EXHIBIT 3.21

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.
CONFIDENTIAL PORTIONS HAVE BEEN OBSCURED.


                              VIVENTIA BIOTECH INC.
                             SUBSCRIPTION AGREEMENT

TO:     VIVENTIA BIOTECH INC.

RE:     SUBSCRIPTION FOR AND PURCHASE OF UNITS

1.   SUBSCRIPTION

Teva Pharma B.V. (the "PURCHASER") hereby subscribes for and agrees to purchase,
on and subject to the terms and conditions set forth herein, from Viventia
Biotech Inc. (the "CORPORATION") such number of units ("UNITS") as is specified
in section 18 hereof (collectively, the "PURCHASED UNITS") at a price of $0.20
per Unit.

2.   DESCRIPTION OF UNITS

Each Unit is comprised of one common share of the Corporation (a "COMMON SHARE")
and one common share purchase warrant (a "SHARE PURCHASE WARRANT"). Each Share
Purchase Warrant is exerciseable by the holder at any time into one Common Share
at a price of $0.20 per Common Share. Each Share Purchase Warrant expires at
5:00 p.m. on the date which is five years from the date of issuance of the Share
Purchase Warrants.

The Units, Common Shares, Share Purchase Warrants and Common Shares issued upon
the exercise of the Share Purchase Warrants (collectively, the "PURCHASED
SECURITIES") will be subject to resale restrictions prescribed by the Toronto
Stock Exchange (the "TSX") and any regulatory body having jurisdiction, and may
not be sold or transferred for a period of 120 days following the Closing Date,
other than in accordance with the rules of the TSX and any regulatory body
having jurisdiction. The Purchaser is advised to consult legal advisers
regarding such restrictions.

3.   PAYMENT

The total amount payable by the Purchaser in respect of the Purchased Units (the
"SUBSCRIPTION PRICE") will be paid in lawful money of Canada on the Closing (as
herein defined) by certified cheque or bank draft drawn on a Canadian chartered
bank and payable to "VIVENTIA BIOTECH INC.", or as otherwise directed by the
Corporation.

4.   CONDITIONS OF CLOSING

The Purchaser must complete, sign and return one executed copy of this
Subscription Agreement at the Closing. It is a condition of the Closing that all
regulatory approvals necessary for the purchase and sale of the Purchased Units
must be obtained prior to the Closing Date (as herein defined). The obligations
of the Purchaser to complete the purchase of the Purchased Units contemplated
hereby will be conditional upon the fulfillment at or before the Closing Time
(as herein defined) of the following conditions:




                                      -2-

     (a)  the Corporation having obtained all requisite regulatory approvals
          required to be obtained by the Corporation in respect of the offering
          of the Purchased Units (the "OFFERING");

     (b)  the Corporation having complied fully with all relevant statutory and
          regulatory requirements required to be complied with prior to the
          Closing Time (including without limitation those of the TSX in
          connection with the Offering);

     (c)  the Corporation having received a letter of the TSX accepting notice
          of the Offering subject to the usual conditions;

     (d)  the Corporation having taken all necessary corporate action to
          authorize and approve the Subscription Agreement and the issuance of
          the Purchased Securities and all other matters relating thereto;

     (e)  delivery of a bring down certificate with respect to the accuracy of
          the representations and warranties as at the Closing Time and
          compliance and fulfillment with all covenants to be performed as at
          the Closing Time;

     (f)  the Purchaser having received a favorable legal opinion of the
          Corporation's counsel addressed to the Purchaser, acceptable to
          counsel to the Purchaser, acting reasonably; in giving such opinion,
          counsel to the Corporation will be entitled to rely, where
          appropriate, as to matters of fact, upon the representations and
          warranties of the Purchaser contained herein, a certificate of fact of
          the Corporation signed by officers in a position to have knowledge of
          such facts and their accuracy and certificates of such public
          officials and other persons as are necessary or desirable;

     (g)  the Corporation having delivered to the Purchaser a certificate of
          Computershare Trust Company of Canada as registrar and transfer agent
          of the Corporation which certifies the number of outstanding common
          shares of the Corporation as at the day before the Closing Date;

     (h)  the Common Shares and Share Purchase Warrants in form acceptable to
          the Purchaser, acting reasonably, will have been executed and
          delivered by the Corporation, to the extent necessary, to the
          Purchaser; and

     (i)  the Dan family and shareholders of the Corporation controlled or owned
          by them having entered into a shareholders' agreement with respect to
          their securities of the Corporation with the Purchaser, in a form
          acceptable to the Purchaser.


The Corporation covenants that it will use its reasonable commercial efforts to
fulfill or cause to be fulfilled, at or before the Closing Time, each of the
conditions listed above in items (a) to (h).




                                      - 3 -

5.   USE OF PROCEEDS

The Corporation agrees that the proceeds from the issuance, sale and delivery of
the Purchased Units will only be used to finance discovery, research and product
development initiatives and general operating activities in accordance with the
strategic operating plan approved by the Board of Directors of the Corporation
or any amendments thereto approved by the Board of Directors of the Corporation.
For greater certainty, the proceeds from the issuance, sale and delivery of the
Purchased Units will not be used to redeem or purchase any securities (including
convertible securities) or debt of the Corporation.

6.   CLOSING

Delivery and payment for the Purchased Units will be completed (the "CLOSING")
at the offices of Torys LLP, 32nd Floor, Maritime Life Tower, TD Centre, 79
Wellington Street West, Toronto, Ontario, M5K 1N2, at 8:00 a.m. (Toronto time)
(the "CLOSING TIME") on September 5, 2003 or on such earlier or later date or
time as the Corporation and the Purchaser may agree (the "CLOSING DATE"). This
executed Subscription Agreement is open for acceptance by the Corporation at any
time within five business days of the date it is executed by the Purchaser.
Confirmation of acceptance or rejection of this subscription will be delivered
to the Purchaser within five business days of the date it is executed by the
Purchaser.

One or more certificates representing the Common Shares and Share Purchase
Warrants comprising each Unit will be available at the Closing in accordance
with the terms of Section 4(h) hereof for delivery against payment to the
Corporation of the Subscription Price in the manner specified above.

7.   PROSPECTUS EXEMPTIONS

     (a)  The Purchaser represents and warrants that it is resident outside of
          Ontario and Canada. The Purchaser acknowledges, agrees and covenants
          that:

          (i)  at the Closing Date and thereafter, the Purchased Securities may
               be subject to transfer and resale restrictions under applicable
               laws, including the rules and regulations of the TSX;

          (ii) since the issuance of the Purchased Securities to it hereunder is
               an issuance of securities outside of Canada, in the spirit of the
               Interpretation Note which has been published in the place and
               stead of repealed O.S.C. Policy 1.5 and in the spirit of the
               proposed Rule to replace the same, it will not sell any of the
               Purchased Securities issued hereunder to any person resident in
               Canada for a period of one hundred and twenty (120) days from the
               date the said Purchased Securities are issued, unless the same is
               permitted under an applicable exemption from applicable
               securities legislation. If, during the period of any resale
               restriction applicable to the Purchaser, new legislation is
               enacted in respect of the sale of



                                      - 4 -

               securities outside of Ontario or the other provinces of Canada,
               such as proposed Multilateral Instrument 72-101, each of the
               Corporation and the Purchaser covenants to comply with the
               provisions of same to the extent applicable, and if required by
               such new legislation the certificates representing the Purchased
               Securities will be appropriately legended in respect of
               applicable resale restrictions; and


         (iii) the Purchaser will not sell any of the Purchased Securities to
               any resident of Canada or for the account of or benefit of any
               resident of Canada except in compliance with the securities laws
               of the applicable province or territory of Canada.

     (b)  The Purchaser further acknowledges and agrees that it will execute any
          documents required by the TSX or any regulatory authority having
          jurisdiction regarding restrictions on transfer and any applicable
          hold period. The Purchaser acknowledges and agrees that:

          (i)  it has not been provided with a prospectus in connection with its
               subscription for the Purchased Units;

          (ii) it has not been provided with an offering memorandum within the
               meaning of the Securities Act (Ontario) and the Regulation and
               rules thereunder in connection with this purchase of the
               Purchased Units; and

          (iii)it has been advised to consult its own legal advisors with
               respect to applicable resale restrictions and that it is solely
               responsible (and the Corporation is not in any way responsible)
               for compliance with applicable resale restrictions.

     (c)  The Purchaser agrees that the Corporation may be required by law or
          otherwise to disclose the identity of the Purchaser.

8.   REPRESENTATIONS, WARRANTIES AND COVENANTS

     (a)  BY THE CORPORATION: The Corporation hereby represents, warrants and
          covenants to and with the Purchaser and acknowledges that the
          Purchaser is relying upon such representations, warranties and
          covenants (which representations, warranties and covenants will
          survive the Closing) that:

          (i)  each of the Corporation and 20025 Yukon Inc. (the "SUBSIDIARY")
               is duly organized and validly existing under the laws of Ontario
               and Yukon, respectively; each is duly registered, licensed or
               qualified as an extra-provincial corporation in each jurisdiction
               where it carries on business except where the failure to be so
               registered, licensed or qualified will not result in an adverse



                                      - 5 -

               material effect; other than the Subsidiary, a wholly-owned
               subsidiary of the Corporation, the Corporation has no
               subsidiaries;


          (ii) the Corporation has the corporate power, capacity and authority
               to enter into, and to perform its obligations under, this
               Subscription Agreement; this Subscription Agreement has been duly
               authorized, executed and delivered by the Corporation and is a
               valid and binding obligation of it, enforceable in accordance
               with its terms, subject to the usual exceptions as to bankruptcy
               and the availability of equitable remedies; all necessary
               corporate action has been taken by the Corporation to validly
               issue and sell the Purchased Units to the Purchaser; at the
               Closing, all agreements contemplated by this Subscription
               Agreement to which the Corporation is a party will be duly
               authorized, executed and delivered by the Corporation and will be
               valid and binding obligations of it, enforceable in accordance
               with their respective terms, subject to the usual exceptions as
               to bankruptcy and the availability of equitable remedies;

         (iii) each of the Corporation and the Subsidiary has the corporate
               power and capacity to own or lease its assets and to carry on its
               business as now conducted by it and as is presently intended to
               be conducted by it;

          (iv) other than acceptance by the TSX of the private placement notice
               relating to the issue and sale of the Purchased Units and the
               approval of the holders of the Corporation's debentures, no
               consents, approvals, authorizations, declarations, registrations,
               filings, notices or other actions whatsoever are required in
               connection with the execution, delivery and performance by the
               Corporation of the transactions contemplated by this Agreement;

          (v)  the entering into of this Subscription Agreement, the sale of the
               Purchased Units and the performance by the Corporation of its
               other obligations contemplated hereby will not result in a breach
               of, and do not create a state of facts which, after notice or
               lapse of time or both, will result in a breach of, and do not and
               will not conflict with,

               (A)  any of the terms, conditions or provisions of the constating
                    documents or by-laws or resolutions of the shareholders and
                    directors of the Corporation or the Subsidiary;


               (B)  any material contract of the Corporation;




                                      - 6 -

               (C)  to the knowledge of the Corporation, any statute, rule or
                    regulation applicable to the Corporation or the Subsidiary;
                    and

               (D)  to the knowledge of the Corporation, any judgment decree or
                    order binding the Corporation, the Subsidiary or the
                    property or assets of the Corporation or the Subsidiary;


          (vi) the Common Shares to be delivered to the Purchaser, when
               delivered to the Purchaser, will be duly authorized, validly
               issued and outstanding as fully-paid and non-assessable shares in
               the capital of the Corporation;

         (vii) the Corporation will, at all times while the Share Purchase
               Warrants are outstanding, allot and maintain sufficient number of
               Common Shares to satisfy the exercise of Share Purchase Warrants
               comprising the Purchased Units;

        (viii) the Common Shares issuable upon the exercise of the Share
               Purchase Warrants will, upon due exercise of the Share Purchase
               Warrants and the receipt by the Corporation of the exercise price
               in accordance with the terms thereof, be duly authorized, validly
               issued and outstanding as fully-paid and non-assessable shares in
               the capital of the Corporation;

          (ix) each of the Corporation and the Subsidiary is current and
               up-to-date with (i) all material filings required to be made by
               it under the corporate laws of its jurisdiction of incorporation
               and (ii) to the best of the Corporation's knowledge, all filings
               required to be made under the securities laws of the provinces of
               Canada where it is a reporting issuer or its equivalent, as
               applicable;

          (x)  the Corporation is a reporting issuer not in default of its
               obligations under the securities laws of British Columbia,
               Alberta and Ontario (the "PROVINCES") and no material change
               relating to the Corporation has occurred with respect to which
               the requisite material change report has not been filed under the
               securities laws of the Provinces and no such disclosure has been
               made on a confidential basis;

          (xi) none of the materials filed by or on behalf of the Corporation
               with the applicable securities commissions or the stock exchanges
               (the "PUBLIC RECORD") contained a misrepresentation (as defined
               in the Securities Act (Ontario)) as at the date of such filing
               which has not been corrected;

         (xii) the Corporation is a "QUALIFYING ISSUER" as such term is defined
               in Multilateral Instrument 45-102;




                                      - 7 -

        (xiii) the authorized capital of the Corporation consists of an
               unlimited number of common shares and an unlimited number of
               preference shares, issuable in series, of which, as at June 30,
               2003, 277,843,627 Common Shares (and no other shares) are issued
               and outstanding as fully paid and non-assessable; the authorized
               capital of the Subsidiary consists of an unlimited number of
               class A shares of which, as at the date hereof, one class A share
               (and no other shares)is issued and outstanding as fully paid and
               non-assessable, and such share is owned by the Corporation; all
               such issued and outstanding securities have been validly issued
               and are outstanding as fully paid and non-assessable; other than
               as disclosed herein or in connection with the debentures of the
               Corporation issued on June 30, 2002, to the knowledge of the
               Corporation, there are no shareholders agreements, pooling
               agreements, voting trusts or other agreements or understandings
               with respect to the voting, acquisition, disposition or other
               dealing or holding of any securities, or any of them, of the
               Corporation or of the Subsidiary; other than, as at July 25,
               2003, 107,771,556 share purchase warrants and 5,284,496 options
               to purchase Common Shares granted to directors, officers,
               employees and shareholders of the Corporation, and 15,384,614
               shares and 15,384,614 share purchase warrants issuable upon the
               conversion of the outstanding convertible debentures, there are
               no agreements, options, warrants, rights of conversion or other
               rights pursuant to which either the Corporation or the Subsidiary
               is, or may become, obligated to issue any shares or any
               securities convertible or exchangeable, directly or indirectly,
               into any shares of the Corporation or the Subsidiary,
               respectively;

         (xiv) each of the Corporation and the Subsidiary has conducted and is
               conducting its business in compliance in all material respects
               with all applicable licensing, antipollution and environmental
               protection legislation, regulations or by-laws or other similar
               legislation, laws, by-laws, rules and regulations of any
               governmental or regulatory bodies; to the knowledge of the
               Corporation, there is no licensing, anti-pollution or
               environmental legislation, regulation, by-law or lawful
               requirement presently in force which the Corporation anticipates
               that it or the Subsidiary will be unable to comply with without
               adversely affecting its financial condition, results of
               operations, business or prospects in any jurisdiction in which
               its business is carried on;

          (xv) each of the Corporation and the Subsidiary holds all material
               licences, certificates, registrations, permits, consents or
               qualifications required by the appropriate state, provincial,
               municipal or federal regulatory agencies or bodies necessary in
               order to enable its business to be carried on as now conducted
               and


                                      - 8 -

               all such licences, certificates, registrations, permits, consents
               and qualifications are valid and subsisting and in good standing
               and do not contain any unusual burdensome provision, condition or
               limitation which has or could reasonably be expected to have a
               material adverse effect on the operation of the business of the
               Corporation or the Subsidiary as now conducted or as presently
               intended to be conducted and, neither the Corporation nor the
               Subsidiary has received any notice of proceedings relating to the
               revocation or modification of any such licences, certificates,
               registrations, permits, consents, or qualifications which, if the
               subject of an unfavorable decision, ruling or finding would
               materially and adversely affect the conduct of the business,
               operations, financial condition or income or future prospects of
               the Corporation or the Subsidiary;

         (xvi) except for proceedings set forth in Schedule 8(a)(xvi), there
               are no actions, suits or proceedings (whether or not purportedly
               on behalf of the Corporation or the Subsidiary) pending or, to
               the knowledge of the Corporation, threatened or expected against
               or affecting, the Corporation or the Subsidiary, at law or in
               equity, before or by any federal, provincial, state, municipal or
               other governmental department, court, commission, board, bureau,
               agency or instrumentality, domestic or foreign, or by or before
               an arbitrator or arbitration board. To the knowledge of the
               Corporation no ground exists upon which any such action, suit or
               proceeding might be commenced with any reasonable likelihood of
               success. To the knowledge of the Corporation, there are no
               judgments, decrees, orders or awards of any court, governmental
               body or arbitration affecting the Corporation or the Subsidiary,
               at law or in equity;

        (xvii) the audited financial statements of the Corporation as at and for
               the years ended December 31, 2001 and 2002 contained in the
               Corporation's annual reports for the years ended December 31,
               2001 and 2002:

               (A)  have been prepared in accordance with Canadian generally
                    accepted accounting principles applied on a basis consistent
                    with those of preceding fiscal periods;

               (B)  represent fully, fairly and correctly in all material
                    respects the assets, liabilities and financial condition of
                    the Corporation as at December 31, 2001 and 2002 and the
                    results of its operations and the changes in its financial
                    position for the year then ended;



                                      - 9 -

               (C)  are in material accordance with the books and records of the
                    Corporation; and

               (D)  contain and reflect all necessary adjustments for the fair
                    presentation of the results of operations and the financial
                    condition of the business of the Corporation for the period
                    covered thereby, and there has not been any material adverse
                    change in the financial position of the Corporation, or its
                    businesses, assets, liabilities or undertaking since
                    December 31, 2001 and 2002 other than as specified in the
                    Public Record;

       (xviii) the unaudited interim financial statements of the Corporation
               as at and for the six months ended June 30, 2003:

               (A)  have been prepared in accordance with Canadian generally
                    accepted accounting principles applied on a basis consistent
                    with those of preceding periods;

               (B)  represent fully, fairly and correctly in all material
                    respects the assets, liabilities and financial condition of
                    the Corporation as at June 30, 2003, and the results of its
                    operations and the changes in its financial position for the
                    period then ended;

               (C)  are in material accordance with the books and records of the
                    Corporation; and

               (D)  contain and reflect all necessary adjustments for the fair
                    presentation of the results of operations and the financial
                    condition of the business of the Corporation for the period
                    covered thereby, and there has not been any material adverse
                    change in the financial position of the Corporation or its
                    business, assets, liabilities or undertakings since June 30,
                    2003 other than as specified in the Public Record;

         (xix) the Subsidiary does not carry on any active business, its
               liabilities, contingent or otherwise, do not exceed $100 and
               generally accepted accounting principles in Canada do not require
               the assets and liabilities and results of operations of the
               Subsidiary to be consolidated with those of the Corporation;

          (xx) the auditors of the Corporation who audited the financial
               statements for the years ended December 31, 2001 and 2002 and who
               provided their audit report thereon are independent public
               accountants as required under applicable Canadian securities
               laws;



                                     - 10 -

         (xxi) each of the Corporation and the Subsidiary has filed all
               necessary tax returns and has paid all applicable taxes of
               whatever nature for all tax years to the date hereof to the
               extent such taxes have become due or have been alleged to be due
               and there are no tax deficiencies or interest or penalties
               accrued or accruing, or alleged to be accrued or accruing,
               thereon with respect to the Corporation or the Subsidiary which,
               in any of the above cases, might reasonably be expected to result
               in an adverse change in the condition, financial or otherwise, or
               in the earnings, business, affairs or business prospects of the
               Corporation or the Subsidiary, other than existing tax
               deficiencies which in the aggregate do not exceed $50,000;

        (xxii) to the knowledge of the Corporation, no order ceasing or
               suspending trading in securities of the Corporation or
               prohibiting the sale of securities by the Corporation has been
               issued and, no proceedings for this purpose have been instituted
               or are pending;

       (xxiii) to the knowledge of the Corporation, each of the Corporation
               and the Subsidiary is in compliance with all laws respecting
               employment and employment practices, terms and conditions of
               employment, pay equity and wages, except where such
               non-compliance would not constitute an adverse material fact of
               the Corporation or the Subsidiary or result in an adverse
               material change to the Corporation or the Subsidiary, and has not
               and is not engaged in any unfair labour practice;

        (xxiv) the Common Shares to be issued at Closing and the Common Shares
               to be issued upon exercise of the Share Purchase Warrants have
               been conditionally approved for listing and upon issuance will be
               listed and posted for trading on the TSX;

         (xxv) all of the Corporation's issued and outstanding Common Shares
               and the Common Shares reserved or allotted for issue have been
               listed for trading on the TSX;

        (xxvi) the TSX has accepted notice of the private placement
               contemplated by this Subscription Agreement;


       (xxvii) the assets of the Corporation are insured against loss or
               damage to an extent and in amounts which are reasonable for the
               business of the Corporation; to the knowledge of the Corporation,
               the Corporation is not in default with respect to any of the
               provisions contained in the insurance policies, the payment of
               any premiums under any insurance policy nor has failed to give
               any notice or to present any claim under any insurance policy in
               a due and timely fashion; copies of all insurance policies of the
               Corporation and the



                                     - 11 -

               Subsidiary and the most recent inspection reports received from
               insurance underwriters have been made available to the Purchaser;

      (xxviii) to the knowledge of the Corporation, the Corporation has
               performed all of the obligations required to be performed by it
               and is entitled to all benefits under, and is not alleged to be
               in material default of any material contract to which it is a
               party; each of the material contracts is in full force and
               effect, unamended, and there exists no material default or event
               of default or event, occurrence, condition or act which, with the
               giving of notice, the lapse of time or the happening of any other
               event or condition, would become a material default or event of
               default under any material contract;

        (xxix) since March 31, 2003, the Corporation has carried on business
               in the ordinary course;

         (xxx) the Corporation is not in default under any credit agreement,
               guarantee, bond, debenture, note or other instrument evidencing
               or securing any debt and there exists no state of facts which
               after notice or lapse of time or both or otherwise would
               constitute such a default;

        (xxxi) to the knowledge of the Corporation, the Corporation and the
               Subsidiary have all the rights in the Company Intellectual
               Property and Intellectual Property Licenses that they reasonably
               require to carry on their business as currently conducted, and
               neither the Corporation nor the Subsidiary has granted any person
               any license, right to use or other interest in the Company
               Intellectual Property or Intellectual Property Licenses that
               would impair the ability of the Corporation to conduct its
               business as it is currently being conducted. The Company
               Intellectual Property and the Intellectual Property subject to
               the Intellectual Property Licenses together constitute all of the
               Intellectual Property currently used in connection with the
               operation of the business of the Corporation and the Subsidiary.
               Schedule 8(a)(xxxi) contains accurate particulars of all
               registrations or applications for registration of the Company
               Intellectual Property. All material contracts made by the
               Corporation or the Subsidiary granting any person any licenses,
               rights of use or other interest in or to the Company Intellectual
               Property are in full force and effect, do not constitute a
               breach, modification, cancellation, termination or suspension of
               any rights in respect of the Company Intellectual Property, and
               did not require the consent of any person. The Company
               Intellectual Property has not been used or enforced, or failed to
               be used or enforced, in any manner that would result in a
               non-renewal, modification, abandonment, cancellation or
               unenforceability of any




                                     - 12 -

               of the Company Intellectual Property. The Corporation and the
               Subsidiary have renewed or made application to renew all
               registrations of Company Intellectual Property and has paid all
               applicable fees, all within the applicable renewal periods. To
               the knowledge of the Corporation, all of the Intellectual
               Property Licenses and, all of the Intellectual Property rights
               which have been granted to the Corporation or the Subsidiary in
               the Intellectual Property Licenses, are in full force and effect
               and have not been used or enforced, or failed to be used or
               enforced, in any manner that would result in a non-renewal,
               modification, abandonment, cancellation or unenforceability of
               any of such Intellectual Property or the Intellectual Property
               Licenses and, if applicable, they have been renewed. Neither the
               Corporation nor the Subsidiary is in breach of or in default
               under any of the Intellectual Property Licenses. To the knowledge
               of the Corporation, neither the Company Intellectual Property nor
               its use in the business of the Corporation as currently carried
               on or any of the Intellectual Property Licenses on the terms set
               forth therein, infringes upon or breaches any rights in the
               Intellectual Property of any other person, except any third party
               Intellectual Property for which licenses are generally available
               on commercial terms. Other than as set out in Schedule 8(a)(xvi),
               neither the Corporation nor the Subsidiary has received any
               notice of any adverse claim, litigation or assertion of
               infringement in respect of the Company Intellectual Property or
               the Intellectual Property Licenses, and the Corporation is not a
               party to any litigation alleging that the conduct of the
               business, as currently carried on infringes upon or breaches the
               rights of any other person in Intellectual Property;

       (xxxii) the Corporation has provided to the Purchaser all material
               information relating to the financial condition, business and
               prospects of the Corporation and the Subsidiary and all such
               information is true, accurate and complete in all material
               respects and omits no material fact necessary to make such
               information not misleading; and

      (xxxiii) the Corporation has not offered the Purchased Units to any
               other person resident in or subject to the laws of the
               Netherlands.

     (b)  BY THE PURCHASER: The Purchaser hereby represents, warrants and
          covenants to and with the Corporation and acknowledges that the
          Corporation is relying upon such representations, warranties and
          covenants (which representations, warranties and covenants will
          survive the Closing) that:

          (i)  the Purchaser is acquiring the Purchased Units (which, for the
               purpose of this section, includes any shares issuable upon



                                     - 13 -

               conversion of the Purchased Units) as principal for its own
               account and not for the benefit of any other person;

          (ii) if the Purchaser sells the Purchased Securities, it will comply
               with the securities legislation of the jurisdiction within which
               the Purchaser and the person to whom the Purchaser sells such
               securities resides;

         (iii) the sale of the Purchased Securities by the Corporation to the
               Purchaser is exempt from the prospectus requirements of the
               securities laws of the Netherlands and no prospectus is required
               nor are other documents required to be filed, proceedings taken
               or approvals, permits, consents or authorizations of the
               regulatory authorities obtained under the laws of the Netherlands
               to permit such sale. There are no ongoing reporting requirements
               in connection with the sale of such securities under securities
               laws of the Netherlands;

          (iv) as the Purchased Securities are subject to resale restrictions
               under the rules of the TSX and may be subject to resale
               restrictions under any other regulatory authority having
               jurisdiction, the Purchaser will comply with all relevant laws,
               rules and policies concerning any resale of such securities and
               will consult with its own legal advisors with respect to such
               compliance;

           (v) the Purchaser will execute and deliver within the applicable time
               periods all documentation as may be required by applicable
               Canadian securities legislation and regulations to permit the
               purchase of the Purchased Units on the terms herein set forth;

          (vi) if required by applicable securities legislation, policy or order
               of a securities regulatory authority, stock exchange or other
               regulatory authority, the Purchaser (at the Corporation's
               expense) will execute, deliver, file and otherwise assist the
               Corporation in filing such reports, undertakings and other
               documents with respect to the issue of the Purchased Securities,
               as may be required;

         (vii) no finder, broker, agent, or other intermediary has acted for or
               on behalf of the Purchaser in connection with the negotiation or
               consummation of the transactions contemplated hereby, and no fee
               will be payable by the Purchaser or the Corporation to any such
               person in connection with such transactions;

        (viii) the Purchaser is not a "UNITED STATES PERSON" (as that term is
               defined in Rule 902 of Regulation S promulgated under the United
               States Securities Act of 1933) nor purchasing the Purchased



                                     - 14 -

               Securities for the account of a United States person or for
               resale to a United States person or to a person in the United
               States;

          (ix) the Purchaser is not resident in the Province of Ontario;

           (x) the Purchaser has such knowledge and experience in financial and
               business affairs as to be capable of evaluating the merits and
               risks of this investment;

          (xi) the Purchaser is duly incorporated, validly existing and in good
               standing under the laws of and resident in, the Netherlands;

         (xii) the Purchaser has the corporate power, capacity and authority to
               enter into, and to perform its obligations under, this
               Subscription Agreement. This Subscription Agreement has been duly
               authorized, executed and delivered by the Purchaser and is a
               valid and binding obligation of it, enforceable in accordance
               with its terms, subject to the usual exceptions as to bankruptcy
               and the availability of equitable remedies. At the Closing, all
               agreements contemplated by this Subscription Agreement to which
               the Purchaser is a party will be duly authorized, executed and
               delivered by the Purchaser and will be valid and binding
               obligations of it, enforceable in accordance with their
               respective terms, subject to the usual exceptions as to
               bankruptcy and the availability of equitable remedies;

        (xiii) the entering into of this Subscription Agreement, the purchase
               of the Purchased Units, Common Shares and Share Purchase
               Warrants, and the performance by the Purchaser of its other
               obligations contemplated hereby will not result in a breach of,
               and do not create a state of facts which, after notice or lapse
               of time or both, will result in a breach of, and do not and will
               not conflict with, (a) any of the terms, conditions or provisions
               of the constating documents or by-laws or resolutions of the
               shareholders and directors of the Purchaser; (b) to the knowledge
               of the Purchaser, any statute, rule or regulation applicable to
               the Purchaser; and (c) to the knowledge of the Purchaser, any
               judgment decree or order binding the Purchaser or the property or
               assets of the Purchaser.

         (xiv) to the knowledge of the Purchaser, the Purchaser is not required
               to obtain any consent, authorization or order of, or make any
               filing or registration with, any court or governmental agency in
               order for it to execute, deliver or perform any of its
               obligations under this Subscription Agreement or to purchase the
               Units in accordance with the terms hereof; and



                                     - 15 -

          (xv) the Purchaser and its advisors, if any, have been afforded the
               opportunity to ask questions of the Corporation. The Purchaser
               has sought such accounting, legal and tax advice as it has
               considered necessary to make an informed investment decision with
               respect to its acquisition of the Units. Purchaser understands
               that it (and not the Corporation) will be responsible for its own
               tax liabilities that may arise as a result of this investment or
               the transactions contemplated by this Subscription Agreement.

     (c)  KNOWLEDGE: For greater certainty, references to the knowledge of the
          Corporation or to the best of the Corporation's knowledge in paragraph
          (a) above, refer to the knowledge of each of Leslie Dan, Anthony
          Schincariol, Michael Byrne and Nicholas Glover after having made
          reasonable enquiries.


9.   RELIANCE UPON REPRESENTATIONS, WARRANTIES AND COVENANTS

The Purchaser acknowledges that the representations, warranties and covenants of
the Purchaser contained in this Subscription Agreement are made with the intent
that they may be relied upon by the Corporation to, among other things,
determine its eligibility to purchase Purchased Units. The Purchaser further
agrees that by accepting the Purchased Units, the Purchaser will be representing
and warranting that the foregoing representations and warranties are true as at
the Closing Time with the same force and effect as if they had been made by the
Purchaser at the Closing Time and that they will survive the purchase by the
Purchaser of the Purchased Units and will continue in full force and effect
notwithstanding any subsequent disposition by them of the Purchased Units,
Common Shares, Share Purchase Warrants or Common Shares issued upon the exercise
of the Share Purchase Warrants.

10.  PRE-EMPTIVE RIGHT

     (a)  Except as expressly provided in this Section 10, no Equity Securities
          will be issued by the Corporation, and no option or other right for
          the purchase of, acquisition of, or subscription for, any Equity
          Securities will be granted, at any time after the date hereof except
          upon compliance with the provisions of this Section 10. Without
          limiting the generality of the foregoing, nothing in this section 10
          will be construed to prohibit the Corporation from issuing securities
          at any time and from time to time, on such terms and conditions as may
          be acceptable to the board of directors of the Corporation.

     (b)  If the Corporation proposes to undertake a Public Share Issuance, the
          Corporation will ensure that the terms of such Public Share Issuance
          will enable the Purchaser to purchase that number of Equity Securities
          in order that the Purchaser may maintain its percentage holding of the
          total issued and outstanding Common Shares of the Corporation on a
          fully diluted basis, excluding Excluded Share Issuances, determined
          immediately prior




                                     - 16 -

          to the Public Share Issuance (the "OWNERSHIP LEVEL") on the same terms
          and conditions as the other participants in the Public Share Issuance.

     (c)  If the Corporation proposes to undertake a Public Share Issuance and
          the circumstances of the Public Share Issuance in the Corporation's
          judgment, acting reasonably, do not permit the Purchaser to
          participate in the offering, then the Corporation may proceed with the
          offering provided that the Purchaser is afforded an opportunity within
          180 days of the closing of such offering to participate in that
          offering or in another offering on substantially the same terms as the
          original offering (that offering or another offering being referred to
          herein as the "ALTERNATIVE TRANSACTION"). Until the completion of the
          Alternative Transaction, or until the Purchaser declines to
          participate fully in the Alternative Transaction, the Purchaser will
          be deemed to have the same share ownership percentage interest in the
          Corporation as it had prior to the Public Share Issuance in which the
          Purchaser was not permitted to participate. If the Purchaser agrees to
          participate in the Alternative Transaction but not to its full pro
          rata share, it will, immediately upon such agreement, have its share
          ownership percentage deemed to be reduced to the actual share
          ownership percentage interest it would have upon completion of such
          Alternative Transaction and, should it fail to complete the
          Alternative Transaction, the share ownership percentage interest of
          the Purchaser will be reduced to its actual level at that time.

     (d)  The pre-emptive rights pursuant to this Section 10 will terminate
          immediately and will be lost for all future time on the earlier of:
          (i) five years from the date of this Agreement; and (ii) if at any
          time, the Purchaser ceases to hold Common Shares whether or not the
          Purchaser subsequently acquires securities of the Corporation.

     (e)  Commencing 4 years and 6 months from the date of this agreement, the
          Purchaser and the Corporation will commence negotiations in good faith
          to extend the rights provided to the Purchaser in Section 10 on
          commercially reasonable terms.

11.  FIRST RIGHT OF NEGOTIATION

     (a)  Provided that the Purchaser (or its successors or assigns) continues
          to hold any Common Shares of the Corporation (the "OWNERSHIP
          THRESHOLD"), the Corporation hereby grants a right of first
          negotiation (the "RIGHTS") to the Purchaser to obtain an exclusive
          license (the "LICENSE") to develop, market, sell, promote and
          distribute (in a geographic territory to be negotiated) the next five
          Indications (the "FIVE INDICATIONS") for which the Corporation seeks a
          licensee to develop, market, sell, promote and distribute the
          applicable Indication.

     (b)  The Rights will expire on the earlier of:




                                     - 17 -

          (i)  five years from the date of this Agreement; and

          (ii) the delivery of Negotiation Notices to the Purchaser by the
               Corporation in respect of Five Indications and the earlier of:

               (A)  the expiry of the Negotiation Period in respect of each of
                    the applicable Indications; and

               (B)  the execution and delivery by each of the Purchaser and the
                    Corporation of a License and Development Agreement in
                    respect of each of the applicable Indications;

         (iii) if the holding of Common Shares by the Purchaser falls below the
               Ownership Threshold, the Purchaser's Rights under this Section 11
               will terminate immediately and will be lost for all future time
               and thereafter the Purchaser will not have any rights under
               Section 11 in respect of the Five Indications whether or not the
               Purchaser subsequently acquires securities of the Corporation.

     (c)

          (i)  The Corporation will notify the Purchaser that it wishes to
               trigger the obligations in this Section at a time determined by
               the Corporation in respect of each Indication, but not earlier
               than the initiation of the first clinical trials using human
               subjects in respect of each of the Five Indications (the
               "NEGOTIATION NOTICE").

          (ii) Upon receipt of a Negotiation Notice, each of the Corporation and
               the Purchaser will negotiate for a period of up to 60 days (the
               "NEGOTIATION PERIOD") the terms under which:

               (A)  the Purchaser would obtain the License from the Corporation
                    and its Affiliates; and

               (B)  the Purchaser and the Corporation will jointly develop the
                    applicable Indication (the "DEVELOPMENT AND LICENSE
                    AGREEMENT").

               (C)  The Development and License Agreement will contain, without
                    limitation, the following terms and conditions

                    (I)  payment terms (including, without limitation, license
                         fees, ongoing royalties, milestone payments, cost
                         sharing on joint development activities and minimum
                         sales commitments); and

                    (II) further assurances by the Corporation to assist the
                         Purchaser in obtaining any regulatory approval or
                         registration or any patent, trade-mark, trade dress or



                                     - 18 -

                         other intellectual property rights in respect of the
                         Corporation products which are necessary for the
                         marketing, sale, promotion or distribution of the
                         applicable indications.

         (iii) For greater certainty, the Corporation will not negotiate or
               enter into discussions with any other party in respect of
               licensing or development of any of the Five Indications until the
               earlier of:

               (A)  the expiry of the Negotiation Period in respect of an
                    applicable Indication;

               (B)  the execution and delivery by each of the Corporation and
                    the Purchaser of a Development and License Agreement (to the
                    extent permitted under that agreement) in respect of an
                    applicable Indication; or

               (C)  the Purchaser's ownership in the Corporation falls below the
                    Ownership Threshold.

          (iv) For greater certainty, if the Corporation and the Purchaser do
               not execute and deliver a Development and License Agreement
               before the expiry of the Negotiation Period, the Corporation will
               have no further obligations to the Purchaser in respect of that
               Indication, and the Corporation may negotiate, enter into
               discussions with and execute and deliver agreements with any
               other person in respect of the particular Indication that is the
               subject of the Negotiation Notice, provided that the Corporation
               may not offer the applicable Indication to any other party on
               terms which are materially more favourable to the other person
               than the terms offered to the Purchaser having regard to all of
               the circumstances of the applicable offers.

     (d)  Commencing 4 years and 6 months from the date of this agreement, the
          Purchaser and the Corporation will commence negotiations in good faith
          to extend the rights provided to the Purchaser in Section 11 on
          commercially reasonable terms.


12.  INTERPRETATION

All terms not otherwise defined herein will have the meaning ascribed to them in
Schedule "A" to this Agreement.

13.  FURTHER ASSURANCES

The Purchaser and the Corporation agree to deliver such documents, certificates,
assurances and other instruments as may be required to carry out the provisions
of this Subscription Agreement.



                                     - 19 -

14.  GOVERNING LAW

This Subscription Agreement is governed by the laws of the Province of Ontario
and the federal laws of Canada applicable therein. The Purchaser and the
Corporation irrevocably attorn to the jurisdiction of the courts of the Province
of Ontario.

15.  SURVIVAL

Except where specifically provided otherwise herein, this Subscription
Agreement, including without limitation the representations, warranties and
covenants contained herein, will survive and continue in full force and effect
and be binding upon the Purchaser and the Corporation notwithstanding the
completion of the purchase of the Purchased Securities by the Purchaser pursuant
hereto and any subsequent disposition by the Purchaser of the Purchased
Securities.

16.  ASSIGNMENT

This Subscription Agreement is not transferable or assignable by any party
without the consent of the other parties.

17.  COUNTERPARTS

This Subscription Agreement may be executed by fax and in counterparts, each of
which will be deemed to be an original and all of which will constitute one and
the same document.

18.  SUBSCRIPTION PARTICULARS

     (a)  The number of Purchased Units being subscribed for is 14,021,000 at a
          price equal to $0.20 per Unit, with the aggregate price of the
          Purchased Units being subscribed for being Cdn.$2,804,200.

     (b)  The Common Shares and Share Purchase Warrants that constitute the
          Purchased Units are to be registered in the name of Teva Pharma B.V.,
          whose address is Industrieweg 23, 3640 RK Mijdrecht, The Netherlands.

     (c)  The certificates representing the Common Shares and Share Purchase
          Warrants comprising the Purchased Units are to be delivered at Closing
          to counsel to the Purchaser.



                [THE REST OF THE PAGE INTENTIONALLY LEFT BLANK]


                                     - 20 -


19.  COMMUNICATIONS

Subject to applicable law, the Corporation shall provide the Purchaser with an
opportunity to review any press release, announcement or public statement to be
issued in connection with the execution of this Subscription Agreement and the
sale of the Purchased Units prior to the release thereof.

DATED this ____day of September, 2003.

TEVA PHARMA B.V.

By:
   ---------------------------------------
Name:
Title:

ACCEPTANCE

The above-mentioned Subscription Agreement is hereby accepted and agreed to by
the undersigned.

DATED at Toronto, Ontario, this ____day of September, 2003.

VIVENTIA BIOTECH INC.

By:
   ---------------------------------------
Name: Michael Byrne
Title: Chief Financial Officer and Secretary




                                  SCHEDULE "A"

In this Subscription Agreement:

1.   "Affiliate" will have the meaning set forth in the Business Corporations
     Act (Ontario).

2.   "Arm's Length" will have the meaning attributed to such term in the Income
     Tax Act (Canada).

3.   "Company Intellectual Property" means all material Intellectual Property
     owned or acquired by the Corporation and the Subsidiary or in which the
     Corporation or the Subsidiary has any rights necessary for the conduct of
     the Corporation's business as it is currently being conducted.

4.   "Corporation Products" means products developed solely by or solely on
     behalf of and for the sole benefit of, the Corporation, which for greater
     certainty, excludes products discovered pursuant to collaboration
     agreements with third parties from time to time.

5.   "Equity Securities" means equity securities (including securities which
     are, directly or indirectly, convertible, exercisable or exchangeable for
     equity securities, whether at the option of the Corporation, the holder or
     automatically) issued in connection with a Public Share Issuance.

6.   "Excluded Share Issuance" includes any issuance of securities of the
     Corporation for non-financing purposes, including, without limitation, in
     connection with:

     (a)  a business acquisition or other strategic transaction;

     (b) the Corporation's stock option or other incentive compensation plans;

     (c)  securities issued as share dividends or pursuant to the exercise of
          conversion privileges, options, or rights previously granted by the
          Corporation or issued in accordance with Section 10; or

     (d)  securities issued in connection with arm's length lease financing,
          bank financing or other similar transactions that are primarily of a
          non-equity financing nature.

 7.  "Indications" means an indication of any of the Corporation Products
     and in respect of such indication the Corporation has conducted or is
     conducting or has had or is having conducted on its behalf the first
     clinical trials using human subjects.

 8.  "Intellectual Property" means all:



     (a)  rights in respect of all trade secrets, confidential information and
          confidential know-how;

     (b)  all copyrights, whether registered or not, and all registrations and
          records of such copyrights;

     (c)  all industrial designs, design patents and other designs and all
          registrations and records of them;

     (d)  all rights pursuant to the Integrated Circuit Topography Act and all
          registrations and records of them;

     (e)  all patents and applications for patents and all inventions in each of
          them, applied for or registered in any jurisdiction, all patents which
          may issue out of such applications and all divisions, reissues,
          renewals, reexaminations, continuations, continuations in part and
          extensions;

     (f)  all trade-marks and other commercial symbols, whether registered or
          not, including:

          (i)  both registered trade and service marks (as defined in the
               Trademarks Act) and unregistered trade and service marks;

          (ii) designs, logos, indicia, distinguishing guises, trade names,
               business names and other source or business identifiers;

          (iii) fictitious characters;

          (iv) all registrations and applications for registration in respect of
               such marks or symbols that have been made in the Canadian
               Trademarks Office or any such similar office in any other
               country, all records of such registrations and applications, and
               all reissues, extensions or renewals of such registrations and
               applications;

          (v)  all common law and other rights in such marks and symbols; and

     (g)  all names, marks and symbols which are registered in the name of the
          Corporation as domain names with any Internet domain name registration
          authority.

9.   "Intellectual Property Licenses" means all licenses and other contracts
     granting the Corporation or the Subsidiary a license, right to use, or any
     other interest in Intellectual Property other than a full conveyance of all
     rights in such Intellectual Property.

10.  "Public Share Issuance" means a treasury issuance by the Corporation of
     equity securities principally for the purpose of financing of the
     Corporation that is not an Excluded Share Issuance.



                               SCHEDULE 8(a)(XVI)
                                   LITIGATION

1.   The Corporation is involved in a claim against the National Research
     Counsel of Canada, Simon Foote, Saran Narang and Colin Roger MacKenzie,
     with respect to a dispute of co-inventorship regarding specific aspects of
     the Corporation's H-11 based invention entitled "antigen binding fragments
     that specifically detects cancer cells, nucleotides encoding the fragments
     and use thereof for the prophylaxis and detection of cancers" and the
     related patents and patent applications.

2.   The Corporation is involved in a claim against it and seven other parties,
     including Novopharm Ltd., by First Monitor Canada Inc. for the alleged
     breach of a distribution agreement between the plaintiff and Novopharm Ltd.




                              SCHEDULE 8(a)(XXXI)
                             INTELLECTUAL PROPERTY


Status as of August 26, 2003                               PAGE 1



PATENT/
APPLICATION         PRODUCT    TITLE                       FILED               COUNTRY    PATENT NO.            DATE OF ISSUE
                                                                                               
95 922 373.6        A6         Human Monoclonal            June 16, 1995       Europe      EP 0 766 736          September 12, 2001
                               Antibodies Specific to
                               Cell Cycle Independent
                               Glioma Surface(A6)

695 22 689.4-08     A6         Human Monoclonal            November 5, 2001    Germany     DE 695 22 689.4-08    April 12, 2002
                               Antibodies Specific to
                               Cell Cycle Independent
                               Glioma Surface(A6)

EP 0 766 736        A6         Human Monoclonal            November 5, 2001    France
                               Antibodies Specific to
                               Cell Cycle Independent
                               Glioma Surface(A6)

EP 0 766 736        A6         Human Monoclonal            November 5, 2001    U.K.
                               Antibodies Specific to
                               Cell Cycle Independent
                               Glioma Surface(A6)

08/264,093          A6         Human Monoclonal            June 21, 1994       U.S.        5,639,863             June 17, 1997
                               Antibodies Specific to
                               Cell Cycle Independent
                               Glioma Surface(A6)

33696/97            H11        Antigen Binding Fragments   May 22, 1997        Australia   725238                January 25, 2001
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

PI 9710811-1        H11        Antigen Binding Fragments   November 10, 1998   Brazil
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

2,255,540           H11        Antigen Binding Fragments   May 22, 1997        Canada
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

CN 97194815.1       H11        Antigen Binding Fragments   November 28, 1998   China
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

97929703.3          H11        Antigen Binding Fragments   May 22, 1997        Europe
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

P9902713            H11        Antigen Binding Fragments   May 22, 1997        Hungary
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

127193              H11        Antigen Binding Fragments   November 28, 1998   Israel
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers


                              INTELLECTUAL PROPERTY
                              VIVENTIA BIOTECH INC.
PATENT/                       CONFIDENTIAL INFORMATION
APPLICATION                    A BRIEF STATUS
                           
95 922 373.6                  [


                                             ]

695 22 689.4-08               [


                                             ]

EP 0 766 736                  [


                                             ]

EP 0 766 736                  [


                                             ]

08/264,093                    [


                                             ]

33696/97                      [






                                             ]

PI 9710811-1                  [






                                             ]

2,255,540                     [






                                             ]

CN 97194815.1                 [






                                             ]

97929703.3                    [






                                             ]

P9902713                      [






                                              ]

127193                        [





                                              ]






Status as of August 26, 2003                               PAGE 2



PATENT/             PRODUCT    TITLE                       FILED               COUNTRY     PATENT NO.            DATE OF ISSUE
APPLICATION
                                                                                               
9-542853            H11        Antigen Binding Fragments   May 22, 1997        Japan
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

989695              H11        Antigen Binding Fragments   May 22, 1997        Mexico
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

332566              H11        Antigen Binding Fragments   May 22, 1997        New Zealand  332566               December 7, 2000
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

985,150             H11        Antigen Binding Fragments   May 22, 1997        Norway
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

9805601-3           H11        Antigen Binding Fragments   May 22, 1997        Singapore    60444                April 18, 2000
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

09/194,164          H11        Antigen Binding Fragments   November 20, 1998   US
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

101,108             H11        Antigen Binding Fragments   May 22, 2000        Hong Kong
                               (H11) That Specifically
                               Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

505305              H11        Antigen Binding Fragments   June 21, 2000       N.Zealand    NZ 505305            October 7, 2002
(Divisional of                 (H11) That Specifically
332566)                        Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

72432/00            H11        Antigen Binding Fragments   December 20, 2000   Australia
(Divisional of AU              (H11) That Specifically
Patent 725238)                 Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

08/862,124          H11        Antigen Binding Fragments   May 22, 1997        US           6,207,153            March 27, 2001
(Priority over                 (H11) That Specifically
08/657,449); CIP)              Detect Cancer Cells,
                               Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

09/782,397 (2nd     H11        Antigen Binding Fragments   February 13, 2001   US           Publication No.      January 30, 2003
Continuation of                (H11) That Specifically                                      US-2003-0021779-A1
US Application                 Detect Cancer Cells,
No. 08/862,124)                Nucleotides Encoding The
                               Fragments, And Use
                               Thereof For The
                               Prophylaxis And Detection
                               Of Cancers

10/290,703 (New     4B5*       Antigen Binding Fragments   November 8, 2002    US          Published              June 23, 2003
Continuation of                Designated 4B5, That
09/747,669                     Specifically Detect
12/21/2000 which               Cancer Cells, Nucleotides
is a Continuation              Encoding the Fragments,
of 09/111,286                  and Use Thereof for the
07/07/1998                     Prophylaxis and Detection
(Abandoned) which              of Cancers
claims benefit of
60/051,945
07/08/1997)

79273/98            4B5*       Antigen Binding Fragments   December 23, 1999   Australia
                               Designated 4B5, That
                               Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers



                                INTELLECTUAL PROPERTY
                                VIVENTIA BIOTECH INC.
PATENT/                         CONFIDENTIAL INFORMATION
APPLICATION                     A BRIEF STATUS
                             
9-542853                       [







                                              ]

989695                         [






                                              ]

332566                         [







                                              }
985,150                        [






                                              ]

9805601-3                      [






                                               ]

09/194,164                     [






                                              ]

101,108                        [






                                              ]

505305                          [
(Divisional of
332566)




                                               ]

72432/00                       [
(Divisional of AU
Patent 725238)





                                               ]
08/862,124
(Priority over
08/657,449); CIP)

                                               ]




09/782,397 (2nd               [
Continuation of
US Application
No. 08/862,124)



                                                ]

10/290,703 (New               [
Continuation of
09/747,669
12/21/2000 which
is a Continuation
of 09/111,286
07/07/1998
(Abandoned) which
claims benefit of
60/051,945
07/08/1997)                                     ]

79273/98                       [





                                                ]


Status as of August 26, 2003                               PAGE 3



PATENT/             PRODUCT    TITLE                       FILED               COUNTRY     PATENT NO.            DATE OF ISSUE
APPLICATION
                                                                                               
2002301149          4B5*       Antigen Binding Fragments   September 23, 2002  Australia
(Divisional of                 Designated 4B5, That
79273/98)                      Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers

98929569.6          4B5*       Antigen Binding Fragments   January 10, 2000    Europe
                               Designated 4B5, That
                               Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers

2000-502064         4B5*       Antigen Binding Fragments   December 23, 1999   Japan
                               Designated 4B5, That
                               Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers

501990              4B5*       Antigen Binding Fragments   December 23, 1999   New Zealand  501990                  January 7, 2003
                               Designated 4B5, That
                               Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers

2,295,375         4B5*         Antigen Binding Fragments   December 24, 1999   Canada
                               Designated 4B5, That
                               Specifically Detect
                               Cancer Cells, Nucleotides
                               Encoding the Fragments,
                               and Use Thereof for the
                               Prophylaxis and Detection
                               of Cancers

548378            4B5*         Anti-idiotypic antibody     October 23, 1995    U.S.        US 5,653,977          August 5, 1997
                               that mimics the GD2
                               antigen

10/070,503 based  Camelized A6 Enhanced Phage Display      March 7, 2002       U.S.
on PCT/CA00/01027              Libraries and Methods for
filed September                Producing Same (based on
7, 2000                        Carmelized A6)

00 960243-4       Camelized A6 Enhanced Phage Display      March 3, 2002       Canada
                               Libraries and Methods for
                               Producing Same (based on
                               Carmelized A6)

00 960243-4       Camelized A6 Enhanced Phage Display      March 12, 2002      Europe      EP Publication        Published: June 19,
                               Libraries and Methods for                                   No.1 214 352          2002
                               Producing Same (based on
                               Carmelized A6)

PCT/CA01/01845    Llama A6     Phage Display Libraries     December 21, 2001   Canada
(PCT filed on                  of Human VH Fragments
Provisional
60/258,031)

PCT/CA01/01845    Llama A6     Phage Display Libraries    Priority from        Canada
(National Phase                of Human VH Fragments      Provisional filed
Entry in Canada)                                          December 21, 2000
Official S. No
and filing date
awaited.

PCT/CA01/01845    Llama A6     Phage Display Libraries   Priority from         U.S.
(National Phase                of Human VH Fragments     Provisional filed
Entry in Canada)                                         December 21, 2000
Official S. No
and filing date
awaited.

PCT/CA01/01845    Llama A6     Phage Display Libraries   Priority from         Europe
(National Phase                of Human VH Fragments     Provisional filed
Entry in Canada)                                         December 21, 2000
Official S. No
and filing date
awaited.

2,424,255 (1st    VB4-845      Immunotoxin               March 26, 2003        Canada
Provisional filed
in Canada)

60/466,608        VB4-845      Methods for Treating      April 30, 2003        U.S.
                               Cancer Using a
                               Recombinant Immunotoxin

2nd U.S.          VB4-845      Methods for Treating      yet to be filed,      U.S.
Provisional                    Cancer Using a            final draft
(filing imminent)              Recombinant Immunotoxin   application being
                                                         reviewed.
[



                  INTELLECTUAL PROPERT
                  VIVENTIA BIOTECH INC.
PATENT/           CONFIDENTIAL INFORMATION
APPLICATION       A BRIEF STATUS
               
2002301149        [
(Divisional of
79273/98)




                                         ]

98929569.6        [






                                         ]

2000-502064       [






                                        ]

501990           [






                                        ]

2,295,375        [






                                        ]

548378



10/070,503 based   [
on PCT/CA00/01027
filed September 7,
2000
                                        ]

00 960243-4        [


                                        ]

00 960243-4        [


                                        ]

PCT/CA01/01845     [
(PCT filed on
Provisional
60/258,031)                             ]

PCT/CA01/01845     [
(National Phase
Entry in Canada)
Official S. No
and filing date
awaited.                                ]

PCT/CA01/01845      [
(National Phase
Entry in Canada)
Official S. No
and filing date
awaited.                                ]

PCT/CA01/01845       [
(National Phase
Entry in Canada)
Official S. No
and filing date
awaited.                                ]

2,424,255 (1st        [
Provisional filed
in Canada)                              ]

60/466,608



2nd U.S.              [
Provisional
(filing imminent)                        ]

[





                                                                                                                                ]