and
Know-How (as such terms are defined  below)  relating to [*] and analogs of such
compounds, and the use thereof, and related subject matter; and

         B. TherAtid desires to obtain an exclusive license to the Patent Rights
and  Know-How  and Ciba is willing to grant such a license to  TherAtid,  on the
terms and conditions herein.

         NOW, THEREFORE, Ciba and TherAtid agree as follows:

         1.       Definitions.

                  1.1 "Affiliate"  means,  with respect to each party, any legal
entity that  directly or  indirectly  controls,  is  controlled  by, or is under
common  control  with,  such party,  but only for so long as such control  shall
continue.  One entity shall be deemed to control  another  entity if such entity
has the power to direct or cause the direction of the  management or policies of
the other entity.

                  1.2 "Confidential  Information" shall mean (i) any proprietary
or  confidential  information or material in tangible form  disclosed  hereunder
that is marked as  "confidential"  at the time it is delivered to the  receiving
party,  or  (ii)  proprietary  or  confidential   information  disclosed  orally
hereunder which is identified as confidential or proprietary  when disclosed and
such  disclosure  of  confidential  information  is confirmed in writing  within
thirty (30) days by the disclosing party.

                  1.3 "Dominating  Patent" shall mean an unexpired  patent owned
or  controlled  by a third  party  that  has  not  been  invalidated  in a final
unappealed or unappealable judgment by a court or competent jurisdiction,  which
patent  covers  the  manufacture,   use  or  sale  of  Licensed  Products  under
circumstances  such  that  TherAtid  or its  sublicensees  have no  commercially
reasonable alternative to obtaining a royalty-bearing  license under such patent
in order to commercialize Licensed Products under this Agreement.

                  1.4 "Field"  shall mean all human and  veterinary  therapeutic
and prophylactic uses,  excluding use as a vaccine adjuvant and, with respect to
[*], excluding use for the treatment of asthma and other allergic diseases which
materially affect lung function. As used herein, "vaccine


                                       -1-






adjuvant"  shall mean a  substance  administered  with an antigen to enhance the
immune response to that antigen.

                  1.5 "Gross  Profit" shall mean Net Sales  amounts  received by
TherAtid for the  commercial  sale of Licensed  Products,  less (i) any taxes or
other  government  levies due with  regard to such  amounts,  (ii) any  expenses
incurred or accrued in connection with the manufacture,  use, marketing, sale or
other disposition of the Licensed Products, and (iii) general and administrative
expenses, reasonably allocated according to GAAP.

                  1.6 "Know-How" shall mean all ideas,  inventions,  data, trade
secrets,   instructions,   processes,   formulas,   chemical,   pharmacological,
toxicological, pharmaceutical, physical and analytical, manufacturing (including
but not  limited to  processes,  yields,  reagents  and  conditions  relating to
compound manufacture) data and information, owned or controlled by Ciba existing
as of the Effective Date,  which are not generally known during the term of this
Agreement,  and which are  sufficient  to allow a chemist  skilled in the art to
synthesize and manufacture Licensed Products, in liposome form or otherwise.

                  1.7 "Licensed Product" will mean any product which (i) but for
the license  granted  herein  would  infringe a Valid Claim in the country  such
product is made or sold, or (ii)  incorporates in material part or is made using
Know How.

                  1.8 "Net Sales"  means the gross  revenues  actually  received
from sales of  Licensed  Products  by TherAtid  and its  sublicensees,  less (i)
normal and customary rebates, and cash and trade discounts, actually taken, (ii)
sales,  use and/or other excise taxes or duties actually paid, (iii) the cost of
any  packages  and  packing,  if billed  separately,  (iv)  insurance  costs and
outbound  transportation  charges  prepaid or allowed,  (v) import and/or export
duties actually paid, and (vi) amounts allowed or credited due to returns.

                  1.9  "Patent  Rights"  means the  patents  listed on Exhibit A
hereto,   and   all   divisions,   continuations,   continuations-in-part,   and
substitutions  thereof.  Patent  Rights  shall also include any U.S. and foreign
patent  applications  or  patents  owned  by or  licensed  to Ciba  which  claim
inventions  relating  to the patent  rights  listed on Exhibit A,  conceived  or
reduced to practice in  connection  with research  sponsored by Ciba  including,
without  limitation,  in the  laboratory  of Dr.  Isaiah  J.  Fidler at the M.D.
Anderson Cancer Center at the University of Texas.

                  1.10  "Territory" means all countries of the world.

                  1.11  "Valid  Claim"  means  (i)  a  claim  of an  issued  and
unexpired  patent  included  within  the Patent  Rights  which has not been held
unenforceable  or invalid by a court or other  governmental  agency of competent
jurisdiction,  and which has not been  disclaimed  or  admitted to be invalid or
unenforceable  through  reissue  or  otherwise,  or  (ii) a claim  of a  pending
application within the Patent Rights.



                                       -2-






         2.       Grant.

                  Ciba  hereby  grants  to  TherAtid  an  exclusive,  worldwide,
royalty  bearing  license under the Patent  Rights,  with the fight to grant and
authorize  sub-licenses,  to make, have made, import, have imported,  use, sell,
offer for sale and otherwise  exploit the Licensed  Products in the Field in the
Territory.

         3.       Technical Assistance.

                  3.1  Delivery of Know-How.  Within  ninety (90) days after the
Effective  Date,  Ciba shall  deliver to TherAtid the Know-How in  electronic or
hard copy formats.

                  3.2  Technical  Assistance.  Until  six (6)  months  following
delivery of the Know- How pursuant to Section 3.1, at TherAtid's  request,  Ciba
shall  promptly  provide  TherAtid  or its  designee,  instruction,  advice  and
assistance  regarding  the practice of the Patent Rights and use of the KnowHow,
including  without  limitation,  relating to the manufacture of compounds within
the scope of the Patent  Rights.  Such  assistance  shall be  provided at a site
agreed by the parties, at agreed times.
[*]

                  3.3  Regulatory  Data  and  Filings.  On the  Effective  Date,
without additional cost, Ciba shall promptly provide TherAtid with access to and
the fight to use all  regulatory  filings  made by Ciba or its  Affiliates  with
respect to compounds  within the scope of the Patent  Rights,  together with the
underlying pre-clinical and clinical data. TherAtid and its sublicensees may use
and incorporate such filings and data in support of efforts to obtain regulatory
approval of Licensed Products worldwide.

                  3.4 Clinical  Trial Data. So far as it has the right to do so,
Ciba shall provide  TherAtid with all data from any clinical trials performed by
Ciba or its  Affiliates  with  respect to any  compound  within the scope of the
Patent  Rights  including  but not  limited  to  copies  of any  clinical  trial
agreement(s), protocols, case report forms and supporting documentation relating
to Phase II trials of such  compounds.  For those  data yet to become  available
from the ongoing Phase III clinical  trial with respect to the evaluation of [*]
for the  treatment  of  osteogenic  sarcoma in progress at the  National  Cancer
Institute of the U.S.  National  Institutes  of Health  ("NCI") on the Effective
Date,  Ciba will use all reasonable  endeavors to help TherAtid obtain access to
such data directly from the NCI,  including  making a written request to the NCI
to give TherAtid access to the data.

                  TherAtid and its  sublicensees  may use and  incorporate  such
data in  support  of  filings  for  regulatory  approval  of  Licensed  Products
worldwide.

                  3.5 Other  Intellectual  Property.  In the event that Ciba has
any option or other rights with respect to intellectual property relating to the
Field developed in connection with research sponsored by Ciba including, without
limitation,  in the  laboratory  of Dr.  Isaiah J.  Fidler at the M.D.  Anderson
Cancer  Center at the  University of Texas,  and the owner of such  intellectual
property

                                       -3-






refuses to  acknowledge  or  contests  such  rights,  Ciba shall use  reasonable
endeavors to perfect and enforce its interest in such intellectual property.

         4.       Consideration.

                  4.1 License  Fee.  Within  thirty  (30) days of the  Effective
Date, TherAtid shall pay to Ciba a license fee of [*].

                  4.2  Annual  Maintenance  Fee.  TherAtid  shall pay to Ciba an
annual  maintenance  fee  of [*]  during  the  period  commencing  on the  first
anniversary  of the Effective  Date and  continuing  until the initiation of any
Phase III clinical trial sponsored by TherAtid or a TherAtid sublicensee for any
Licensed  Product;  provided,  however,  that in the event  that any  additional
patients  are added to the Phase III  clinical  trial of [*] in  progress on the
Effective Date at the National Cancer Institute of the U.S. National  Institutes
of  Health,  TherAtid's  obligations  to pay the  annual  maintenance  fee shall
terminate on the date that the first such  patient is enrolled in such  clinical
trial.

                  4.3  Milestone  Payments.  Unless the  Agreement is terminated
earlier, following the first achievement by TherAtid of the following milestones
with respect to such first Licensed  Product for humans  incorporating  [*], and
the first Licensed Product for humans incorporating [*], TherAtid shall pay Ciba
one-time milestone payments, as follows:


                         Event                         Payment
                         -----                         -------
[*]



The  payments  set  forth  above  shall  be made  with  respect  to each of [*],
provided,  however,  if TherAtid ceases all development of [*] after having made
payments  with  respect  to the  applicable  compound  under  this  Section  4.3
following the accomplishment of any milestone  specified herein,  there shall be
no payment due upon the  accomplishment  of that same  milestone with respect to
any  subsequent  back-up  compound  after the first backup  compound  pursued by
TherAtid.  When  milestones  are  achieved  with  respect to such first  back-up
compound  which were not  previously  paid with respect to an earlier  compound,
such milestone payments shall be paid pursuant to this Section 4.3.

                  4.4 Royalties. In consideration of the license granted herein,
TherAtid shall pay to Ciba  royalties on Net Sales of Licensed  Products sold by
TherAtid on a Licensed Product-by- Licensed Product basis as set forth below:

                      4.4.1 Licensed  Products Sold by TherAtid.  TherAtid shall
pay to Ciba the  following  royalties  with  respect  to Net  Sales of  Licensed
Products sold by TherAtid, as follows:


                                       -4-







                                    (a)     [*]

                                    (b)     [*]

                      4.4.2  Licensed  Products Sold by  Sublicensees.  TherAtid
shall pay to Ciba the following  royalties with respect to Net Sales of Licensed
Products sold by sublicensees of TherAtid, as follows:

                                    (a)     [*]

                                    (b)     [*]

                  Notwithstanding  the above,  in the event that TherAtid has an
ownership interest, direct or indirect, [*] in any sublicensee,  royalties shall
be due with  respect  to sales of  Licensed  Products  at the rates set forth in
Section 4.2.1, rather than the rates set forth in this Section 4.2.2.

                      4.4.3  Royalty  Reduction.  The royalty rates set forth in
Sections  4.4.1  and  4.4.2  above  shall be  reduced  by [*] if the  applicable
Licensed  Products  are not within the scope of an issued Valid Claim within the
Patent Rights in the country such Licensed Products are either made or sold.

                  4.5 Commercial Impracticability. Notwithstanding the above, in
the event that TherAtid believes that the foregoing royalty rates would make the
sale of Licensed Products commercially  impracticable it may notify Ciba, and in
such  event the  parties  shall  negotiate  in good  faith a  reduction  in such
royalties; provided, the foregoing terms shall remain in effect until such other
terms are agreed in writing.

                  4.6 One Royalty. No more than one royalty payment shall be due
with respect to a sale of a particular  Licensed Product.  No multiple royalties
shall be payable because any Licensed Product,  or its manufacture,  sale or use
is  covered by more than one Valid  Claim.  No  royalty  shall be payable  under
Section 4.4 above with respect to sales of Licensed  Products among TherAtid and
its sublicensees, but shall be payable on sales of Licensed Products by TherAtid
or its sublicensees to third parties,  nor shall a royalty be payable under this
Article 4 with  respect to  Licensed  Products  distributed  for use in research
and/or  development,  in  clinical  trials  or as  promotional  samples  if such
promotional samples are provided without charge.

         5.       Payments.

                  5.1 Payment  Method.  All payments due hereunder shall be made
in  U.S.  dollars,  and  shall  be made by bank  wire  transfer  in  immediately
available funds to an account designated by Ciba. Any payments that are not paid
on the date such  payments are due under this  Agreement  shall bear interest to
the extent  permitted  by  applicable  law at the prime rate as  reported by the
Chase  Manhattan  Bank,  New York,  New York,  on the date such  payment  is due
calculated on the number


                                       -5-






of days such payment is  delinquent.  This Section 5.1 shall in no way limit any
other remedies available to Ciba.

                  5.2 Currency  Conversion.  If any currency conversion shall be
required  in  connection  with the  calculation  of  royalties  hereunder,  such
conversion  shall be made using the selling  exchange rate for conversion of the
foreign  currency  into U.S.  dollars,  quoted for current  "sell"  transactions
reported in The Wall Street  Journal for the last  business  day of the calendar
quarter to which such payment pertains.

                  5.3 Restrictions on Payment.  To the extent and as long as the
laws and/or regulations in force in any country prohibit the payment, conversion
or remittance of the royalties as hereby  contemplated,  TherAtid's  obligations
under  Article 5 may be  discharged  by the  deposit  thereof to the  account of
TherAtid,  or its designee,  in any commercial bank or trust company selected by
Ciba located in such country;  provided, that no infraction of law or regulation
occurs in making such deposit. If due to restrictions or prohibitions imposed by
national or international  authority,  payments cannot be made as aforesaid, the
parties shall consult with a view to finding a prompt and  acceptable  solution,
and TherAtid will,  from time to time,  deposit such monies as Ciba may lawfully
direct, at no additional out-of-pocket expense to TherAtid.

                  5.4 Withholding Taxes. All royalty amounts required to be paid
to Ciba pursuant to this  Agreement may be paid with  deduction for  withholding
for or on account of any taxes  (other than taxes  imposed on or measured by net
income) or similar governmental charge imposed by a juris diction other than the
United States ("Withholding  Taxes") to the extent Ciba or its successor has the
lawful  right to utilize  the  Withholding  Taxes paid by  TherAtid  as a credit
against Ciba's regular tax liability.  TherAtid shall provide Ciba a certificate
evidencing payment of any Withholding Taxes hereunder.

         6.       Reports and Records.

                  6.1 Royalty  Reports.  TherAtid  shall  deliver to Ciba [*] in
which  Licensed  Products are sold a written  report setting forth in reasonable
detail, on a country-by-country and Licensed  Product-by-Licensed Product basis,
the  calculation  of the royalties  payable to Ciba for such [*],  including the
Licensed Products sold in each country,  the Net Sales thereof,  and all amounts
received from sublicensees for sales of Licensed Products. Such reports shall be
Confidential Information of TherAtid subject to Article 8 herein.

                  6.2  Inspection  of  Books  and  Records.   TherAtid  and  its
sublicensees  shall  maintain  accurate  books  and  records  which  enable  the
calculation of royalties payable hereunder to be verified. TherAtid shall retain
the books  and  records  for each [*]  period  for  three  (3)  years  after the
submission of the  corresponding  report under  Section 6.1 hereof.  Upon thirty
(30) days prior notice to TherAtid and the  pertinent  sublicensee,  independent
accountants selected by Ciba, reasonably acceptable to TherAtid,  after entering
into a confidentiality agreement with TherAtid, may have access to the books and
records of TherAtid and its  sublicensees  to conduct a review or audit once per
calendar  year,  for the sole  purpose of verifying  the accuracy of  TherAtid's
payments and


                                       -6-






compliance  with this  Agreement.  The accounting firm shall report to Ciba only
whether there has been a royalty  underpayment  and, if so, the amount  thereof.
Such access shall be permitted  during  TherAtid's  normal business hours during
the  term of this  Agreement  and for two (2)  years  after  the  expiration  or
termination of this  Agreement.  Any such inspection or audit shall be at Ciba's
expense,  however, in the event an inspection reveals underpayment of [*] in any
audit period, TherAtid shall pay the costs of the inspection and promptly pay to
Ciba any  underpayment  with interest from the date such  amount(s) were due, at
the prime rate reported by the Chase Manhattan Bank, New York, New York.


         7.       Diligence.

                  7.1  Reasonable  Efforts.  TherAtid  agrees to use  reasonable
efforts  consistent with its prudent business judgment to diligently develop and
commercialize  the Patent  Rights and obtain such  approvals as may be necessary
for the sale of the  Licensed  Products  in the  United  States  and such  other
worldwide  markets as TherAtid elects to  commercialize  the Licensed  Products.
TherAtid  shall notify Ciba within  thirty (30) days after the first  commercial
sale of each Licensed Product.

                  7.2 Sublicense to Ciba. In the event that TherAtid  elects not
to commercialize  Licensed Products in a particular  country itself or through a
sublicensee  or a  distributor,  it shall notify Ciba.  In such event,  TherAtid
shall  negotiate a sublicense  with Ciba under the Patent  Rights and KnowHow in
such country on reasonable  terms  customary in the industry to be negotiated in
good faith by the parties.

         8.       Confidentiality; Publications.

                  8.1  Confidential  Information.   Unless  otherwise  expressly
provided for in this  Agreement,  both parties shall treat as  confidential  any
Know-How and any and all other  information  and data  received or derived under
this   Agreement   from  the  other  party  and  designated  as  proprietary  or
confidential at the time of disclosure ("Confidential  Information"),  and shall
not disclose any Confidential  Information  received from the other party to any
third  party  during the  Agreement  Period  and for five (5) years  thereafter,
except for information which:

                           (a) was  known to the  receiving  party  prior to the
disclosure by the other party as evidenced by written record or other proof;

                           (b) has become public  knowledge  through no fault of
the receiving party;

                           (c) has been  received from a third party who did not
acquire it directly or indirectly from the disclosing party;

                           (d)  was  independently  developed  by the  receiving
party prior to receipt from the disclosing  party,  as shown by  contemporaneous
written documentation;


                                       -7-






                           (e) needs to be disclosed to government officials for
purposes of obtaining registration of the Products; or

                           (f) is  compelled  to be  disclosed  in the course of
litigation  by a third  party,  provided  that the party  compelled to make such
disclosure  provides  the  other  party to this  Agreement  with  notice of such
compulsion  sufficiently  in advance of  disclosure  so as to provide such other
party a reasonable time period to seek a protective order.

                  8.2 Use and Disclosures.  Notwithstanding the above,  TherAtid
may  disclose  Confidential   Information  of  the  other  (i)  to  their  legal
representatives  and employees,  to  Affiliates,  to legal  representatives  and
employees of Affiliates,  and to  consultants,  to the extent such disclosure is
reasonably  necessary  to achieve the purposes of this  Agreement,  and provided
such  representatives,  employees and  consultants are covered by obligations of
confidentiality  with respect to such  information  no less stringent than those
set forth  herein;  (ii) in  connection  with the filing  and  support of patent
applications; (iii) as required by law or to comply with applicable governmental
regulations  or court  order or  otherwise  submit  information  to tax or other
governmental  authorities,  including the FDA and its foreign  counterparts,  or
(iv) to a sublicensee,  in confidence, in connection with a sublicense permitted
under this  Agreement;  provided  that if a party is  required  to make any such
disclosure of another party's Confidential Information, other than pursuant to a
confidentiality  agreement,  it will give reasonable advance notice to the other
party of such  disclosure and, save to the extent  inappropriate  in the case of
patent applications, will use its reasonable best efforts to secure confidential
treatment of such information in consultation  with the other party prior to its
disclosure  (whether through  protective  orders or otherwise) and disclose only
the minimum necessary to comply with such requirements.

                  8.3  Non-Disclosure.  The  existence  and  the  terms  of this
Agreement  shall not be  disclosed  by TherAtid or Ciba to any third party or be
published unless both parties expressly agree otherwise in writing.  The text of
any press release to be issued by TherAtid and/or Ciba concerning this Agreement
as well as the  precise  date and  timing of the press  release  shall be agreed
between the Parties in writing in advance, such agreement not to be unreasonably
withheld or delayed.  However, this restriction shall not apply to disclosure of
information  set forth in the form of an agreed  press  release,  which  will be
prepared in mutually  agreeable  format and  substance  following the closing of
this Agreement,  and to announcements  required by law or regulation except that
in such event the parties shall  coordinate to the extent  possible with respect
to the working of any such  announcement.  This  restriction  shall not apply to
disclosure  of this  Agreement  to certain  private  third  parties  such as the
shareholders of TherAtid,  investment bankers,  attorneys and other professional
consultants, and prospective investors in TherAtid.


                                       -8-






         9.       [*]

                  In the event [*] elects to [*] any Licensed  Product [*] shall
notify  [*]  and [*]  shall  [*]  such  Licensed  Product  [*] on  agreed  terms
reasonable and customary in the industry.  In such case, [*] shall have [*] from
the date it receives such written notice from [*] in which to notify [*] whether
[*] wishes [*]. After the expiration of such [*] period,  or any mutually agreed
upon extension thereof,  if, [*], the parties have [*] with respect to [*] shall
[*] with regard to such Licensed Product [*].

         10.      [*]

                  10.1 [*].  Within [*] from the Effective  Date,  [*] agrees to
deliver to [*] at no additional cost, [*] of such [*].

                  10.2  [*].  In  the  event  that  [*]  wishes  to  develop  or
commercialize  a  Licensed  Product  [*]  and  is  unable  [*]  on  commercially
reasonable  terms [*] request,  [*] agrees during the term of this  Agreement at
its discretion either (i) subject to Section [*] all Know-How  necessary [*]; or
(ii) to provide [*] with their  requirements of [*] at a transfer price equal to
[*] as  determined  in  accordance  with GAAP plus a  reasonable  profit  margin
customary in the trade.  In the event [*]  pursuant to option (ii)  hereof,  the
parties shall promptly enter into a [*] consistent with the preceding terms.

                  10.3  [*].  In  the  event  that  [*]  wishes  to  develop  or
commercialize  a  Licensed  Product  [*]  and  is  unable  [*]  on  commercially
reasonable  terms [*] request,  [*] agrees during the term of this  Agreement at
its discretion either (i) subject to Section [*] all Know-How  necessary [*]; or
(ii) to provide [*] with their  requirements of [*] at a transfer price equal to
[*], as  determined  in  accordance  with GAAP plus a reasonable  profit  margin
customary in the trade.  In the event [*]  pursuant to option (ii)  hereof,  the
parties shall promptly enter into a [*] consistent with the preceding terms.

                  10.4 [*].  In the event  that [*]  elects to [*]  pursuant  to
either Section [*] shall provide [*] with at least [*], and shall deliver to [*]
all  Know-How  relating to the [*] at least [*] prior to the date that [*] shall
cease to provide the applicable [*]. In such event, the parties shall assist and
cooperate  with  each  other  in  order  that  [*] may  initiate  [*] as soon as
practicable,  and shall take such  actions as are  appropriate  to achieve  such
goal.

         11.      Representations and Warranties.

                  11.1  Ciba   represents   and  warrants  that:  (i)  it  is  a
corporation duly organized  validly existing and in good standing under the laws
of Switzerland;  (ii) the execution,  delivery and performance of this Agreement
have been duly authorized by all necessary corporate action on the part of Ciba;
(iii) Ciba and Ciba-Geigy  Corporation are the sole and exclusive  owners of all
right,  title and interest in the Patent Rights and the Know-How;  (iv) Ciba has
the fight to grant the rights and licenses granted herein; (v) the Patent Rights
and Know-How are free and clear of any lien,


                                       -9-






encumbrance,  security  interest  or  restriction  on  license;  (vi) it has not
previously  granted,  and will not grant during the term of this Agreement,  any
right,  license or  interest  in or to the  Patent  Rights or  Know-How,  or any
portion thereof, inconsistent with the license granted to TherAtid herein; (vii)
there are no threatened or pending  actions,  suits,  investigations,  claims or
proceedings in any way relating to the Patent Rights or Know-How; and (viii) the
practice  by  TherAtid  or its  sublicensees  of the Patent  Rights or  Know-How
licensed  herein  does not and shall not  require a license,  additional  to the
license  hereby  granted,   under  any  other  intellectual  property  owned  or
controlled by Ciba or its Affiliates.

                  11.2 TherAtid.  TherAtid  represents and warrants that: (i) it
is a corporation duly organized  validly existing and in good standing under the
laws  of  the  State  of  California;  and  (ii)  the  execution,  delivery  and
performance  of this  Agreement  have  been  duly  authorized  by all  necessary
corporate action on the part of TherAtid.

         12.      Patent Prosecution and Enforcement.

                  12.1 Ciba's Responsibilities. Ciba shall, at its sole expense,
have the  initial  right and  obligation  to control  the  preparation,  filing,
prosecution  and  maintenance  of the  Patent  Rights,  and  any  interferences,
re-examinations,  reissues and oppositions  proceeding  relating thereto,  using
patent  counsel of its choice.  Ciba shall consult with  TherAtid  regarding the
conduct of all such activities,  by providing TherAtid a reasonable  opportunity
to review and comment on all proposed  submissions  to any patent  office before
submittal,  and  provided  further  that Ciba  shall  keep  TherAtid  reasonably
informed as to the status of such  patent  applications  by  promptly  providing
TherAtid copies of all communications  relating to such patent applications that
are received from any patent office.

                  12.2 Ciba Failure to Prosecute.  Ciba may elect on ninety (90)
days  prior  notice  to  TherAtid  to  discontinue  prosecution  of  any  patent
applications  within the Patent  Rights or the  conduct of any  activities  with
respect to the patent  applications  or patents subject to Section 12. 1. In the
event  Ciba  declines  to file or having  filed  fails to further  prosecute  or
maintain  any patent  applications  or patents,  or conduct  any  interferences,
re-examinations,  reissues or oppositions, then TherAtid shall have the right to
prepare,  file,  prosecute and maintain such patent  applications and patents in
such countries worldwide it deems appropriate, and conduct any interferences, re
examinations,  reissues or oppositions, at its sole expense using patent counsel
of its choice. TherAtid may credit any expenses incurred in connection with such
activities  set  forth in this  Section  12.2  against  any  royalties  due Ciba
pursuant to Article 4.

                  12.3 Copies.  Upon request by  TherAtid,  Ciba shall  promptly
provide to TherAtid a copy of any patent  applications  within the Patent Rights
filed  by Ciba or its  Affiliates  during  the  term of this  Agreement  and all
material  documents  received from or sent to any patent office relating thereto
which relate to the scope, term, maintenance,  validity or enforceability of any
of the Patent Rights, or any challenge to or change to any of the preceding.

                  12.4  Enforcement.  If either  party  becomes  aware  that any
Patent  Rights are being or have been  infringed by any third party,  such party
shall promptly notify the other party hereto in



                                      -10-







writing describing the facts relating thereto in reasonable  detail.  Ciba shall
have the initial  right,  but not the  obligation,  to institute,  prosecute and
control  any action,  suit or  proceeding  (an  "Action")  with  respect to such
infringement,  including any declaratory judgment action, at its expense,  using
counsel of its choice.  In the event Ciba fails to initiate or defend any Action
involving the Patent  Rights  within one hundred  eighty (180) days of receiving
notice of any alleged  infringement,  TherAtid shall have the fight, but not the
obligation,  to initiate  and control such an Action,  and Ciba shall  cooperate
with TherAtid in connection with any such Action.  Any amounts recovered in such
Action  shall be used  first to  reimburse  TherAtid  and Ciba for any costs and
expenses  incurred in  connection  with such Action  (including  attorneys'  and
experts'  reasonable  fees),  and any  remainder  shall be divided  between  the
parties with Ciba receiving [*] and TherAtid [*].

                  12.5 Third Party  Royalty  Offset.  In the event that TherAtid
enters  into a  license  agreement  with  any  third  party  with  respect  to a
Dominating   Patent  or  to  avoid  or  settle  a  claim  of   infringement   or
misappropriation of any intellectual property fight made by such third party due
to TherAtid's  practice of the Patent  Rights,  TherAtid may offset any payments
made in accordance  with such license  agreements  against any amounts owed Ciba
pursuant to Article 4 hereof, up to a [*] of the amounts due thereunder.

                  12.6 Patent Term Extensions. With respect to any patent within
the Patent Rights, Ciba will designate TherAtid or its designee as its agent for
obtaining an extension of such patent or governmental  equivalent  which extends
the  exclusivity  of any of the patent  subject  matter  where  available in any
country in the world or if not feasible,  at TherAtid's option,  permit TherAtid
to file in Ciba's name or diligently  obtain such  extension for TherAtid or its
sublicensee(s),  at TherAtid's  expense.  Furthermore,  Ciba and its  Affiliates
agree  to  provide  reasonable   assistance  to  facilitate  TherAtid's  or  its
sublicensees' efforts to obtain any extension.

         13.      Arbitration.

                  Ciba and  TherAtid  agree  that  any  dispute  or  controversy
arising out of, in relation to, or in  connection  with this  Agreement,  or the
validity, enforceability,  construction, performance or breach thereof, shall be
settled by binding  arbitration in New York, New York, United States of America,
under the  then-current  Licensing  Agreement Rules of the American  Arbitration
Association by one (1) arbitrator  appointed in accordance with such Rules.  The
arbitrators  shall  determine  what  discovery  will be permitted,  based on the
principle  of  limiting  the cost and time  which  the  parties  must  expend on
discovery;  provided,  the arbitrators  shall permit such discovery as they deem
necessary to achieve an equitable  resolution of the dispute.  Such  proceedings
shall be conducted in English, and any written evidence originally in a language
other than English shall be submitted in an English  translation  accompanied by
the original or a true copy thereof.  The decision  and/or award rendered by the
arbitrator shall be written,  final and non-appealable and may be entered in any
court of competent jurisdiction. In the event that in any arbitration instituted
pursuant  to  Section  15.2,  the  arbitrator  determines  that there has been a
material breach of the Agreement,  at the option of the non breaching party, the
arbitrator shall direct that the Agreement be terminated effective  immediately.
The parties agree that,  any provision of applicable law  notwithstanding,  they
will not request, and the arbitrator shall have no authority to award,  punitive
or exemplary damages against any party. The


                                      -11-





costs  of  any  arbitration,  including  administrative  fees  and  fees  of the
arbitrator,  shall be shared  equally by the parties.  Each party shall bear the
cost of its own attorneys' fees and expert fees.

         14.      Indemnification.

                  14.1  TherAtid.  TherAtid  shall  indemnify,  defend  and hold
harmless Ciba and its  directors,  officers,  employees and agents (each a "Ciba
Indemnitee") from and against any and all liabilities, damages, losses, costs or
expenses  (including  reasonable  attorneys  and  professional  fees  and  other
expenses of litigation  and/or  arbitration) (a "Liability")  resulting from any
claim,  suit or proceeding  brought by a third party against a Ciba  Indemnitee,
arising out of or in connection with (i) any  misrepresentation  with regard to,
or breach of any of the  representations and warranties of TherAtid set forth in
Section 11.2, or (ii) the development,  manufacture, use, sale or consumption of
any  Licensed  Product by  TherAtid  or its  sublicensees,  except to the extent
caused by the negligence or willful misconduct of Ciba.

                  14.2 Ciba.  Ciba  shall  indemnify,  defend and hold  harmless
TherAtid and its  directors,  officers,  employees  and agents (each a "TherAtid
Indemnitee") from and against any and all liabilities, damages, losses, costs or
expenses  (including  reasonable  attorneys'  and  professional  fees and  other
expenses of litigation  and/or  arbitration) (a "Liability")  resulting from any
claim,  suit  or  proceeding  brought  by  a  third  party  against  a  TherAtid
Indemnitee,  arising out of or in  connection  with any  misrepresentation  with
regard to, or breach of any of, the  representations  and warranties of Ciba set
forth in Section 1.1.

                  14.3  Procedure.  In the event that any Indemnitee  intends to
claim  indemnification  under this Article 14 it shall promptly notify the other
party in writing of such alleged  Liability.  The indemnifying  party shall have
the right to  control  the  defense  thereof.  The  affected  Indemnitees  shall
cooperate fully with the indemnifying party and its legal representatives in the
investigation  and  conduct of any  Liability  covered by this  Article  14. The
Indemnitee  shall not, except at its own cost,  voluntarily  make any payment or
incur any expense  with  respect to any claim,  suit or  Liability,  or make any
admission of liability or attempt to settle any claim  without the prior written
consent of the  indemnifying  party,  which such party  shall not be required to
give.

         15.      Term and Termination.

                  15.1  The  term  of  this  Agreement  shall  commence  on  the
Effective  Date, and unless earlier  terminated as provided in Article 15, shall
continue  in full  force  and  effect  on a  country-by-  country  and  Licensed
Product-by-Licensed  Product basis until there are no remaining  royalty payment
obligations  in a  country,  at which  time the  Agreement  shall  expire in its
entirety in such country. Notwithstanding the above, upon the expiration of this
Agreement  in any country,  TherAtid  shall have a  non-exclusive,  irrevocable,
fully paid-up right and license to use and exploit the Know-How.

                  15.2 If either party materially  breaches this Agreement,  the
other party may elect to give the breaching party written notice  describing the
alleged  breach.  If the breaching  party has not cured such breach within sixty
(60) days after receipt of such notice, the notifying party will be


                                      -12-







entitled,  in addition to any other rights it may have under this Agreement,  to
terminate this Agreement  effective  immediately;  provided,  however, if either
party receives notification from the other of a material breach and if the party
alleged to be in default  notifies the other party in writing within thirty (30)
days of receipt of such default  notice that it disputes  the asserted  default,
the matter will be submitted to non-binding  mediation and no termination  shall
become effective prior to the completion of such mediation.

                  15.3  Termination for  Insolvency.  Either party may terminate
this  Agreement if the other  becomes the subject of a voluntary or  involuntary
petition in bankruptcy or any proceeding  relating to insolvency,  receivership,
liquidation,  or  composition  or the benefit of creditors,  if that petition or
proceeding is not dismissed with prejudice within sixty (60) days after filing.

                  15.4  Permissive  Termination.  TherAtid  may  terminate  this
Agreement with respect to any country or any patent application or patent within
the Patent rights with sixty (60) days written notice to Ciba.

                  15.5     Effect of Termination.

                           (a) Accrued  Rights and  Obligations.  Termination of
this  Agreement  for any reason  shall not  release  any party  hereto  from any
liability  which,  at the time of such  termination,  has already accrued to the
other party or which is attributable to a period prior to such termination,  nor
preclude  either  party  from  pursuing  any  rights  and  remedies  it may have
hereunder  or at law or in equity  which  accrued  or are  based  upon any event
occurring prior to such termination.

                           (b) Return of Materials. Upon any termination of this
Agreement,  each party shall promptly return to the other party all Confidential
Information  received  from the  other  party  (except  one copy of which may be
retained for archival purposes).

                           (c) Stock on Hand.  In the event  this  Agreement  is
terminated for any reason,  TherAtid and its Affiliates and  sublicensees  shall
have the right to sell or otherwise dispose of the stock of any Licensed Product
subject to this Agreement then on hand, subject to Articles 4 and 5.

                           (d) Sublicensees.  In the event of any termination of
this  Agreement any  sublicensees  granted by TherAtid shall remain in force and
effect and shall be assigned by TherAtid to Ciba,  provided,  however,  that the
financial terms of such sublicenses  shall be no less favorable to Ciba than the
terms of this Agreement.

                  15.6  Survival.  Sections 15.5 and 15.6, and Articles 5, 6, 8,
9,  11,  13,  14 and 16 of this  Agreement  shall  survive  termination  of this
Agreement for any reason.


                                      -13-






         16.      Miscellaneous.

                  16.1 Governing  Law. This  Agreement  shall be governed by and
construed  in  accordance  with  the  laws of the  State  of New  York,  without
reference to principles of conflicts of laws.

                  16.2 Independent Contractors.  The relationship of the parties
hereto is that of independent contractors.  The parties hereto are not deemed to
be agents, partners or joint venturers of the others for any purpose as a result
of this Agreement or the transactions contemplated thereby.

                  16.3  Assignment.  Neither party may assign this  Agreement or
the supply  agreement  without  the prior  written  consent of the other,  which
consent shall not be  unreasonably  withheld;  provided,  however,  TherAtid may
assign this Agreement in connection with a transfer of all or substantially  all
of its assets relating to the agreements,  whether by sale, merger, operation of
law or otherwise.  This Agreement shall be binding upon and inure to the benefit
of the parties and their successors and assigns.

                  16.4 Right to Develop Independently. Nothing in this Agreement
will impair  TherAtid's right to  independently  acquire,  license,  develop for
itself,  or have others  develop for it,  intellectual  property and  technology
performing similar functions as the Patent Rights and Know- How or to market and
distribute  Licensed  Products  based on such other  intellectual  property  and
technology.

                  16.5 Notices. Any required notices hereunder shall be given in
writing by certified mail or overnight  express  delivery service at the address
of each party  below,  or to such other  address as either party may indicate on
its behalf by written  notice.  Notice shall be deemed served when delivered or,
if delivery is not  accomplished by reason or some fault of the addressee,  when
tendered.

                  If to Ciba:               Ciba-Geigy Limited
                                            Pharma Licensing
                                            Klybeckstrasse 141
                                            4002 Basel
                                            Switzerland
                                            Attention:

                  If to TherAtid:           TherAtid, Incorporated
                                            828 Eastbrook Court
                                            Danville, California 94506-1206
                                            Attention: Chief Executive Officer

                  16.6  Force  Majeure.  Neither  party  shall  lose any  rights
hereunder  or be liable to the other  party for  damages or losses  (except  for
payment  obligations)  on account of failure of  performance  by the  defaulting
party if the failure is occasioned by war, strike, fire, Act of God, earthquake,
flood, lockout, embargo, governmental acts or orders or restrictions, failure of
suppliers,

                                      -14-






or any other reason where  failure to perform is beyond the  reasonable  control
and not  caused by the  negligence,  intentional  conduct or  misconduct  of the
nonperforming  party and the  nonperforming  party has  exerted  all  reasonable
efforts to avoid or remedy such force  majeure;  provided,  however,  that in no
event shall a party be required to settle any labor dispute or disturbance.

                  16.7  Compliance  with Laws.  Each party shall  furnish to the
other  party any  information  related to the subject  matter of this  Agreement
requested  or required by that party  during the term of this  Agreement  or any
extensions  hereof to enable that party to comply with the  requirements  of any
U.S. or foreign federal state and/or government agency.

                  16.8 LIMITATION OF LIABILITY. NEITHER PARTY SHALL BE LIABLE TO
THE OTHER FOR ANY SPECIAL, CONSEQUENTIAL, INCIDENTAL OR INDIRECT DAMAGES ARISING
OUT OF THE  PERFORMANCE OF THIS AGREEMENT,  HOWEVER CAUSED,  UNDER ANY THEORY OF
LIABILITY.

                  16.9 Further  Assurances.  At any time or from time to time on
and after the date of this Agreement,  Ciba shall at the request of TherAtid (i)
deliver to TherAtid such records,  data or other  documents  consistent with the
provisions  of  this  Agreement,  (ii)  execute,  and  deliver  or  cause  to be
delivered,  all such consents,  documents or further  instruments of transfer or
license,  and (iii) take or cause to be taken all such actions,  as TherAtid may
reasonably  deem necessary or desirable in order for TherAtid to obtain the full
benefits of this Agreement and the transactions contemplated hereby.

                  16.10  Severability.  In the event that any provisions of this
Agreement are determined to be invalid or  unenforceable by a court of competent
jurisdiction,  the  remainder  of the  Agreement  shall remain in full force and
effect  without  said  provision.  The parties  shall in good faith  negotiate a
substitute  clause for any provision  declared invalid or  unenforceable,  which
shall most  nearly  approximate  the  intent of the  parties  in  entering  this
Agreement;  provided,  if the parties  are unable to agree on such a  substitute
clause and the deletion of the  provision  held invalid or  unenforceable  would
produce material adverse financial  consequences for one party, such party shall
have the fight to terminate  the  Agreement  with one hundred  eighty (180) days
notice.

                  16.11 Waiver.  The failure of a party to enforce any provision
of the  Agreement  shall  not be  construed  to be a waiver of the right of such
party to thereafter enforce that provision or any other provision or right.

                  16.12 Entire Agreement;  Amendment.  This Agreement including,
its Exhibits,  sets forth the entire agreement and  understanding of the parties
with respect to the subject matter hereof, and supersedes all prior discussions,
agreements and writings in relating thereto.  This Agreement may not be altered,
amended or modified in any way except by a writing signed by both parties.

                  16.13  Counterparts.  This  Agreement  may be  executed in two
counterparts, each of which shall be deemed an original and which together shall
constitute one instrument.


                                      -15-






         IN WITNESS  WHEREOF,  Ciba and TherAtid have executed this Agreement by
their respective duty authorized representatives.


CIBA-GEIGY LIMITED                             THERATID, INCORPORATED


By: /s/ DR. E. SCHWEIZER                       By: /s/ ANTHONY E. MAIDA III
   -----------------------------------            ------------------------------
Print Name: Dr. E. Schweizer                   Print Name: Anthony E. Maida III
           ---------------------------                    ----------------------
Title: Chief Scientific and Technical          Title: Chief Executive Officer
      --------------------------------               ---------------------------
       Adviser


By: /s/ R.E. WALKER
   -------------------------
Print Name: R.E. Walker
           -----------------
Title: Division Counsel
      ----------------------


EXHIBIT A: PATENT RIGHTS


                                      -16-








                                    EXHIBIT A

                                     Part I

                             Patents relating to [*]








                    Appendix A: Patent rights by Case 4-12450
                    -----------------------------------------



Country                      Patent No.                     Patent Expiry
- -------                      ----------                     -------------
[*]                          [*]                            [*]
Austria                      25495                          July 25, 2000
Australia                    541147                         July 25, 2000
Belgium                      25495                          July 25, 2000
Bermuda                      28                             July 25, 2000
Canada                       1183129                        Feb. 26, 2002
Cyprus                       1381                           July 25, 2000
Czech Republic               276965                         July 25, 2000
Denmark                      161025                         July 25, 2000
Germany                      25495                          July 25, 2000
Finland                      75578                          July 21, 2000
France                       25495                          July 25, 2000
Great Britain                25495                          July 25, 2000
Hong Kong                    857/87                         July 25, 2000
Hungary                      188861                         July 24, 2000
Ireland                      50145                          July 24, 2000
Israel                       60676                          July 24, 2000
Italy                        25495                          July 25, 2000
Japan                        1507734                        July 25, 2000
Kenya                        P3723                          July 25, 2000
Luxembourg                   25495                          July 25, 2000
Malaya                       554/87                         July 25, 2000
[*]                          [*]                            [*]
Netherlands                  25495                          July 25, 2000
New Zealand                  194432                         July 24, 2000
Norway                       157177                         July 22, 2000
Portugal                     71607                          June 4, 1996
Russia                       1277905                        July 24, 2000
Russia                       1277906                        July 24, 2000
Sabah                        405/87                         July 25, 2000
Sarawak                      3237                           July 25, 2000
Singapore                    381/87                         July 25, 2000
South Africa                 4487/80                        July 24, 2000
Spain                        493633                         Oct. 27, 2000
Sweden                       25495                          July 25, 2000
Switzerland                  25495                          July 25, 2000
USA                          4406890                        Sept. 27, 2000
Venezuela                    49953                          April 29, 2002








                    Appendix B: Patent rights by Case 4-14026
                    -----------------------------------------


Country                     Patent No.                    Patent Expiry
- -------                     ----------                    -------------
Australia                   566879                        July 22, 2003
Belgium                     897359                        July 25, 2003
France                      102319                        July 18, 2003
Great Britain               102319                        July 18, 2003
Hong Kong                   798/90                        July 18, 2003
Ireland                     55793                         July 22, 2003
Israel                      69294                         July 21, 2003
Italy                       1168778                       July 22, 2003
Luxembourg                  102319                        July 18, 2003
Netherlands                 102319                        July 18, 2003
New Zealand                 205000                        July 22, 2003
[*]                         [*]                           [*]
Singapore                   779/89                        July 18, 2003
South Africa                5360/83                       July 22, 2003
Sweden                      102319                        July 18, 2003
Switzerland                 102319                        July 18, 2003
USA                         5189017                       Feb. 23, 2010
USA                         5334583                       Feb. 23, 2010







                    Appendix C: Patent rights by Case 4-15115
                    -----------------------------------------


Country                     Patent No.                    Patent Expiry
- -------                     ----------                    -------------
Austria                     178624                        Oct. 14, 2005
Australia                   590221                        Oct. 15, 2005
Belgium                     178624                        Oct. 14, 2005
[*]                         [*]                           [*]
Canada                      1260393                       Sept. 26, 2006
Denmark                     165220                        Oct. 15, 2005
Germany                     178624                        Oct. 14, 2005
Finland                     86371                         Oct. 14, 2005
France                      178624                        Oct. 14, 2005
Gibraltar                   389                           Oct. 14, 2005
Great Britain               178624                        Oct. 14, 2005
Greece                      852492                        Oct. 15, 2000
Hong Kong                   1357/94                       Oct. 14, 2005
Hungary                     198128                        Oct. 15, 2005
Ireland                     58143                         Oct. 14, 2005
Israel                      76700                         Oct. 14, 2005
Italy                       178624                        Oct. 14, 2005
[*]                         [*]                           [*]
Japan                       1897352                       Oct. 16, 2005
[*]                         [*]                           [*]
Korea (South)               28375                         Oct. 16, 2000
Luxembourg                  178624                        Oct. 14, 2005
Netherlands                 178624                        Oct. 14, 2005
New Zealand                 213828                        Oct. 15, 2005
Norway                      171443                        Oct. 15, 2005
Pakistan                    129986                        Oct. 10, 2001
Philippines                 22978                         Feb. 24, 2006
Portugal                    81298                         Aug. 31, 2002
Singapore                   898/93                        Oct. 14, 2005
South Africa                7888/85                       Oct. 15, 2005
Spain                       547889                        Aug. 26, 2006
Sweden                      178624                        Oct. 14, 2005
Switzerland                 178624                        Oct. 14, 2005
Taiwan                      25805                         Oct. 15, 2001
USA                         4971802                       Nov. 20, 2007









                    Appendix D: Patent rights by Case 4-16897
                    -----------------------------------------


Country                      Patent No.                       Patent Expiry
- -------                      ----------                       -------------
Australia                    623876                           Jan. 31, 2009
Austria                      329609                           Feb. 6, 2009
Belgium                      329609                           Feb. 6, 2009
Canada                       1336578                          Aug. 8, 2012
[*]                          [*]                              [*]
France                       329609                           Feb. 6, 2009
Germany                      329609                           Feb. 6, 2009
Great Britain                329609                           Feb. 10, 2009
Ireland                      63493                            Feb. 10, 2009
Israel                       89248                            Feb. 10, 2009
Italy                        329609                           Feb. 6, 2009
[*]                          [*]                              [*]
[*]                          [*]                              [*]
Luxembourg                   329609                           Feb. 6, 2009
Netherlands                  329609                           Feb. 6, 2009
New Zealand                  227944                           Feb. 10, 2009
Philippines                  26919                            Dec. 3, 2009
South Africa                 1053/89                          Feb. 10, 2009
Sweden                       329609                           Feb. 6, 2009
Switzerland                  329609                           Feb. 6, 2009
USA                          5137720                          Aug. 11, 2009







                    Appendix E: Patent Rights by Case 4-17454
                    -----------------------------------------


Country                      Patent No.                       Patent Expiry
USA                          4,994,440                        Feb. 13, 2009



Note:  Ciba-Geigy  Corporation had a Research  Collaboration  Agreement with the
Roswell Park  Memorial  Institute  which it has not been possible to track down,
and consequently although the above-mentioned  patent is in the name of Ciba, it
may be that,  in line with other  Agreements  between  Ciba,  the  Roswell  Park
Memorial  Institute and Health Research,  Inc. concluded at about the same time,
some  royalty  payment  of the order of 1% to 5%  (taking  into  account  either
party's  contribution to the development)  would have to be made to Roswell Park
for exploitation of this patent for the indication of renal cell carcinoma,  the
precise amount to be negotiated prior to commercialization.










                                    EXHIBIT A

                                     Part II

                             Patents relating to [*]






                    Appendix A: Patent rights by Case 4-18903
 (based on Swiss priority patent application no. 3776/91-2, filed Dec. 19, 1991)


Country                        Patent No.                 Patent Expiry
- -------                        ----------                 -------------
[*]                            [*]                        [*]
New Zealand                    245507                     Dec. 17, 2012
Portugal                       548024                     Dec. 11, 2012
[*]                            [*]                        [*]
South Africa                   9831/92                    Dec. 18, 2012
[*]                            [*]                        [*]
USA                            5342977                    Dec. 17, 2012