1


     Portions of this Exhibit 10.2 have been redacted and are the subject of a
confidential treatment request filed with the Secretary of the Securities and
Exchange Commission.



   2



                       COLLABORATIVE RESEARCH, DEVELOPMENT
                         AND COMMERCIALIZATION AGREEMENT


BETWEEN:                  BIOCHEM PHARMA (INTERNATIONAL) INC., a
                          corporation incorporated under the laws of Canada and
                          having its registered office at Commerce Court West,
                          Suite 5300, Toronto, Ontario, M5L 1B9 (hereinafter
                          called "BioChem").


AND:                      ONCOGENE SCIENCE, INC., a corporation
                          incorporated under the laws of Delaware and having its
                          principal place of business at 106 Charles Lindbergh
                          Boulevard, Uniondale, New York, 11553 (hereinafter
                          called "Oncogene").


WHEREAS each of BioChem and its Affiliates and Oncogene and its Affiliates is
currently conducting research in respect of antiviral agents which target
certain illnesses;

WHEREAS BioChem and its Affiliates, on the one hand, and Oncogene and its
Affiliates, on the other hand, have decided to collaborate and combine their
efforts in connection with the research, development and commercialization of
antiviral agents which primarily target protein/nucleic interactions for the
treatment of certain illnesses;

WHEREAS BioChem and its Affiliates and Oncogene and its Affiliates are willing
to use their research facilities, scientists, research assistants, technicians
and other personnel to conduct their obligations under this Agreement.

NOW THEREFORE, THE PARTIES AGREE AS FOLLOWS:

                                    ARTICLE 1
                                 INTERPRETATION

1.1  Defined terms. In this Agreement, unless the context or subject matter is
     inconsistent therewith, the following terms and expressions shall have the
     following meanings:

     (a)  "Acquisition" shall have the meaning ascribed thereto at Section
          8.2(f) hereof.

     (b)  "Affiliate" shall mean, with respect to any Person (including a
          Party), any other Person which directly or indirectly controls or is
          controlled by, or is under direct or indirect common control with,
          such first mentioned Person or any Person which is directly or
          indirectly controlled by a Person which controls


   3


          the first mentioned Person; for the purpose of this definition,
          "control" shall mean, with respect to any Person (including any
          Party), the ownership of more than 50% of the voting shares or other
          voting equity of that Person.

     (c)  "Agreement" shall mean this collaborative research, development and
          commercialization agreement and all instruments supplemental hereto or
          in amendment or in confirmation hereof; "herein", "hereof", "hereto",
          "hereunder" and similar expressions mean and refer to this Agreement
          and not to any particular article, section, subsection or other
          subdivision; "article", "section", "subsection" or other subdivision
          of this Agreement shall mean and refers to the specific article,
          section, subsection or other said subdivision of this Agreement.

     (d)  "BioChem Confidential Information" shall mean all confidential
          information disclosed to Oncogene verbally and subsequently confirmed
          in writing as "confidential" or designated as "confidential" by
          Biochem or its Affiliates at the time of disclosure to Oncogene, to
          the extent that such information as of the date of disclosure to
          Oncogene is not (i) demonstrably known to Oncogene as evidenced by
          written documentation other than by virtue of a prior confidential
          disclosure to Oncogene by BioChem or its Affiliates, or (ii) disclosed
          in the published literature or otherwise to the public through no
          fault of Oncogene, its Affiliates, employees or consultants, or (iii)
          obtained from an independent Third party without binder of secrecy,
          provided that such independent Third Party has no obligation of
          confidentiality to BioChem or its Affiliates.

     (e)  "BioChem Technology" shall mean and include all technology and
          technical information willing to a Lead Compound or used or furnished
          by BioChem and/or its Affiliates in respect of the performance by it
          of its obligations hereunder, including all inventions, chemical
          structures and methods for synthesis, structure-activity
          relationships, assay methodology, methods, processes, formulae, plans,
          specifications, characteristics, equipment and equipment designs, know
          how, trade secrets, discoveries, results, formulations and biological,
          toxicological and clinical data and physical, chemical or biological
          material which are developed by employees of, or consultants to,
          BioChem and/or its Affiliates, prior to or during the term of this
          Agreement or acquired by purchase, license, assignment or other means
          from third parties prior to or during the term of this Agreement that
          is not Joint Technology, but only to the extent that BioChem or its
          Affiliates is legally entitled to disclose such Technology and
          technical information and use it in connection with the performance by
          it of its obligations hereunder.

     (f)  "Commercial Product" shall mean any and all products in Final
          Pharmaceutical Form emanating from Lead Compounds and any and all


                                       -2-


   4


          formulations, mixtures or compositions thereof emanating from the
          Research Program pursued pursuant to this Agreement, the making or use
          of which embodies any of BioChem Technology, Oncogene Technology or
          Joint Technology and in respect of which BioChem and Oncogene each has
          rights to commercialize pursuant to this Agreement or any other
          agreement executed between the Parties in furtherance to this
          Agreement.

     (g)  "Commercialization Agreement" shall have the meaning ascribed thereto
          at Section 6.2 hereof.

     (h)  "Commitment Year" shall mean each calendar year during the term of
          this Agreement and, in respect of the First Commitment Year, the
          period commencing on the Effective Date and terminating on December
          31, 1996.

     (i)  "Compound" shall mean any compound in connection with the Field being
          analyzed by the Parties pursuant to the Research Program or developed
          by BioChem and Oncogene and/or their respective Affiliates pursuant to
          the provisions of this Agreement.

     (j)  "Confidential Information" shall mean BioChem Confidential Information
          or Oncogene Confidential Information, as the case may be.

     (k)  "Deficiency Amount" shall have the meaning ascribed thereto at Section
          2.4.1 hereof.

     (l)  "Development Candidate" shall mean a Lead Compound which has been
          designated by the Joint Steering Committee as a potential Commercial
          Product and which should be the subject of a Development Program.

     (m)  "Development Program" shall mean the written development plan to be
          prepared and approved by the Joint Steering Committee describing the
          development and other obligations of each Party in respect of the
          development of any Compound for preclinical and clinical development,
          which plan shall be approved by the Joint Development Committee no
          later than ninety (90) days following the declaration by the Joint
          Steering Committee that a Lead Compound has been designated as a
          Development Candidate, failing which the matter shall be referred to
          the President of BioChem and the Chief Executive Officer of Oncogene
          for discussion and resolution.

     (n)  "Effective Date" shall mean May 1, 1996.

     (o)  "Electing Party" shall have the meaning ascribed thereto at Section
          9.1 hereof.


                                       -3-


   5


     (p)  "Election Notice" shall have the meaning ascribed thereto at Section
          9.1 hereof.

     (q)  "Event of Termination" shall have the meaning ascribed thereto at
          Section 8.2 hereof.

     (r)  "FDA" shall mean the United States Food and Drug Administration.

     (s)  "Field" shall mean, unless otherwise determined by the Joint Steering
          Committee pursuant to Section 2.2, Hepatitis C ("HCV") and Human
          Immunodeficiency Virus ("HIV") and such other viral targets designated
          by the Joint Steering Committee.

     (t)  "Final Pharmaceutical Form" shall mean any presentation of a
          Commercial Product in any final packaged and labelled pharmaceutical
          dosage form suitable for sale to and use by an end user.

     (u)  "Full Development" shall mean the first of the two events described at
          Section 6.2 to occur.

     (v)  "Indemnified Party" shall have the meaning ascribed thereto at Section
          5.10 hereof.

     (v)  "Indemnified Party" shall have the meaning ascribed thereto at Section
          5.10 hereof.

     (w)  "Indemnifying Party" shall have the meaning ascribed thereto at
          Section 5.10 hereof.

     (x)  "Independent Third Party" shall mean any Person other than BioChem,
          Oncogene and/or any of their respective Affiliates.

     (y)  "Initial Term" shall have the meaning ascribed thereto at Section 8.1
          hereof.

     (z)  "Joint Development Committee" or "JDC" shall have the meaning ascribed
          thereto at Section 6.1 hereof.

     (aa) "Joint Research Committee" or "JRC" shall have the meaning ascribed
          thereto at Section 2.4 hereof.

     (ab) "Joint Steering Committee" or "JSC" shall have the meaning ascribed
          thereto at Section 2.4 hereof.


                                       -4-


   6


     (ac) "Joint Technology" shall mean and include all technology and
          information including all inventions, chemical structures and methods
          for synthesis, structure-activity relationships, assay methodology,
          methods, processes, formulae, plans, specifications, characteristics,
          equipment and equipment designs, know how, trade secrets, discoveries,
          formulations and biological, toxicological and clinical data which are
          developed jointly by employees of, or consultants to, BioChem and
          Oncogene, or, solely in respect of the Field, licensed by either of
          the Parties or on behalf of the Parties during the term of this
          Agreement, such that BioChem and Oncogene, each having contributed to
          the development of such technology and technical information, owns an
          undivided interest therein.

     (ad) "Lead Compound" shall mean, subject to the provisions of Section 2.16,
          any Compound designated as a Lead Compound by the Joint Steering
          Committee and which has demonstrated such properties of chemical
          structure, potency, mechanism of action, selectivity and
          non-cytotoxicity as deemed necessary by the JSC for such Compound to
          be a potential candidate for chemical optimization studies.

     (ae) "Net Invoiced Sales Value" shall mean the gross invoice price charged
          for Commercial Products sold by BioChem, Oncogene and/or their
          respective Affiliates and sublicensees to Independent Third Parties,
          less all allowances or credits granted on such sales, including those
          in respect of rejected or returned goods, recalls, transportation
          charges or allowances, insurance charges, normal and customary trade,
          quantity and trade discounts, and taxes or other governmental charges
          on, or measured by, the sale, transportation, or use of Commercial
          Products, which BioChem, Oncogene and/or their respective Affiliates
          and sublicensees have to pay or absorb on such sales.

     (af) "Net Sales" shall mean in the case of any Commercial Products sold in
          a particular country by either Party and/or their respective
          Affiliates and sublicensees in Final Pharmaceutical Form to an
          Independent Third Party:

          (i)  uncompounded with any other active ingredient, the Net Invoiced
               Sales Value of such Commercial Products;

          (ii) compounded with any other active therapeutic ingredient, the
               value of the total declared amount of the Commercial Product
               contained therein, as agreed by discussions between BioChem and
               Oncogene; if the value cannot be agreed upon there it should be
               decided by an independent accountant mutually acceptable to
               BioChem and Oncogene, whose decision shall be binding upon them;
               and


                                       -5-


   7


         (iii) in bulk, the Net Invoiced Sales Value of such Commercial Product
               sold to said Independent Third Party in Final Pharmaceutical
               Form.

     (ag) "Non-Electing Party" shall have the meaning ascribed thereto at
          Section 9.1 hereof.

     (ah) "Notice" shall have the meaning ascribed thereto at Section 9.1
          hereof.

     (ai) "Notice of Opportunity" shall have the meaning ascribed thereto at
          Section 9.1 hereof.

     (aj) "Notifying Party" shall have the meaning ascribed thereto at Section
          9.2 hereof.

     (ak) "Oncogene Confidential Information" shall mean all confidential
          information disclosed to BioChem verbally and subsequently confirmed
          in writing as "confidential" or designated as "confidential" by
          Oncogene or its Affiliates at the time of disclosure to BioChem, to
          the extent that such information as of the date of disclosure to
          BioChem is not (i) demonstrably known to BioChem as evidenced by
          written documentation other than by virtue of a prior confidential
          disclosure to BioChem by Oncogene or its Affiliates, or (ii) disclosed
          in the published literature or otherwise to the public through no
          fault of BioChem, its Affiliates, employees or consultants, or (iii)
          obtained from an Independent Third Party without binder of secrecy,
          provided that such Independent Third Party has no obligation of
          confidentiality to Oncogene or its Affiliates.

     (al) "Oncogene Technology" shall mean and include all technology and
          technical information relating to a Lead Compound or used or furnished
          by Oncogene and/or its Affiliates in respect of the performance by it
          of its obligations hereunder, including all inventions, chemical
          structures and methods for synthesis, structure-activity
          relationships, assay methodology, methods, processes, formulae, plans,
          specifications, characteristics, equipment and equipment designs, know
          how, trade secrets, discoveries, results, formulations and biological,
          toxicological and clinical data and physical, chemical or biological
          material which are developed by employees of, or consultants to,
          Oncogene and/or its Affiliates, prior to or during the term of this
          Agreement or acquired by purchase, license, assignment or other means
          from third parties prior to or during the term of this Agreement that
          is not Joint Technology, but only to the extent that Oncogene or its
          Affiliates is legally entitled to disclose such Technology and
          technical information and use it in connection with the performance by
          it of its obligations hereunder.


                                       -6-


   8


     (am) "Parties" shall mean BioChem and Oncogene; and "Party" shall mean any
          one of them.

     (an) "Patent Expenses" shall mean all external fees and costs incurred by a
          Party in financing the activities relating to a Patent Right,
          including, without limitation, fees and reasonable attorneys' charges
          in connection with the preparation, filing, prosecution, maintenance
          and defense of the Patent Rights and translation charges.

     (ao) "Patent Rights" shall mean all patents and patent applications,
          including any divisional, continuation, continuation-in-part, reissue,
          renewal or extension thereof, or substitute therefor, and the letters
          patent that may be issued thereon, any registration or confirmation of
          such letters patent, relating to any Technology, Lead Compounds or
          Commercial Products, their methods of manufacture or uses of
          intermediates therefor, or formulations thereof. "Oncogene Patent
          Rights" shall mean Patent Rights claiming inventions that are
          conceived and reduced to practice solely by employees of Oncogene or
          its Affiliates. "Joint Patent Rights" shall mean Patent Rights
          claiming inventions that are conceived or reduced to practice jointly
          by employees or consultants of Oncogene and employees or consultants
          of BioChem and of their respective Affiliates. "BioChem Patent Rights"
          shall mean Patent Rights claiming inventions that are conceived and
          reduced to practice solely by employees or consultants of BioChem or
          its Affiliates.

     (ap) "Person" shall mean any individual, corporation, company, cooperative,
          partnership, trust, unincorporated association or any other entity
          which possesses a juridical personality, including any governmental
          authorities or body of competent jurisdiction; and pronouns when
          referring to a Person, shall have a similar extended meaning.

     (aq) "Program Representative" shall mean an employee of a Party designated
          by such Party as its representative for consultation and communication
          with the other party. Any Party may change its Program Representative
          at any time by written notice given to the other Party or designate
          more than one Program Representative provided that each of its
          representatives shall be assigned different responsibilities.

     (ar) "Renewal Period" shall have the meaning ascribed thereto at section
          8.1 hereof.

     (as) "Research Program" shall mean the written research plan annexed hereto
          as Schedule A, as subsequently revised or replaced by the Joint
          Steering Committee, which plan describes the research and other
          obligations to be


                                       -7-


   9


          carried out during each Commitment Year by each of BioChem and
          Oncogene and their Affiliates.

     (at) "Secret Information" shall have the meaning ascribed thereto at
          Section 4.1 hereof.

     (au) "Submitted License" shall have the meaning ascribed thereto at Section
          9.1 hereof.

     (av) "Target" shall have the meaning ascribed thereto at Section 8.2
          hereof.

     (aw) "Technology" shall mean, collectively, BioChem Technology, Oncogene
          Technology and Joint Technology.

     (ax) "Valid Claim" shall mean a claim included among the Joint Patent
          Rights so long as such claim shall not have been irrevocably abandoned
          or held invalid in a final decision of a court or other authority of
          competent jurisdiction.


                                    ARTICLE 2
                                RESEARCH PROGRAM

2.1  General. Subject to the terms and conditions of this Agreement, each of
     BioChem and Oncogene agrees, as of the Effective Date, to undertake and to
     cause its Affiliates to undertake, the Research Program and, in the Field,
     to collaborate in respect thereof.

2.2  Scope. The scope of the Research Program shall comprise the identification,
     research and development of Lead Compounds derived from BioChem Technology,
     Oncogene Technology and Joint Technology or which may be contained in any
     compound library prepared by or on behalf of any Party or to which the
     Parties and their Affiliates hereto have access to in respect of the Field.
     The scope of the Research Program shall also comprise any derivatives, or
     families of derivatives, which may result from the research performed
     during the term of this Agreement, pursuant to the Research Program and
     extend to any other antiviral targets identified by the Joint Steering
     Committee.

2.3  General Obligations of the Parties. During the term of this Agreement, the
     Parties hereto hereby agree to diligently pursue, and to cause their
     respective Affiliates to diligently pursue, the Research Program and to do
     the following:

     (a)  Each of BioChem and Oncogene and/or their respective Affiliates has
          synthesized and isolated and/or shall continue to synthesize and/or
          isolate Compounds within the Field.


                                       -8-


   10


     (b)  Each of BioChem and Oncogene and/or their respective Affiliates shall
          provide the other Party with information concerning, and, if required
          by the JRC, with samples of, Compounds falling within the Field,
          including those which pass primary screening in order that the other
          Party may collaborate in the evaluation for potential activity as
          antiviral agents which target the Field.

     (c)  Each of BioChem and Oncogene shall aid, and shall cause their
          respective Affiliates to aid, the other Party in the fulfillment of
          its obligations hereunder, provide structural chemistry analysis and
          access to combinatorial chemistry technology and scale up potential
          antiviral Compounds for in vitro and in vivo studies, as well as
          provide through in vitro and in vivo evaluations, toxicity and
          mechanisms of action studies in order to select, as promptly as
          possible, Lead Compounds for development.

     (d)  Each of BioChem and Oncogene shall provide to the other Party access
          to appropriate discovery technologies.

     (e)  Each of BioChem and Oncogene shall provide to the other Party access,
          limited for use or access by such other Party in the Field to compound
          libraries made by it or on its behalf or to which it has access to in
          connection with the conduct of the Research Program.

     (f)  Each of BioChem and Oncogene shall provide to the other Party access
          to all Technology within its control or within the control of its
          Affiliates, including technology licensed from Independent Third
          Parties to the extent permitted to do so.

     (g)  Each of BioChem and Oncogene shall, and each shall cause its
          Affiliates to, conduct research and development activities in respect
          of targets identified by the JSC.

     (h)  BioChem and Oncogene agree, on their behalf and on behalf of their
          respective Affiliates, (i) to fulfil their respective obligations
          under, and pursue the goals of, the Research Program and (ii) to
          perform their responsibilities as outlined in the Research Program or
          allocated to it by the Joint Steering Committee.

     (i)  Each of BioChem and Oncogene agrees to provide laboratory facilities
          and equipment and research staff in accordance with the provisions
          hereof to fulfil its obligations hereunder and to give effect to the
          intention of the Parties to collaborate in the research and
          development of Compounds.

     (j)  Oncogene shall provide BioChem and/or its Affiliates with technology
          transfer and access to technological know how related to existing
          robotic screening technology, to permit the implementation of
          necessary screening infrastructures,


                                       -9-


   11


          the whole in accordance with the Technology Transfer and License
          Agreement to be negotiated diligently and in good faith by the parties
          and to be annexed hereto as Schedule B.

2.4  Joint Steering Committee.

     2.4.1  Purpose. A steering committee (the "Joint Steering Committee" or
            "JSC") is hereby established by BioChem and Oncogene to manage all
            business and commercial aspects between the Parties pursuant to this
            Agreement (including financial planning, resource allocation,
            prioritization, addition of new targets within the Field), agree
            upon and assign responsibilities (other than specific scientific
            tasks) within the Research Program to each Party, approve the annual
            budgets to be spent by each Party during any Commitment Year and
            review and monitor work conducted by the Joint Research Committee
            and to process and approve technical and scientific recommendations
            of both the JRC and JDC. In particular, the JSC will be responsible,
            throughout the term of this Agreement, for (i) reviewing the
            Research Program and revising it as necessary, (ii) for preparing,
            monitoring and revising on an annual basis the budgets necessary for
            the performance by the Parties of their obligations pursuant to the
            Research Program and this Agreement, (iii) monitoring the
            fulfillment by each Party of its obligations pursuant to this
            Agreement, (iv) designating any Compounds as Lead Compounds, (v)
            determining the allocation between the Parties of their resources in
            connection with the conduct of the Research Program, (vi)
            designating Development Candidates, (vii) negotiating and
            soliciting, if appropriate, third parties to collaborate for
            purposes of conducting the Research Program, (viii) determining on
            an annual basis the amount, if any, (the "Deficiency Amount") in
            order that contributions of both Parties during any Commitment Year
            referred to in Section 2.8 be approximately the same, and (ix)
            determining the rules and principles applicable for purposes of the
            accounting and maintenance of books and records by both Parties
            including harmonization of the Canadian and American GAP. Either
            Party may in committee propose that the Parties commence development
            of a promising Lead Compound.

     2.4.2  Expansion of Research Program. Save for the first Commitment Year,
            in which case the Research Program is defined as set out in Schedule
            A of this Agreement and a general outline in respect of the other
            Commitment Years, the JSC shall define the Research Program in each
            Commitment Year and amend, if it deems appropriate, the Field.

     2.4.3  Composition. BioChem and Oncogene each shall appoint, in their sole
            discretion, two (2) members to the JSC. Alternates or replacements
            of any Party may be appointed by such Party at any time by notice to
            the other Party. Initially the members shall be:


                                      -10-


   12


            for BioChem:                       *

            for Oncogene:                      *


     2.4.4  Voting. Each member of the JSC shall have one vote, and decisions
            shall be made by unanimity. Where a vote on any decision does not
            produce a consensus between all members, the matters at issue shall
            be submitted to the President of BioChem and the Chief Executive
            Officer of Oncogene for discussion and resolution.

     2.4.5  Chair. A Chairperson shall be nominated alternatively by BioChem and
            Oncogene for one year terms, the first term being served by a
            nominee appointed by Oncogene.

     2.4.6  Meetings. Meetings shall be convened at least two times a year at
            locations and times determined by a JSC resolution. Representatives
            of Oncogene, BioChem, or both, in addition to members of each of the
            Parties on the JSC, may attend meetings but shall have no voting
            rights. Meetings shall be held alternatively at each Party's
            facilities. Minutes of each meeting shall, be prepared by a
            representative of the Parties on an alternate basis and distributed
            to all members of the JSC within thirty (30) days following any
            meeting.

     2.4.7  Expenses. The Parties will each bear their own expenses and those
            expenses related to the participation of their appointees of the
            JSC.

2.5  Joint Research Committee.

     2.5.1  Purpose. A research committee (the "Joint Research Committee" or
            "JRC") is hereby established by BioChem and Oncogene to (i) review
            and discuss scientific questions which may arise in connection with
            the execution of the Research Program and scientific inventions,
            break throughs or developments in the Field made pursuant to the
            Research Program, (ii) manage and deal with such other
            responsibilities which may, from time to time, be delegated to it by
            the Joint Steering Committee, (iii) recommend to the JSC any
            Compound as Lead Compounds, and (iv) recommend to the JSC any Lead
            Compounds as Development Candidates.

     2.5.2  Composition. BioChem and Oncogene each shall appoint, in their sole
            discretion, three (3) members to the JRC. Replacements of any Party
            may be

- --------
*    This portion redacted pursuant to a request for confidential treatment.


                                      -11-


   13


            appointed by such Party at any time by notice to the other Party.
            Initially, the members shall be:

            for BioChem:                       *

            for Oncogene:                      *

     2.5.3  Decisions. Any decision of the JRC shall require consensus between
            all members, failing which the matter of issue shall be submitted to
            the Joint Steering Committee for discussion and resolution.

     2.5.4  Meetings. Meetings of the JRC shall be held at least four times per
            year at locations and times determined unanimously by the JRC.
            Minutes of each meeting shall be prepared and distributed to all
            members of the JRC.

     2.5.5  Reports. During the term of this Agreement, each Party shall cause
            its members of the JRC to prepare and submit to the Joint Steering
            Committee summary reports within thirty (30) days following the end
            of each calendar quarter, describing the progress under the Research
            Program during the preceding calendar quarter and recommending any
            qualified Compounds to be designated as Lead Compounds.

2.6  Reports. During the term of this Agreement, BioChem and Oncogene each shall
     provide to the JSC and to the other Party access to primary data derived or
     used in connection with the performance by it of its obligations hereunder
     and the following:

     (a)  minutes of each JSC meeting to be distributed within fifteen (15) days
          of each meeting;

     (b)  on an annual basis and no later than sixty (60) days following the end
          of each Commitment Year, a statement of all costs and expenses
          incurred by such Party and its Affiliates pursuant to Section 3.1; and
          a summary written reports describing the work accomplished under the
          Research Program and discussing and evaluating the results of such
          work.

2.7  Laboratory Facilities. BioChem and Oncogene each agree to provide, or cause
     their respective Affiliates, suitable laboratory facilities and equipment
     for carrying out its obligations under the Research Program and this
     Agreement.

2.8  Research Staff. Each of BioChem and Oncogene shall, no later than fifteen
     (15) days following execution of this Agreement, appoint research team
     comprised of such

- --------
*    This portion redacted pursuant to a request for confidential treatment.


                                      -12-


   14


     number of suitably qualified Ph.D. scientists and other suitable qualified
     scientists and other personnel as may be needed and agreed to between the
     Parties from time to time each to achieve the goals of the Research
     Program, it being understood that over the term of this Agreement, each
     Party shall have contributed, in terms of out-of-pocket expenses incurred
     by the Parties and their Affiliates (including salaries and such other
     costs and expenses referred to in Section 3.1 hereof), approximately
     equally in connection with the performance of their obligations under the
     Research Program and this Agreement.

2.9  Inspection. BioChem and Oncogene shall each have the right to arrange for
     its employees, external consultants, and such other persons as it may
     reasonably delegate, to visit the other Party at its offices and
     laboratories and to discuss work under the Research Program and its results
     in detail with the other Party's Program Representative, the staff, and
     consultants of the other Party; provided that such visits are during normal
     business hours, have been arranged on not less than five (5) business days
     notice and shall not unreasonably interrupt the operations of the other
     Party.

2.10 Patent and Confidential Information Agreements. Each of BioChem and
     Oncogene shall require all of its employees, all employees of its
     Affiliates and all independent Third Parties involved in, or associated
     with the Research Program to have executed an agreement for the assignment
     of inventions and for the protection of Secret Information in such
     reasonable form as may from time to time be used by BioChem and Oncogene
     for such purpose.

2.11 Flexibility. In conducting its research and other obligations under this
     Agreement, each of BioChem and Oncogene shall have and maintain sufficient
     flexibility to allow a shift in effort and emphasis within the Research
     Program that will, in the opinion of the JSC, achieve the best results in
     the attainment of the objectives of the Research Program.

2.12 Arrangements with Independent Third Parties. Each of BioChem and Oncogene
     shall have the right to contract with its Affiliates and Independent Third
     Parties for the performance of work, or the provisions of consulting
     services, in connection with the Research Program provided that the other
     Party shall have the opportunity to review, comment on and approve any such
     proposed contract with Independent Third Parties prior to its execution.
     Approval of any such contract shall not be unreasonably withheld, and a
     response to a request for approval shall be provided within thirty (30)
     days after its receipt by the other Party. Each Party will provide the
     other Party with a complete copy of each such executed contract. The costs
     incurred by any of BioChem or Oncogene, as the case may be, in respect of
     such contract and the work and consultation services to be performed
     thereunder shall be borne by the Party having contracted with such
     Affiliate or Independent Third Party. Each Party represents and warrants to
     the other Party that, as at the date hereof, Schedule C


                                      -13-


   15


     annexed hereto contains a full list of all arrangements with Independent
     Third Parties relating to Technology and hereby agrees to use its best
     efforts to obtain consent, where required, to disclose to the other Party
     such Technology.

2.13 No Independent Research within the Scope of the Research Program. During
     the term of this Agreement, the Parties to this Agreement shall not
     undertake independent research, either directly or indirectly through any
     Affiliate or any other Person, in any area falling within the Field or
     which competes with any Compound being developed pursuant to this Agreement
     without the consent of the Joint Steering Committee.

2.14 Other Research Permitted. The Parties and their Affiliates have the right
     to conduct research on Compounds and use Joint Technology outside the
     Field, notwithstanding their potential utility in the treatment of
     illnesses or disorders being the object of the Field, it being understood
     that any such Party shall not, in the course of such use or conduct, take
     or omit to take any action which would cause prejudice to the other Party.

2.15 Clinical Data. All clinical data obtained from studies conducted pursuant
     to the Research Program and the Development Program shall be jointly owned
     by BioChem and Oncogene and may be used by either Party and its Affiliates
     outside the Field, it being understood that any such Party shall not, in
     the course of such use or conduct, take or omit to take any action which
     would cause prejudice to the other Party or to the Research Program.

2.16 Lead Compounds. Notwithstanding any provision of this Agreement, if a Lead
     Compound is not designated as a Development Candidate within two (2) years
     following its designation by the JSC as a Lead Compound, such Lead Compound
     shall cease to be considered a Compound within the meaning of this
     Agreement and all rights, title and interest to such Compound shall be
     returned to the Party having contributed such Compound to the Research
     Program and the other Party shall cease to have any right in respect of
     such Compound.


                                    ARTICLE 3
                   COSTS AND EXPENSES OF THE RESEARCH PROGRAM

3.1  Payment of Costs and Expenses. Each Party shall be responsible for all
     expenses and costs incurred by it and its employees, its Affiliates and its
     consultants in the performance of such Party's obligations hereunder,
     including, without limitation, in respect of Patent Expenses relating to
     its Patent Rights, salaries of its employees, fees of its consultants,
     materials, equipment and administrative expenses and travel costs of its
     employees, employees of its Affiliates and consultants. A Party shall
     reimburse the other Party one-half of the Deficiency Amount within ninety
     (90) days from the end of any year, except in respect of the first three
     years of the term of this Agreement where


                                      -14-


   16


     such calculation and payment shall be made for such period within thirty
     (30) days of the third anniversary date of this Agreement.


                                    ARTICLE 4
                               SECRET INFORMATION

4.1  General. Each of BioChem and Oncogene recognizes that the other Party's
     Confidential Information, BioChem Technology, Oncogene Technology, Joint
     Technology and the results of the Research Program (collectively, the
     "Secret Information") all constitute highly valuable proprietary
     confidential information.

4.2  Treatment of Secret Information.

     (a)  Subject to the disclosure obligations set forth in this Article 4,
          each of BioChem and Oncogene agree that, during the term of this
          Agreement, each Party will maintain, and shall cause its Affiliates to
          maintain, the Secret Information in confidence and shall not disclose,
          divulge or otherwise communicate such Secret Information to
          Independent Third Parties (except its own Confidential Information, or
          its own Technology), or use it for any purpose except pursuant to, and
          in order to carry out the terms and objectives of this Agreement.
          Notwithstanding any provision of an Agreement, BioChem and Oncogene
          hereby agree that they shall, together with their Affiliates, be
          entitled to use, outside of the Field, know how obtained during the
          term of this Agreement (other than any information relating to Lead
          Compounds).

     (b)  Each Party further agrees to exercise, and shall cause its Affiliates
          to exercise, every reasonable precaution to prevent and restrain the
          unauthorized disclosure of such Secret Information by any of its
          directors, officers, employees, consultants, subcontractors,
          sublicensees or agents or those of its Affiliates.

     (c)  Each Party shall maintain, and shall cause its Affiliates to maintain,
          the other Party's Confidential Information in confidence. During the
          term of this Agreement and for a period of ten (10) years thereafter
          each Party shall not disclose, divulge or otherwise communicate the
          other Party's Confidential Information to Independent Third Parties
          except in the event of an assignment by such Party of its rights
          hereunder in accordance with the provisions hereof.

4.3  Press Releases and Announcements.

     (a)  Neither Oncogene or BioChem shall, and Oncogene and BioChem shall
          cause their Affiliates not to, issue any press release or other public
          announcement relating to or disclosing any Secret Information (other
          that its own Confidential Information or its own Technology) without
          the prior written consent of the


                                      -15-


   17


          other Party, except where such announcements or press releases are
          required by law for the purposes of securing the registration of, and
          or governmental approval to market, in accordance with this Agreement,
          any Commercial Products, or for the procurement of patent protection
          of a Joint Patent Right. Notwithstanding the foregoing, each Party
          shall have the right to disclose the existence of this Agreement in
          any prospectus, offering memorandum or other document or filing
          required by applicable securities laws or other applicable law or
          regulation.

     (b)  Where a press release or public announcement is required by law, the
          Party required to disclose Secret Information shall inform the other
          Party and provide it with a copy of any such press release or public
          announcement.

     (c)  Each of BioChem and Oncogene shall inform the other Party of any
          Secret Information which it is required to disclose.

4.4  Contracts with Independent Third Parties. If BioChem or Oncogene or any of
     their Affiliates, enters into any contract with an Independent Third Party
     involving disclosure of Secret Information, it shall first obtain the
     approval of the other Party, and, after signing, provide a copy of such
     contract to the other Party.

4.5  Publications. Notwithstanding the provisions of Sections 4.1, 4.2 and 4.3,
     a Party or its Affiliates, following review by the JSC and the JRC, may
     submit the results obtained in the course of the Research Program for
     publication subject to the following applicable restrictions:

     (a)  the Party intending to publish, directly or indirectly, shall provide
          the other Party with a copy of the manuscript (including any abstract)
          for any proposed publication or presentation no later than thirty (30)
          days prior to the submission of such proposed publication or
          presentation to a journal, editor or other Independent Third Party for
          the purpose of review and comment. The other Party shall have the
          right to request modifications of any manuscript to be published or
          presented, if such manuscript will jeopardize a Patent Right, patent,
          trade secret, or other proprietary right related to this Agreement. If
          the Party intending to publish does not agree with such modification,
          the Parties shall consult independent patent counsel satisfactory to
          both Parties whose determination shall be final and binding on the
          Parties.

     (b)  If such other Party informs the publishing Party within thirty (30)
          days of receipt of an advance copy of a proposed publication that such
          publication in its reasonable judgement could be expected to have
          material adverse effect on Joint Patent Rights or Secret Information,
          the publishing Party shall delay or prevent such publication as
          proposed. In the case of inventions, such Party shall delay or cause
          the author to delay submission of the work for publication


                                      -16-


   18


          or other public disclosure for up to six (6) months after filing of a
          patent application.


                                    ARTICLE 5
                          INTELLECTUAL PROPERTY RIGHTS

5.1  General. The following provisions relate to inventions and know how
     developed, directly or indirectly through Affiliates, by BioChem or
     Oncogene or BioChem and Oncogene, jointly, during the course of carrying
     out the Research Program.

5.2  Research. Except for that which arises within or as a result of the
     Research Program and this Agreement, all Technology, information, data,
     discoveries and inventions arising and Programs of research carried out by
     Oncogene and its Affiliates, on the one hand, or by BioChem and its
     Affiliates, on the other hand, and all intellectual property rights
     relating thereto shall be the exclusive property of Oncogene or BioChem and
     their Affiliates, as the case may be, and shall be returned to such Party
     upon termination of this Agreement, except as provided herein.

5.3  Maintenance of Joint Patent Rights. BioChem and Oncogene shall be jointly
     responsible for taking all necessary actions to obtain, sustain and enforce
     patent protection for joint Patent Rights [excluding patent applications
     outside the Field] and for those inventions arising from the Research
     Program including, without derogation from the foregoing:

     (a)  filing applications for patents on any patentable inventions included
          within Joint Patent Rights; provided that any Party wishing to file
          such application ding reform the other Party and the Joint Steering
          Committee regarding countries in which such applications should be
          filed; the JSC shall determine which countries where such applications
          shall be made;

     (b)  prosecuting all pending and new patent applications included within
          Joint Patent Rights and responding to opposition or any other form of
          action for invalidity or revocation of Patent Rights filed by
          Independent Third Parties against the grant of patents for such
          applications; and

     (c)  maintaining in force any patents included within Joint Patent Rights
          by duly filing all necessary papers and paying any fees required by
          the patent laws of the particular country, in which such patents were
          granted.

     Each Party undertakes to provide all necessary assistance to the JSC and
     the other Party to achieve the objectives of this Section 5.3. Both Parties
     shall continue, through patent agents, to prosecute and maintain all
     relevant patent property, including that in the U.S.A. and Canada, relating
     to Technology within the Field in full


                                      -17-


   19


     consultation with the JSC. Each Party shall keep the other Party informed
     as to all developments with respect to Joint Patent Rights by copying all
     documents and correspondence related to such protection and maintenance.

     If the JSC decides to abandon a patent application or an issued patent
     included within Joint Patent Rights, any Party whose appointees on the JSC
     shall have voted against such abandonment shall have the option, at its
     expense, of continuing to prosecute any such patent application or of
     keeping the issued patent in force. If a Party so elects to file, at its
     own expense, patent applications in respect of Joint Patent Rights in
     countries in which the JSC has elected not to file, such Party shall have
     the unrestricted right to negotiate licenses with Independent Third Parties
     in such non-elected countries or exploit it directly.

5.4  Infringement. Each Party shall promptly inform the other Party of any
     suspected infringement of any Joint Patent Rights. During the term of this
     Agreement, both Parties shall have the right to institute an action for
     infringement of the Joint Patent Rights against such Independent Third
     Party in accordance with the following:

     (a)  both Parties shall institute suit jointly, the suit shall be brought
          in both their names and the out-of-pocket costs thereof shall be borne
          equally. Any recovery or settlement received by a Party shall be
          shared equally. The JSC shall decide upon the manner in which any
          Party shall exercise control over such action. Any Party may, if it so
          desires, also be represented by separate counsel of its own selection,
          the fees for which counsel shall be paid by it.

     (b)  in the absence of agreement to institute a suit jointly, any Party may
          institute suit, and, at its opinion, name the other Party as a
          plaintiff. The Party instituting shall bear the entire costs of such
          litigation, including defending any counterclaims brought against the
          other Party and paying any judgments rendered against the other Party,
          and shall be entitled to retain the entire amount of any recovery of
          settlement.

     (c)  should either Party commence a suit under the provisions of this
          Section 5.4 and thereafter elect to abandon such suit, the abandoning
          Party shall give timely notice to the other Party who may, if it so
          desires, continue prosecution of such suit, provided that the sharing
          of expenses and any recovery in such suit shall be as agreed upon
          between both Parties.

5.5  Costs for Applying, Prosecuting and Maintaining. The costs of applying for,
     prosecuting and maintaining patent applications and patents as specified in
     Section 5.3 shall be borne equally by BioChem and Oncogene.

5.6  Disclosure of Inventions. Each of BioChem and Oncogene shall promptly
     inform the other Party of all inventions and Joint Technology that are
     conceived, made or


                                      -18-


   20


     developed in the course of carrying out the Research Program by its
     respective employees, its Affiliates or consultants, whether invented
     solely or jointly with employees of or consultants to the other Party.

5.7  Ownership of Joint Intellectual Property. BioChem and Oncogene shall
     jointly own the entire right, title and interest in all Technology,
     patents, know how and other rights in any idea, design, invention,
     discovery, improvement or other creation, including any Compound, method or
     apparatus conceived, reduced to practice of developed by BioChem and
     Oncogene, in the course of the Research Program. The commercial
     exploitation by BioChem and Oncogene as joint owners of their rights is
     subject to the provisions of Article 6 of this Agreement.

5.8  Copies of Patent Applications. [Each Party shall provide to the other Party
     copies of all patent applications for Joint Patent Rights prior to filing,
     for the purpose of obtaining comments and advice from the other Party's
     patent advisors and the other Party's approval to so file which approval
     shall be provided within a reasonable time. Upon the other Party's
     approval, such Party shall be free to file said patent applications covered
     by this Agreement. Such Party shall also consult with the other Party on
     the prosecution of said applications and provide to such Party copies of
     all documents relating to the prosecution of said applications. Such Party
     shall provide to the other Party every six (6) months a report detailing
     the status of all patent applications that are part of Joint Patent
     Rights.]

5.9  Other Patent Rights. Each Party shall be responsible for taking all
     necessary actions to obtain, sustain and enforce patent protection for
     those of its Patent Rights which are not Joint Patent Rights or Patent
     Rights of the other Party and those outside the scope of the Research
     Program, including the following:

     (a)  filing applications for such patents on any patentable inventions;

     (b)  prosecuting all pending and new patent applications and responding to
          opposition or any other form of action for invalidity or revocation or
          Patent Rights filed by Independent Third Parties against the grant of
          patents for such application;

     (c)  maintaining in force any patents by duly filing all necessary papers
          and paying any fees required by the patent legislation of the
          particular country in which such patents were granted.

     In the event that a Party institutes suit to protect its own Patent Rights
     against suspected infringement, it shall notify the other Party who shall,
     have the option, to be exercised in writing no later than thirty (30) days
     from receipt of the notice, to elect to assume 50% of all expenses relating
     to such suit, including attorneys' fees, in which case any recovery or
     settlement received by the Party having instituted suit shall be


                                      -19-


   21


     shared equally by both Parties. The Party having instituted suit shall have
     the authority to make all decisions concerning such suit, including without
     limitation, the right to compromise the claim.

5.10 Indemnification. Each Party (the "Indemnifying Party") shall indemnify the
     other Party, its directors, officers, employees and consultants (the
     "Indemnified Party") from and against any and all claims, demands, losses,
     liabilities, expenses or damages which the Indemnified Party may suffer,
     pay or incur as a result of claims, demands or suits against the
     Indemnified Party arising or alleged to arise by reason of or in connection
     with any and all personal injury and property damage caused or contributed
     to, in whole or in part, by the Indemnifying Party's actions or
     infringement.


                                    ARTICLE 6
                        DEVELOPMENT AND COMMERCIALIZATION

6.1  Decision to Commercialize. The Joint Steering Committee has the authority,
     following recommendation from the JRC, to determine that a Lead Compound is
     suitable for development and therefore qualifies as a Development
     Candidate. This authority of the JSC is governed by Section 2.5. No later
     than thirty (30) days following the determination that the first Compound
     is suitable for development the Parties shall establish a development
     committee (the "Joint Development Committee").

6.2  Commercialization Agreement. Where a Lead Compound has been designated as a
     Development Candidate, the Parties shall enter into a commercialization
     agreement (the "Commercialization Agreement") for the development and
     commercialization of that Compound as soon as possible after the first to
     occur of the following events: (i) the decision to enter into a full
     clinical development program as approved by the JSC, or (ii) the beginning
     of Phase III clinical studies, conducted to support the application for
     marketing approval of the Development Candidate for an indication.

6.3  Content of Commercialization Agreement. The Commercialization Agreement
     shall provide that the Parties will jointly exploit any Commercial Products
     in the Field. The mechanism for commercialization will be negotiated
     between the Parties through good faith negotiations and shall take into
     account the respective contributions of the Parties pursuant to Section 2.8
     which should, unless agreed to by the Parties, be essentially the same. The
     Parties agree that they shall both have commercialization rights in the
     United States of America and Europe and that BioChem shall have the
     commercialization rights in Canada. The Commercialization Agreement shall
     provide that rights thereunder may be sublicensed to a third party by
     mutual agreement of the Parties.


                                      -20-


   22


6.4  Joint Development Committee.

     6.4.1  Purpose. The Joint Development Committee purpose is to manage, agree
            upon and assign specific responsibilities within the Development
            Program to each party. The Joint Development Committee will be
            responsible, throughout the duration of the Development Program, for
            preparing and reviewing the Development Program and revising it as
            necessary and will participate in all aspects of the planning and
            development work carried out on any Development Candidate as well as
            the information and data generated by that work. The Joint
            Development Committee shall, when establishing the Development
            Program, determine the responsibilities of each Party in seeking
            regulatory approvals and in particular, notwithstanding that the JRC
            will be responsible for nominating any Lead Compound for full
            clinical development, and that such nomination will require approval
            of the JSC.

     6.4.2  Composition. BioChem and Oncogene each shall appoint, in their sole
            discretion, three members to the Joint Development Committee.
            Replacements of any Party may be appointed by such Party at any time
            by notice to the other Party.

     6.4.3  Voting. Each member of the Joint Development Committee shall have
            one vote, and decisions shall be made by unanimity. Where a vote on
            any decision does not produce a consensus between all members, the
            matters at issue shall be submitted to the President of BioChem and
            the Chief Executive Officer of Oncogene for discussion and
            resolution.

     6.4.4  Chair. A Chairperson shall be nominated alternatively by BioChem and
            Oncogene for one year terms, the first term being served by a
            nominee appointed by BioChem.

     6.4.5  Meetings. Meetings shall be convened at least four times a year at
            locations and times determined by a Joint Development Committee
            resolution. Representatives of Oncogene, BioChem, or both, in
            addition to members of each of the Parties on the Joint Development
            Committee, may attend meetings but shall have no voting rights.
            Meetings shall be held alternatively at each Party's facilities.

     6.4.6  Expenses. The Parties will each bear their own expenses and those
            expenses related to the participation of their appointees of the
            Joint Development Committee.

6.5  No Support. If any Party's representatives on the JSC, JRC or the Joint
     Development Committee declines to support the advancement of a Compound to
     a Lead Compound stage or a Lead Compound to a development stage for reasons
     which may include, but


                                      -21-


   23


     are not limited to, the proposed market being outside the scope of its
     interest or being too small, and the other Party's representatives on the
     JSC, JRC or the Joint Development Committee support the advancement of said
     Compound to a Lead Compound stage or of a Lead Compound to a development
     stage with an objective of commercialization of said Compound, then the
     JSC, JRC or the Joint Development Committee, as the case may be, shall
     record a notice (a "Notice of Opportunity") in the minutes of the meeting
     where the representatives express such positions. For a period of sixty
     (60) days after the date of such Notice of Opportunity the Parties shall
     negotiate in good faith to resolve the issue in a mutually agreeable
     manner. If the Parties are unable to resolve the issue then for a period of
     one hundred and twenty (120) days thereafter the other Party having
     supported the advancement of the Compound or the Lead Compound (the
     "Notifying Party") shall have a first right to undertake worldwide
     development and commercialization of such Compound or Lead Compound. Upon
     the Notifying Party exercising such right, such Party shall be granted a
     worldwide royalty license from the other Party which shall contain usual
     term and conditions for agreements of that type and provide for the payment
     by the Notifying Party to the other Party of royalties of * of Net Sales to
     be paid within thirty (30) days following the end of any calendar quarter.
     If, at any time, a Party which has commenced development on a Compound or a
     Lead Compound, halts such development, then the other Party shall have the
     right to undertake development of said Compound or Lead Compound, under the
     same mechanism and subject to the same conditions as described in this
     Section 6.5.


                                    ARTICLE 7
                          OTHER RESEARCH, VENTURES ETC.

7.1  Acquisition of Rights from Third Parties. During the term of this
     Agreement, BioChem and Oncogene shall promptly notify the other in writing
     of any and all opportunities to acquire from Independent Third Parties,
     whether by license, assignment or otherwise, technology or patents which
     may be useful in, or may relate to, the purposes of the Research Program.

     BioChem and Oncogene shall work together in a manner mutually agreeable and
     beneficial to secure technology or patents which they have determined would
     be useful in or relate to the purpose of the Research Program. Each Party
     shall (1) inform the other Party of all third party technology or patents
     that may be useful or relate to the Research Program, (2) solicit the other
     Party's participation and approval in the formulation and implementation of
     a strategy for securing such technology or patents and, (3) provide status
     reports on the progress of such strategy.

- --------
*    This portion redacted pursuant to a request for confidential treatment.


                                      -22-


   24


                                    ARTICLE 8
                 TERM, EXTENSION, TERMINATION AND DISENGAGEMENT

8.1  Term. The initial term (the "Initial Term") of this Agreement shall be five
     (5) years, commencing on the Effective Date; provided, however, that either
     Party may terminate this Agreement at any time following the third
     anniversary of the Effective Date by providing the other Party with one
     hundred and eighty (180) days' prior written notice. Following the
     expiration of the Initial Term, this Agreement shall be automatically
     renewed for additional successive one-year periods (each, a "Renewal
     Period") unless either Party gives the other notice of its intent not to
     renew one hundred and twenty (120) days prior to the expiration of the
     Initial Term or any Renewal Period, as the case may be.

8.2  Events of Termination. The following events shall constitute events of
     termination (each an "Event of Termination"):

     (a)  Any representation or warranty by BioChem or Oncogene in this
          Agreement proves incorrect, or inaccurate, in any material respect
          when made or deemed made as determined by an independent arbitrator
          and the defaulting Party does not remedy or cure such incorrect on
          inaccurate representation or warranty within sixty (60) days following
          written notice from the other Party of such breach.

     (b)  BioChem or Oncogene fails to perform or observe any term of this
          Agreement or Schedules thereto and such failure remains unremedied for
          a period of sixty (60) days following written notice thereof from the
          non-defaulting Party or such longer period if the defaulting Party is
          diligently taking action to remedy such failure.

     (c)  BioChem or Oncogene makes an assignment for the benefit of its
          creditors, becomes insolvent, files a petition in bankruptcy,
          petitions or applies to any tribunal for the appointment of a
          custodian, receiver or any trustee for it or a substantial part of its
          assets, or commences any proceeding under any bankruptcy,
          reorganization, arrangement, readjustment of debt, dissolution or
          liquidation law or statute of any jurisdiction, whether now or
          hereafter in effect; or if there has been filed any such petition or
          application against BioChem or Oncogene, or any such proceeding has
          been commenced against it, in which an order for relief is entered or
          which remains undismissed for a period of thirty (30) days or more; or
          BioChem or Oncogene by any act or omission indicates its consent to,
          approval of or acquiescence in, any such petition, application or
          proceeding or order for relief or the appointment of a custodian,
          receiver or any trustee for it or any substantial part of any of its
          properties, or is the subject of any such custodianship, receivership
          or trusteeship that continues undischarged for a period of thirty (30)
          days or more.


                                      -23-


   25


     (d)  BioChem or Oncogene generally fails to pay its debts as such debts
          become due.

     (e)  Either of BioChem or Oncogene assigns this Agreement and that portion
          of its business related to the Research Program to a company which
          sells products or services, which are in the reasonable opinion of the
          other Party, in direct competition with BioChem or Oncogene.

     (f)  In respect of any Party, if a Person acquires (the "Acquisition")
          shares of such Party (the "Target"), directly or indirectly, which
          carry the right to cast, in the aggregate, more than 50% of the votes
          for the election of directors or, if such Person is, in the reasonable
          opinion of the Party, a competitor of such other Party, more than 35%
          of the votes for the election of directors.

     For purposes of this Section 8.2, a Person shall be deemed to be a
     competitor or to be in competition if such Person or its Affiliates is,
     directly or indirectly, considered a biotechnological or pharmaceutical
     company which carries research and development activities in the Field.


                                    ARTICLE 9
                           CONSEQUENCES OF TERMINATION

9.1  Licenses upon Termination. Where this Agreement is terminated pursuant to
     Section 8.1, each Party's intellectual property rights shall revert to such
     Party and the Parties shall execute cross-licensing agreements for any
     Joint Patent Rights or Joint Technology arising from this Agreement.

     The Parties shall immediately following the delivery of a notice pursuant
     to Section 8.1, negotiate in good faith such cross-licensing agreements. If
     the Parties fail to negotiate and sign cross-licensing agreements before
     the expiration of a period of one hundred and eighty (180) days following
     delivery of the notice pursuant to Section 8.1, either Party (the "Electing
     Party") may, by written notice (the "Notice") accompanied by a Submitted
     License (as defined hereinafter) at its option offer to the other Party:
     (i) to have an exclusive worldwide license for the Joint Patent Rights or
     Joint Technology, the whole in accordance with the terms and conditions of
     an agreement to be submitted by the Electing Party to the other Party (the
     "Submitted License"); or (ii) to grant to the other Party (the
     "Non-Electing Party") an exclusive worldwide license for the Joint Patent
     Rights or Joint Technology in accordance with the Submitted License.

     The Non-Electing Party shall have the option to either (i) grant to the
     Electing Party a worldwide exclusive license for the Joint Patent Rights or
     Joint Technology in accordance with the terms and conditions of the
     Submitted License, or (ii) to have an


                                      -24-


   26


     exclusive worldwide license for Joint Patent Rights or Joint Technology in
     accordance with the terms of the Submitted License.

     Such election may be made by the Non-Electing Party in writing, addressed
     to the Electing Party (the "Election Notice") within ninety (90) days
     following receipt of the Notice, failing which he shall be deemed to have
     elected to grant the Electing Party a license upon the term of the
     Submitted License. The Parties shall execute a license based on the
     Submitted License within six (6) months following receipt by the Electing
     Party of the Election Notice.

9.2  Termination upon the Occurrence of an Event of Termination. Upon the
     occurrence of any Event of Termination set forth in Section 8.2, for a
     period of sixty (60) days from the date of the occurrence of any Event of
     Termination the Parties shall negotiate in good faith to resolve the issue
     in a mutually agreeable manner and if the Parties are unable to resolve the
     issue then the Party not responsible for such Event of Termination may, by
     notice to the other Party, terminate this Agreement. In the event of any
     termination by a Party (the "Notifying Party") pursuant to Section 8.2, all
     information and data, including Joint Technology and Joint Patent Rights,
     accumulated throughout the term of this Agreement shall become the sole
     exclusive property of the Notifying Party, and the other Party shall
     execute and perform all transfers and assignments to the Notifying Party
     which are required by law. Notwithstanding the foregoing, upon the
     occurrence of an Event of Termination described in Section 8.2(f), the
     Party, the shall of which are not being acquired may, at its option, in
     which case the other Party shall not be considered in default hereunder,
     (i) require the Target to pay, in which event the Target shall pay,
     royalties on Net Sales made by such Target and its Affiliates in the amount
     of * for Commercial Products which where not, at the time of the
     Acquisition, in Full Development or * for Commercial Products which where,
     at the time of the Acquisition, in Full Development, and (ii) require the
     Target to reimburse the other Party for all costs and expenses incurred by
     such Party in the performance of its obligations under this Agreement in
     respect of Commercial Products which have not reached Full Development.

9.3  Survival of Obligations: Return of Confidential Information.
     Notwithstanding any termination of this Agreement, the obligations of the
     Parties with respect to the protection and non-disclosure of Confidential
     Information shall survive and continue to be enforceable. Upon any
     termination of this Agreement, each Party shall promptly return to the
     other Party all of that other Party's Confidential Information, and all
     copies thereof. Biochem and Oncogene acknowledge that after termination of
     this Agreement each Party will be free to use its own Confidential
     Information and Technology without restriction. 

- -------- 
*    This portion redacted pursuant to a request for confidential treatment.


                                      -25-


   27


                                   ARTICLE 10
                         REPRESENTATIONS AND WARRANTIES

Each of BioChem and Oncogene represents and warrants as follows:

     (a)  Good Standing. It is a corporation duly organized, validly existing
          and is in good standing under the laws of its jurisdiction of
          incorporation and has all requisite power and authority, corporate or
          otherwise, to conduct its business as now being conducted, to own,
          lease and operate its properties and to execute, deliver and perform
          this Agreement.

     (b)  Proper Authorization. The execution, delivery and performance of this
          Agreement have been duly authorized by all necessary corporate action
          and do not and win not (a) require any consent or approval of its
          stockholders, (b) violate any provision of any law, rule, regulation,
          order, writ, judgement, injunction, decree, determination or award
          presently in effect having applicability to it or any provision of its
          charter or by-laws or (c) result in a breach of or constitute a
          default under any material agreement, mortgage, lease, license, permit
          or other instrument or obligation to which it is a party or by which
          it or its properties may be bound or affected.

     (c)  Binding Agreement. This Agreement is a legal, valid and binding
          obligation of it enforceable against it in accordance with its terms
          and conditions, except as such enforceability may be limited by
          applicable bankruptcy, insolvency, moratorium, reorganization or
          similar laws, from time to time in effect, affecting creditors' rights
          generally.

     (d)  Absence of Conflict. It is not under any obligation to any Person,
          contractual or otherwise, that is conflicting or inconsistent in any
          respect with the terms of this Agreement or that would impede the
          diligent and complete fulfillment of its obligations hereunder.

     (e)  Title. Each of BioChem and Oncogene for itself represents it has good
          and marketable title to or valid leases or licenses for, all of its
          properties, rights and assets, excluding patent property, to be used
          in the fulfillment of this responsibilities under the Research
          Program, subject to no claim of any third party other than the
          relevant lessors or licensors.


                                      -26-


   28


                                   ARTICLE 11
                                    COVENANTS

11.1 Affirmative Covenants Other than Reporting Requirements. Throughout the
     term of this Agreement, each of BioChem and Oncogene shall:

     (a)  comply in all material respects with the requirements of all
          applicable laws, rules, regulations and orders of any government
          authority to the extent necessary to conduct the Research Program;

     (b)  maintain and preserve all of its properties, rights and assets to be
          used in the proper conduct of the Research Program in good working
          order and condition in accordance with the general practice of other
          companies of similar size and character;

     (c)  conduct all experiments related to the Research Program and maintain
          all facilities used in connection therewith in accordance with Medical
          Research Council Guidelines, where applicable, and with all applicable
          federal, provincial, and local environmental requirements;

     (d)  pay to the other Party, if any, any Deficiency Amount determined by
          the JSC.


                                   ARTICLE 12
                               DISPUTE RESOLUTION

In the event BioChem and Oncogene cannot agree on any matter requiring agreement
between the Parties, the matter of differences shall be determined by
arbitration. Arbitration shall be conducted under the Commercial Arbitration
Rules of the American Arbitration Association by one (1) person appointed by the
Parties or, if the Parties cannot agree within thirty (30) days following
notification by one Party that it wishes to refer a matter to arbitration, by
such person empowered by the American Arbitration Association to so appoint an
arbitrator. Arbitration shall take place in a location agreed to by the Parties,
or absent such agreement, chosen by the arbitrator. The decision of the
arbitrator shall be final and binding on both Parties. The fees and expenses of
the arbitrator shall be borne equally by the Parties.


                                   ARTICLE 13
                                     NOTICES

Any notice, statement, payment or other document required to be given hereunder
shall be in writing and shall be given either personally, by mailing the same,
postage prepaid, by certified or registered mail (return receipt requested), in
the absence of an actual or apprehended disruption of mail service or delivered
by telecopier addressed as follows, or to


                                      -27-


   29


such other addresses as may be designated from time to time by notice given, in
the manner provided in this Article 13.

If to BioChem:             BioChem Pharma (International) Inc.
                           c/o BioChem Therapeutic Inc.
                           Armand-Frappier Blvd.
                           Laval, Quebec
                           H7V 4A7

                           Attention:  President
                           ---------------------
                           Telecopier: (514) 978-7767

If to Oncogene:            Oncogene Science, Inc.
                           106 Charles Lindbergh Blvd.
                           Uniondale, New York 11553-3649

                           Attention:  Chief Executive Officer
                           -----------------------------------
                           Telecopier: (516) 745-6429

Notices given personally shall be deemed given as of the date delivered. Notices
given by telecopier shall be deemed given on the first business day following
the date of transmission. Mailed notices shall be deemed given on the fifth
business day following the date of such mailing.


                                   ARTICLE 14
                                  MISCELLANEOUS

14.1 Binding Effect. This Agreement shall be binding upon and enure to the
     benefit of the Parties hereto and their respective legal representatives,
     successors and permitted assigns.

14.2 Headings. The headings contained in this Agreement are for convenience of
     reference only and do not form a part of this Agreement, and no
     construction or inference shall be derived therefrom.

14.3 Entire Agreement. This Agreement and the documents and other agreements
     referred to herein or signed concurrently herewith set forth the entire
     agreement and understanding of the Parties.

14.4 Severability. In the event that any provision of this Agreement is held by
     a court of competent jurisdiction to be unenforceable because it is invalid
     or in conflict with any law of any relevant jurisdiction, the validity of
     the remaining provisions shall be


                                      -28-


   30


     construed and enforced as if the Agreement did not contain the particular
     provisions held to be unenforceable.

14.5 Counterparts. This Agreement may be executed simultaneously in two or more
     counterparts, each of which shall be deemed an original, but all of which
     together shall constitute one and the same instrument.

14.6 Amendment, Waiver, etc. This Agreement may be amended, modified, superseded
     or cancelled, and any of the terms hereof may be waived, only by a written
     instrument executed by each Party hereto or, in the case of waiver, by the
     Party or Parties waiving compliance. The delay or failure of any Party at
     any time or times to require performance of any provision hereof shall in
     no manner affect the rights at a later time to enforce the same. No waiver
     by any Party of any condition or of the breach of any term contained in
     this Agreement, whether by conduct or otherwise, in any one or more
     instance, shall be deemed to be, or construed as, a further or continuing
     waiver of any such condition or of the breach of such term or any other
     term of this Agreement.

14.7 Force Majeure. In the event that either Party is prevented from or is
     unable to perform any of its obligations under this Agreement due to any
     act of God, fire, casualty, flood, war, strike, lockout, failure of public
     utilities, injunction of any act, exercise, assertion or requirement of
     governmental authority, including any governmental law, order, or
     regulation permanently or temporarily prohibiting or reducing the level of
     research and development work hereunder, epidemic, destruction or
     production facilities, riots, insurrection, inability to procure or use
     materials, labour, equipment, transportation or energy sufficient to meet
     experimentation needs, or any other cause beyond the reasonable control of
     the Party invoking this Article 14 if such Party shall have used its best
     efforts to avoid such occurrence, such Party shall give notice to the other
     Party in writing promptly, and thereupon the affected Party's performance
     shall be excused and the time for performance shall be extended for the
     period of delay or inability to perform due to such occurrence.

14.8 Independent Contractor. Nothing in this Agreement shall be construed as
     constituting both Parties as partners or joint venturers with respect to
     this Agreement. Both Parties are independent contractors under this
     Agreement.

14.9 Assignment and Successors. This Agreement and the rights and interests
     hereunder may not be assigned by either Party in whole or in part except to
     an Affiliate, a purchaser of all or substantially all of the assets of a
     Party or to any successor corporation resulting from any merger or
     consolidation of either Party with or into such corporation.

14.10 Governing Law. This Agreement shall be construed and interpreted in
     accordance with the laws of the State of New York.


                                      -29-


   31


14.11 Language. The Parties hereto have expressly requested that this Agreement
      and a related documents and notices be drafted in the English language.
      Les parties aux presentes ont exige, de facon expresse, que la presente
      convention de meme que tous les documents et avis qui s'y rattachent 
      soient rediges en langue francaise.


IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
as a sealed instrument in their names by their properly and duly authorized
representatives as of the date first written above.


                                       BIOCHEM PHARMA (INTERNATIONAL) INC.



                                       By:   /s/ Francois Legault
                                             -----------------------------------
                                             Francois Legault


                                       By:   /s/ Michael Grey
                                             -----------------------------------
                                             Michael Grey



                                       ONCOGENE SCIENCE, INC.


                                       By:   /s/ Gary E. Frashier
                                             -----------------------------------
                                             Gary E. Frashier


                                      -30-