1
                                                                   EXHIBIT 10.74

                                               CONFIDENTIAL TREATMENT REQUESTED



                 LICENSE AND RESEARCH AND DEVELOPMENT AGREEMENT

                                     BETWEEN

         REVOTAR BIOPHARMACEUTICALS AG, registered in the commercial register of
         the local court of Charlottenburg under HRB 72702 represented by its
         Managing Director, Mr David B. McWilliams

                                                    - referred to as "Revotar" -

and

         TEXAS BIOTECHNOLOGY CORPORATION,
         represented by its President and C.E.O. David B. McWilliams,
         7000 Fannin, USA TX 77030 Houston,

                                                        - referred to as "TBC" -




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                                      -1-

                                Table of Contents



                                                                      Page
                                                                      ----
                                                                   
   1. DEFINITIONS.......................................................5
   1.1..................................................................5
   1.2..................................................................5
   1.3..................................................................5
   1.4..................................................................5
   1.5..................................................................5
   1.6..................................................................6
   1.7..................................................................6
   1.8..................................................................6
   1.9..................................................................6
   1.10.................................................................6
   1.11.................................................................6
   1.12.................................................................7
   1.13.................................................................7
   1.14.................................................................7
   1.15.................................................................7
   1.16.................................................................7
   1.17.................................................................7
   1.18.................................................................7
   1.19.................................................................8
   1.20.................................................................8
   1.21.................................................................8
   1.22.................................................................8
   1.23.................................................................8
   1.24.................................................................8
   1.25.................................................................9
   1.26.................................................................9
   1.27.................................................................9
   1.28.................................................................9



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                                                                      Page
                                                                      ----
                                                                   
   1.29.................................................................9
   1.30.................................................................9
   1.31.................................................................9
   1.32.................................................................9
   1.33.................................................................9
   2. LICENSE TO REVOTAR...............................................10
   2.1 EXCLUSIVE LICENSE...............................................10
   3.  DEVELOPMENT PROGRAM.............................................12
   3.1    GOALS........................................................12
   3.2    PROGRAM ADMINISTRATION.......................................13
   3.3    PERFORMANCE OF SERVICES......................................15
   3.4    RECORDS AND DATA.............................................16
   3.5    VISIT OF FACILITIES..........................................16
   4.  PAYMENTS AND REPORTS............................................17
   4.1    DEVELOPMENT FUNDING..........................................17
   4.2    ROYALTIES AND PROFIT SHARING.................................17
   4.3    AUDIT RIGHTS.................................................19
   4.4    PAYMENT CURRENCY.............................................20
   4.5    PAYMENT MECHANICS............................................20
  50    COMMERCIALIZATION..............................................20
   5.1    TBC TO MANUFACTURE...........................................20
   5.2    REVOTAR TO SELL IN TERRITORY.................................21
  60    TBC REPRESENTATIONS AND WARRANTIES.............................22
   6.1    NO THIRD PARTY AGREEMENTS....................................22
   6.2    NO THIRD PARTY RIGHTS........................................22
  70    PROPRIETARY RIGHTS.............................................22
   7.1    IMPROVEMENTS.................................................22
   7.2    PATENT PROSECUTION AND MAINTENANCE...........................23
   7.3    THIRD PARTY CLAIM OF INFRINGEMENT............................24
   7.4    INFRINGEMENT BY THIRD PARTIES................................25



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                                                                      Page
                                                                      ----
                                                                   

  80    CONFIDENTIALITY................................................26
   8.1    GENERAL......................................................26
   8.2    DISCLOSURE OF AGREEMENT......................................27
  90    INDEMNIFICATION................................................27
   9.1    MUTUAL RIGHT TO INDEMNIFICATION..............................27
   9.2    PROCEDURE....................................................28
   9.3    PRODUCT LIABILITY INSURANCE..................................28
  100   TERM AND TERMINATION...........................................29
   10.1   LICENSE TERM.................................................29
   10.2   TERMINATION FOR BREACH.......................................29
   10.3   TERMINATION FOR FAILURE TO PROCEED...........................30
   10.4   SURVIVAL OF OBLIGATIONS......................................30
  110   MISCELLANEOUS..................................................31
   11.1   FORCE MAJEURE................................................31
   11.2   RELATIONSHIP OF THE PARTIES..................................31
   11.3   NOTICES......................................................31
   11.4   SUCCESSORS AND ASSIGNS.......................................32
   11.5   AMENDMENTS AND WAIVERS.......................................32
   11.6   GOVERNING LAW................................................33
   11.7   DISPUTE RESOLUTION...........................................33
   11.8   SEVERABILITY.................................................34
   11.9   HEADINGS.....................................................34
   11.10     EXECUTION IN COUNTERPARTS.................................34
    11.11    ENTIRE
Agreement..............................................................34



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                                      -4-

                 LICENSE AND RESEARCH AND DEVELOPMENT AGREEMENT

This Agreement is entered into between TBC, a Delaware corporation (,,TBC"), and
Revotar, a German stock company .

                                 R E C I T A L S

         A.       TBC owns an equity interest in Revotar and desires to license
                  certain technology to Revotar in order to permit Revotar to
                  conduct research and development on certain of TBC's compounds
                  which are pharmaceutical product candidates.


         B.       TBC and Revotar desire to enter into this Agreement to set
                  forth the terms and conditions pursuant to which these
                  compounds will be licensed to Revotar and the manner in which
                  the research and development work will be conducted.

         C.       TBC is the only shareholder of Revotar. David B. McWilliams is
                  representing TBC in his capacity as its Chief Executive
                  Officer as well as Revotar his capacity as its sole Managing
                  Director at the same time. The current articles of association
                  of the Company do not provide for an express authorization of
                  the Managing Director to represent both sides at a time. Since
                  it is not absolutely clear under German law whether such
                  express authorization is necessary or not, as a precaution the
                  Shareholder has recently amended its current articles of
                  association and provided for such express authorization. As
                  soon as this amendment has been registered in the commercial
                  register and become effective David B. McWilliams will - again
                  just as a precaution - again confirm and approve all his
                  declarations and signatures made in connection with this and
                  the other concerned agreements.

         In consideration of the foregoing and the mutual promises and covenants
         contained in this Agreement, the parties hereto agree as follows:


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                                      -5-

1.       DEFINITIONS.

The following capitalized terms used herein shall have the respective meanings
set forth below. The accounting terms used but not defined herein shall have the
meanings ascribed to them under U.S. Generally Accepted Accounting Principles.
Certain other capitalized terms are defined elsewhere in this Agreement.

         1.1      "AFFILIATE" means a person or entity that directly or
                  indirectly controls, is controlled by or is under common
                  control with, a party to this Agreement. ,,Control" (and, with
                  correlative meanings, the terms ,,controlled by" and ,,under
                  common control with") means, in the case of a corporation, the
                  ownership of more than 50% of the outstanding voting
                  securities thereof or the right to acquire such securities
                  within 60 days and, in the case of any other type of entity
                  (including without limitation joint ventures), an interest
                  that results in the ability to direct or have a significant
                  impact on the direction of the management and policies of such
                  entity or a significant ownership position of no less than
                  25%.

         1.2      "COMPOUNDS" means the compound owned by TBC and known as TBC
                  1269.

         1.3      "CONFIDENTIAL INFORMATION" means all proprietary information
                  communicated to, learned of, developed or otherwise acquired
                  by either party separately or jointly under this Agreement.

         1.4      "COST OF GOODS SOLD" OR ,,COGS" means TBC's total
                  Manufacturing Costs plus [*] of the Manufacturing Costs.

         1.5      "DEVELOPMENT COSTS" means (a) the direct costs, fees and
                  out-of-pocket or other expenses incurred in the course of
                  performing the work under the Development Program (b) overhead
                  allocable to development and (c) the amount paid to Third
                  Parties to acquire goods and services for the development
                  work, whether or not completed. Overhead allocated to
                  development shall be limited to (i) a reasonable allocation of
                  the cost of employees who have a direct relationship with the

- ------------
[*]      This information has been omitted in reliance on Rule 24B-2 under the
         Securities Exchange Act of 1934, and has been filed separately with the
         Securities and Exchange Commission.

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                                      -6-


                  Development Program, but who are not classified as direct
                  labor, which allocation shall be based on each such employee's
                  time spent in the Development Program as compared to time
                  spent on all such employee's work, and (ii) a reasonable
                  allocation of facilities' costs allocable to development
                  works. Development Costs shall be determined on a reasonable
                  and typical basis consistent with the developing party's
                  internal cost accounting system or on actual charges from
                  Third Parties.

         1.6      "DEVELOPMENT PROGRAM" means research and development and other
                  work conducted by the parties hereunder on a Product or
                  Compound for use in the Field of Use, including clinical
                  testing, regulatory submissions and ongoing Product and
                  Compound research and development performed in accordance with
                  the Work Plans.

         1.7      "DISTRIBUTION COSTS" means all freight and other
                  transportation costs actually incurred by a party hereto in
                  delivering a Product to its final distribution point before
                  delivery to an invoiced customer, including transportation
                  costs to a storage facility, storage charges, Third Party
                  handling fees, insurance during transport and taxes payable
                  for such transportation or storage services. Distribution
                  Costs shall exclude any transportation or other charges
                  deducted in calculating Net Sales. Distribution Costs incurred
                  by a party hereto shall be determined on a reasonable basis
                  consistent with such party's internal cost accounting system.

         1.7a     "EFFECTIVE DATE" Day of the signing of this agreement.

         1.7b     "EUROPEAN MARKET": Countries which are party of the European
                  Patent Treaty ("Europaisches Patentrechtsubereinkommen").

         1.8      "FDA" means the United States Food and Drug Administration.

         1.9      "FIELD OF USE" means the treatment of asthma using an inhaled
                  delivery system and the treatment of psoriasis using a topical
                  delivery system.

         1.10     "FIRST COMMERCIAL SALE" means the first arms-length sale in
                  the Territory pursuant to this Agreement to one or more Third
                  Parties of any Product following receipt of approval to
                  commence manufacturing and selling such Product from any one
                  PRA.

         1.11     "IND" means an investigational new drug application filed with
                  the FDA, or the similar filing made with any PRA, prior to
                  beginning clinical trials in humans.



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                                      -7-

         1.12     "IMPROVEMENTS" means any Technology that is discovered,
                  developed or otherwise acquired in the course of the
                  Development Program hereunder that may be useful in the
                  discovery, development, manufacture, sale or use of the
                  Compounds or Products.

         1.13     "LG CHEM" means LG Chemical Ltd.

         1.14     "LG CHEM LICENSE" means that certain Strategic Alliance
                  Agreement dated October 10, 1996 by and between TBC and LG
                  Chemical Ltd. as amended from time to time.

         1.15     "LICENSING TRANSACTION" means any agreement or arrangement of
                  any type pursuant to which Revotar licenses or transfers to a
                  Third Party any interest or rights of any kind to any Subject
                  Technology which is the subject of this Agreement including
                  without limitation the rights to use and sell any Compound or
                  Product in the Field of Use.

         1.16     "MANUFACTURING COSTS" means (a) the direct material and labor
                  costs associated with manufacturing the Products, (b) overhead
                  allocable to manufacture of the Products and (c) the amount
                  paid to Third Parties to acquire manufactured Products,
                  whether or not completed, and (d) Distribution Costs. Direct
                  material costs include the costs of purchasing raw materials
                  and packaging components. Direct labor includes the costs of
                  employees directly employed in Product manufacturing, quality
                  control or packaging. Overhead allocated to manufacture of the
                  Products shall be limited to (i) a reasonable allocation of
                  the cost of employees who have a direct relationship with
                  Product manufacturing, quality control or packaging, but who
                  are not classified as direct labor, which allocation shall be
                  based on each such employee's time spent in Product
                  manufacturing, quality control or packaging as compared to
                  time spent on all such employee's work, and (ii) a reasonable
                  allocation of facilities' costs allocable to Product
                  manufacturing, quality control and packaging. Manufacturing
                  Costs shall be determined on a reasonable and typical basis
                  consistent with the manufacturing party's internal cost
                  accounting system or on actual charges from Third Parties.

         1.17     "NDA" means a new drug application filed with the FDA, or a
                  similar application filed with any PRA to obtain marketing
                  approval for a Product.

         1.18     "NET SALES" means the gross amount billed for Products sold
                  pursuant to this Agreement to a Third Party, less discounts,
                  rebates, returns, credits, allowances,


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                                      -8-

                  uncollectible sales, shipping and insurance charges, sales
                  taxes, and other governmental charges measured by the amount
                  billed.

         1.18a    "NORTH AMERICA": countries and regions which are subject to
                  the patent legislation of the USA and Canada.

         1.19     "PRA" means any applicable regulatory authority in any
                  jurisdiction included within the Territory which regulates the
                  development, approval and marketing of pharmaceuticals.

         1.20     "PARTICIPATION AGREEMENT" means that certain agreement
                  entered into on _______, 2000 by and between TBC and Revotar
                  and certain German venture capital investors known as bmp Life
                  Science AG Venture Capital, bmp Venture Tech and Mediport
                  Venture Fonds GmbH.


         1.21     "PATENTS" means (a) the patent applications listed on
                  SCHEDULE 1 hereto and all patent applications hereafter filed
                  in the Territory that are owned by or licensed to or otherwise
                  acquired by TBC in the Territory and which have one or more
                  claims covering Compounds, Subject Technology or Improvements,
                  (b) any patent application in the Territory constituting an
                  equivalent, reissue, extension, continuation-in-part or a
                  division of any of the foregoing, and (c) any patents issued
                  upon any of the foregoing applications or any other patents
                  acquired by TBC relating to the Compounds, Subject Technology
                  or Improvements.

         1.22     "PHASE I CLINICAL TRIALS" means the first phase of human
                  clinical trials of a Compound required by the FDA or a PRA in
                  which the Compound is tested to determine early safety
                  profile, drug distribution patterns, and metabolism.

         1.23     "PHASE II CLINICAL TRIALS" means the second phase of human
                  clinical trials of a Compound required by the FDA or a PRA in
                  which the Compound is tested in patients afflicted with a
                  particular disease in order to gain preliminary evidence of
                  efficacy, optimal dosage and expanded evidence of safety.

         1.24     "PHASE III CLINICAL TRIALS" means the third phase of human
                  clinical trials of a Compound required by the FDA or a PRA in
                  which the Compound is tested in patients afflicted with a
                  particular disease in order to gain statistical proof of
                  efficacy and safety.


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                                      -9-

         1.25     "PIVOTAL CLINICAL TRIAL" means the final or pivotal phase of
                  human clinic trials of a Compound required by the FDA or a PRA
                  and intended to serve as the basis for an NDA filing.

         1.26     "PRODUCT" means any pharmaceutical composition incorporating
                  any Compound or combination of Compounds which is to be used
                  in the Field of Use.

         1.27     "PROJECT REPRESENTATIVE" means an individual designated by a
                  party pursuant to Section 3.2(a). All Project Representatives
                  of a party may be changed at any time by written notice to the
                  other party.

         1.28     "SUBJECT TECHNOLOGY" means (i) all Technology owned or
                  controlled by TBC as of the date hereof or owned or controlled
                  by TBC hereafter during the term of this Agreement, but only
                  to the extent that such Technology relates to the use,
                  manufacture or sale of the Compounds or Products. Technology
                  ,,owned or controlled" includes Technology as to which TBC has
                  the right to grant or cause to be granted sublicenses and/or
                  immunity from suit.

         1.29     "TBC 1269 PROGRAM" means the research and development of TBC
                  1269 pursuant to this Agreement for the development of
                  Products for use in the Field of Use.

         1.30     "TECHNOLOGY" means all (a) ideas, methods, inventions,
                  techniques, processes, know-how, trade secrets and other
                  information and all (b) compounds, formulations, and other
                  natural and man-made materials.

         1.31     "TERRITORY" shall mean all countries of the European Market as
                  defined in sec. 1.7b above.

         1.32     "THIRD PARTY" means any entity other than TBC, Revotar or
                  their Affiliates.

         1.33     "WORK PLAN" means a written summary of the tasks to be
                  undertaken by each party during a particular calendar year in
                  connection with the research and development, if applicable,
                  of the Compounds or Products, together with a budget of the
                  anticipated Development Costs associated therewith, adopted by
                  the parties in accordance with Section 3.2(d). Each Work Plan
                  will include reasonably detailed descriptions of the tasks and
                  work to be performed, the resources required to accomplish the
                  work, the costs associated with the planned work and the party
                  that will be responsible for accomplishing each task. Work
                  Plans shall generally be in the


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                                      -10-

                  format and shall contain the information set forth in the
                  initial Work Plan attached hereto pursuant to Section 3.2(c).

         1.34     "WORLDWIDE LICENSE" means one licensing transaction involving
                  at least - but not necessarily only - all countries within
                  North America and the European Market (exclusive of the
                  countries included within the territory described in the LG
                  Chem License, as far and as long the LG Chem License
                  prevails).

2.       LICENSE TO REVOTAR.

         2.1      EXCLUSIVE LICENSE FOR THE TERRITORY. Subject to the terms and
                  conditions of this Agreement, TBC hereby grants to Revotar an
                  exclusive right and license in the Territory, including the
                  exclusive right to grant sublicenses in the Territory.
                  The aforementioned license entitles Revotar to develop, use
                  and sell, any Compound or Product and to do research works
                  relating to the Compound and Product (a) which is covered by
                  one or more claims of the Patents or (b) which incorporates or
                  uses Subject Technology (herinafter "scope of the license")
                  and (c) without restriction to specific indications. Revotar
                  shall be obligated to perform in full all of the obligations
                  and agreements of any sublicenses, including payment of
                  royalties. The right of manufacturing remains with TBC
                  pursuant to section 5.1 hereof unless (a) Revotar grants a
                  sublicense to a Third Party which comprises also the
                  manufacturing rights within the scope of the sublicense
                  agreement or, (b) Revotar is able to produce the goods at
                  lesser Manufacturing Costs than TBC.


         2.2      TIME-LIMITED RIGHT TO REVOTAR TO GRANT SUBLICENSES OUTSIDE THE
                  TERRITORY TBC hereby grants to Revotar for a limited period of
                  [*] from the effective date on an exclusive right and license
                  to enter into a sublicense agreement of the same scope as
                  defined in sec. 2.1 above in all other countries outside the
                  Territory except for North America and the territory described
                  in the LG Chem License. The term of the


- -------------------------

[*]  This information has been omitted in reliance on Rule 24B-2 under the
     Securities Exchange Act of 1934, and has been filed separately with the
     Securities and Exchange Commission.
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                                      -11-

                  sublicense granted by Revotar within this period of [*]
                  does not have to be limited to a certain period of time.

                  After the expiration of the [*] period the right to enter into
                  sublicense agreements in countries outside the Territory
                  reverts to TBC. Sublicense Agreements concluded by Revotar
                  within the [*] period remain unaffected.

         2.3      WORLDWIDE LICENSE

                  For a period of [*] from the effective date on, Revotar is
                  entitled to grant a Worldwide License as a Licensing
                  Transaction subject to the approval of TBC according to
                  section 4.2 (f).

         2.4      RIGHTS AND DUTIES IN CONNECTION WITH A LICENSING TRANSACTION
                  TO A THIRD PARTY 2.4.1. In order to enable Revotar to
                  successfully negotiate and conclude Licensing Transactions
                  pursuant to sec. 2.2 and especially sec. 2.3, TBC will refrain
                  from entering into any Licensing Transaction outside of the
                  Territory for a period of [*] from the effective date on until
                  and as long as the conditions of the following subsections of
                  this section 2.4. are met.

                  2.4.2    [*]

                  2.4.3.   [*]

                  2.4.3.1. [*]

                  2.4.3.2. [*]


- -------------------------

[*]  This information has been omitted in reliance on Rule 24B-2 under the
     Securities Exchange Act of 1934, and has been filed separately with the
     Securities and Exchange Commission.
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3.       DEVELOPMENT PROGRAM.

         3.1      GOALS.

                  Commencing upon completion of the initial Work Plan as set
                  forth in Section 3.2(c), TBC and Revotar agree that they will
                  conduct the research and development on the Compounds and the
                  Products according to the Work Plans, with the goal of
                  developing commercially marketable Products in the shortest
                  feasible period of time. The parties agree that the Work Plans
                  will focus on the development of pharmaceuticals in the Field
                  of Use. The parties also agree that Revotar shall be
                  responsible for the conduct of the pre-clinical research
                  regarding the identification and formulation of the Compounds,
                  the clinical trials regarding the Products and the Compounds
                  in the Territory, and Patent filing, maintenance and
                  prosecution regarding the Products in the Territory; provided
                  that TBC will make such filings and undertake prosecution and
                  maintenance if requested by and paid for by Revotar.

                  The parties acknowledge that scientific research is conducted
                  in patterns and sequences, but it is the intention that
                  Revotar will at all times have a team or teams devoting direct
                  and full time attention to the TBC 1269 Program. Revotar shall
                  devote sufficient research scientists and personnel either now
                  on its staff or subsequently hired to the Development Program
                  to perform the goals set forth herein. Revotar will perform
                  and pay for the development of any Compound and Product for
                  use in the Field of Use up to and including all regulatory
                  approvals and clinical trials in the Territory regarding such
                  Compound. Any information generated by Revotar in connection
                  with the Development Program will be shared without costs to
                  TBC and LG Chem as far as TBC is obliged to disclose such
                  information to LG Chem under the LG Chem License in the
                  version prevailing at the effective date. Any information
                  generated by TBC concerning the Patents, Compounds or Products
                  will be shared without costs to Revotar; the same applies to
                  information generated by LG Chem, if the LG Chem License in
                  the version prevailing at the effective date does not prohibit
                  the passing on of such information to Revotar.


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                                      -13-

                  Revotar is entitled to pass on information generated by TBC or
                  LG Chem to a sublicensee, but with reference to information
                  generated by LG Chem only according to the provisions of the
                  preceding section. Revotar will endeavor to oblige sublicensee
                  to pass on information concerning any Compound and Product and
                  to assent to passing on such information to TBC and LG Chem
                  and other sublicensees. TBC is obliged in the same mnner if it
                  grants a license to a sublicensee.

                  While the parties agree to use best efforts to achieve the
                  goals of the Development Program, neither TBC nor Revotar
                  warrants or guarantees that their efforts will result in a
                  marketable or approvable Product or that the goals specified
                  in the Work Plan will be achieved within the periods set forth
                  therein.

         3.2      PROGRAM ADMINISTRATION.

                  3.2.1 PROJECT REPRESENTATIVES. The parties have each
                  designated two Project Representatives to facilitate liaison
                  between it and the other party, oversee and review the
                  progress of the Development Program, select indications to
                  pursue, determine the Development Program, develop clinical
                  trial protocols, manage the clinical/regulatory process and
                  discuss potential competition and other relevant matters to
                  assure rapid development and commercialization of the
                  Compounds and the Products. The Project Representatives will
                  also discuss and agree on the addition of indications outside
                  the Field of Use pursuant to the provisions of Section 2.1
                  above.

                  3.2.2 DISAGREEMENTS. All decisions made hereunder relating to
                  the Development Program shall require the approval of the
                  Project Representatives. The Project Representatives shall
                  attempt in good faith to reach consensus on all matters
                  regarding the Development Program. The Project Representatives
                  shall promptly present any disagreements to the chief
                  executive officers of the parties or their designees, who
                  shall attempt resolution of the matter. If such executives or
                  designees cannot promptly resolve such disagreement, then the
                  dispute shall be resolved under the arbitration provisions of
                  Section 11.7.



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                                      -14-

                  3.2.3 WORK PLANS. On or before the date hereof, the parties
                  hereto have agreed on the initial Work Plan for 2000, which is
                  attached hereto as SCHEDULE 2. If the Project Representatives
                  agree to pursue indications outside the Field of Use , then a
                  new Work Plan for those indications will be developed. The
                  Work Plan shall be the plan and budget as approved by both
                  parties in writing. Prior to November 1 of each year, the
                  Project Representatives shall prepare and recommend to each
                  party a proposed Work Plan for the next calendar year. Each
                  Work Plan adopted shall be agreed upon and signed by an
                  officer of both parties no later than January 1 of the year
                  covered by the Work Plan. The Project Representatives shall
                  actively consult with one another throughout the term of the
                  Development Program so as to adjust the specific work
                  performed under each Work Plan to conform to evolving
                  developments in technology and the results of the development
                  work performed. While minor adjustments to a Work Plan may be
                  made from time to time upon approval by the Project
                  Representatives, significant changes to the scope or direction
                  of the work in a Work Plan must be agreed to in writing by
                  each party, in the absence of which the most recently approved
                  Work Plan shall remain in effect.

                  3.2.4 PROGRESS REPORTS. Within 14 days following the end of
                  each calendar quarter, a Project Representative for each party
                  shall deliver to the other a reasonably detailed written
                  report which shall (a) describe the work performed by the
                  respective party during the quarter on the Development Program
                  and (b) if appropriate, recommend any revisions to the Work
                  Plan that would improve the progress of the Development
                  Program.

                  3.2.5 MEETINGS. The Project Representatives and other
                  employees or consultants of the parties responsible for
                  management of the Work Plan and the Development Program shall
                  meet at least once during each calendar quarter during the
                  term of the Development Program to review (i) relevant data,
                  (ii) technical issues that have arisen, (iii) issues of
                  priority and proposed Products or Compounds for clinical
                  candidates, (iv) the design and conduct of clinical trials and
                  anticipated regulatory


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                                      -15-


                  filings, (v) budgets and expenditures, (vi) competition,
                  (vii) patent prosecution, and (viii) any other matters
                  relevant to the development of the Products. Such meetings
                  shall be at such times as may be agreed to by the parties, and
                  the location of such meetings shall be at Revotar's
                  facilities, unless otherwise agreed by the parties. Revotar
                  shall be responsible for all costs incurred in connection with
                  such meetings. The Project Representatives shall jointly
                  prepare minutes summarizing the matters reviewed and any
                  actions taken at such meetings and shall distribute such
                  minutes to the parties within 14 days following each meeting.
                  Each party may invite additional colleagues to participate at
                  meetings as appropriate and acceptable to the other party.
                  Revotar shall be responsible for the preparation and
                  communication to TBC of the specific agenda of each meeting in
                  advance of each meeting and either party may place items for
                  consideration on the agenda.

         3.3      PERFORMANCE OF SERVICES.

                  Each party shall perform the work assigned to it in a prudent
                  and skillful manner in accordance, in all material respects,
                  with the Work Plan then in effect and applicable laws.
                  [*]Revotar shall make available to TBC any materials it
                  proposes to file with the FDA or a PRA for TBC's review and
                  approval, which approval may not be unreasonably withheld or
                  delayed. Such materials shall be made available to TBC
                  sufficiently in advance of the anticipated filing date so as
                  to give TBC a reasonable opportunity to review and comment.
                  All responses by regulatory bodies shall also be promptly
                  disclosed to TBC. Revotar also agrees that it will (i) consult
                  with and seek in good faith to agree with TBC regarding major
                  decisions pertaining to the clinical trials in the Territory,
                  including protocol design and selection, (ii) take steps to
                  insure that the data filed with any PRA and/or produced in
                  clinical trials in the Territory will comply with all
                  applicable standards and (iii) promptly supply such data to
                  TBC. In any case where responsibility for a regulatory filing
                  is assigned to a sublicensee, the applicable sublicense shall
                  require the sublicensee to afford the parties hereto the

   17

                                      -16-

                  same review, approval and comment rights with respect to such
                  regulatory filings as are set forth in this Section 3.3.

         3.4      RECORDS AND DATA.

                  Each party shall maintain records in sufficient detail and in
                  good scientific manner appropriate for patent and regulatory
                  purposes and so as to properly reflect all work done and
                  results achieved in the performance of the Work Plan and
                  Development Program. Such records shall include books,
                  records, reports, research notes, charts, graphs, comments,
                  computations, analyses, recordings, photographs, computer
                  programs and documentation thereof, computer information
                  storage means, samples of materials and other graphic or
                  written data generated in connection with the Work Plan and
                  Development Program, including any data required to be
                  maintained pursuant to applicable governmental regulations.
                  Each party shall provide the other the right to inspect all
                  such records, and shall provide copies of all such requested
                  records.

         3.5      VISIT OF FACILITIES.

                  Representatives of each party may, upon reasonable notice and
                  at times reasonably acceptable to the other party, (a) visit
                  the facilities where the Work Plan and Development Program are
                  being conducted and/or the facilities where the other party
                  manufactures any Product or Compound contained therein (or has
                  a Product or such a Compound manufactured by a Third Party),
                  (b) consult informally, during such visits and by telephone,
                  with personnel of the other party performing work on the Work
                  Plan and Development Program and (c) with the other party's
                  prior approval, which approval shall not be unreasonably
                  withheld, visit the sites of any clinical trials or other
                  experiments being conducted by such other party in connection
                  with the Work Plan and Development Program, but only to the
                  extent in each case as such trials or other experiments relate
                  to the Work Plan and Development Program. If requested by the
                  other party, TBC and Revotar shall cause appropriate
                  individuals working on the Development Program to be available
                  for meetings at the location of


   18

                                      -17-


                  the facilities where such individuals are employed at times
                  reasonably convenient to the party responding to such request.

         4.       PAYMENTS AND REPORTS.

         4.1      DEVELOPMENT FUNDING.

                  All Development Costs, including all preclinical toxicology
                  expenses incurred by TBC in the year 2000, whether incurred
                  before or after marketing approval of any Product, shall be
                  borne by Revotar up to a maximum amount of [*].

         4.2      ROYALTIES.

                  4.2.1 ROYALTY RATES WHEN NO LICENSING TRANSACTION. Pursuant to
                  the rights in Patents and Subject Technology granted hereby,
                  in the event that Revotar commences sales of Products without
                  having entered into any Licensing Transaction, Revotar or its
                  Affiliates shall pay TBC [*] of Net Sales relating to any
                  Product sold by Revotar and its Affiliates in the Territory.

                  4.2.2 ROYALTY RATES AFTER LICENSING TRANSACTION (a) If Revotar
                  enters into a Worldwide License pursuant to sec. 2.4 with a
                  Third Party, then all royalties, license fees, milestone
                  payments and other payments or revenues of any kind received
                  by Revotar pursuant to such Worldwide License shall be [*]
                  with TBC. In addition, in the event Revotar enters into any
                  Worldwide License, TBC expressly reserves the right to
                  co-promote the sale of Products and Compounds in the North
                  American market on terms mutually agreeable to Revotar, TBC
                  and the third party to any such Worldwide License, which
                  agreements shall be negotiated in good faith and included in
                  the agreements relating to the Worldwide License.
                  (b) In the event Revotar enters into any Licensing Transaction
                  which is not a Worldwide License but includes only countries
                  within the European Market, and


- -------------------------

[*]  This information has been omitted in reliance on Rule 24B-2 under the
     Securities Exchange Act of 1934, and has been filed separately with the
     Securities and Exchange Commission.
   19

                                      -18-

                  TBC is not required to fund a Phase III Clinical Trial to
                  obtain FDA approval regarding the Product, then Revotar and
                  TBC shall each pay to the other [*] of their respective
                  royalty revenues out of the Licensing Transaction to the third
                  party. This applies to Revotar only to the revenues generated
                  out of the European Market as defined above and applies only
                  to TBC regarding revenues generated in the North American
                  market.

                  (c) In the event Revotar enters into any Licensing Transaction
                  which is not a Worldwide License but includes only countries
                  within the European Market in the time of concluding the
                  License contract, and TBC is required to fund a Phase III
                  Clinical Trial to obtain FDA approval regarding the Product,
                  then Revotar shall pay to TBC [*] of its respective royalty
                  revenues out of any Licensing Transaction with third parties.
                  TBC will pay Revotar [*] of its respective royalty revenues
                  out of any Licensing Transaction with third parties. This
                  applies to Revotar only to the revenues generated out of the
                  European Market as defined above and applies to TBC only
                  regarding revenues generated in the North American market.

                  (d) In the event Revotar enters into any Licensing Transaction
                  which is not a Worldwide License and is not restricted to the
                  European Market, all royalties and other revenues received by
                  Revotar for sales generated outside the European Market which
                  are in excess of Development Costs incurred by Revotar in the
                  development of the Product in question shall be [*] by Revotar
                  and TBC.


                  (e) TBC and Revotar shall impose to their third party
                  licensees the duty to report on their Net Sales classified to
                  the regions defined in sec. (a) to (d).

                  (f) TBC and Revotar acknowledge and agree that any Licensing
                  Transaction involving countries outside the Territory shall
                  require the appropriate prior approval of TBC. The approval of
                  TBC will be only denied in case the Licensing transaction
                  infringes legitimate business interests of TBC. TBC is not
                  entitled to deny its approval without "good cause". There is
                  no "good cause" if the forecasted profits of the license which
                  requires the approval of TBC surpasses the profits of other
                  kinds of commercialization of the Compound which can be
                  realized at the time of the


- -------------------------

[*]  This information has been omitted in reliance on Rule 24B-2 under the
     Securities Exchange Act of 1934, and has been filed separately with the
     Securities and Exchange Commission.
   20


                                      -19-

                  prospected commencement of the pending license agreement
                  unless there are substantial reasons which surpass the
                  commercial interest of both parties. In addition, any license
                  or other agreement entered into by Revotar in connection with
                  a Licensing Transaction shall comply in all respects with the
                  terms and conditions of Section 2 of this Agreement and the
                  Participation Agreement, including Article 3 thereof.


                  4.2.3 ROYALTIES AFTER TERMINATION. After the expiration of the
                  term of this Agreement pursuant to the first sentence of
                  Section 10.1 ( below, and in perpetuity thereafter, Revotar
                  shall pay to TBC [*] of the amounts due pursuant to this
                  Section 4.2. The same applies mutatis mutandis to the amounts
                  owed by TBC to Revotar.

                  4.2.4 REPORTS AND PAYMENT. Each party shall keep, and shall
                  require all Affiliates and sublicensees to keep, accurate
                  records in sufficient detail to enable the amounts due to the
                  other party to be determined. Each party shall deliver to the
                  other party within 60 days after the end of each calendar
                  quarter a written accounting, including quantities and
                  monetary amounts of sales of each Product by such party and
                  its Affiliates and sublicensees, on a country-by-country
                  basis, and the amount of the royalty payments, if any, due to
                  the other party for such quarter. Each party or its
                  Affiliates, simultaneously with the delivery of each such
                  accounting, shall tender payment of all royalties shown to be
                  due thereon.

         4.3      AUDIT RIGHTS.

                  Each party shall permit the other party or its representatives
                  to have access, at its own expense, no more than once in each
                  calendar year during the term of this Agreement and twice
                  during the three (3) calendar years following the termination
                  hereof, during regular business hours and upon reasonable
                  notice, to its records and books for the sole purpose of
                  determining the appropriateness of all amounts payable
                  hereunder or


- -------------------------

[*]  This information has been omitted in reliance on Rule 24B-2 under the
     Securities Exchange Act of 1934, and has been filed separately with the
     Securities and Exchange Commission.
   21

                                      -20-

                  verifying the royalties and profit sharing amounts payable
                  hereunder. If such examination reveals that such amounts have
                  been overstated or such royalties have been understated for
                  any calendar year, such overpayment shall be promptly refunded
                  or in the case of any underpayment, such party shall promptly
                  pay the amount of any underpayment; provided that if such
                  examination was not conducted by an independent accountant,
                  the party whose records were examined shall have the right to
                  engage an independent accountant reasonably acceptable to
                  examining party to verify the results of such examination. Any
                  sublicense granted by Revotar hereunder shall contain audit
                  provisions as set forth in this Section 4.4, mutatis mutandis.

         4.4      PAYMENT CURRENCY.

                  All payments to be made under this Agreement shall be made in
                  United States dollars. In the case of sales in foreign
                  currencies, the rate of exchange to be used in computing the
                  amount of currency equivalent in United States dollars due to
                  TBC for the calendar quarter just ended shall be made at the
                  rate of exchange prevailing on the last day of such calendar
                  quarter published by a New York money center bank designated
                  by Revotar which Revotar uses for currency conversion in the
                  preparation of Revotar financial reports.

         4.5      PAYMENT MECHANICS.

                  All payments under this Agreement shall be made by wire
                  transfer of immediately available funds to such account as the
                  receiving party shall specify or by other payment method
                  acceptable to the parties.

5.       COMMERCIALIZATION.

         5.1      TBC TO MANUFACTURE.

                  TBC will manufacture or subcontract, after the agreement of
                  Revotar and as a contractor of Revotar within the limits of
                  2.1, the manufacture of all Revotar's requirements for
                  Compounds and/or Products, subject to customary forecast and
                  order procedures. If TBC or its subcontractor is manufacturing
                  Compounds and/or Products, TBC's (or its subcontractor's)
                  responsibilities shall include all aspects of the
                  manufacturing process, including maintenance of manufacturing
                  inventory, quality control and shipment of Compounds and/or

   22

                                      -21-

                  Products in accordance with orders placed by Revotar. TBC and
                  Revotar will also agree to negotiate in good faith a
                  manufacturing agreement which will include provisions on
                  forecasts, delivery time, quality control, quality assurance,
                  delivery location, insurance, packaging, inventories, term and
                  time of payment and such other provisions as are customarily
                  included in agreements of this type. As compensation for such
                  manufacturing services, TBC shall be entitled to receive
                  payment of its COGS. Revotar shall have the right to audit at
                  its expense the manufacturer or submanufacturer of the
                  Compounds or Products.

         5.2      REVOTAR TO SELL IN TERRITORY.

                  Following regulatory approval in any country in the Territory,
                  and subject to Section 5.3 below, Revotar shall use
                  commercially reasonable efforts to market and sell the
                  Products in such country. Revotar will use all resources in
                  such marketing and sales efforts that it would use regarding
                  any of its other products with similar commercial potential.
                  All terms of sale, including pricing policies, credit terms,
                  cash discounts and returns and allowances, shall be set by
                  Revotar. Revotar shall be responsible for invoicing the
                  customers for Products and collecting payment therefore.
                  Revotar, in consultation with TBC, will select the trademarks
                  to be used for the sale of Products in the Territory, which
                  selection will take into account the need for worldwide
                  trademarks. Such trademarks regarding sales of Products in the
                  Territory or any other territory that Revotar chooses will be
                  owned by Revotar. In the event TBC is marketing and selling
                  Products, TBC will have the right to use such trademarks
                  outside the Territory at no cost to TBC.

         5.3.     SUBLICENSEE TO REVOTAR

                  If Revotar will grant a sublicense to a Third Parties then
                  Revotar will impose to the sublicensee to assume the
                  obligations entered into by Revotar in section 5.2, sentences
                  1 and 2.

   23

                                      -22-


6.       TBC REPRESENTATIONS AND WARRANTIES.

TBC represents and warrants to Revotar as follows:

         6.1      NO THIRD PARTY AGREEMENTS.

                  Except for the patent applications filed by TBC and the LG
                  Chem License, there are no agreements with third parties
                  relating to the Products.

         6.2      NO THIRD PARTY RIGHTS.

                  TBC owns or possesses adequate licenses or other rights to use
                  all patents, patent rights, inventions and know-how necessary
                  for the manufacture, use and sale of the Compounds and
                  Products and to grant the licenses granted herein. To the best
                  knowledge of TBC, the manufacture, use or sale of the Products
                  and Compounds pursuant to this Agreement will not infringe or
                  conflict with any Third Party right or patent and TBC is not
                  aware of any pending patent application that if issued would
                  be infringed by the manufacture, use or sale of the Products
                  pursuant to this Agreement. TBC has not received any notice
                  from a third party that any manufacture, use or sale of the
                  Products and Compounds pursuant to this Agreement infringes or
                  conflicts with any Third party right or patent.

7.       PROPRIETARY RIGHTS.

         7.1      IMPROVEMENTS.

                  Improvements conceived or made solely by the employees of
                  either party during the term of this Agreement shall be the
                  sole property of such party. Improvements made jointly by
                  employees of both parties during the term of this Agreement
                  shall be owned by Revotar. All Improvements no matter if
                  conceived solely by one party to this Agreement or jointly
                  shall be automatically included in the license granted to
                  Revotar under Section 2; provided, that the parties agree to
                  negotiate in good faith appropriate modifications to the terms
                  of this Agreement which reflect the fact that


   24

                                      -23-

                  an Improvement has been jointly developed or developed
                  only by TBC. TBC shall have a perpetual, royalty-free and
                  non-exclusive license, to make, use and sell and sublicense
                  outside the Territory any Improvements owned by Revotar,
                  provided such right does not conflict with the provisions of
                  this Agreement, especially sec. 2.4. Each party shall promptly
                  disclose to the other any Improvements developed by its
                  employees or agents acting on its behalf. Each party agrees
                  that all employees and other persons acting on its behalf
                  under this Agreement shall be obligated under a binding
                  written agreement to assign (or exclusively license in the
                  case of academics) to such party or as such party shall direct
                  all Improvements made or conceived by such employee or other
                  person.

         7.2      PATENT PROSECUTION AND MAINTENANCE.

                  The parties agree that they will coordinate with each other in
                  all reasonable respects the worldwide prosecution of the
                  Patents, subject to the provisions of this Section 7. TBC
                  shall be responsible, at its expense, for prosecuting and
                  maintaining any patents and patent applications relating to
                  the Patents in existence on the date of this Agreement.
                  Revotar shall be responsible, at its expense, for filing,
                  prosecuting and maintaining the Patents (to the extent they
                  are not in existence on the date of this Agreement) (including
                  Improvements owned by Revotar or jointly developed by Revotar
                  and TBC, but excluding Improvements owned exclusively by TBC);
                  provided that TBC will make such filings and undertake
                  prosecution and maintenance if requested by and paid for by
                  Revotar. Each party shall furnish the other party with copies
                  of any patent application concerning Subject Technology or
                  Improvements sufficiently in advance of the anticipated filing
                  date (but in no event less than 5 working days before filing)
                  so as to give the other party a reasonable opportunity to
                  review and comment. Each party shall also furnish copies to
                  the other party of all communications to and from United
                  States and foreign patent offices regarding patents or patent
                  applications relating to this Agreement within a reasonable
                  time prior to filing such communication or promptly following
                  the receipt thereof. Each party shall reasonably consider any
                  comments the other party may have related to such patent
                  applications or communications. Each party shall have the
                  right


   25

                                      -24-

                  at its expense to file, prosecute and maintain patents in the
                  United States and all foreign countries on Improvements owned
                  solely by it. Notwithstanding the foregoing, beyond best
                  efforts, neither party assumes liability to the other for the
                  successful prosecution of any patent application. However, if
                  either party shall fail to pay an annuity, tax or other
                  maintenance fee with respect to a Patent or Patent application
                  or otherwise decide not to pursue a Patent relating to
                  Improvements owned solely by it, it shall give the other party
                  timely notice and the opportunity to take such action and
                  assume all ownership rights to such Patent or Patent
                  application.

         7.3      THIRD PARTY CLAIM OF INFRINGEMENT.

                  Each party shall give the other prompt notice of each claim or
                  allegation that the exercise of rights hereunder constitutes
                  an infringement of one or more patents or other rights of a
                  Third Party. Revotar shall use all commercially reasonable
                  efforts to defend the parties against any such claim or
                  allegation with counsel of its own choice reasonably
                  acceptable to Revotar. The costs of such defense and any costs
                  of settling or otherwise satisfying such claim (including
                  damage awards, if any) shall be borne as follows:

                  7.3.1 TBC COSTS. TBC shall bear all costs associated with
                  claims based on any patent issued or patent application
                  published as of the date of this Agreement. If Revotar
                  continues to sell the Products following notice of such claim
                  against explicit requests to the contrary by TBC, then Revotar
                  shall have the obligation to satisfy all claims in connection
                  with such continued sales activity. At all times, Revotar
                  shall have the right to defend itself at its cost against this
                  with counsel of its own choice reasonably acceptable to TBC.

                  7.3.2 REVOTAR COSTS. Revotar shall bear all costs associated
                  with claims based on any patent or patent application that was
                  not issued or published as of the date of this Agreement.


   26


                                      -25-

                  7.3.3 COOPERATION. Each party agrees to cooperate with the
                  other in the defense of any such claim or allegation,
                  including, to the extent able, furnishing testimony by its
                  employees and providing technical support and information as
                  requested. Neither party shall settle or discontinue defense
                  of any such case without the other's prior written consent,
                  which shall not be unreasonably withheld. In the case of any
                  proposed settlement involving a cross-license with a Third
                  Party, neither party may unreasonably refuse to enter into
                  such a cross-license. The provisions of this Section 7.3 shall
                  also apply to actions for declaratory relief which raise or
                  are in response to an issue of infringement of a Third Party
                  patent.

         7.4      INFRINGEMENT BY THIRD PARTIES.

                  Each party shall give the other party prompt written notice of
                  any incident of infringement of Patents that comes to its
                  attention. The parties shall thereupon confer as to what steps
                  are to be taken to stop or prevent such infringement. Revotar
                  agrees to use reasonable efforts to stop any such
                  infringement, but shall not be obligated to commence
                  proceedings against the infringer. If Revotar decides to
                  commence proceedings, however, Revotar shall be responsible
                  for any legal costs incurred and will be entitled to retain
                  any settlement or damage award received, and TBC agrees to
                  cooperate with Revotar in such proceeding. TBC shall have the
                  right at its expense to engage its own counsel in connection
                  with such proceedings. Should Revotar decide not to commence
                  proceedings, and should the infringement represent a
                  substantial threat to the commercial value of any Products,
                  TBC shall be entitled (but not obligated) to do so in its own
                  name and/or in Revotar's name against the infringer, in which
                  event TBC shall be responsible for all legal costs incurred,
                  and will be entitled to retain any settlement or damage award
                  received, and Revotar agrees to cooperate with TBC in such
                  proceedings and Revotar shall have the right at its expense to
                  engage its own counsel in connection with such proceedings.


   27

                                      -26-
8.       CONFIDENTIALITY.

         8.1      GENERAL.

                  Any party receiving Confidential Information pursuant to this
                  Agreement shall maintain the confidential and proprietary
                  status of such Confidential Information, keep such
                  Confidential Information and each part thereof within its
                  possession or under its control sufficient to prevent any
                  activity with respect to the Confidential Information that is
                  not specifically authorized by this Agreement and prevent the
                  disclosure of any Confidential Information to any Third Party
                  using the same degree of care it would use with respect to its
                  own information of like importance; PROVIDED, HOWEVER, that
                  such restrictions shall not apply to any Confidential
                  Information that is (a) independently developed outside the
                  scope of this Agreement by employees of the receiving party
                  having no access to or knowledge of the Confidential
                  Information disclosed hereunder, (b) in the public domain at
                  the time of its receipt or thereafter becomes part of the
                  public domain through no fault of the receiving party, (c)
                  lawfully received without an obligation of confidentiality
                  from a Third Party having the right to disclose such
                  information, (d) released from the restrictions of this
                  Section 8 by the express written consent of the disclosing
                  party, (e) disclosed to any permitted assignee, sublicensee or
                  subcontractor or customer of Revotar or TBC, provided that
                  such assignee, sublicensee, subcontractor or customer is
                  subject to the provisions of this Section 8 or substantially
                  similar provisions or (f) required by law, statute, rule or
                  court order to be disclosed, including requirements of the
                  Securities and Exchange Commission, the FDA, any PRA, and
                  other regulatory authorities, provided that the disclosing
                  party uses commercially reasonable efforts to obtain
                  confidential treatment of any such disclosure. Without
                  limiting the generality of the foregoing, Revotar and TBC each
                  shall use all commercially reasonable efforts to obtain, if
                  not already in place, confidentiality agreements from its
                  respective relevant employees and agents, to protect the
                  Confidential Information as herein provided.



   28

                                      -27-


         8.2      DISCLOSURE OF AGREEMENT.

                  Neither party shall make a public announcement or otherwise
                  disclose the terms of this Agreement to any Third Party
                  without the prior written consent of the other except that the
                  parties may without such consent disclose (a) the existence of
                  this Agreement, (b) the identity of the other party and (c)
                  the general subject matter of this Agreement. Each party shall
                  also be permitted to make such disclosure of the terms of this
                  Agreement as its counsel reasonably determines is necessary to
                  comply with law, provided that such party shall use
                  commercially reasonable efforts to obtain confidential
                  treatment of any such disclosure.

9.       INDEMNIFICATION.

         9.1      MUTUAL RIGHT TO INDEMNIFICATION.

                  Each party shall defend, indemnify and hold harmless the other
                  and its directors, officers, employees and agents from and
                  against any and all claims, liabilities, losses and expenses,
                  including attorneys' fees, incurred by or asserted against it
                  or any of the foregoing arising out of the development,
                  testing, manufacture, handling or storage of any Product by
                  such party, including without limitation (i) any actual or
                  alleged bodily injury, death or property damage resulting from
                  the use of any Product manufactured by such party, (ii) any
                  actual or alleged violation of law applicable to the
                  development, testing, manufacture, handling or storage of the
                  Products by such party and (iii) any Product recall of Product
                  manufactured by such party that is ordered by a governmental
                  agency or required by a confirmed Product failure as
                  reasonably determined by the parties, except as otherwise
                  provided herein and except to the extent that such
                  liabilities, losses and expenses result from the negligence or
                  willful misconduct of a party, in which case the party who
                  engaged in such negligence or willful misconduct shall
                  indemnify and hold harmless the other party and its directors,
                  officers, employees and agents. Each party shall defend,
                  indemnify and hold harmless the other party and its directors,
                  officers, employees and agents from and against any and all
                  claims, liabilities, losses and expenses, including attorneys'
                  fees, incurred by or asserted against the other party or any
                  of the foregoing


   29

                                      -28-

                  arising out of a misrepresentation regarding any sales of
                  Products by such party, it Affiliates or sublicensees which is
                  not in accordance with approved Product claims.

         9.2      PROCEDURE.

                  Any person that intends to claim indemnification under this
                  Section 9 (an ,,Indemnitee") shall promptly notify the other
                  party (the ,,Indemnitor") of any claim, in respect of which
                  the Indemnitee intends to claim such indemnification, and the
                  Indemnitor shall assume the defense thereof with counsel
                  mutually satisfactory to the parties; provided, however, that
                  an Indemnitee shall have the right to retain its own counsel,
                  with the fees and expenses to be paid by the Indemnitor, if
                  representation of such Indemnitee by the counsel retained by
                  the Indemnitor would be inappropriate due to actual or
                  potential differing interests between such Indemnitee and any
                  other party represented by such counsel in such proceedings.
                  The indemnity agreement in this Section 9 shall not apply to
                  amounts paid in settlement of any loss, claim, liability or
                  action if such settlement is effected without the consent of
                  the Indemnitor, which consent shall not be withheld
                  unreasonably. The failure to deliver notice to the Indemnitor
                  within a reasonable time after the commencement of any such
                  action, if prejudicial to its ability to defend such action,
                  shall relieve such Indemnitor of any liability to the
                  Indemnitee under this Section 9, but not any liability that it
                  may have to any Indemnitee otherwise than under this Section
                  9. The Indemnitee and its employees and agents shall cooperate
                  fully with the Indemnitor and its legal representatives in the
                  investigation of any action, claim or liability covered by
                  this indemnification. In the event that each party claims
                  indemnity from the other and one party is finally held liable
                  to indemnify the other, the Indemnitor shall additionally be
                  liable to pay the reasonable legal costs and attorneys' fees
                  incurred by the Indemnitee in establishing its claim for
                  indemnity.

         9.3      PRODUCT LIABILITY INSURANCE.

                  Each party shall use all commercially reasonable efforts to
                  maintain product liability insurance with respect to its
                  manufacture and sale of the Products hereunder. Such insurance
                  shall be in such amounts and subject to such deductibles as
                  the parties may


   30

                                      -29-

                  agree based upon standards prevailing in the industry at the
                  time such manufacturing commences. At such time as a Product
                  is being launched by a party for commercial sale, the parties
                  shall attempt to maximize the product liability insurance
                  coverage for both parties. TBC shall maintain such insurance
                  for so long as Revotar continues to sell any Product
                  manufactured by TBC, and thereafter for so long as TBC
                  maintains insurance for itself covering such manufacture or
                  sales. Revotar shall maintain such insurance for as long as
                  Revotar continues to sell any Product pursuant to this
                  agreement manufactured by it, and thereafter for so long as
                  Revotar maintains insurance for itself covering such
                  manufacture or sales.

10.      TERM AND TERMINATION.

         10.1     LICENSE TERM.

                  The obligations of Revotar under the license granted in
                  section 2 shall terminate as to each Compound or Product on a
                  country-by-country basis on expiration of the last patent
                  included in the Patents in such country relating to each
                  Compound or Product in such country. Thereafter, Revotar shall
                  have a license to and perpetual rights in such Patents and
                  Subject Technology in such country as to the Product in
                  question, subject only to the obligations to make royalty
                  payments pursuant to Section 4.2.3 above..

         10.2     TERMINATION FOR BREACH.

                  Either party may terminate this Agreement by written notice to
                  the other in the event that (i) the other party fails to
                  perform any material obligation hereunder and such failure is
                  not cured within 60 days following prompt notice thereof from
                  the non-defaulting party, or (ii) any bankruptcy,
                  receivership, insolvency or reorganization proceedings are
                  instituted by the other party or any such proceedings are
                  instituted against the other party and not dismissed within
                  120 days. The bankruptcy of a party shall not give rise to the
                  right of the bankrupt party to terminate any license granted
                  herein.


   31

                                      -30-


         10.3     TERMINATION FOR FAILURE TO PROCEED.

                  In the event that (a) the Project Representatives have not
                  determined to proceed with the filing of a protocol for a
                  Pivotal Clinical Trial of a Product within six months after
                  completion of the last Phase II Clinical Trial and (b) the
                  parties have not agreed on plans for additional Phase II
                  trials of any Product, then TBC may terminate the license
                  granted hereunder solely with respect to such indications. All
                  other rights and licenses of Revotar hereunder shall continue
                  unimpaired. Notwithstanding the foregoing, if the Revotar
                  Project Representative has voted in favor of such filing and
                  the TBC Representative has voted against, then TBC may not
                  terminate the license for such indication. In addition, if
                  Revotar determines not to pursue commercialization of the
                  Product in any geographic market in the Territory and/or for
                  any clinical indication, it will cooperate with TBC to jointly
                  seek alliances with third parties to develop such use of a
                  Product, or at the option of TBC, will negotiate in good faith
                  with TBC for the license of such rights to TBC. This Agreement
                  shall terminate upon the failure of the Venture Capital
                  Investors (used herein as defined in the Participation
                  Agreement) to comply with the provisions of Article 3(8) of
                  the Participation Agreement.

         10.4     SURVIVAL OF OBLIGATIONS.

                  No termination of this Agreement shall eliminate any rights
                  and obligations accrued prior to such termination. Promptly
                  following any termination of this Agreement, each party shall
                  return all written materials containing Confidential
                  Information, except one copy that may be retained by counsel
                  for each of the parties for record keeping purposes only. The
                  provisions of Sections 4.2.3, 7.3, 9, 10.4, 11.6 and 11.7
                  shall survive any termination of this Agreement. The
                  provisions of Section 8 shall survive until five years after
                  the expiration of the license as to all of the Products.



   32
                                      -31-

11       MISCELLANEOUS.

         11.1     FORCE MAJEURE.

                  Each party shall be excused for any failure or delay in
                  performing any of its obligations under this Agreement, if
                  such failure or delay is caused by Force Majeure. For purposes
                  of this Agreement, ,,Force Majeure" shall mean any act of God,
                  accident, explosion, fire, storm, earthquake, flood, drought,
                  riot, embargo, civil commotion, war, act of war or any other
                  circumstances or event beyond the reasonable control of the
                  party relying upon such circumstance or event.

         11.2     RELATIONSHIP OF THE PARTIES.

                  The parties agree that each is acting as an independent
                  contractor with respect to the other and nothing contained in
                  this Agreement is intended, or is to be construed, to
                  constitute Revotar and TBC as partners or joint venturers or
                  TBC an agent of Revotar. Neither party hereto shall have any
                  express or implied right or authority to assume or create any
                  obligations on behalf of or in the name of the other party or
                  to bind the other party to any contract, agreement or
                  undertaking.

         11.3     NOTICES.

                  Any notice or other communication hereunder shall be in
                  writing and shall be deemed given when so delivered in person,
                  by overnight courier (with receipt confirmed) or by facsimile
                  transmission (with receipt confirmed by telephone or by
                  automatic transmission report) or on the tenth business day
                  after being sent by registered or certified mail (postage
                  prepaid, return receipt requested), as follows (or to such
                  other person's address as may be specified in writing to the
                  other party hereto):


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                                      -32-


                  Texas Biotechnology Corporation
                  7000 Fannin, 20th Floor
                  Houston, Texas  77030
                  Attention:  David B. McWilliams
                  Telephone:  (713) 796-8822
                  Facsimile:  (713) 796-8232

                  Revotar Biopharmaceuticals AG
                  until further notice: c/o Dr. Horst Witzel
                  Schutzallee 48
                  14169 Berlin

         11.4     SUCCESSORS AND ASSIGNS.

                  The terms and provisions of this Agreement shall inure to the
                  benefit of, and be binding upon, Revotar, TBC, and their
                  respective successors (including a successor pursuant to a
                  merger of a party hereto) and assigns. This Agreement, or any
                  of the rights granted hereunder, may be assigned by Revotar or
                  TBC to any of their respective Affiliates; provided, that such
                  assignment expressly provides that the assignor remains liable
                  for its obligations hereunder and the performance of its
                  Affiliate under this Agreement.

         11.5     AMENDMENTS AND WAIVERS.

                  No amendment, modification, waiver, termination or discharge
                  of any provision of this Agreement, nor consent to any
                  departure by Revotar or TBC therefrom, shall in any event be
                  effective unless the same shall be in writing specifically
                  identifying this Agreement and the provision intended to be
                  amended, modified, waived, terminated or discharged and signed
                  by the party against whom enforcement of such amendment is
                  sought, and each amendment, modification, waiver, termination
                  or discharge shall be effective only in the specific instance
                  and for the specific purpose for which given. No provision of
                  this Agreement shall be varied, contradicted or explained by
                  any oral agreement, course of dealing or performance or any
                  other matter not set forth in an agreement in writing and
                  signed by the party against whom enforcement of such variance,
                  contradiction or explanation is sought.

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                                      -33-


         11.6     GOVERNING LAW.

                  This Agreement shall be governed by and construed in
                  accordance with the laws of the Federal Republic of Germany.

         11.7     DISPUTE RESOLUTION.

                  11.7.1 The parties agree to effect all reasonable efforts to
                  resolve any and all disputes between them in connection with
                  this Agreement in an amicable manner. The parties agree that
                  any dispute that arises in connection with this Agreement and
                  which cannot be amicably resolved by the parties shall be
                  resolved by binding Alternative Dispute Resolution (ADR) in
                  the manner set forth in the following Section 11.7.2

                  11.7.2. All diputes arising in connection with this Agreement
                  or its validity which cannot be amicably resolved by the
                  parties shall be finally settled in accordance with the
                  Arbitration Rules of the German Institution of Arbitration
                  e.V. (DIS) without recourse to the ordinary courts of law if
                  not agreed otherwise in this section 11.7.2..

                  The place of arbitration shall be Berlin. The language of the
                  arbitral proceedings shall be English.

                  The arbitral tribunal shall consist of a single neutral
                  individual selected according to the following subsection.

                  If a party intends to begin ADR to resolve a dispute, such
                  party shall provide written notice to the other party
                  informing the other party of such intention and the issues to
                  be resolved. Within ten (10) business days after its receipt
                  of such notice, the other party may, by written notice to the
                  party initiating ADR, add additional issues to be resolved. If
                  the parties cannot agree upon the selection of a neutral
                  within twenty (20) business days following receipt of the
                  original ADR notice, a neutral shall be selected by the then
                  President ("Vorstandsvorsitzender") of the German Institution
                  of Arbitration (D.I.S.), Bonn. The neutral shall be a single
                  individual having experience in the pharmaceutical industry.
                  The neutral selected shall not be an employee, director or
                  shareholder of either party or of an Affiliate. Each party
                  shall have ten

   35

                                      -34-

                  (10) business days from the date the neutral is selected to
                  object in good faith to the selection of that person. If
                  either party makes such an objection, the then President of
                  the DIS shall, as soon as possible thereafter, select another
                  neutral under the same conditions as set forth above.

         11.8     SEVERABILITY.

                  If any provision hereof should be held invalid, illegal or
                  unenforceable in any respect in any jurisdiction, then, to the
                  fullest extent permitted by law, (a) all other provisions
                  hereof shall remain in full force and effect in such
                  jurisdiction and shall be liberally construed in order to
                  carry out the intentions of the parties hereto as nearly as
                  may be possible and (b) such invalidity, illegality or
                  unenforceability shall not affect the validity, legality or
                  enforceability of such provision in any other jurisdiction.

         11.9     HEADINGS.

                  Headings used herein are for convenience only and shall not in
                  any way affect the construction of, or be taken into
                  consideration in interpreting, this Agreement.

         11.10    EXECUTION IN COUNTERPARTS.

                  This Agreement may be executed in any number of counterparts,
                  each of which counterparts, when so executed and delivered,
                  shall be deemed to be an original, and all of which
                  counterparts, taken together, shall constitute one and the
                  same instrument.

         11.11    ENTIRE AGREEMENT.

                  This Agreement and the Research Agreement attached hereto as
                  SCHEDULE 3, contains the entire agreement and understanding of
                  the parties hereto, and supersedes any prior agreements or
                  understandings between the parties with respect to the subject
                  matter hereof.


   36

                                      -35-


         IN WITNESS HEREOF, the parties hereto have caused this Agreement to be
duly executed as of the 21st day of July, 2000 .

                               TEXAS BIOTECHNOLOGY CORPORATION


                               By:  /s/ David B. McWilliams
                                    --------------------------------------------
                               Title:  President
                                       -----------------------------------------

                               REVOTAR BIOPHARMACEUTICALS AG

                               By: /s/ David B. McWilliams
                                   ---------------------------------------------
                               Title:  Managing Director
                                       -----------------------------------------