BIOCHEM PHARMA INC
F-3/A, 1998-05-27
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>   1
 
   
      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 27, 1998
    
                                            REGISTRATION NO. 333-45871/333-48521
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
   
                               AMENDMENT NO. 4 TO
    
                                    FORM F-1
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933
                                  ------------
                           CLINICHEM DEVELOPMENT INC.
                          DEVELOPPEMENT CLINICHEM INC.
             (Exact name of registrant as specified in its charter)
                                  ------------
 
                                     CANADA
         (State or other jurisdiction of incorporation or organization)
                                      2834
            (Primary Standard Industrial Classification Code Number)
                                 NOT APPLICABLE
                    (I.R.S. Employer Identification Number)
 
   275 ARMAND-FRAPPIER BLVD., LAVAL, QUEBEC, CANADA H7V 4A7  TELEPHONE: (514)
                                    978-7800
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)
                                  ------------
                             CT CORPORATION SYSTEM
          1633 BROADWAY, NEW YORK, NY 10015  TELEPHONE: (212) 664-1666
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                                  ------------
 
   
                                AMENDMENT NO. 2
    
                                    FORM F-3
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933
                                  ------------
                              BIOCHEM PHARMA INC.
             (Exact name of registrant as specified in its charter)
                                  ------------
 
                                     CANADA
         (State or other jurisdiction of incorporation or organization)
                                      2834
            (Primary Standard Industrial Classification Code Number)
                                 NOT APPLICABLE
                    (I.R.S. Employer Identification Number)
 
   275 ARMAND-FRAPPIER BLVD., LAVAL, QUEBEC, CANADA H7V 4A7  TELEPHONE: (514)
                                    978-7800
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)
                                  ------------
                             CT CORPORATION SYSTEM
          1633 BROADWAY, NEW YORK, NY 10015  TELEPHONE: (212) 664-1666
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                                  ------------
 
                                   Copies to:


                    LANCE C. BALK, ESQ.
                      KIRKLAND & ELLIS
    153 EAST 53RD STREET, NEW YORK, NEW YORK 10022-4675
                 TELEPHONE: (212) 446-4800
 
<TABLE>
<CAPTION>
<S>                                                           <C>
                    LANCE C. BALK, ESQ.                                            CHARLES-A. TESSIER
                      KIRKLAND & ELLIS                                            BIOCHEM PHARMA INC.
    153 EAST 53RD STREET, NEW YORK, NEW YORK 10022-4675         275 ARMAND-FRAPPIER BLVD., LAVAL, QUEBEC, CANADA H7V 4A7
                 TELEPHONE: (212) 446-4800                                     TELEPHONE: (514) 978-7800
                                                                 VICE-PRESIDENT, LEGAL AFFAIRS AND CORPORATE SECRETARY
</TABLE>
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
        practicable after this Registration Statement becomes effective.
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box.  [X] *
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]
                                  ------------
 
                        CALCULATION OF REGISTRATION FEE
<TABLE>
<S>                                                    <C>                       <C>
======================================================
TITLE OF EACH CLASS OF SECURITIES                               AMOUNT            PROPOSED MAXIMUM AGGREGATE
TO BE REGISTERED                                          TO BE REGISTERED(1)         OFFERING PRICE(2)
- ------------------------------------------------------
Class A Common Shares.................................    2,800,000 shares()          US$105,000,000.00
- ------------------------------------------------------
BioChem Common Shares, without par value(4)...........    1,984,915 shares(5)
======================================================
 
<CAPTION>
<S>                                                     <C>
======================================================
TITLE OF EACH CLASS OF SECURITIES                         PROPOSED MAXIMUM AMOUNT
TO BE REGISTERED                                           OF REGISTRATION FEE(3)
- ------------------------------------------------------
Class A Common Shares.................................          US$30,975.00
- ------------------------------------------------------
BioChem Common Shares, without par value(4)...........
======================================================
</TABLE>
 
(1) Based on an estimate of the maximum number of shares issuable in connection
   with the distribution described herein.
 
(2) Estimated solely for the purpose of calculating the registration statement
   fee pursuant to Rule 457(f)(2) under the Securities Act of 1933 based on the
   adjusted book value of the Class A Common Shares of the Registrant after
   giving effect to the distribution described herein. No consideration will be
   paid by the recipients of the securities. The exchange rate of US$0.7000 used
   to calculate the adjusted book value of the Class A Common Shares of the
   Registrant was based on the noon buying rate on February 6, 1998 in New York
   City for cable transfers in Canadian dollars for one United States dollar as
   certified for customs purposes by the Federal Reserve Bank of New York.
(3) Previously Paid.
(4) The Class A Common Shares may be converted into such shares upon exercise of
   the Purchase Option (as defined) with respect to the Class A Common Shares.
   Pursuant to Rule 457(i) under the Securities Act of 1933, as amended, no
   separate fee is required with respect to these BioChem Common Shares.
(5) Estimated number of shares issuable in payment of the exercise price of the
   Purchase Option based upon a price of US$25.19 per BioChem Common Share, the
   average of the high and low prices per BioChem Common Share as reported on
   the Nasdaq National Market on May 4, 1998. An additional indeterminable
   number of shares are also being registered to cover any adjustments required
   by (i) fluctuations in the price per BioChem Common Share and the
   corresponding number of Biochem Common Shares required to be issued in
   payment of the exercise price of the Purchase Option and (ii) stock splits or
   similar events.
 
    The Registrants hereby amend this Registration Statement on such date or
dates as may be necessary to delay its effective date until the registrants
shall file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.
 
* With respect to the Form F-3.
================================================================================
<PAGE>   2
 
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission. These securities may not be sold nor
     may offers to buy be accepted prior to the time the registration statement
     becomes effective. This prospectus shall not constitute an offer to sell or
     the solicitation of an offer to buy nor shall there be any sale of these
     securities in any jurisdiction in which such offer, solicitation or sale
     would be unlawful prior to registration or qualification under the
     securities laws of any such jurisdiction.
 
                 SUBJECT TO COMPLETION, DATED           , 1998
PROSPECTUS
 
                           CLINICHEM DEVELOPMENT INC.
                        2,706,475 CLASS A COMMON SHARES
                              BIOCHEM PHARMA INC.
                            1,984,915 COMMON SHARES
                            ------------------------
 
     The callable Class A Common Shares (the "CliniChem Common Shares") of
CliniChem Development Inc. ("CliniChem") will be distributed (the
"Distribution") by BioChem Pharma Inc. ("BioChem") to the holders of record (the
"Holders") of BioChem Common Shares (the "BioChem Common Shares") at the close
of business on           , 1998 (the "Record Date"). Each Holder will receive
one CliniChem Common Share for every 40 BioChem Common Shares held on the Record
Date. The Distribution will result in all of the then outstanding CliniChem
Common Shares being distributed to the Holders. Assuming that 108,258,990
BioChem Common Shares (the number of BioChem Common Shares outstanding on
January 31, 1998) are outstanding on the Record Date, approximately 2,706,475
CliniChem Common Shares are expected to be issued in the Distribution to
Holders. After the Distribution, BioChem will hold 1,000 Class B Common Shares
(the "Class B Shares") of CliniChem, representing all of the authorized shares
of such class. Prior to the Distribution, BioChem will contribute $150 million
in cash to CliniChem as a capital contribution. As the holder of the majority of
the outstanding Class B Shares following the Distribution, BioChem will have the
option to acquire all (but not less than all) of the outstanding CliniChem
Common Shares under specified conditions. The BioChem Common Shares offered
pursuant to this Prospectus are being registered under the Securities Act in the
event that BioChem chooses to pay the Purchase Option Exercice Price in BioChem
Common Shares or a combination of cash and Biochem Common Shares. BioChem has
also granted certain technology licenses and agreed to make specified payments
on sales of certain products.
 
     The Distribution is expected to be taxable to the Holders. A portion of the
CliniChem Common Shares otherwise deliverable to certain Holders who are not
residents of Canada will be withheld and sold on such Holders' behalf in order
to pay any Canadian withholding tax for which such Holders are liable. Such
sales of CliniChem Common Shares will be effected following the Distribution
pursuant to Regulation S under the Securities Act in one or more offshore
transactions, including open-market transactions on a Canadian stock exchange,
which are not subject to the registration requirements of the Securities Act and
applicable state securities laws. See "The Distribution" and "Income Tax
Considerations."
 
     The Distribution is expected to take place on or about           , 1998,
subject to certain conditions specified in the Distribution Agreement between
BioChem and CliniChem dated as of           , 1998. General Trust of Canada is
acting as distribution agent and will be responsible for distributing share
certificates to CliniChem shareholders. Neither BioChem nor CliniChem will
receive any proceeds in connection with the Distribution. See "The
Distribution."
 
     There has been no previous public market for the CliniChem Common Shares.
Application has been made for the CliniChem Common Shares to be quoted on the
Nasdaq National Market (the "Nasdaq") under the symbol "CCHE". The Montreal
Exchange and The Toronto Stock Exchange have conditionally agreed to list the
CliniChem Common Shares, subject to compliance with the requirements of these
exchanges on or before June 15, 1998.
 
     BioChem will have the option to acquire all (but not less than all) of the
outstanding CliniChem Common Shares at a price determined in accordance with a
formula (the "Purchase Option Exercise Price") specified in the articles of
incorporation of CliniChem (the "Articles") at any time from and after the
Distribution and ending on the earlier of (i) March 31, 2003 or (ii) the 90th
day after the date on which CliniChem provides BioChem with quarterly financial
statements of CliniChem showing cash and cash equivalents of less than $5.0
million (unless extended by BioChem but in no event beyond March 31, 2003). The
Purchase Option Exercise Price may be paid by BioChem in cash, BioChem Common
Shares or any combination of cash and BioChem Common Shares at BioChem's
discretion. See "The Agreements and the Purchase Option--Purchase Option."
 
     Shareholders of BioChem with inquiries regarding the Distribution should
contact BioChem Pharma Inc., 275 Armand-Frappier Blvd., Laval, Quebec, Canada
H7V 4A7, Attn: Investor Relations; Telephone: (514) 978-7771.
                            ------------------------
 
THE CLINICHEM COMMON SHARES DISTRIBUTED HEREUNDER INVOLVE A HIGH DEGREE OF RISK.
                  SEE "RISK FACTORS" COMMENCING ON PAGE 19.
                            ------------------------
 
NO APPROVAL OF THE DISTRIBUTION BY SHAREHOLDERS OF BIOCHEM IS REQUIRED OR
 SOUGHT. NO PROXY IS REQUESTED AND NO ACTION IS REQUIRED WITH RESPECT TO THE
                                 DISTRIBUTION.
                            ------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
  AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
      ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
                        CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------
 
ALL REFERENCES IN THIS PROSPECTUS TO "$" AND "DOLLARS" ARE TO CANADIAN DOLLARS,
                            UNLESS OTHERWISE STATED.
                            ------------------------
 
                The date of this Prospectus is           , 1998.
<PAGE>   3
 
                             AVAILABLE INFORMATION
 
     As a result of the Distribution, CliniChem will be subject to the
information and reporting requirements of the United States Securities Exchange
Act of 1934, as amended (the "Exchange Act"), applicable to foreign private
issuers, and, in accordance therewith, will be required to file reports and
other information with the Securities and Exchange Commission ("SEC"). Holders
of CliniChem Common Shares will receive annual reports containing financial
information including the report of independent chartered accountants as to the
financial statements of CliniChem. Such financial statements will be prepared in
accordance with generally accepted accounting principles in Canada and will be
reconciled to generally accepted accounting principles in the United States in a
note thereto.
 
     BioChem is subject to the information and reporting requirements of the
Exchange Act applicable to foreign private issuers and in accordance therewith
files reports and other information with the SEC.
 
     BioChem and CliniChem have filed with the SEC a Registration Statement
(including all amendments thereto, the "Registration Statement") under the
United States Securities Act of 1933, as amended (the "Securities Act"), with
respect to the securities offered by this Prospectus. This Prospectus does not
contain all the information set forth in the Registration Statement and the
exhibits thereto. Reference is made to the Registration Statement and to the
exhibits thereto for further information with respect to BioChem and CliniChem
and the Distribution. Statements contained in this Prospectus as to the contents
of any contract or any other document referred to are not necessarily complete,
and, in each instance, reference is made to the copy of such contract or
document filed as an exhibit to the Registration Statement, each such statement
being qualified in all respects by such reference to such exhibit. The
Registration Statement relates to the securities being offered in the United
States and to the securities being offered outside the United States insofar as
they may be resold from time to time in the United States. The Registration
Statement, including exhibits and schedules thereto, may be inspected without
charge at the Public Reference Room of the SEC, 450 Fifth Street, Washington,
D.C. 20549 and at the SEC's regional offices at 7 World Trade Center, Suite
1300, New York, New York 10048 and at 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661. Copies of all or any part thereof may be obtained from
the SEC at its principal offices in Washington, D.C. after payment of fees
prescribed by the SEC. The Registration Statement and the exhibits thereto are
available on the SEC's Internet website (http://www.sec.gov).
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents previously filed with the SEC by BioChem pursuant
to the Exchange Act are incorporated herein by this reference:
 
   
     (i)   BioChem's Annual Information Form on Form 20-F for the fiscal year
        ended December 31, 1996 and its Amended Annual Information Form on Form
        20-F/A for the fiscal year ended December 31, 1997.
    
 
   
     (ii)  BioChem's Reports on Form 6-K filed with the SEC on June 9, 1997,
        August 19, 1997, February 17, 1998, April 6, 1998, April 9, 1998 and May
        5, 1998.
    
 
     In addition, all filings on Form 20-F filed by BioChem pursuant to the
Exchange Act, and, to the extent so designated therein, any reports on Form 6-K
of BioChem, after the initial filing of the Registration Statement of which this
Prospectus forms a part, after the date of this Prospectus and prior to the
Distribution shall be deemed incorporated by reference in this Prospectus and to
be a part hereof from the date any such document is filed. Any statements
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes hereof to the
extent that a statement contained herein (or in any other subsequently filed
document which also is incorporated by reference herein) modifies or supersedes
such statement. Any statement so modified or superseded shall not be deemed to
constitute a part hereof except as so modified or superseded. All information
appearing in this Prospectus is qualified in its entirety by the information and
consolidated financial statements (including notes thereto) appearing in the
documents incorporated herein by reference, except to the extent set forth in
the immediately preceding sentence.
 
                                        2
<PAGE>   4
 
     Copies of documents incorporated by reference with respect to BioChem that
are not presented herein or delivered herewith (not including exhibits to such
documents unless such exhibits are specifically incorporated by reference in
such documents or herein) are available without charge to any person to whom
this Prospectus is delivered upon written or oral request to BioChem's principal
executive office: BioChem Pharma Inc., 275 Armand-Frappier Blvd., Laval, Quebec,
Canada H7V 4A7, Attn: Investor Relations.
 
                      ENFORCEABILITY OF CIVIL LIABILITIES
                  UNDER UNITED STATES FEDERAL SECURITIES LAWS
 
     BioChem and CliniChem are Canadian corporations. Most of BioChem's and all
of CliniChem's directors, officers and controlling persons, as well as certain
of the experts named herein, reside outside the United States, and all or a
substantial portion of the assets of such persons and of BioChem and CliniChem
are located outside the United States. Consequently, it may be difficult or
impossible for investors to effect service of process within the United States
upon BioChem, CliniChem or such persons, or to realize against them upon
judgments of courts of the United States predicated upon civil liabilities under
the federal securities laws of the United States. There is doubt as to the
enforceability in Canada against BioChem, CliniChem or any of their directors
and officers or experts named herein who are not residents of the United States
in original actions or in actions for enforcement of judgments rendered by
United States courts, of civil liabilities predicated solely on United States
federal securities laws. In addition, investors should not assume that courts of
Canada (i) would enforce judgments of United States courts obtained in actions
against BioChem or CliniChem in the United States or such persons predicated
upon the civil liability provisions of the United States federal securities laws
or the securities or blue sky laws of any state within the United States or (ii)
would enforce, in original actions, liabilities against BioChem, CliniChem or
such persons predicated upon the United States federal securities laws or any
such state securities or blue sky laws.
 
     BioChem and CliniChem have irrevocably appointed CT Corporation System as
its agent to receive service of process solely in actions against it arising out
of or in connection with the United States federal securities laws or out of
violations of such laws in any federal court or state court in New York, New
York, relating to the transactions covered by this Prospectus.
 
                                   TRADEMARKS
 
     All company and product names referred to in this document are the property
of their respective owners.
 
     BioChem's discovery to treat Human Immunodeficiency Virus ("HIV"),
including Acquired Immunodeficiency Syndrome ("AIDS"), sold in certain countries
under the brand name 3TC and in others under the brand name Epivir, has the
generic name lamivudine. Lamivudine is also being developed to treat chronic
hepatitis B infection. To avoid confusion herein, 3TC will be used to describe
the product for HIV or AIDS and lamivudine will be used to describe the product
in development for chronic hepatitis B infection. 3TC and Epivir are trademarks
of Glaxo Wellcome plc which, with its subsidiaries, is the worldwide licensee of
3TC and lamivudine, subject to special arrangements for Canada, where a Glaxo
Wellcome -- BioChem partnership is commercializing 3TC and will commercialize
lamivudine.
 
                               EXCHANGE RATE DATA
 
     As of February 6, 1998, the date of the balance sheet of CliniChem, and ,
1998, the most recent practicable date prior to the date of this Prospectus, the
exchange rates based on the noon buying rate in New York City for cable
transfers in Canadian dollars for one United States dollar as certified for
customs purposes by the Federal Reserve Bank of New York, were respectively
US$0.7000 and                          .
 
ALL REFERENCES IN THIS PROSPECTUS TO "$" AND "DOLLARS" ARE TO CANADIAN DOLLARS,
                            UNLESS OTHERWISE STATED.
 
                                        3
<PAGE>   5
 
                               PROSPECTUS SUMMARY
 
     THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY THE MORE DETAILED
INFORMATION SET FORTH ELSEWHERE IN THIS PROSPECTUS OR THE REGISTRATION STATEMENT
OF WHICH THIS PROSPECTUS IS A PART.
 
     CERTAIN CAPITALIZED TERMS USED IN THIS SUMMARY ARE DEFINED ELSEWHERE IN
THIS PROSPECTUS, INCLUDING IN THE GLOSSARY.
 
     Some of the statements made in this Prospectus and the accompanying letter
to shareholders are forward-looking in nature, including but not limited to,
CliniChem's and BioChem's research and development activities and plans,
particularly with respect to anticipated CliniChem Programs and CliniChem
Products, plans concerning the potential commercialization of the CliniChem
Products, and other statements that are not historical facts. The occurrence of
the events described and the achievement of the intended results are subject to
the future occurrence of many events, some or all of which are not predictable
or within CliniChem's control; therefore, actual results may differ materially
from those anticipated in any forward-looking statements. Many risks and
uncertainties are inherent in the biotechnology and pharmaceutical industry;
others are more specific to CliniChem's business. These risks include the risks
associated with product research and development, including clinical
development, attempts to obtain regulatory clearance to market products and
medical acceptance of products, changes in the health care marketplace, patent
and intellectual property matters, regulatory and manufacturing issues, the
ability to commercialize products effectively, and risks associated with
competition from other companies. Many of the risks are described in "Risk
Factors" beginning on page 19 and/or in documents filed by BioChem under the
Exchange Act or applicable Canadian securities legislation. CliniChem will not
update the information contained in this Prospectus except in the normal course
of its public disclosure practices.
 
Distributing Company.......  BioChem Pharma Inc., a Canadian corporation, is a
                             leading bio-pharmaceutical company engaged in the
                             research, development and marketing of therapeutic
                             products and the research, development,
                             manufacturing and marketing of vaccine and
                             diagnostic products for a wide range of infectious
                             and other diseases.
 
                             BioChem conducts its business through BioChem
                             Therapeutic Inc., BioChem Vaccines Inc., BioChem
                             ImmunoSystems Inc. and BioChem's foreign
                             subsidiaries. BioChem's most significant
                             therapeutic product is a novel nucleoside analog,
                             marketed under the brand name 3TC, developed with
                             Glaxo Wellcome plc and its subsidiaries
                             (hereinafter collectively "Glaxo Wellcome") for the
                             treatment of patients with HIV infection, including
                             AIDS. The nucleoside analog is marketed under the
                             brand names 3TC or Epivir. Lamivudine, a different
                             dosage regimen of 3TC, is also being developed with
                             Glaxo Wellcome as a treatment for chronic hepatitis
                             B infection, including in the pre-and post-liver
                             transplant setting to prevent graft re-infection by
                             human hepatitis B virus. BioChem has also
                             developed, and is manufacturing and marketing, a
                             line of vaccines including whole virus and split
                             virus influenza vaccines, a combined diphtheria
                             tetanus vaccine and a vaccine to prevent
                             tuberculosis. BioChem has also developed and is
                             manufacturing an immuno-therapeutic product used in
                             the treatment of certain superficial bladder
                             cancers. BioChem's diagnostics operations engage in
                             the research, development, manufacturing and
                             marketing of a wide range of diagnostic products
                             and automated laboratory analyzers for the
                             detection of a variety of infectious diseases, and
                             for use in immunology, endocrinology and
                             hematology.
 
                             References herein to "BioChem" include BioChem
                             Pharma Inc. and its subsidiaries.
                                        4
<PAGE>   6
 
Distributed Company........  CliniChem Development Inc., a Canadian corporation,
                             is a company recently formed by BioChem to conduct
                             research and development of potential human
                             therapeutic and vaccine products primarily for
                             treatment of cancer and HIV infection and the
                             prevention of certain infectious diseases.
                             CliniChem's therapeutic program includes a novel
                             nucleoside analog to treat various forms of cancer,
                             a novel nucleoside analog to treat HIV infection
                             and small molecules to treat solid cancer tumors by
                             inhibiting angiogenesis. CliniChem's vaccine
                             program includes vaccines against Neisseria
                             meningitidis, Streptococcus pneumoniae, Neisseria
                             gonorrhoeae, Haemophilus influenzae, Streptococcus
                             Group B and Chlamydia pneumoniae, all bacteria
                             responsible for infectious diseases. Upon
                             development and regulatory approval of any such
                             products, CliniChem expects that the products will
                             be marketed under distinct brand names. CliniChem
                             has not yet conducted any business and has no
                             employees. Its three officers are full-time
                             employees of BioChem. CliniChem does not intend to
                             perform any research and development itself, but
                             rather will contract with BioChem to perform all
                             such activities pursuant to the terms of the
                             Research and Development Agreement.
 
   
The Distribution...........  Prior to the closing of the Distribution, BioChem
                             will contribute $150 million in cash to CliniChem
                             as a capital contribution. The shares of CliniChem
                             currently held by BioChem will then be exchanged
                             for the CliniChem Common Shares and CliniChem Class
                             B Common Shares. On the date of closing of the
                             Distribution, each Holder of BioChem Common Shares
                             will receive one CliniChem Common Share for every
                             40 BioChem Common Shares held on the Record Date. A
                             total of approximately 2,706,475 CliniChem Common
                             Shares, being all of the CliniChem Common Shares
                             then held by BioChem, are expected to be
                             distributed. No Holder will be required to pay any
                             cash or other consideration for the CliniChem
                             Common Shares received in the Distribution
                             (exclusive of applicable Canadian withholding
                             taxes), nor will any action be required to be taken
                             by any Holder in order to receive CliniChem Common
                             Shares. The Distribution is expected to be taxable
                             to the Holders. See "Income Tax Considerations."
                             Neither BioChem nor CliniChem will receive any
                             proceeds in connection with the Distribution. See
                             "The Distribution." As of January 31, 1998, there
                             were 97 holders of record of BioChem Common Shares
                             who were United States residents, representing
                             approximately 60% of the outstanding BioChem Common
                             Shares.
    
 
CliniChem Common Shares....  All of the Class A Common Shares of CliniChem will
                             be subject to the Purchase Option whereby the
                             holder of the majority of the outstanding Class B
                             Shares can require holders of the CliniChem Common
                             Shares to sell their CliniChem Common Shares to the
                             holder of the majority of the outstanding Class B
                             Shares at the Purchase Option Exercise Price. The
                             decision to exercise the Purchase Option by the
                             holder of the majority of the outstanding Class B
                             Shares will depend on the circumstances prevailing
                             at the time consideration is given to its exercise
                             and will be based on a number of factors which are
                             currently unknown, including the extent to which
                             CliniChem is successful in pursuing the CliniChem
                             Programs and whether or not the CliniChem Programs
                             will fit such holder's business strategies at that
                             time. The Class B Shares are freely transferable.
                             Any subsequent holder of a majority of the
                             outstanding
                                        5
<PAGE>   7
 
   
                             Class B Shares may not possess the financial
                             resources necessary to exercise the Purchase Option
                             and may be unable or unwilling to register or
                             qualify securities issued by it upon exercise of
                             the Purchase Option in exchange for the CliniChem
                             Common Shares. See "The Agreements and the Purchase
                             Option--Purchase Option" and "Description of
                             CliniChem's Share Capital."
    
 
Record Date; Distribution
Date.......................  The Record Date for the Distribution will be the
                             close of business on                , 1998.
                             Distribution of the CliniChem Common Shares is
                             expected to take place on or about                ,
                             1998 (the "Distribution Date"), subject to certain
                             conditions specified in the Distribution Agreement.
 
Contribution by BioChem....  Prior to the Distribution, BioChem will contribute
                             $150 million in cash to CliniChem as a capital
                             contribution, thereby reducing the amount of
                             BioChem's cash and temporary investments by that
                             amount. As the holder of the majority of the
                             outstanding Class B Shares following the
                             Distribution, BioChem will have the option to
                             acquire all (but not less than all) of the
                             outstanding CliniChem Common Shares under specified
                             conditions. See "Business of CliniChem--General."
                             BioChem has also granted certain technology
                             licenses and agreed to make specified payments on
                             sales of certain products by BioChem should BioChem
                             exercise the Product Option. See "The Agreements
                             and the Purchase Option."
 
The CliniChem Programs.....  It is anticipated that CliniChem will initially
                             conduct its therapeutic development program (the
                             "Therapeutic Program") and its vaccine development
                             program (the "Vaccine Program"), the technology for
                             which will be licensed to CliniChem by BioChem
                             pursuant to the Technology License Agreement,
                             subject to certain third-party rights and the
                             receipt of certain third-party consents and subject
                             further to the terms and conditions of the Research
                             and Development Agreement and the Product Option.
                             See "The Agreements and the Purchase Option". In
                             addition, BioChem has the right, with the consent
                             of the Board of Directors of CliniChem, to expand
                             the scope of the Therapeutic Program and the
                             Vaccine Program and select additional development
                             programs as substitutes for, or in addition to, the
                             Therapeutic Program and the Vaccine Program (any
                             such development programs, together with the
                             Therapeutic Program and the Vaccine Program, being
                             the "CliniChem Programs"). The CliniChem Programs,
                             which are described more fully in the section
                             entitled "The Business of CliniChem--The CliniChem
                             Programs", are the development of:
 
                             -  BCH-4556, a novel nucleoside analog to treat
                             cancer;
 
                             -  BCH-10652, a novel nucleoside analog to treat
                             HIV infection;
 
                             -  small molecules to treat solid cancer tumors by
                                inhibiting angiogenesis through the antagonism
                                of the a(n)b(3) receptor;
 
                             -  a recombinant protein vaccine to protect against
                                infection by Neisseria meningitidis;
 
                             -  a recombinant protein vaccine to protect against
                                infection by Streptococcus pneumoniae;
 
                             -  a recombinant protein vaccine to protect against
                                infection by Neisseria gonorrhoeae;
                                        6
<PAGE>   8
 
                             -  a recombinant protein vaccine to protect against
                                infection by Haemophilus influenzae non
                                typeable;
 
                             -  a recombinant protein vaccine to protect against
                                infection by Streptococcus Group B; and
 
                             -  a recombinant protein vaccine to protect against
                                infection by Chlamydia pneumoniae.
 
                             The therapeutic and vaccine products developed
                             according to the terms of the Research and
                             Development Agreement and pursuant to the CliniChem
                             Programs are herein referred to as the "CliniChem
                             Products". Unless BioChem and CliniChem agree
                             otherwise and subject to pre-existing third-party
                             rights and receipt of certain third-party consents,
                             all of the CliniChem Products will be licensed to
                             CliniChem pursuant to the Technology License
                             Agreement. Such license will be limited for each
                             CliniChem Product to a particular Field of Use. See
                             "The Agreements and the Purchase Option--Technology
                             License Agreement."
 
   
                             The Research and Development Agreement provides
                             that CliniChem will fund Research and Development
                             Costs from the date of the declaration of the
                             Dividend. Based on CliniChem's current development
                             schedule, CliniChem does not expect that most of
                             the CliniChem Products will reach commercial
                             marketability prior to expenditure of the Available
                             Funds. See "The Agreements and the Purchase
                             Option--Research and Development Agreement".
    
 
                             Under the BioChem/CliniChem Agreements:
 
                             (i) BioChem will grant CliniChem an exclusive,
                                 worldwide, royalty free license to all BioChem
                                 Technology used in the CliniChem Programs,
                                 except for technology licensed to BioChem under
                                 certain excluded agreements, in return for
                                 which CliniChem will pay BioChem the Technology
                                 Fee;
 
                             (ii) CliniChem will contract with BioChem for
                                  BioChem to perform the research and
                                  development associated with the CliniChem
                                  Programs and CliniChem shall pay all
                                  associated Research and Development Costs;
 
                             (iii) any intellectual property arising from
                                   BioChem's activities under the Research and
                                   Development Agreement will belong to BioChem
                                   but will be included in the license of
                                   BioChem Technology to CliniChem;
 
                             (iv) BioChem will have an option to terminate the
                                  licenses granted to CliniChem on a
                                  product-by-product and country-by-country
                                  basis in return for ongoing royalty payments
                                  to CliniChem;
 
                             (v) BioChem will have the right to buy out the
                                 ongoing royalty payment stream for a one time
                                 cash payment; and
 
                             (vi) BioChem will provide certain administrative
                                  services for CliniChem in return for cash
                                  payments.
 
                             At the time of the capital contribution, BioChem
                             will record an investment in CliniChem of $150
                             million. Under Canadian Generally Accepted
                             Accounting Principles ("GAAP"), BioChem will charge
                             the carrying value of the distribution to retained
                             earnings on the date of the declaration of the
                             Distribution. Under U.S. GAAP, BioChem will charge
                                        7
<PAGE>   9
 
                             the fair market value of the distribution to
                             retained earnings and will expense the excess of
                             the carrying value of its investment in CliniChem
                             Common Shares over the fair market value of these
                             shares. The fair market value of the CliniChem
                             Common Shares will be determined by BioChem based
                             on their closing price on relevant stock exchanges
                             on the Distribution Date. This difference between
                             the Canadian and U.S. GAAP treatment of the
                             Distribution will be disclosed in a reconciling
                             note to BioChem's financial statements. BioChem
                             will recognize as revenue the payments from
                             CliniChem under the Research and Development
                             Agreement and Research and Development Costs
                             incurred by BioChem to perform its obligations
                             under the Research and Development Agreement will
                             be expensed as research and development expenses
                             under Canadian and U.S. GAAP.
 
                             If BioChem exercises its Purchase Option, the
                             purchase price will be allocated between
                             capitalized intangibles (for the value of completed
                             products) and in-process research and development
                             (for the value of research and development
                             programs). Under Canadian GAAP, the value
                             attributed to in-process research and development
                             will be amortized over the period to be benefitted.
                             Under U.S. GAAP, it will be immediately written off
                             as an expense.
 
                             CliniChem is not expected to generate net income
                             for the forseeable future and perhaps not at all.
 
CliniChem Board of
Directors..................  All the current directors of CliniChem are also
                             officers, directors or employees of BioChem.
                             Subsequent to the Distribution, two of the current
                             directors will resign as directors of CliniChem and
                             will be replaced by independent directors. As the
                             holder of the majority of the outstanding Class B
                             Shares, BioChem has the right to elect one
                             director. See "Business of CliniChem--Executive
                             Officers and Directors" and "Description of
                             CliniChem's Share Capital."
 
No Fractional Shares.......  No fractional CliniChem Common Shares will be
                             distributed. Fractional CliniChem Common Shares
                             will be rounded up to a whole share by CliniChem's
                             transfer agent and distribution agent for the
                             Distribution, General Trust of Canada (the
                             "Distribution Agent").
 
Reasons for the
Distribution...............  BioChem believes that the research and development
                             work it has undertaken, directly and through
                             collaborators, in the therapeutic and vaccine areas
                             has yielded results which justify further research
                             and development. However, a substantial amount of
                             additional research and development effort is
                             required to further develop the CliniChem Products
                             to their potential commercialization. Such
                             opportunities involve significantly different
                             risk/reward profiles as compared to BioChem's
                             established therapeutic, vaccine and diagnostic
                             businesses. BioChem believes that the arrangements
                             with CliniChem will significantly benefit BioChem
                             shareholders by:
 
                             -  separating the risks associated with conducting
                                the CliniChem Programs from those associated
                                with BioChem's established therapeutic, vaccine
                                and diagnostic businesses;
 
                             -  allowing individual shareholders of BioChem to
                                increase or decrease their level of
                                participation in the business of conducting the
                                CliniChem Programs by varying their level of
                                investment in CliniChem;
                                        8
<PAGE>   10
 
                             -  obtaining for BioChem the exclusive right to
                                commercialize worldwide (subject to pre-existing
                                third-party rights) any developed CliniChem
                                Product, assuming BioChem's exercise of the
                                Product Option with respect to such product or
                                exercise of the Purchase Option, thereby making
                                it possible for BioChem to capture a potentially
                                greater return on the products developed with
                                CliniChem than would otherwise be possible from
                                products developed for commercialization in
                                conjunction with other third parties; and
 
                             -  allowing BioChem's near-term financial results
                                to continue to reflect principally its
                                established therapeutic, vaccine and diagnostic
                                businesses through CliniChem's payment to
                                BioChem for the Research and Development Costs.
 
                             The foregoing potential benefits to Holders of the
                             arrangements with CliniChem may, however, be offset
                             by certain costs and detriments, including but not
                             limited to the following: BioChem's loss of control
                             over research and development activities to be
                             conducted by or on behalf of CliniChem, which
                             instead will be overseen by CliniChem's Board of
                             Directors; the administrative costs to BioChem
                             relating to the establishment of CliniChem,
                             including accounting and legal fees and costs; the
                             potential cost of the exercise of any of BioChem's
                             options and potential royalties to CliniChem; and
                             the potential loss of income tax benefits to
                             BioChem which may have been derived from deductions
                             by BioChem rather than by CliniChem of research and
                             development expenses attributable to the CliniChem
                             Programs.
 
Technology License
  Agreement................  Pursuant to the Technology License Agreement,
                             BioChem has granted to CliniChem an exclusive
                             perpetual license to use BioChem Technology solely
                             to conduct the CliniChem Programs and related
                             activities, and to manufacture and to commercialize
                             the CliniChem Products worldwide. This license is
                             subject to pre-existing third-party rights, receipt
                             of certain third-party consents, the terms and
                             conditions of the Research and Development
                             Agreement and the Product Option. The license for
                             each CliniChem Product shall be limited to a
                             designated Field of Use. See "The Agreements and
                             the Purchase Option--Technology License Agreement"
                             and "--Third-Party Consents and Rights."
 
   
                             In consideration for the license to use BioChem
                             Technology to conduct the CliniChem Programs,
                             CliniChem will pay a fee (the "Technology Fee") to
                             BioChem. The Technology Fee will be payable monthly
                             at a rate of $352,100 per month over a period of 48
                             months; provided that the Technology Fee will no
                             longer be payable at such time as the number of
                             CliniChem Products being researched or developed by
                             or on behalf of CliniChem, plus the number of
                             CliniChem Products having been acquired by BioChem
                             pursuant to the exercise of the Product Option, is
                             less than two.
    
 
                             Pursuant to the terms of the Technology License
                             Agreement, CliniChem's right to obtain
                             manufacturing will be subject to a right of first
                             offer and a right of first refusal on the part of
                             BioChem to manufacture and, in the event BioChem
                             does not exercise such right of first offer or
                             right of first refusal, then BioChem has the right
                             to approve any proposed manufacturer, which
                             approval may be withheld only if any such
                             manufacturer has insufficient or inadequate
                             manufacturing capabil-
                                        9
<PAGE>   11
 
                             ity (including lack of compliance with Good
                             Manufacturing Practices ("GMP") regulations) or if
                             any such manufacturer's activities are likely to
                             have a material adverse effect on BioChem's overall
                             competitive position in the pharmaceutical
                             industry. In the event that BioChem exercises its
                             right to reject a manufacturer, BioChem will be
                             obligated to manufacture or obtain manufacturing
                             for any such CliniChem Product for CliniChem at
                             prevailing market rates, but not less than
                             BioChem's cost of manufacture plus 15% of such
                             cost.
 
                             Pursuant to the Technology License Agreement,
                             CliniChem shall not have the right to grant a
                             sublicense with respect to the BioChem Technology
                             to anyone other than BioChem until such time as the
                             Product Option with respect to any CliniChem
                             Product in one or more countries expires
                             unexercised. From and after the expiration of such
                             Product Option in any such country, CliniChem may
                             sublicense BioChem Technology to one or more third
                             parties solely to the extent necessary to complete
                             the development of, or to make or have made and use
                             such Clinichem Product, or to sell or have sold
                             such CliniChem Product in such country. BioChem
                             shall have the right to approve any proposed
                             sublicensee or any manufacturer on behalf of a
                             sublicensee but such approval may only be withheld
                             if any such sublicensee or manufacturer has
                             insufficient manufacturing capability (including
                             lack of compliance with GMP regulations) or if any
                             such sublicensee's or manufacturer's activities are
                             likely to have a material adverse effect on
                             BioChem's overall competitive position in the
                             pharmaceutical industry.
 
Research and Development
  Agreement................  CliniChem and BioChem have entered into the
                             Research and Development Agreement pursuant to
                             which BioChem will conduct the CliniChem Programs.
 
                             Until the exercise or the expiration of the
                             Purchase Option, CliniChem is required to utilize
                             the Available Funds only in accordance with the
                             Research and Development Agreement, the Technology
                             License Agreement and the Services Agreement.
                             CliniChem is expected to utilize substantially all
                             of the Available Funds to make payments to BioChem
                             for its Research and Development Costs. Research
                             and Development Costs will be charged in a manner
                             consistent with industry practices, and payments
                             for all reasonable, fully-burdened costs plus 5% of
                             such costs will be recognized by BioChem as
                             contract research and development revenue.
 
                             The Research and Development Agreement provides
                             that CliniChem will fund Research and Development
                             Costs from the date of the declaration of the
                             Distribution. It is anticipated that CliniChem will
                             spend the Available Funds under the Research and
                             Development Agreement over a period of
                             approximately four to five years. Based on
                             CliniChem's current development schedule, CliniChem
                             does not expect that most of the CliniChem Products
                             will reach commercial marketability prior to
                             expenditure of the Available Funds. Currently,
                             other than the Available Funds, CliniChem has no
                             other source for the funding that may be needed to
                             complete the development and commercialization of
                             the CliniChem Products. CliniChem's use of the
                             Available Funds is subject to the terms of the
                             BioChem/CliniChem Agreements. All technology
                             developed or otherwise obtained pursuant to the
                             Research
                                       10
<PAGE>   12
 
                             and Development Agreement ("Developed Technology")
                             will be owned by BioChem and licensed to CliniChem
                             pursuant to the terms of the Technology License
                             Agreement.
 
                             The Research and Development Agreement will
                             terminate upon the exercise or expiration of the
                             Purchase Option, which will expire on the earlier
                             of March 31, 2003 or 90 days after CliniChem
                             provides BioChem with notification that there are
                             less than $5.0 million of Available Funds (unless
                             extended by BioChem but in no event beyond March
                             31, 2003). However, BioChem's obligation to make
                             payments to CliniChem with respect to Acquired
                             Products will continue if the Purchase Option
                             expires unexercised. See "The Agreements and the
                             Purchase Option--Research and Development
                             Agreement."
 
Product Option.............  CliniChem has granted BioChem an option to acquire
                             all rights to each CliniChem Product (the "Product
                             Option"). Upon exercise of the Product Option,
                             BioChem will make Product Payments to CliniChem
                             with respect to each CliniChem Product as to which
                             the Product Option is exercised (an "Acquired
                             Product"). The Product Option for each CliniChem
                             Product is exercisable on a country-by-country
                             basis at any time until (i) with respect to the
                             United States, 30 days after clearance by the
                             United States Food and Drug Administration (the
                             "FDA") to commercially market such CliniChem
                             Product in the United States and (ii) with respect
                             to any other country, 30 days after the clearance
                             by the appropriate regulatory agency to
                             commercially market the CliniChem Product in such
                             country. The Product Option will expire, to the
                             extent not previously exercised, 30 days after the
                             expiration of the Purchase Option. If and to the
                             extent the Product Option is exercised as to any
                             Acquired Product, CliniChem's license to such
                             Acquired Product in the country or countries as to
                             which the Product Option is exercised shall
                             terminate and BioChem shall be subject to the
                             obligation to make Product Payments.
 
Product Payments...........  BioChem will make Product Payments to CliniChem
                             with respect to each Acquired Product. Such
                             payments will be a percentage of Net Sales and
                             Licensing Revenues. Such payments will range from 1
                             to 6% of Net Sales and from 10 to 25% of Licensing
                             Revenues and will be calculated as follows:
 
                             (a) royalties of up to a maximum of 6% of Net Sales
                                 of the Acquired Product determined as follows:
                                 (i) 1% of such Net Sales, plus (ii) an
                                 additional 0.1% of such Net Sales for each full
                                 $1 million of Research and Development Costs of
                                 the Acquired Product paid by CliniChem at the
                                 time BioChem exercised the Product Option with
                                 respect to such Acquired Product; plus
 
                             (b) licensing fees of up to a maximum of 25% of
                                 Licensing Revenues with respect to such
                                 Acquired Product determined as follows: (i) 10%
                                 of such Licensing Revenues, plus (ii) an
                                 additional 1% of such Licensing Revenues for
                                 each full $1 million of Research and
                                 Development Costs of the Acquired Product paid
                                 by CliniChem at the time BioChem exercised the
                                 Product Option with respect to such Acquired
                                 Product.
 
                             Because the marketing expenses associated with
                             newly introduced products during the first few
                             years after launch are generally significantly
                             higher than those for established products, the
                             Product Option provides
                                       11
<PAGE>   13
 
                             that the Product Payments described above will be
                             capped at 3% of Net Sales plus 12.5% of Licensing
                             Revenues, on a quarterly basis, for the first
                             twelve calendar quarters during which the Acquired
                             Product is commercially sold in the first Major
                             Market Country. Subject to BioChem's Product
                             Payment Buy-Out Option described below, Product
                             Payments will be payable, with respect to all
                             countries for which the Product Option has been
                             exercised, until 10 years after the first
                             commercial sale of the Acquired Product in the
                             first Major Market Country in which such product is
                             commercially sold. To the extent BioChem does not
                             exercise the Product Option with respect to any
                             CliniChem Product, CliniChem will retain the rights
                             to research and develop (subject to the terms of
                             the Technology License Agreement and the Research
                             and Development Agreement) and commercialize such
                             CliniChem Product. Until the exercise or the
                             expiration of the Purchase Option, all Product
                             Payments paid to CliniChem as described above will
                             become part of the Available Funds and may be used
                             to pay BioChem for its Research and Development
                             Costs.
 
Product Payment Buy-Out
  Options..................  BioChem has the option to buy out CliniChem's right
                             to receive Product Payments for any Acquired
                             Product on a country-by-country or global basis. A
                             country-by-country buy-out option may be exercised
                             for any Acquired Product in any country at any time
                             after the end of the twelfth calendar quarter
                             following the date on which the Acquired Product
                             was first commercially sold in such country. The
                             buy-out price for an Acquired Product will be 15
                             times the total amount of Product Payments for such
                             Acquired Product made by or due from BioChem to
                             CliniChem with respect to such Acquired Products in
                             such country for the four calendar quarters
                             immediately preceding the quarter in which the
                             buy-out option is exercised. The global buy-out
                             option may be exercised for any Acquired Product,
                             for all countries for which BioChem has exercised
                             the Product Option, at any time after the end of
                             the twelfth calendar quarter following the date on
                             which the Acquired Product was first commercially
                             sold in either the United States or two other Major
                             Market Countries. The buy-out price for a global
                             buy-out shall be calculated as if any previous
                             country-by-country buy-outs had not been made by
                             adding payments which would have been made had the
                             country specific buy-out not occurred to the
                             Product Payments used to calculate the buy-out
                             price, and subtracting from the buy-out price the
                             amounts paid by BioChem to exercise the
                             country-by-country buy-outs. The buy-out price in
                             the case of a global buy-out will be (i) 20 times
                             (a) the Product Payments made by or due from
                             BioChem to CliniChem with respect to the Acquired
                             Product, plus (b) such Product Payments as would
                             have been made by or due from BioChem to CliniChem
                             if BioChem had not exercised any country-specific
                             buy-out option with respect to such Acquired
                             Product, in each case for the four calendar
                             quarters immediately preceding the quarter in which
                             the global buy-out option is exercised, less (ii)
                             any amount previously paid to exercise any
                             country-specific buy-out option with respect to
                             such Acquired Product. In either case, the buy-out
                             price will be computed as if Product Payments were
                             not limited to 3% of Net Sales or 12.5% of
                             Licensing Revenues (as applicable) during early
                             marketing as described above.
                                       12
<PAGE>   14
 
Purchase Option............  BioChem, as the holder of the majority of the
                             outstanding Class B Shares after the Distribution,
                             has the right, provided for in CliniChem's
                             Articles, to acquire all (but not less than all) of
                             the outstanding CliniChem Common Shares (the
                             "Purchase Option"). The Purchase Option will be
                             exercisable by written notice given at any time
                             from and after the Distribution Date and ending on
                             the earlier of (i) March 31, 2003 or (ii) the
                             90(th) day after the date CliniChem provides
                             BioChem (as the holder of the majority of the
                             outstanding Class B Shares) with quarterly
                             financial statements of CliniChem showing cash or
                             cash equivalents of less than $5.0 million,
                             although BioChem may, at its election, extend such
                             period by providing additional funding, including
                             through loans, for the continued conduct of any or
                             all of the CliniChem Programs (but in no event
                             beyond March 31, 2003). If the Purchase Option is
                             exercised, the Purchase Option Exercise Price will
                             be the greatest of:
 
                             (a) (i) 25 times the aggregate of (a) all worldwide
                                 payments made by and all worldwide payments due
                                 to be made by BioChem to CliniChem with respect
                                 to all Acquired Products for the four calendar
                                 quarters immediately preceding the quarter in
                                 which the Purchase Option is exercised (the
                                 "Base Period") and (b) all payments that would
                                 have been made and all payments due to be made
                                 by BioChem to CliniChem during the Base Period
                                 if BioChem had not previously exercised its
                                 Product Payment Buy-Out Option with respect to
                                 any CliniChem Product; less (ii) any amounts
                                 previously paid to exercise any Product Payment
                                 Buy-Out Option for any CliniChem Product;
 
                             (b) the fair market value of 420,000 BioChem Common
                                 Shares;
 
                             (c) $175 million plus any additional funds
                                 contributed to CliniChem by BioChem, less the
                                 aggregate amount of all Technology Fee
                                 payments, Research and Development Costs and
                                 Services Agreement payments paid or incurred by
                                 CliniChem as of the date the Purchase Option is
                                 exercised; and
 
                             (d) $50 million.
 
                             In each case, the amount payable as the Purchase
                             Option Exercise Price will be reduced (but not to
                             less than $1.00) to the extent, if any, that
                             CliniChem's liabilities at the time of exercise
                             (other than liabilities under the Research and
                             Development Agreement, the Services Agreement and
                             the Technology License Agreement and any debt owed
                             to BioChem) exceed CliniChem's cash and cash
                             equivalents, and short-term and long-term
                             investments (excluding the amount of Available
                             Funds remaining at such time). BioChem may pay the
                             Purchase Option Exercise Price in cash, in BioChem
                             Common Shares or in any combination of cash and
                             BioChem Common Shares. The per share Purchase Price
                             of CliniChem Common Shares will be affected if
                             CliniChem issues additional CliniChem Common Shares
                             after the Distribution.
 
                             Under the Articles and the by-laws of CliniChem
                             (the "By-laws"), CliniChem is prohibited from
                             taking or permitting any action inconsistent with,
                             or which would in any way alter, BioChem's rights
                             under the Purchase Option. In addition, until the
                             expiration of the Purchase Option, CliniChem may
                             not, without the consent of BioChem as the sole
                             holder of the majority of the outstanding Class B
                             Shares, amalgamate or
                                       13
<PAGE>   15
 
                             liquidate, amend its Articles to alter the Purchase
                             Option, CliniChem's authorized capitalization, or
                             certain provisions of its Articles governing the
                             right of the holders of the majority of the
                             outstanding Class B Shares to elect one director.
 
   
                             To the extent Rule 13e-3 ("Rule 13e-3") under the
                             Exchange Act dealing with going private
                             transactions by certain issuers or their affiliates
                             is applicable at the time of any exercise of the
                             Purchase Option, BioChem and CliniChem will comply
                             with their respective obligations under Rule 13e-3,
                             subject to any available exemptions from such
                             obligations.
    
 
Income Tax
Considerations.............  The Distribution will be a taxable dividend to
                             Holders who are resident in Canada. The normal
                             rules concerning the taxation of dividends paid by
                             a taxable Canadian corporation to its shareholders
                             will be applicable. A Holder who is not resident in
                             Canada and receives CliniChem Common Shares as a
                             dividend-in-kind will be subject to Canadian
                             withholding tax. A portion of the CliniChem Common
                             Shares otherwise deliverable to a non-resident
                             Holder will be sold on behalf of the non-resident
                             in order to pay any Canadian withholding tax for
                             which such non-resident is otherwise liable. In the
                             case of a U.S. Holder (as defined below), pursuant
                             to the Canada-United States Income Tax Convention,
                             the rate of withholding is generally 15%. In the
                             case of U.S. Holders who hold their BioChem Common
                             Shares through DTC, DTC will debit the
                             broker-dealer's account for the amount of cash
                             equal to 15% of the fair market value of the
                             dividended shares and remit such amount to Revenue
                             Canada. The broker-dealer will then debit the
                             account of such Holder for a like amount. However,
                             in the case of U.S. Holders who are registered
                             holders (as opposed to beneficial owners who hold
                             their shares through a depositary) ("Registered
                             U.S. Holders"), BioChem needs to withhold 15% of
                             the fair market value of the shares distributed to
                             such Holders and remit the proceeds from the sale
                             of such shares to Revenue Canada. Less than 1% of
                             BioChem's Common Shares held by non-resident
                             Holders are held by Registered U.S. Holders.
 
                             Accordingly, BioChem (or its transfer agent) will
                             be making such sales on behalf of Registered U.S.
                             Holders from whom shares have been withheld. Such
                             sales of CliniChem Common Shares will be effected
                             following the Distribution pursuant to Regulation S
                             under the Securities Act in one or more offshore
                             transactions, including open-market transactions on
                             a Canadian stock exchange, which are not subject to
                             the registration requirements of the Securities Act
                             and applicable state securities laws. BioChem
                             expects that such shares will be sold in market
                             transactions on either the Montreal Exchange or The
                             Toronto Stock Exchange in an orderly fashion during
                             the first few weeks following commencement in
                             trading of the CliniChem Common Shares or in one or
                             more private transactions. See "Income Tax
                             Considerations--Canadian Federal Income tax
                             Considerations" and "The Distribution".
 
                             The Distribution of CliniChem Common Shares to a
                             U.S. Holder will be treated as a dividend for
                             United States Federal income tax purposes to the
                             extent of BioChem's current and accumulated
                             earnings and profits (as determined for United
                             States tax purposes). Any excess of the value of
                             the CliniChem Common Shares distributed over
                             BioChem's current and accumulated earnings and
                             profits will be treated first as a return of
                                       14
<PAGE>   16
 
                             a U.S. Holder's tax basis in its BioChem Common
                             Shares, and then (once such basis is reduced to
                             zero) as a capital gain. For these purposes, a U.S.
                             Holder will be considered to have received a
                             distribution equal to the aggregate fair market
                             value on the date of the Distribution of the
                             CliniChem Common Shares actually received by such
                             U.S. Holder plus those shares which are withheld to
                             satisfy such U.S. Holder's Canadian withholding tax
                             liability. BioChem believes that it does not have
                             any accumulated earnings and profits, but cannot
                             determine whether it has current earnings and
                             profits until the close of its 1998 tax year.
                             BioChem will notify the relevant depository agents
                             of any amount which must be included in the income
                             of the U.S. Holders as a dividend.
 
                             A. U.S. Holder will not be entitled to claim a
                             dividends-received deduction with respect to the
                             CliniChem Common Shares received in the
                             Distribution, or on dividends, if any, that
                             CliniChem pays on CliniChem Common Shares.
 
                             It is expected that CliniChem will initially be
                             classified as a "passive foreign investment
                             company" ("PFIC") for United States Federal income
                             tax purposes. If CliniChem is so classified, a U.S.
                             Holder of CliniChem Common Shares will be subject
                             to a special United States tax regime with respect
                             to certain distributions received from CliniChem as
                             well as with respect to any gain from the
                             disposition of CliniChem Common Shares, unless such
                             U.S. Holder elects to include currently in gross
                             income a pro rata share of the earnings of
                             CliniChem each year (a "qualified election").
                             Failure to make such qualified election could be
                             disadvantageous to certain United States investors.
                             Therefore, prospective investors who are United
                             States corporations, United States citizens or
                             residents, or otherwise subject to the United
                             States tax jurisdiction should consult their tax
                             advisors to decide whether to make a qualified
                             election with respect to their CliniChem Common
                             Shares. See "Income Tax Considerations--United
                             States Federal Income Tax Considerations."
 
                             The status of CliniChem as a foreign corporation
                             may pose special tax risks to United States
                             investors. Certain material United States Federal
                             income tax consequences of the Distribution and
                             receipt of CliniChem Common Shares are discussed
                             under "Income Tax Considerations--United States
                             Federal Income Tax Considerations."
 
                             A Registered U.S. Holder will be subject to
                             Canadian withholding tax on the Distribution, and
                             will have a portion of the CliniChem Common Shares
                             otherwise deliverable to it withheld from the
                             Distribution by the Distribution Agent, in order
                             for some or all of such withheld shares to be sold
                             and the proceeds used to satisfy Canadian
                             withholding tax for which such U.S. Holder is
                             liable. After sufficient shares are sold to satisfy
                             such liability, any remaining withheld shares which
                             have not been so sold will be distributed to such
                             U.S. Holder. Such U.S. Holder will recognize a
                             short-term capital gain or loss on the sale of such
                             withheld shares equal to the difference between the
                             sale price realized and the sum of the fair value
                             of the shares on the Distribution Date plus any
                             expenses incurred in relation to the sale. See
                             "Income Tax Considerations" and "The Distribution."
                                       15
<PAGE>   17
 
                             HOLDERS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS
                             WITH RESPECT TO THE SPECIFIC TAX CONSEQUENCES OF
                             THE DISTRIBUTION AND THE OWNERSHIP AND DISPOSITION
                             OF CLINICHEM COMMON SHARES GIVEN THEIR PARTICULAR
                             STATUS AND CIRCUMSTANCES.
 
Risk Factors...............  Ownership of CliniChem Common Shares involves a
                             high degree of investment risk which should be
                             considered carefully in evaluating the ownership of
                             CliniChem Common Shares including:
 
                             (i)      No prior operating history; no assurance
                                      of profitability;
                             (ii)      common management;
 
                             (iii)     lack of arm's-length negotiations;
 
                             (iv)     exercise of the Product Option will give
                                      BioChem sole control of a product;
 
                             (v)      the Purchase Option Exercise Price may not
                                      reflect the fair market value of the
                                      CliniChem Common Shares;
 
                             (vi)     no assurance of exercise of options;
 
                             (vii)     no assurance of successful development of
                                       the CliniChem Products;
 
                             (viii)    no assurance of sufficient funds;
 
                             (ix)     no assurance of successful manufacturing
                                      or marketing;
 
                             (x)      failure to obtain third-party consents may
                                      prevent the marketing of certain CliniChem
                                      Products;
 
                             (xi)     potential competition from BioChem;
 
                             (xii)    relationship between CliniChem and BioChem
                                      may limit CliniChem's activities and
                                      market value;
 
                             (xiii)    directors not initially elected by
                                       shareholders;
 
                             (xiv)    limitation on CliniChem's ability to
                                      license products to third parties;
 
                             (xv)     uncertainty regarding sufficient
                                      availability of BioChem research and
                                      development personnel and facilities;
 
                             (xvi)    limitation or termination of rights and
                                      obligations in bankruptcy;
 
   
                             (xvii)   dependence on BioChem;
    
 
   
    
   
                             (xviii)   highly competitive industry; rapid and
                                       significant technological change;
    
 
   
                             (xix)    government regulation;
    
 
   
                             (xx)     uncertainty regarding patents and
                                      proprietary technology; unpredictability
                                      of patent protection;
    
 
   
                             (xxi)    uncertainty of pharmaceutical pricing and
                                      third-party reimbursement;
    
 
   
                             (xxii)  product liability exposure and insurance;
    
 
   
                             (xxiii)   possible dilution; reduction of per share
                                       Purchase Option Exercise Price;
    
 
   
                             (xxiv)   no assurance of trading value or markets
                                      for CliniChem Common Shares;
    
                                       16
<PAGE>   18
 
   
                             (xxv)   development of new products; market
                                     acceptance of new products;
    
 
   
                             (xxvi)   risks associated with the
                                      commercialization of 3TC and lamivudine;
    
 
   
                             (xxvii)  reliance on Glaxo Wellcome and other
                                      collaborative relationships;
    
 
   
                             (xxviii) uncertainties of financial results;
    
 
   
                             (xxix)   volatility of the price of the common
                                      share of BioChem;
    
 
   
                             (xxx)   shares eligible for future sale;
    
 
   
                             (xxxi)   absence of dividends;
    
 
   
                             (xxxii)  international operation; currency
                                      fluctuations; and
    
 
   
                             (xxxiii) shareholder rights plan (anti-takeover
                                      protection). See "Risk Factors."
    
 
Principal Offices..........  CliniChem's registered and principal executive
                             office is located at 275 Armand-Frappier Boulevard,
                             Laval, Quebec, Canada H7V 4A7.
 
Reasons for Furnishing this
  Prospectus...............  This Prospectus is being furnished solely to
                             provide information for Holders, each of whom will
                             receive CliniChem Common Shares in the
                             Distribution. It is not to be construed as an
                             inducement or encouragement to buy or sell any
                             securities of CliniChem or BioChem. The information
                             contained herein is provided as of the date of this
                             Prospectus unless otherwise indicated.
                                       17
<PAGE>   19
 
                                    GLOSSARY
 
Acquired Product...........  A CliniChem Product as to which the Product Option
                             has been exercised by BioChem.
 
Available Funds............  All of the funds contributed to CliniChem by
                             BioChem, plus any investment income earned thereon,
                             less (i) Research and Development Costs, (ii)
                             CliniChem's ongoing administrative expenses and
                             income taxes paid (less income taxes refunded),
                             (iii) the Technology Fee, (iv) payments made
                             pursuant to the Services Agreement and (v)
                             reasonable amounts actually paid by CliniChem for
                             consultants to advise the Board of Directors of
                             CliniChem with respect to the CliniChem Products
                             and the CliniChem Programs. Available Funds shall
                             not include payments made by BioChem to CliniChem
                             pursuant to the Product Option Agreement.
 
BioChem/CliniChem
  Agreements...............  The Research and Development Agreement, the
                             Technology License Agreement, the Product Option
                             Agreement, the Services Agreement, the Distribution
                             Agreement and the Purchase Option, collectively.
 
BioChem Technology.........  All proprietary technology, whether patented or
                             unpatented, owned by, licensed to or controlled by
                             BioChem and related to the CliniChem Programs,
                             including any Developed Technology, which BioChem
                             has the right to license or sublicense without the
                             consent of any third party and without incurring
                             additional liability to any third party, and any
                             additional technology which BioChem chooses to
                             designate as BioChem Technology.
 
Developed Technology.......  All technology developed or otherwise obtained
                             pursuant to the Research and Development Agreement.
 
Distribution...............  BioChem's distribution of all the outstanding
                             CliniChem Common Shares to the Holders.
 
Distribution Agreement.....  The agreement between BioChem and CliniChem
                             relating to the terms and conditions of the
                             Distribution.
 
Distribution Date..........                      , 1998, the date of
                             commencement of the Distribution.
 
Field of Use...............  The treatment of a particular disease or, in the
                             case of a vaccine, vaccination against a particular
                             bacterium.
 
Holders....................  The holders of record, on the Record Date, of
                             BioChem Common Shares.
 
Licensing Revenues.........  Percentage-of-sales payments and Special Royalty
                             Payments received by BioChem from unrelated third
                             parties with respect to Acquired Products.
 
Major Market Country.......  Any one of the following countries: Canada, France,
                             Germany, Italy, Japan, the United Kingdom or the
                             United States.
 
Net Sales..................  The total amount invoiced, net of taxes, on sales
                             of an Acquired Product by BioChem to unrelated
                             third parties, such as wholesalers, hospitals
                             distributors, marketing partners and others, in
                             bona fide arm's-length transactions, less
                             discounts, allowances, credits and charges for
                             freight or insurance as customarily determined
                             under BioChem's accounting policies.
 
                                       18
<PAGE>   20
 
Product Option.............  The option granted by CliniChem to BioChem to
                             acquire all rights to each CliniChem Product (and
                             to terminate CliniChem's corresponding license with
                             respect thereto), exercisable on a
                             product-by-product and country-by-country basis and
                             freely assignable by BioChem.
 
Product Option Agreement...  The agreement between BioChem and CliniChem
                             granting the Product Option.
 
Product Payment Buy-Out
  Option...................  BioChem's option to buy out CliniChem's right to
                             receive Product Payments for any Acquired Product
                             on a country-by-country or global basis.
 
Product Payments...........  Payments to be made by BioChem to CliniChem with
                             respect to Net Sales of Acquired Products and
                             Licensing Revenues with respect to Acquired
                             Products.
 
Purchase Option............  The option of BioChem (as the holder of the
                             majority of the outstanding Class B Shares) to
                             acquire all (but not less than all) of the
                             outstanding CliniChem Common Shares.
 
Purchase Option Exercise
  Price....................  The amount payable by BioChem to exercise the
                             Purchase Option.
 
Record Date................                      , 1998, the date as of which
                             Holders will be eligible to receive CliniChem
                             Common Shares in the Distribution.
 
Research and Development
  Agreement................  The agreement between BioChem and CliniChem
                             providing for the conduct by BioChem of the
                             CliniChem Programs.
 
Research and Development
  Costs....................  The fully-burdened cost of activities undertaken
                             pursuant to the Research and Development Agreement
                             plus 5% of such costs, including research expenses,
                             general and administrative expenses, capital asset
                             costs, costs for licenses or acquisition of
                             technology, products or therapeutic agents from
                             third parties for the CliniChem Programs and costs
                             of third-party collaborations or contract research
                             undertaken for the CliniChem Programs.
 
Services Agreement.........  The agreement between BioChem and CliniChem
                             pursuant to which BioChem has agreed to provide
                             CliniChem with administrative services.
 
Specialty Royalty
Payments...................  Front-end distribution fees, prepaid royalties,
                             one-time, infrequent or special payments or
                             non-monetary consideration (including licenses of
                             technology) from a licensee, distributor or
                             marketing partner to BioChem with respect to an
                             Acquired Product but excluding any payments for
                             research and development related services or
                             capital expenditures. The fair market value of any
                             such non-monetary consideration shall be assessed
                             by a third-party expert mutually agreed to by
                             BioChem and CliniChem.
 
Technology Fee.............  The payments to be made by CliniChem to BioChem in
                             consideration for BioChem granting CliniChem a
                             license to use existing BioChem Technology for the
                             CliniChem Programs.
 
Technology License
Agreement..................  The agreement between BioChem and CliniChem
                             pursuant to which BioChem has granted to CliniChem
                             a license to use BioChem Technology solely to
                             conduct research and development and related
                             activities with respect to the CliniChem Programs,
                             and a license to commercialize the CliniChem
                             Products, in consideration for the Technology Fee.
                                       19
<PAGE>   21
 
                                  RISK FACTORS
 
     The following factors, in addition to the other information set forth in
this Prospectus should be considered carefully in evaluating ownership of
CliniChem Common Shares:
 
BUSINESS RISKS RELATED TO CLINICHEM
 
     No Prior Operating History; No Assurance of Profitability.  CliniChem is a
newly formed company and is subject to the risks inherent in the establishment
of a new business enterprise in the biotechnology industry. CliniChem will incur
substantial losses for several years due to the long-term nature of the research
and development of the CliniChem Products, which losses may never be recovered.
Further, there can be no assurance that the CliniChem Products being developed
pursuant to the Research and Development Agreement can be licensed or marketed
profitably, if at all. Even if such CliniChem Products are commercialized
profitably, the initial losses may never be recovered. See "Business of
CliniChem."
 
     Common Management.  The BioChem/CliniChem Agreements, the By-laws and the
Articles were approved by BioChem, as the sole shareholder of CliniChem. The
members of the present Board of Directors of CliniChem are persons who are
directors, officers or employees of BioChem or its affiliates. See "Business of
CliniChem--Executive Officers and Directors."
 
     Lack of Arm's-Length Negotiations.  The BioChem/CliniChem Agreements were
not negotiated on an arm's-length basis and BioChem and CliniChem did not retain
separate counsel in connection therewith. BioChem is the contractor under the
Research and Development Agreement and will perform or participate in all
development activities thereunder. CliniChem will be responsible for and will
pay the Research and Development Costs that are incurred by BioChem under the
Research and Development Agreement. BioChem will unilaterally determine certain
activities to be undertaken under the Research and Development Agreement and in
all events BioChem will have substantial influence over all activities and
procedures (including the timing and priorities thereof) to be undertaken
pursuant to the Research and Development Agreement as BioChem will have full
discretion to determine, from time to time, the resources of BioChem
(facilities, equipment and personnel) to be made available for activities under
the CliniChem Programs and to determine, from time to time, the allocation of
these resources among such activities. BioChem has no obligation to complete any
development activity after all the Available Funds have been expended under the
Research and Development Agreement. BioChem's own projects and other third-party
projects may compete for time and resources with projects undertaken pursuant to
the Research and Development Agreement and the resources BioChem expends under
the Research and Development Agreement may therefore be limited. See "The
Agreements and the Purchase Option--Research and Development Agreement."
 
     Exercise of the Product Option will give BioChem sole control of a
product.  If BioChem exercises the Product Option for one or more CliniChem
Products, it will have sole discretion to control the commercialization of such
CliniChem Product(s), including discretion to allocate its marketing resources
among those CliniChem Product(s) and other BioChem products. See "The Agreements
and the Purchase Option--Technology License Agreement."
 
     The Purchase Option Exercise Price may not reflect fair market value;
Transferability of Class B Shares. The Purchase Option Exercise Price was not
determined on an arm's-length basis. There can be no assurance that the Purchase
Option Exercise Price will accurately reflect the fair market value of the
CliniChem Common Shares at the time of exercise, if any, and that the Purchase
Option Exercise Price will not be significantly higher or lower than such fair
market value. The Purchase Option Exercise Price was determined by BioChem,
giving consideration to the structure of the Distribution, CliniChem's planned
business, the BioChem/CliniChem Agreements, advice given by Merrill Lynch,
Pierce, Fenner & Smith Incorporated ("Merrill Lynch") and such other factors as
BioChem deemed appropriate. Furthermore, BioChem may transfer ownership of all
or part of the Class B Shares at any time and there can be no assurance that the
new holder would have the same financial resources or development, manufacturing
or marketing capabilities as BioChem, which may have a material adverse effect
on the likelihood of the exercise of the Purchase Option. In the event that a
majority of the Class B Shares were to be transferred, the payment by the
subsequent holder of the majority of the Class B Shares could be made in cash
or, if such holder is a company whose
 
                                       20
<PAGE>   22
 
common equity securities are listed on a national securities exchange in the
United States, admitted to unlisted trading privileges or listed on the Nasdaq,
or whose common equity securities are listed on The Toronto Stock Exchange or
the Montreal Exchange, in the sole discretion of such holder, in shares of such
listed common equity security. See "The Agreements and the Purchase
Option--Purchase Option."
 
     No Assurance of Exercise of Options.  BioChem is not obligated to exercise
the Purchase Option or the Product Option, and it will exercise either or both
of such options only if, in the opinion of BioChem, it is in BioChem's best
interest to do so. Even if the CliniChem Products are developed and approved, if
BioChem does not exercise the Product Option for a CliniChem Product and/or does
not exercise the Purchase Option, CliniChem will be required to find alternative
ways to commercially market or exploit such CliniChem Products and there can be
no assurance that CliniChem will be able to do so. In the event BioChem fails to
exercise the Purchase Option and CliniChem determines to market the CliniChem
Products itself (other than any CliniChem Product as to which BioChem has
exercised the Product Option), CliniChem will require substantial additional
funds. There can be no assurance that such funds will be available on attractive
terms, if at all. Similarly, if CliniChem determines to license the CliniChem
Products to third parties, such arrangements, if available, may be on terms less
favorable to CliniChem or its shareholders than would be the exercise of the
Purchase Option. See "The Agreements and the Purchase Option--Purchase Option."
 
     No Assurance of Successful Development of the CliniChem
Products.  CliniChem has agreed with BioChem that BioChem will use diligent
efforts to conduct the CliniChem Programs in accordance with the terms of the
Research and Development Agreement. BioChem's historical performance has no
relationship to CliniChem's potential product development and is not indicative
of the future performance of CliniChem. While certain research and development
of the CliniChem Products have been conducted, additional research, clinical
studies and product development are still to be undertaken. There can be no
assurance that CliniChem or BioChem will be able to complete research, clinical
development or product development, gain regulatory approval or successfully
commercialize any of the CliniChem Products or that the CliniChem Products can
be introduced within the anticipated cost estimates or time frames, if at all.
Based on CliniChem's current development schedule, CliniChem does not expect
that most of the CliniChem Products will reach commercial marketability prior to
expenditure of the Available Funds. The successful development of any of the
CliniChem Products will require, among other things, demonstration through human
clinical studies that such CliniChem Products are safe and effective. See "The
Agreements and the Purchase Option--Research and Development Agreement."
 
     No Assurance of Sufficient Funds.  There can be no assurance that CliniChem
will have sufficient funds to successfully develop any of the CliniChem
Products. Based on CliniChem's current development schedule, CliniChem does not
expect that most of the CliniChem Products will reach commercial marketability
prior to expenditure of all of the Available Funds. Currently, other than the
Available Funds, CliniChem has no other source for the funding that may be
needed to complete the development and commercialization of the CliniChem
Products. Therefore, if additional funding is necessary, such development and
commercialization of the CliniChem Products may not be possible. While BioChem
may provide additional funding, including through loans, at its absolute
discretion, upon terms to be negotiated at such time, BioChem is under no
obligation to provide such additional funds and there can be no assurance that
it will provide such additional funds. See "The Agreements and the Purchase
Option--Purchase Option."
 
     No Assurance of Successful Manufacturing or Marketing.  CliniChem has no
manufacturing or marketing capability. BioChem has vaccine manufacturing,
quality control and warehousing operations in two locations in Canada, including
its new facility in Ste-Foy in the Quebec City area. BioChem has marketing
operations for its vaccines in Canada, Argentina and Spain. BioChem has no
manufacturing facilities for commercial production of any of its therapeutic
drugs approved or under development. Even if the CliniChem Products are
developed and receive necessary regulatory clearances and approvals, there can
be no assurance that the CliniChem Products will be successfully manufactured
for clinical trials or successfully manufactured or marketed for commercial
sale. To be successfully marketed, any CliniChem Product must be manufactured in
commercial quantities in compliance with regulatory requirements and at a
commercially viable cost. There can be no assurance that any CliniChem Product
can be manufactured at a commercially viable cost. Any significant delays in the
completion of validation and licensing of expanded or new facilities could have
 
                                       21
<PAGE>   23
 
a material adverse effect on the ability to continue clinical trials of and
ultimately to market the CliniChem Products on a timely and profitable basis. If
BioChem does not exercise its Product Option for a CliniChem Product (and does
not exercise the Purchase Option), CliniChem will have to make alternative
arrangements for manufacturing and marketing that CliniChem Product, and there
can be no assurance that CliniChem will be able to do so.
 
     If BioChem exercises its Product Option for any CliniChem Product, BioChem
may need to develop and/or expand its marketing capabilities to commercialize
such Acquired Product effectively. If BioChem exercises its Product Option for
any CliniChem Product, and does not, at the time the product is to be
commercialized, have a sales force in the relevant country or countries, BioChem
may need to arrange for marketing by third parties. If BioChem does not exercise
its Product Option for a CliniChem Product (and does not exercise the Purchase
Option), CliniChem may need to find other means to commercialize that CliniChem
Product not involving BioChem, and there can be no assurance that CliniChem will
be able to do so.
 
     At the present time, CliniChem does not have, nor, through the development
stage of the CliniChem Products, does it expect to develop, any manufacturing or
marketing capability. If CliniChem decides to manufacture or market one or more
CliniChem Products itself, CliniChem will need substantial additional funds.
There is no assurance that additional funds will be available, or will be
available on attractive terms, and BioChem has no obligation to supply any
additional funds to CliniChem. In addition, prior to the exercise or expiration
of the Purchase Option, CliniChem may not use the Available Funds for this
purpose without BioChem's consent.
 
     If either BioChem or CliniChem seeks a third party to manufacture or market
a CliniChem Product, there can be no assurance that satisfactory arrangements
can be successfully negotiated or that any such arrangements will be on
commercial terms acceptable to BioChem or CliniChem. In addition, even if
CliniChem decides to license any CliniChem Product to a third party, agreements
with that third party, if available, may be on terms less favorable to CliniChem
than the terms of the BioChem/CliniChem Agreements.
 
     Even if acceptable manufacturing and marketing resources are available,
there can be no assurance that any CliniChem Products will be accepted in the
marketplace. There can be no assurance that there will be adequate reimbursement
by health insurance companies or other third-party payors for any CliniChem
Products that are marketed.
 
     CliniChem's right to obtain manufacturing will be subject to a right of
first offer and a right of first refusal on the part of BioChem to manufacture
and, in the event BioChem does not exercise such right of first offer or right
of first refusal, then BioChem has the right to approve any proposed
manufacturer, which approval may be withheld only if any such manufacturer has
insufficient or inadequate manufacturing capability (including lack of
compliance with GMP regulations) or if any such manufacturer's activities are
likely to have a material adverse effect on BioChem's overall competitive
position in the pharmaceutical industry. There can be no assurance that BioChem
will not object to potential manufacturers on such grounds or that such
objection will not have an adverse effect on CliniChem's ability to secure
satisfactory manufacturing arrangements. See "The Agreements and the Purchase
Option--Technology License Agreement."
 
     Failure to obtain certain Third-Party Consents may prevent the marketing of
certain CliniChem Products. Under certain pre-existing agreements, BioChem may
be required to obtain third-party consents in order to grant a sublicense to
CliniChem in accordance with the Technology License Agreement.
 
     BioChem has licensed certain patents and technology related to adjuvants
and biovectors from Pharmadigm Biosciences Inc. ("Pharmadigm") and Biovector
Therapeutics, SA ("Biovector") (respectively the "Pharmadigm Agreement" and the
"Biovector Agreement"). BioChem is currently evaluating the potential of these
adjuvants and biovectors for incorporation into vaccines currently under
development in the CliniChem Programs. In the event that (i) any such developed
vaccine incorporates such adjuvants or biovectors, (ii) BioChem does not
exercise the worldwide Product Option with respect to such vaccine and (iii)
BioChem has not exercised the Purchase Option, it may be necessary for BioChem
to obtain the consent of Pharmadigm and/or Biovector to sublicense such
adjuvants or biovectors to CliniChem on commercial
 
                                       22
<PAGE>   24
 
terms acceptable to BioChem or for CliniChem to obtain a license to such patents
and technology prior to CliniChem's commercialization of such vaccines. There
can be no assurance that BioChem or CliniChem would be able to obtain such
consent or license or, if available, that it would be available on commercial
terms acceptable to BioChem or CliniChem.
 
     BioChem has obtained a license from the University of Georgia Research
Foundation, Inc. ("UGARF") and Yale University (the "UGARF Agreement") to
certain patents and know-how related to the use of BCH-4556 for the treatment of
cancer. The UGARF Agreement is silent as to whether BioChem may grant
sublicenses to commercialize without the licensors' consent. In the event that
BioChem does not exercise the Product Option with respect to BCH-4556 and does
not exercise the Purchase Option, it may be necessary for BioChem to obtain the
consent of the licensors to sublicense such patents and know-how to CliniChem or
for CliniChem to obtain a license to such patents and know-how prior to
CliniChem's commercialization of BCH-4556. There can be no assurance that such
consent or license would be available, or if available, that it would be
available on commercial terms acceptable to BioChem or CliniChem. See "The
Agreements and the Purchase Option--Third-Party Consents and Rights."
 
     Potential Competition from BioChem.  BioChem is engaged in ongoing
licensing and development of new products. While BioChem has licensed the rights
to conduct the CliniChem Programs and manufacture and commercialize the
CliniChem Products to CliniChem, BioChem is not prohibited from developing other
products, including those that may compete with the CliniChem Products, or from
in-licensing or acquiring products that may compete with the CliniChem Products.
BioChem's activities may, in some circumstances, lead to the development,
in-licensing or acquisition of products that compete with the CliniChem Products
being developed by or on behalf of CliniChem. It is possible that BioChem's
rights with respect to such competitive products could reduce BioChem's
incentive to exercise the Product Option or the Purchase Option. See "The
Agreements and the Purchase Option--Research and Development Agreement."
 
     Relationship Between CliniChem and BioChem May Limit CliniChem's Activities
and Market Value. The terms of the BioChem/CliniChem Agreements, the Articles
and the By-laws were not determined on an arm's-length basis and certain terms
may limit CliniChem's activities and its market value.
 
     The Articles and the By-laws prohibit CliniChem from taking or permitting
any action that might impair BioChem's rights under the Purchase Option. Prior
to the exercise or the expiration of the Purchase Option, CliniChem may not,
without the consent of the holders of the majority of the outstanding Class B
Shares, amalgamate or liquidate, or amend its Articles to alter the Purchase
Option, CliniChem's authorized capitalization, or the provisions of the Articles
governing the right of the holders of the majority of the outstanding Class B
Shares to elect one director. Because BioChem will hold all of the outstanding
Class B Shares following the Distribution, BioChem will be able to influence
significantly or control the outcome of any of the foregoing actions requiring
approval by the majority holders of the Class B Shares. The ability of BioChem
to influence significantly or control such matters could affect the liquidity of
the CliniChem Common Shares and have an adverse effect on the price of the
CliniChem Common Shares, and may have the effect of delaying or preventing a
change in control of CliniChem, including transactions in which shareholders
might otherwise receive a premium for their shares over then current market
prices. Neither the terms of the BioChem/CliniChem Agreements nor the Articles
prohibit BioChem from transferring its Class B Shares. The special rights
accorded to the holders of the majority of the outstanding Class B Shares will
expire upon expiration of the Purchase Option. See "The Agreements and The
Purchase Option--Purchase Option" and "Description of CliniChem's Share
Capital."
 
     So long as the Purchase Option is exercisable, the market value of the
CliniChem Common Shares will be limited by the Purchase Option Exercise Price.
The Purchase Option Exercise Price was determined by BioChem, giving
consideration to the structure of the Distribution, CliniChem's planned
business, the BioChem/CliniChem Agreements, advice given by Merrill Lynch, and
such other factors as BioChem deemed appropriate. The Purchase Option Exercise
Price was not determined on an arm's-length basis.
 
     The existence of the Purchase Option and BioChem's rights as holder of the
majority of the outstanding Class B Shares may inhibit CliniChem's ability to
raise capital. Additional capital raised by CliniChem, if any, would most likely
reduce the per share proceeds available to holders of the CliniChem Common
Shares if the Purchase Option were exercised. The existence of the Purchase
Option and BioChem's rights as the holder of
                                       23
<PAGE>   25
 
the majority of the outstanding Class B Shares may inhibit a change of control
and may make an investment in the CliniChem Common Shares less attractive to
certain potential shareholders, which could adversely affect the liquidity and
market value of the CliniChem Common Shares.
 
     If BioChem exercises its Product Option for any CliniChem Products, BioChem
will have the right to commercialize the product with third parties on such
terms as BioChem deems appropriate. In such event, Product Payments from BioChem
to CliniChem with respect to the CliniChem Product commercialized by such third
parties will be based on Licensing Revenues received from such third parties.
 
     Directors Not Initially Elected by Shareholders.  Dr. Francesco Bellini
will remain a director of CliniChem following the Distribution in accordance
with the rights of BioChem under the Articles as the sole holder of the majority
of the outstanding Class B Shares. Subsequent to the Distribution, two of
CliniChem's current directors will resign as directors and will be replaced by
independent directors. The directors will not have been elected by the
shareholders, and the holders of the CliniChem Common Shares will not have the
opportunity to elect any members of the full Board of Directors until the first
annual meeting of shareholders following the Distribution. See "Business of
CliniChem--Executive Officers and Directors".
 
     Limitation on CliniChem's Ability to License Products to Third
Parties.  CliniChem has granted BioChem the Product Option, which is exercisable
on a product-by-product and country-by-country basis. During the term of the
Product Option for each CliniChem Product, CliniChem will not be able to
sublicense such CliniChem Product to any party other than BioChem. See "The
Agreements and the Purchaser Option--Product Option Agreement."
 
     Uncertainty Regarding Sufficient Availability of BioChem Research and
Development Personnel and Facilities.  Although BioChem believes that its
personnel, facilities and third-party arrangements currently are or, in the
future, will be adequate for the performance of its duties to CliniChem under
the Research and Development Agreement, its research personnel will perform
services in the same facilities for BioChem and client companies of BioChem. In
addition, conduct of the CliniChem Programs pursuant to the Research and
Development Agreement will require BioChem to attract and retain additional
personnel with particular scientific and management skills. The availability of
such personnel is limited and there can be no assurance that such personnel will
be available or that BioChem will be successful in attracting the necessary
personnel to successfully develop any of the CliniChem Products. BioChem is not
required to allocate any specified amount of time or resources to its duties
under the Research and Development Agreement. BioChem's obligations to other
present and future clients may restrict the amount of resources that otherwise
could be devoted to its duties under the Research and Development Agreement.
Subject to its obligation to use diligent efforts under the Research and
Development Agreement, BioChem may allocate both its research personnel and its
facilities as it deems appropriate under the circumstances. See "The Agreements
and the Purchase Option--Research and Development Agreement."
 
     BioChem's success to date has resulted, in large part, from the particular
scientific and management skills of its personnel. There can be no assurance
that such personnel will continue to be available to BioChem or, were they to be
no longer available, that BioChem would be able to attract and retain employees
with similar skills. The continued availability of this group is important to
the business of CliniChem.
 
     Limitation or Termination of Rights and Obligations in Bankruptcy.  In the
event that BioChem voluntarily or involuntarily is party to a bankruptcy,
winding up, receivership, appointment of examiner or trustee, insolvency,
compromise with creditors or similar proceeding, the liquidator, receiver,
examiner, trustee or administrator of BioChem's business and properties may have
broad powers to deal with such business and properties, including the ability to
terminate certain contracts, in which case CliniChem's rights as they relate to
the license granted pursuant to the Technology License Agreement or its right to
receive Product Payments from BioChem pursuant to the terms of the Product
Option Agreement may be adversely affected and any claims of CliniChem in such
case will rank with other claims on an unsecured basis. See "The Agreements and
the Purchase Option--Technology License Agreement" and "--Research and
Development Agreement."
 
     Dependence on BioChem.  Substantially all of the management and operating
activities of CliniChem will be carried out by BioChem under the Research and
Development Agreement and the Services Agreement. CliniChem is not expected to
have its own research, development, clinical, licensing, administra-
 
                                       24
<PAGE>   26
 
tion, manufacturing or marketing employees or facilities and thus will be
entirely dependent on BioChem in these areas. Subject to their respective
obligations under the Research and Development Agreement and the Services
Agreement, consistent with commercially reasonable practices, BioChem will have
sole discretion to determine the allocation of its research, development,
clinical, licensing, administration, manufacturing and marketing employees and
facilities. Although BioChem believes that its personnel, facilities and
third-party arrangements currently are or, in the future, will be adequate for
the performance of its duties under the Research and Development Agreement,
BioChem's proprietary and collaborative development, licensing, manufacturing
and marketing projects may compete for time and resources with projects
undertaken by CliniChem pursuant to the Research and Development Agreement,
thereby delaying development, manufacture and marketing of the CliniChem
Products. Any material adverse change in the business or financial condition of
BioChem would have a material adverse effect upon CliniChem. See "The Agreements
and the Purchase Option--Research and Development Agreement."
 
     Possible Dilution; Reduction of Per Share Purchase Option Exercise
Price.  All CliniChem Common Shares issued by CliniChem after the Distribution
will be subject to the Purchase Option, and the Purchase Option Exercise Price
will not increase as a result of any such issuance. Accordingly, if additional
CliniChem Common Shares were to be issued, the percentage of the Purchase Option
Exercise Price payable with respect to each CliniChem Common Share in the event
BioChem exercises the Purchase Option would be reduced. Liabilities, including
any debt issued by CliniChem, but excluding any debt owed to BioChem, will
reduce the Purchase Option Exercise Price to the extent that such liabilities
exceed CliniChem's cash, cash equivalents, and short-term and long-term
investments (excluding the Available Funds), unless repaid or discharged by
CliniChem prior to exercise of the Purchase Option.
 
     No Assurance of Trading Value or Markets for CliniChem Common Shares; Sale
of Withheld Shares. Although it is expected that the CliniChem Common Shares
will be traded on the Nasdaq, there can be no assurance that there will be an
active trading market for the CliniChem Common Shares. See "Description of
CliniChem's Share Capital." The sale of a portion of the CliniChem Common Shares
distributed to non-Canadian resident Holders on such Holders' behalf in order to
pay any Canadian withholding tax for which these Holders are liable, could
negatively affect the market price of the CliniChem Common Shares. See "The
Distribution."
 
BUSINESS RISKS RELATED TO BIOCHEM AND CLINICHEM
 
     Highly Competitive Industry; Rapid and Significant Technological
Change.  The pharmaceutical industry is highly competitive and subject to rapid
and significant technological change. BioChem and CliniChem anticipate that they
will each face increased competition in the future as new products enter the
market and advanced technologies become available. The CliniChem Programs
currently face intense competition from other pharmaceutical concerns.
Competitors of BioChem and CliniChem in North America and abroad are numerous
and include, among others, major pharmaceutical and chemical companies,
including without limitation some of the licensees (or potential licensees) of
the CliniChem Products, specialized contract research and research and
development firms, universities and other research institutions. Many of these
competitors, particularly large pharmaceutical, vaccine and diagnostic
companies, have substantially greater financial, technical and human resources
than those of BioChem and CliniChem. In addition, many of these competitors have
significantly greater experience than BioChem and CliniChem in undertaking
research, pre-clinical studies and human clinical trials of new pharmaceutical
products, obtaining FDA and other regulatory approvals, and manufacturing and
marketing such products. There can be no assurance that BioChem's and
CliniChem's competitors will not succeed in developing technologies and products
that are as, or more, clinically or cost-effective than the BioChem Technology
or the CliniChem Products or that would render the BioChem Technology and
CliniChem Products obsolete or uncompetitive prior to BioChem's and CliniChem's
recovering research, development or commercialization expenses incurred with
respect to any such BioChem Technology or CliniChem Products. Such success by
BioChem's and CliniChem's competitors in commercializing products more rapidly
or effectively than BioChem and CliniChem could have a material adverse effect
on each of BioChem's and CliniChem's business, financial condition or results of
operations. See "Business of CliniChem."
 
     Government Regulation.  Regulation by governmental authorities in Canada,
the United States and other countries is a significant factor in the production
and marketing of BioChem's products and the
                                       25
<PAGE>   27
 
CliniChem Products and in the conduct of BioChem's ongoing research and
development programs and the CliniChem Programs.
 
     Pharmaceutical and biological products intended for diagnostic, therapeutic
or prophylactic use for humans are governed by the FDA in the United States, by
the Health Protection Branch (the "HPB") in Canada and by comparable agencies in
other countries. For most of these products, the regulations require extensive
clinical trials and other testing and government review and final approval prior
to marketing the product. This procedure is likely to take a number of years and
involves the expenditure of substantial resources. For example, as a general
rule, before obtaining regulatory approval for the commercial sale of any
BioChem product or CliniChem Product under development, Biochem and CliniChem
must demonstrate through pre-clinical studies and clinical trials that the
BioChem product or CliniChem Product is safe and efficacious. The results from
pre-clinical studies and early clinical trials may not be predictive of results
obtained in large scale clinical trials, and there can be no assurance that
BioChem's and CliniChem's or their collaborators' clinical trials will
demonstrate safety and efficacy, achieve regulatory approvals or result in
marketable BioChem products or CliniChem Products. A number of companies in the
biotechnology industry have suffered significant setbacks in advanced clinical
trials, even after achieving promising results in earlier trials. In addition,
government regulations specify standards for manufacturing and marketing
pharmaceutical products.
 
     The Center for Biologics Evaluation and Research (the "CBER") in the United
States, the Bureau of Biologics and Radiopharmaceuticals (the "BBR") in Canada,
and similar agencies in other countries, regulate the manufacturing, marketing
and use of vaccines. Product License Applications and Establishment License
Applications or equivalent documentation are required to be submitted to the
governmental authorities for review prior to obtaining marketing approval.
Government regulations specify standards for manufacturing and marketing
vaccines and biological products. These regulations set standards for proof of
safety and effectiveness, establish good manufacturing practices, require
inspection of vaccine manufacturing facilities and require reporting of adverse
events to regulatory authorities. These government authorities also conduct
pre-release testing of vaccines and authorize the sale of each lot of vaccines.
 
     Sales of therapeutic and vaccine products outside Canada and the United
States are subject to regulatory requirements that vary from country to country.
Whether or not FDA, HPB, CBER or BBR approval has been obtained, final approval
of a product by comparable regulatory authorities of other countries must be
obtained prior to the commencement of marketing the product in those countries.
The time required to obtain any such approval may be longer or shorter than that
required for FDA, HPB, CBER or BBR approval.
 
     Any failure by BioChem and CliniChem or their collaborators or licensees to
obtain, or any delay in obtaining, regulatory approvals could adversely affect
the marketing of any CliniChem Products and CliniChem's ability to receive
product or royalty revenue. There can be no assurance that any of CliniChem's
planned products will be approved by the FDA, HPB, CBER or BBR or any other
governmental agency on a timely basis, if at all. See "Business of
CliniChem--Government Regulation."
 
     Uncertainty Regarding Patents and Proprietary Technology; Unpredictability
of Patent Protection. BioChem's and CliniChem's success will depend, in part, on
BioChem's ability to obtain and enforce patents, protect trade secrets and other
proprietary information and operate without infringing on the proprietary rights
of others. There can be no assurance that patent applications for a BioChem
product or a CliniChem Product will be approved, that BioChem or CliniChem will
develop any BioChem product or CliniChem Product or process to the point that it
is patentable, that any issued patents for a BioChem product or a CliniChem
Product will provide BioChem or CliniChem with adequate protection or will not
be challenged by others, or that the patents of others will not impair the
ability of BioChem or CliniChem to do business. Furthermore, there can be no
assurance that others have not or will not independently develop similar
products, duplicate any unpatented BioChem products or CliniChem Products or
design around any patented BioChem products or CliniChem Products in development
or marketed by BioChem or CliniChem.
 
     BioChem currently holds a United States patent claiming BCH-4556 and
related compounds, as well as issued patents and pending applications covering
BCH-4556 and methods of using the same in numerous countries. Emory University
of Atlanta, Georgia has filed an opposition to BioChem's granted European patent
application covering BCH-4556. BioChem is vigorously defending its application.
                                       26
<PAGE>   28
 
     An examined patent application, claiming use of stress proteins for the
preparation of vaccines, filed by the Whitehead Institute for Biomedical
Research, has been published for opposition in Europe. Oppositions to this
application have been filed by BioChem as well as another party and BioChem is
vigorously opposing this application. There is no assurance, however, that
BioChem will be successful in defeating these claims. The Whitehead Institute
holds a corresponding patent in Canada and may have pending applications in
other countries. In the event that BioChem were to be unsuccessful in
challenging the broad claims in the Whitehead patents, there is no assurance
that BioChem would be able to obtain a license to these patents, which may be
required to commercialize a Streptococcus pneumoniae vaccine based on the HSP72
heat shock protein.
 
     BioChem and CliniChem are aware of certain issued patents and patent
applications of others, and there may be other patents and patent applications,
containing subject matter which BioChem or CliniChem or their licensees or
collaborators may require in order to research, develop or commercialize certain
of BioChem's products or the CliniChem Products. There can be no assurance that
BioChem or CliniChem or their collaborators will be able to obtain a license to
any third-party technology or patents that they may require to conduct BioChem's
research and development programs or the CliniChem Programs or that such
technology or patents can be licensed at a reasonable cost. Failure by BioChem,
CliniChem or their collaborators to obtain a license to any technology or
patents that they may need to commercialize BioChem's products, the BioChem
Technology or the CliniChem Products may result in delays in marketing BioChem's
products or the CliniChem Products or the inability to proceed with the
development, manufacture or sale of Biochem's products or the CliniChem Products
requiring such licenses and may have a material adverse effect on either BioChem
or CliniChem.
 
     Litigation, which could result in substantial cost to BioChem, may also be
necessary to enforce any patents issued to BioChem or to determine the scope and
validity of other parties' proprietary rights, which may affect the CliniChem
Products and the likelihood that BioChem would exercise the Product Option with
respect to such products. If the outcome of any such litigation is adverse to
BioChem, either BioChem's or CliniChem's business could be materially adversely
affected.
 
     BioChem also relies upon trade secrets, know-how, and continuing
technological advancement to develop and maintain its competitive position.
Disclosure and use of BioChem's know-how is generally controlled in part under
confidentiality agreements with the parties involved. In addition, BioChem has
confidentiality agreements with its key employees, consultants, officers and
directors. There can be no assurance, however, that all confidentiality
agreements will be honored, that others will not independently develop
equivalent technology, that disputes will not arise as to the ownership of
intellectual property, or that disclosure of BioChem's trade secrets will not
occur. Furthermore, there can be no assurance that others have not obtained or
will not obtain patent protection that will exclude BioChem from using its trade
secrets and confidential information. BioChem supports and collaborates in
research conducted in universities and in government research organizations.
There can be no assurance that BioChem will have or be able to acquire exclusive
rights to inventions or technical information derived from such collaboration or
that disputes would not arise as to rights in derivative or related research
programs conducted by BioChem. In addition, in the event of BioChem's
contractual breach or bankruptcy, certain of BioChem's collaborative research
contracts provide for transfer of technology (including any patents or patent
applications) to the collaborators. To the extent that consultants or research
collaborators use intellectual property owned by others in their work with
BioChem, disputes may also arise as to the rights to related or resulting
know-how or inventions. See "Business of CliniChem--Patents."
 
     Uncertainty of Pharmaceutical Pricing and Third-Party Reimbursement.  The
business and financial condition of diagnostic, pharmaceutical, vaccine and
biotechnology companies will continue to be affected by the efforts of
governments and third-party payors to contain or reduce the costs of healthcare
through various means. For example, in certain foreign markets pricing or
profitability of prescription pharmaceuticals is subject to government control.
In the United States there have been, and BioChem and CliniChem expect that
there will continue to be, a number of federal and state proposals to implement
similar government control. In addition, an increasing emphasis on managed care
in the United States has and will continue to increase the pressure on
pharmaceutical pricing. While neither Biochem nor CliniChem can predict whether
such legislative or regulatory proposals will be adopted or the effects such
proposals or managed care efforts
                                       27
<PAGE>   29
 
may have on its business, the announcement of such proposals and the adoption of
such proposals or efforts could have a material adverse effect on either
BioChem's or CliniChem's business and financial condition. Further, to the
extent such proposals or efforts have a material adverse effect on other
pharmaceutical companies that are prospective corporate partners for either
BioChem or CliniChem, BioChem's or CliniChem's ability to establish a strategic
alliance may be adversely affected. In addition, in Canada, the United States
and elsewhere, sales of prescription pharmaceuticals, vaccines and diagnostic
products are dependent, in part, on the availability of reimbursement to the
consumer from third-party payors, such as government and private insurance
plans. Third-party payors are increasingly challenging the prices charged for
medical products and services. To the extent BioChem or CliniChem succeed in
bringing products to market, there can be no assurance that these products will
be considered cost-effective and that reimbursement to consumers will be
available or will be sufficient to allow either BioChem or CliniChem to sell its
products on a competitive basis.
 
     Product Liability Exposure and Insurance.  The use of any of BioChem's
products or CliniChem Products in clinical trials, and the sale of any of
BioChem's products or CliniChem Products, may expose BioChem or CliniChem to
liability claims resulting from the use of Biochem's products or the CliniChem
Products. These claims might be made directly by consumers, healthcare providers
or by pharmaceutical companies or others selling such products. Neither BioChem
nor CliniChem currently have liability insurance with respect to sales of
BioChem's products or CliniChem Products. There can also be no assurance that
BioChem or CliniChem will be able to obtain or maintain commercially reasonable
product liability insurance for any of BioChem's products or CliniChem Products
approved for marketing. A successful product liability claim or a series of
claims brought against BioChem or CliniChem could have a material adverse effect
on its business, financial condition or results of operations.
 
BUSINESS RISKS RELATED TO BIOCHEM
 
     Development of New Products; Market Acceptance of Products.  Except for
3TC, BioChem's potential therapeutic products, including lamivudine for use as a
treatment against chronic hepatitis B, are in research or development. In
addition, except for several vaccines and other diagnostic products which
BioChem currently markets, potential vaccine and diagnostic products are in
research or development. BioChem is devoting its efforts to the research and
development of potential therapeutic, vaccine and diagnostic products based upon
various technological approaches. The development of new products is subject to
a number of significant risks. Potential products that appear to be promising in
various stages of development may not reach the market for a number of reasons.
Such reasons include the possibilities that the potential product will be found
ineffective or unduly toxic during preclinical or clinical trials, will fail to
receive necessary regulatory approvals, will be difficult to manufacture in a
large scale, will be uneconomical to market or not achieve market acceptance, or
will be precluded from commercialization by proprietary rights of third parties.
Competitive products may render BioChem's technology and products obsolete and
non-competitive prior to potential products reaching the market. Most of
BioChem's potential products will require significant additional research and
development efforts and significant additional preclinical and clinical testing,
prior to any commercial use. In addition, there can be no assurance that BioChem
will successfully address any of these technological challenges, or others that
may arise in the course of development. In addition, there can be no assurance
that any of BioChem's products in development will achieve market acceptance.
The degree of market acceptance will depend upon a number of factors, including
the receipt of regulatory approvals, the establishment and demonstration in the
medical community of the clinical efficacy and safety of BioChem's product
candidates, and the establishment and demonstration of the potential advantages
over existing and new treatment methods and reimbursement policies of government
and third-party payors. There can be no assurance that physicians, patients,
payors or the medical community in general will accept and utilize any existing
or new products that may be developed by BioChem.
 
     Risks Associated with the Commercialization of 3TC and
lamivudine.  BioChem's ability to maintain profitability will depend in large
part on Glaxo Wellcome's ability to continue successful commercialization of
3TC. The degree of continued market acceptance of 3TC will depend upon a number
of factors, including ongoing demonstration in the medical community of the
clinical efficacy and safety of 3TC, the potential advantages over existing and
new treatment methods and reimbursement policies of various governments and
 
                                       28
<PAGE>   30
 
third-party payors. There can be no assurance as to the extent to which
physicians, patients, payors or the medical community in general will continue
to accept and utilize 3TC. Third-party payors are increasingly challenging the
prices charged for medical products and services. There can be no assurance that
3TC will continue to be considered cost-effective and that reimbursement to
consumers will be available or will be sufficient to allow BioChem or Glaxo
Wellcome to continue to sell 3TC on a competitive basis.
 
   
     Glaxo Wellcome, BioChem's partner for the development and commercialization
of lamivudine, has filed for regulatory approval for the commercialization of
lamivudine in some 30 countries worldwide. Glaxo Wellcome is currently
completing the Phase III clinical trial program of lamivudine for chronic
hepatitis B infection. To date, a total of nine Phase III clinical trials have
been initiated and almost all completed. Overall, studies confirm that
lamivudine has an excellent safety and efficiency profile across diverse
hepatitis B patient groups from Europe, Asia and North America. BioChem expects
lamivudine to be approved in its first markets during 1998 and believes that it
will be a significant step forward in the treatment of chronic hepatitis B.
However, there can be no assurance that regulatory approval will ever be granted
to market and sell lamivudine in any country in which such approval has been
sought. In addition, there can be no assurance of market acceptance of
lamivudine for the treatment of chronic hepatitis B in any country in which
regulatory approval is granted.
    
 
   
     Reliance on Glaxo Wellcome and Other Collaborative Relationships.  BioChem
is almost totally reliant on third parties for the manufacturing and marketing
of its therapeutic products. BioChem's development and commercialization
agreements with Glaxo Wellcome provide Glaxo Wellcome with worldwide rights,
with the exception of Canada, to develop, manufacture and market 3TC and
lamivudine and certain related compounds (the "3TC Products"). Rights for the
Canadian market were licensed to Glaxo Wellcome, to be exploited in a
partnership between Glaxo Wellcome and BioChem, which markets 3TC in Canada.
Glaxo Wellcome has agreed to manufacture all of the 3TC Products required to be
supplied in Canada. BioChem also entered into a series of agreements with Astra
AB providing for the research, development and commercialization of a new class
of analgesic compounds for the control of pain. There can be no assurance that
BioChem will be able to negotiate other acceptable arrangements in the future or
that any existing or future collaborations will be successful. Furthermore,
there can be no assurance that the collaborators' interests are or will remain
consistent with those of BioChem or that they will succeed in developing any new
marketable products or obtaining requisite government approvals. Should BioChem
and its collaborators fail to develop any new marketable products, obtain the
requisite regulatory approvals or market any of such products successfully,
BioChem's business, financial condition and results of operations may be
materially and adversely affected. In addition, BioChem cannot control the
amount and timing of resources which its collaborators devote to BioChem's
programs. Certain of these agreements do not prevent the collaborators from
pursuing alternative technologies that could result in their developing products
competitive with those products developed under BioChem's collaborative
agreements. The agreements may be terminated by the collaborators in certain
circumstances with limited notice, and the collaborators may thereupon acquire
certain rights to the products under development.
    
 
     Uncertainties of Financial Results.  BioChem's ability to maintain
profitability in the foreseeable future depends on the continued commercial
success of 3TC. BioChem's operating results are dependent upon the marketing
efforts of Glaxo Wellcome, and may lag actual sales of 3TC due to reporting
delays from Glaxo Wellcome to BioChem. Consequently, revenues are difficult to
predict and may fluctuate substantially from period to period. In addition,
other BioChem development programs will require substantial additional
investment, including the cost of clinical trials, obtaining additional
regulatory approvals, if necessary, the completion of commercial-scale vaccine
manufacturing facilities and marketing and sales expenses associated with
potential new product introductions. There can be no assurance if or when
BioChem will successfully develop, receive regulatory approvals for or
manufacture or market any new products. The research, development, production
and marketing of new products will require the application of considerable
technical and financial resources by BioChem and its collaborators, while
revenues that are generated by such products, if successfully developed and
marketed, may not be realized for several years. In addition, involvement in any
patent litigation may materially adversely affect BioChem's future business,
financial condition and results of operations. No assurance can be given that
BioChem will be able to sustain profitability.
 
                                       29
<PAGE>   31
 
     Volatility of BioChem Common Share Price.  The market prices for the
securities of biopharmaceutical and biotechnology companies, including BioChem,
have historically been highly volatile, and the market has from time to time
experienced significant price and volume fluctuations that are unrelated to the
operating performance of particular companies. Factors such as fluctuations in
BioChem's operating results, announcements of technological innovations or new
therapeutic products by BioChem or its competitors, clinical trial results,
governmental regulation, developments in patent or other proprietary rights,
public concern as to safety of drugs developed by BioChem, CliniChem or others
and general market conditions can have an adverse effect on the market price of
the BioChem Common Shares and the CliniChem Common Shares. In particular, the
realization of any of the risks described herein could have a material adverse
impact on such market price.
 
     Shares Eligible for Future Sale.  As of January 31, 1998, there were
108,258,990 BioChem Common Shares outstanding. BioChem, as the holder of the
majority of the outstanding Class B Shares after the Distribution, has the
right, provided for in CliniChem's Articles, to acquire all (but not less than
all) of the outstanding CliniChem Common Shares. BioChem may pay the Purchase
Option Exercise Price in cash, in BioChem Common Shares or in any combination of
cash and BioChem Common Shares. The issuance of BioChem Common Shares in
connection with the exercise of the Purchase Option would result in a dilution
in the percentage ownership of BioChem's shareholders in BioChem at the time of
issuance and could negatively affect the market price of BioChem Common Shares.
See "The Agreements and the Purchase Option -- Purchase Option."
 
     Absence of Dividends.  BioChem has never paid any cash dividends on the
BioChem Common Shares. BioChem currently anticipates that it will retain all
available funds for use in its business and does not expect to pay any cash
dividends in the foreseeable future.
 
     International Operations; Currency Fluctuations.  Most of BioChem's
diagnostic and therapeutic product sales are made, and BioChem expects that they
will continue to be made, in international markets, including the United States.
Sales of BioChem's products in international markets are subject to certain
risks common to such sales, including government regulation, export and import
license requirements, risks of tariffs or trade barriers and political and
economic instability. Although these risks have not had any material effect on
BioChem to date, there can be no assurance these risks will not materially
adversely affect BioChem in the future.
 
     BioChem generally prices its diagnostic and therapeutic products in the
currency of the country in which they are sold. Accordingly, the prices of such
products in Canadian dollars will vary as the value of the Canadian dollar
fluctuates against such local currencies. In addition, royalty payments made to
BioChem by Glaxo Wellcome on 3TC sales worldwide (excluding Canada) are made as
a percentage of sales of 3TC denominated in the currency of the country where
sales are made. There can be no assurance that there will not be increases in
the value of the Canadian dollar against such currencies, reducing the Canadian
dollar return to BioChem on the sales of its products. Furthermore, there can be
no assurance that significant fluctuations in foreign currency values will not
occur that will create sufficient differences in the relative prices of the
products in different countries, such that BioChem or Glaxo Wellcome will find
it necessary to reduce its prices in certain local currencies in order to bring
the relative cost of its products into line. Although BioChem may seek to
implement hedging techniques with respect to its foreign currency transactions
in the future, it does not currently do so and there can be no assurance that
such techniques would be successful.
 
   
     Shareholder Rights Plan (Anti-takeover Provisions).  On June 7, 1995 the
shareholders of BioChem approved a Shareholder Rights Plan (the "Rights Plan")
and on April 21, 1998 amended the Rights Plan. Under the Rights Plan, one common
share purchase right was issued on April 28, 1995 in respect of each outstanding
BioChem's Common Share and became issuable in respect of each BioChem Common
Share issued thereafter. The Rights Plan expires on June 30, 2003 unless
terminated earlier by BioChem Board of Directors. The effect of the Rights Plan
is to require anyone who seeks to acquire 20.0% or more of BioChem's voting
shares, or anyone holding at least 20.0% of BioChem's voting shares who seeks to
acquire an additional 1.0%, to make a bid complying with specific provisions.
The provisions of the Rights Plan could prevent or delay the acquisition of
BioChem by means of a tender offer, a proxy contest or otherwise in which
shareholders might receive a premium over the current market price.
    
 
                                       30
<PAGE>   32
 
                                THE DISTRIBUTION
 
     The Board of Directors of BioChem has declared a distribution, payable to
Holders, of one CliniChem Common Share for every 40 BioChem Common Shares owned
by such Holder on the Record Date. As a result of the Distribution, all of the
then outstanding CliniChem Common Shares will be distributed to the Holders.
Neither BioChem nor CliniChem will receive any proceeds in connection with the
Distribution. After the Distribution, BioChem will hold all of the authorized
and issued Class B Shares. See "Description of CliniChem's Share Capital."
 
     Subject to certain conditions set forth in the Distribution Agreement,
BioChem will effect the Distribution (expected to be on or about           ,
1998) by delivering all of the CliniChem Common Shares to the Distribution
Agent. Commencing on or about the Distribution Date, the Distribution Agent will
begin distributing share certificates reflecting ownership of CliniChem Common
Shares to Holders.
 
     No fractional shares will be issued as part of the Distribution. Fractional
CliniChem Common Shares will be rounded up to a whole share by the Distribution
Agent.
 
   
     A total of approximately 2,706,475 CliniChem Common Shares, being all of
the CliniChem Common Shares then held by BioChem are expected to be distributed,
assuming 108,258,990 BioChem Common Shares (the number of BioChem Common Shares
outstanding on January 31, 1998) are outstanding on the Record Date. No Holder
will be required to pay any cash or other consideration for the CliniChem Common
Shares received in the Distribution (exclusive of applicable Canadian
withholding taxes), nor will any action be required to be taken by any Holder in
order to receive CliniChem Common Shares.
    
 
     However, Canadian withholding taxes will be payable. A portion of the
CliniChem Common Shares otherwise deliverable to certain Holders who are not
residents of Canada will be withheld and sold on such Holders' behalf in order
to pay any Canadian withholding tax for which such Holder is liable. In the case
of a U.S. Holder, pursuant to the Canada-United States Income Tax Convention,
the rate of withholding is generally 15%. Revenue Canada will not accept
CliniChem Common Shares in satisfaction of the withholding obligation and thus
BioChem will remit the proceeds from market sales of withheld shares to satisfy
such obligation. In the case of U.S. Holders who hold their BioChem Common
Shares through DTC, DTC will debit the broker-dealer's account for the amount of
cash equal to 15% of the fair market value of the dividended shares and remit
such amount to Revenue Canada. The broker-dealer will then debit the account of
such Holder for a like amount. However, in the case of Registered U.S. Holders,
BioChem needs to withhold 15% of the fair market value of the shares distributed
to such Holders and remit the proceeds from the sale of such shares to Revenue
Canada. Less than 1% of BioChem's Common Shares held by non-resident Holders are
held by Registered U.S. Holders. Such sales of CliniChem Common Shares will be
effected following the Distribution pursuant to Regulation S under the
Securities Act in one or more offshore transactions, including open-market
transactions on a Canadian stock exchange, which are not subject to the
registration requirements of the Securities Act and applicable state securities
laws. The distribution of the CliniChem Common Shares withheld may be effected
from time to time in one or more transactions on behalf of the Holder (which may
include block transactions) on either the Montreal Exchange or The Toronto Stock
Exchange, in negotiated transactions, through the writing of options on shares
(whether such options are listed on an options exchange or otherwise), or a
combination of such methods of sale, at fixed prices which may be changed, at
market prices prevailing at the time of sale, at prices related to such
prevailing market prices or at negotiated prices. See "Income Tax
Considerations."
 
     The general terms and conditions of the Distribution and the arrangements
between BioChem and CliniChem are set forth in the BioChem/CliniChem Agreements.
See "The Agreements and the Purchase Option."
 
     Shareholders of BioChem with inquiries regarding the Distribution should
contact BioChem's principal executive office: BioChem Pharma Inc., 275
Armand-Frappier Blvd., Laval, Quebec, Canada H7V 4A7, Attn: Investor Relations;
Telephone: (514) 978-7771.
 
                                       31
<PAGE>   33
 
                       CLINICHEM PRO FORMA CAPITALIZATION
 
     The following table sets forth the pro forma capitalization and certain
other balance sheet data of CliniChem as of February 6, 1998, as adjusted to
give effect to the contribution to capital by BioChem of $150 million by BioChem
to the capital of CliniChem, the filing of an amendment to the Articles and the
issuance to BioChem of CliniChem Common Shares and Class B Shares prior to the
Distribution. The data set forth below should be read in conjunction with the
Financial Statements and related Notes included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                                        AS AT              PRO FORMA
                                                      AUTHORIZED   FEBRUARY 6, 1998   FEBRUARY 6, 1998(1)
                                                      ----------   ----------------   -------------------
                                                                      (audited)           (unaudited)
<S>                                                   <C>          <C>                <C>
Cash................................................                 $      1,000        $150,001,000
                                                                     ============        ============
Shareholder's equity:
  Common Shares.....................................      1,000             1,000           --
                                                                    (1,000 shares)
  Class A Common Shares.............................  Unlimited          --                       167
                                                                                       (2,706,475 shares)
  Class B Common Shares(2)..........................      1,000          --                       833
                                                                                        (1,000 shares)
  Contributed Surplus...............................                     --               150,000,000
                                                                     ------------        ------------
Total shareholders' equity..........................                 $      1,000        $150,001,000
                                                                     ============        ============
</TABLE>
 
- ---------------
(1)  See footnotes (a) and (b) to the Pro Forma Balance Sheet on page F-7 for a
     description of the pro forma adjustments reflected in the adjusted
     balances.
 
(2)  All Class B Shares issued and outstanding, as adjusted, are held by
     BioChem.
 
              REASONS FOR THE DISTRIBUTION AND EFFECTS ON BIOCHEM
 
     BioChem is a leading biopharmaceutical company engaged in the research,
development and marketing of therapeutic products and the research, development,
manufacturing and marketing of vaccine and diagnostic products for a wide range
of infectious and other diseases. For the fiscal year ended December 31, 1997,
BioChem had operating revenue of $280.8 million and net income of $79.8 million.
At December 31, 1997, BioChem shareholders' equity was $498.1 million.
 
     BioChem conducts its business through BioChem Therapeutic Inc., BioChem
Vaccines Inc., BioChem ImmunoSystems Inc. and BioChem's foreign subsidiaries.
BioChem's most significant therapeutic product is a novel nucleoside analog,
marketed under the brand name of 3TC, developed with Glaxo Wellcome for the
treatment of patients with HIV infection, including AIDS. The nucleoside analog
is marketed under the brand names 3TC or Epivir. Lamivudine, a different dosage
regimen of 3TC, is also being developed with Glaxo Wellcome as a treatment for
chronic hepatitis B infection, including in the pre- and post-liver transplant
setting to prevent graft re-infection by human hepatitis B virus. BioChem has
also developed, and is manufacturing and marketing, a line of vaccines including
whole virus and split virus influenza vaccines, a combined diphtheria tetanus
vaccine and a vaccine to prevent tuberculosis. BioChem has also developed and is
manufacturing an immunotherapeutic product used in the treatment of certain
superficial bladder cancers. BioChem's diagnostics operations are engaged in the
research, development, manufacturing and marketing of a wide range of diagnostic
products and automated laboratory analyzers for the detection of a variety of
infectious diseases, and for use in immunology, endocrinology and hematology.
 
     At the time of the capital contribution, BioChem will record an investment
in CliniChem of $150 million. Under Canadian GAAP, BioChem will charge the
carrying value of the distribution to retained earnings on the date of the
declaration of the Distribution. Under U.S. GAAP, BioChem will charge the fair
market value of the distribution to retained earnings and will expense the
excess of the carrying value of its investment in CliniChem Common Shares over
the fair market value of these shares. The fair market value of the
 
                                       32
<PAGE>   34
 
CliniChem Common Shares will be determined by BioChem based on their closing
price on relevant stock exchanges on the Distribution Date. This difference
between the Canadian and U.S. GAAP treatment of the Distribution will be
disclosed in a reconciling note to BioChem's financial statements. BioChem will
recognize as revenue the payments from CliniChem under the Research and
Development Agreement and Research and Development Costs incurred by BioChem to
perform its obligations under the Research and Development Agreement will be
expensed as research and development expenses under Canadian and U.S. GAAP.
 
     If BioChem exercises the Purchase Option, the Purchase Option Exercise
Price will be allocated between capitalized intangibles (for the value of
completed CliniChem Products) and in-process research and development (for the
value of research and development on-going under the CliniChem Programs). Under
generally accepted accounting principles in the United States, the value
attributed to in-process research and development will be immediately written
off as an expense, while under generally accepted accounting principles in
Canada it will be amortized over the period benefitted.
 
     BioChem believes that the research and development work it has undertaken,
directly and through collaborators, in the therapeutic and vaccine areas has
yielded results which justify further research and development. However, a
substantial amount of additional research and development effort is required to
further develop the CliniChem Products to their potential commercialization.
Such opportunities involve significantly different risk/reward profiles as
compared to BioChem's established therapeutic, vaccine and diagnostic
businesses.
 
     To continue the advancement of, and in certain cases accelerate, these
projects and programs, BioChem seeks strategic collaborations and ventures, such
as the Glaxo Wellcome collaboration, to provide complementary financing.
BioChem's strategy also involves actively seeking outside product opportunities
through joint ventures, licensing, acquisitions and strategic alliances with
both technology, marketing and geographic partners.
 
     BioChem believes that the formation of CliniChem to conduct the CliniChem
Programs by BioChem, and the arrangements between BioChem and CliniChem, will
provide BioChem with the opportunity to continue to pursue and expand its
product commercialization business. BioChem believes that the arrangements with
CliniChem will significantly benefit BioChem shareholders:
 
     -  separating the risks associated with conducting the CliniChem Programs
       from those associated with BioChem's established therapeutic, vaccine and
       diagnostic businesses;
 
     -  allowing individual shareholders of BioChem to increase or decrease
       their level of participation in the business of conducting the CliniChem
       Programs by varying their level of investment in CliniChem;
 
     -  obtaining for BioChem the exclusive right to commercialize worldwide
       (subject to pre-existing third-party rights) any developed CliniChem
       Product, assuming BioChem's exercise of the Product Option with respect
       to such product or exercise of the Purchase Option, thereby making it
       possible for BioChem to capture a potentially greater return on the
       products researched and developed with CliniChem than may otherwise be
       possible from products researched and developed for commercialization in
       conjunction with other third parties; and
 
     -  allowing BioChem's near-term financial results to continue to reflect
       principally its established therapeutic, vaccine and diagnostic
       businesses, through CliniChem's payment to BioChem for the Research and
       Development Costs.
 
     The foregoing potential benefits to BioChem shareholders of the
arrangements with CliniChem may, however, be offset by certain costs and
detriments, including but not limited to the following: BioChem's loss of
control over research and development activities to be conducted by or on behalf
of CliniChem, which instead will be overseen by CliniChem's Board of Directors;
the administrative costs to BioChem relating to the establishment of CliniChem,
including accounting and legal fees and costs; the potential cost of the
exercise of any of BioChem's options and potential royalties to CliniChem; and
the potential loss of income tax benefits to BioChem which may have been derived
from deduction by BioChem rather than CliniChem of research and development
expenses attributable to the CliniChem Programs.
 
                                       33
<PAGE>   35
 
     After reviewing BioChem's goals and objectives and considering other
possible methods of expanding its product line with proprietary therapeutic and
vaccine products that provide distinctive pharmaceutical and economic benefit,
BioChem's management and Board of Directors believe that continuing to pursue
the research and development of such products through the formation of CliniChem
and the Distribution will significantly benefit the BioChem shareholders. The
Board of Directors' final approval of this transaction was conditioned upon the
advice and the delivery of a written opinion of Merrill Lynch. Merrill Lynch has
delivered an opinion dated        , 1998, substantially to the effect that,
based upon the factors recited in such opinion and the actions described below,
(i) from a financial point of view, the Distribution provides a reasonable
structure to pursue the financial objectives of BioChem set forth above and (ii)
from a financial point of view, the Distribution is fair to Holders.
 
     In delivering its opinion, Merrill Lynch has undertaken, among other
things, the following actions: (a) a review of this Prospectus and certain other
material documents; (b) discussions with members of senior management of BioChem
with respect to the businesses and prospects of BioChem and CliniChem and the
strategic objectives of each; (c) discussions concerning the Distribution with
other representatives and advisors of BioChem; (d) a review of financial and
other information concerning BioChem (with and without CliniChem) that was
either publicly available or was furnished to it by BioChem; (e) a review of
historical prices and trading volumes of the BioChem Common Shares; (f) a review
of the terms and conditions of transactions that are similar to the transactions
contemplated in connection with the Distribution; and (g) a review of such other
financial studies and analyses as it deemed to be appropriate.
 
     The opinion states that Merrill Lynch has relied on the accuracy and
completeness of all information supplied or otherwise made available to it,
discussed with or reviewed by or for it, or publicly available (including the
information contained in this Prospectus), and Merrill Lynch has not assumed any
responsibility for independently verifying such information or undertaken an
independent evaluation or appraisal of any of the assets or liabilities of
BioChem (with or without CliniChem) or been furnished with any such evaluation
or appraisal. In connection with this opinion, Merrill Lynch has not been asked
to, nor has it provided any opinion as to, the valuation or future performance
of CliniChem as an independent public company following the Distribution.
 
     In its opinion, Merrill Lynch does not opine on or give assurances of the
price at which the BioChem Common Shares will actually trade after announcement
of the Distribution or the price at which the CliniChem Common Shares will
actually trade after the Distribution. The opinion notes that such trading
following the Distribution may be characterized by a redistribution among
existing shareholders and other investors and that, accordingly, the BioChem
Common Shares and the CliniChem Common Shares may trade during such period at
prices below those at which they would trade on a fully distributed basis. In
addition, the opinion does not address whether the funds invested by BioChem or
CliniChem will be adequate to accomplish the objective of successfully
conducting the CliniChem Programs.
 
     BioChem will pay Merrill Lynch a fee of US$2.5 million for its services in
connection with the Distribution. The receipt of this fee is contingent upon the
consummation of the Distribution. Merrill Lynch will also be reimbursed for up
to US$200,000 of expenses that it has incurred or will incur in rendering its
services. BioChem has agreed to indemnify Merrill Lynch against certain
liabilities and expenses in connection with its services as financial advisor.
Merrill Lynch may actively trade BioChem Common Shares and may, in the future,
trade CliniChem Common Shares for its own account and for accounts of customers
and, accordingly, may at any time hold a long or short position in such
securities.
 
     BioChem selected Merrill Lynch as its financial advisor because it is a
nationally recognized investment banking firm that has substantial experience in
transactions similar to the Distribution.
 
     Although Merrill Lynch participated in certain of the discussions regarding
the Distribution, the terms of the Distribution were determined by BioChem's
Board of Directors.
 
     Hambrecht & Quist LLC was also retained by Biochem in connection with this
transaction.
 
                                       34
<PAGE>   36
 
                             BUSINESS OF CLINICHEM
 
GENERAL
 
     CliniChem was incorporated by articles of incorporation under the Canada
Business Corporations Act (the "CBCA") by BioChem in January 1998 to conduct
research and development of potential human therapeutic and vaccine products
primarily for the treatment of cancer and HIV infection, including AIDS, and the
prevention of certain infectious diseases. CliniChem has not conducted any
business to date and has no employees. Its three officers are full-time
employees of BioChem. CliniChem does not intend to perform any research,
development or other activities itself, but rather will contract with BioChem to
perform all such activities pursuant to the terms of the Research and
Development Agreement. The CliniChem Programs initially to be conducted under
the Research and Development Agreement are the development of (i) BCH-4556, a
novel nucleoside analog to treat various forms of cancer, (ii) BCH-10652, a
novel nucleoside analog to treat HIV infection, including AIDS (iii) small
molecules to treat solid cancer tumors by inhibiting angiogenesis through the
antagonism of the a(n)b(3) receptor, (iv) recombinant protein vaccines to
prevent infection by: (a) Neisseria meningitidis, (b) Streptococcus pneumoniae,
(c) Neisseria gonorrhoeae, (d) Haemophilus influenzae non typeable, (e)
Streptococcus Group B and (f) Chlamydia pneumoniae. BioChem has the right, with
the consent of the Board of Directors of CliniChem, to expand the scope of the
CliniChem Programs and to select additional development programs to be conducted
as substitutes for, or in addition to, the Therapeutic Program and the Vaccine
Program.
 
     In order to clinically test, manufacture and market drug products for
therapeutic use, rigorous mandatory procedures and standards established by the
regulatory agencies must be satisfied. See "--Government Regulation".
 
     CliniChem's belief in the potential efficacy of some of the CliniChem
Products is based upon pre-clinical studies performed by BioChem or other third
parties. Neither BioChem nor CliniChem has received FDA approval to begin
clinical trials on any CliniChem Product other than BCH-4556, and neither
CliniChem nor BioChem has received FDA approval for the manufacturing and/or
marketing of any of the CliniChem Products. Consequently, there can be no
assurance that the CliniChem Products or any other products selected for
research and development will receive the necessary FDA approvals, that either
CliniChem or BioChem will commence manufacturing or marketing of any of the
CliniChem Products or as to when manufacturing and marketing of the CliniChem
Products will commence.
 
     In order to conduct its business, CliniChem will depend substantially on
BioChem and BioChem's licensors for rights to use BioChem Technology, for
research and development activities, for administrative services and, if BioChem
exercises the Product Option, for the commercialization of CliniChem Products.
After the expiration of the Product Option for a CliniChem Product, CliniChem
may also perform directly, or engage other third parties to perform on its
behalf, the commercialization of such CliniChem Product. However, it is likely
that BioChem will be responsible for executing substantially all of the
operational activities necessary for CliniChem's business following the
Distribution and continuing through completion of the development stage of the
CliniChem Products, and that the Available Funds will be used primarily to fund
these activities under the Research and Development Agreement and the Services
Agreement and to pay the Technology Fee. CliniChem's Board of Directors will be
responsible for determining which products will be pursued, and for approving
the work plans and other cost estimates therefor. CliniChem's Board of Directors
will supervise and review BioChem's ongoing activities on behalf of CliniChem.
See "Risk Factors--Dependence on BioChem"; "--Uncertainty Regarding Sufficient
Availability of BioChem Research and Development Personnel and Facilities."
 
     Prior to the Distribution, BioChem will contribute $150 million in cash to
CliniChem as a capital contribution. As the holder of the majority of the
outstanding Class B Shares following the Distribution, BioChem will have the
option to acquire all (but not less than all) of the outstanding CliniChem
Common Shares under specified conditions. BioChem has also granted certain
technology licenses and agreed to make specified payments on sales of certain
products in consideration, inter alia, for the payment by CliniChem of the
Technology Fee. In the early years, CliniChem's revenues are expected to be
primarily derived from investment income. In later years, if BioChem were to
exercise its Product Option for any CliniChem Product, or if a CliniChem Product
were commercialized by CliniChem itself or by a third party on behalf of
                                       35
<PAGE>   37
 
CliniChem, CliniChem would derive revenues and/or royalties from sales of the
CliniChem Products or from amounts paid to CliniChem by BioChem or third parties
for the rights to commercialize such CliniChem Products. Until the exercise or
the expiration of the Purchase Option, all such amounts paid to CliniChem by
BioChem will constitute Available Funds.
 
     Unless otherwise indicated, information regarding the number of persons
diagnosed with a particular disease, fatality rates associated with a particular
disease or indication or potential size of a market for treatment of a
particular disease has been obtained from sources published by the World Health
Organization (the "WHO") and the Centers for Disease Control in the United
States (the "CDC").
 
THE CLINICHEM PROGRAMS
 
     BCH-4556
 
     BCH-4556 is a nucleoside analog being developed to treat various forms of
cancer. Nucleoside analogs, such as gemcitabine and Ara-C, are used in the
treatment of cancer. Nucleoside analogs inhibit tumor growth by preventing cell
replication. Currently marketed nucleoside analogs have two major disadvantages
that impair their anti-cancer activity and have limited their use to date.
First, they are rapidly deaminated, which leads to a loss of efficacy and to the
resistance of the cancer to treatment. Second, existing nucleoside analogs are
typically unable to completely stop cell division and therefore do not optimally
treat cancer. BCH-4556 is a nucleoside analog which CliniChem believes will
provide significant benefits in treating various forms of cancer due to its
novel structure. Discovered and synthesized by BioChem scientists, BCH-4556 is
structurally different from currently marketed nucleoside analogs. BCH-4556 is
not vulnerable to deamination and may be able to completely stop cell division.
CliniChem believes that both of these characteristics could lead to improved
efficacy compared to other currently marketed nucleoside analogs. CliniChem
plans to administer BCH-4556 initially by intravenous injection, but is also
examining an oral formulation.
 
   
     BCH-4556 was selected for clinical development based on the activity it
demonstrated against a variety of human tumors grown in immunocompromised mice
and against human tumor cells taken directly from patients. Phase I safety and
pharmacokinetic studies are currently in progress in advanced stage cancer
patients with solid cancer tumors. A single dose regimen is being evaluated in
collaboration with the National Cancer Institute of Canada. Two additional
multiple dose regimens are being conducted in the United States. CliniChem plans
to conduct Phase II clinical trials with BCH-4556 in 1998 targeting various
types of cancer (e.g. renal, prostate, breast, ovarian, colorectal, non-small
cell lung, pancreatic, head and neck, leukemia and melanoma). CliniChem hopes
the initial pilot Phase II studies to demonstrate the types of cancer in which
BCH-4556 shows activity. If it obtains positive results, CliniChem will then
focus on certain types of cancer in the Phase II/III trials.
    
 
     According to Data Monitor Healthcare Reports, 1997; Cancer to 2005,
approximately 8 million people worldwide are diagnosed each year with cancer.
The worldwide market for anti-cancer treatments in 1996 was approximately
US$10.2 billion, or 4.3% of the global pharmaceutical market. In 1996, the
anti-cancer market grew by approximately 12% over the previous year. Factors
influencing the strong growth in the cancer market include: (a) increased
incidence of cancer; (b) improved diagnosis; and (c) development of effective
adjunct therapies which enable more intense, more effective and more widespread
use of chemotherapy. The increased incidence of cancer is due to many factors,
including: (a) worldwide population growth; (b) longer life expectancies; and
(c) increased exposure to carcinogenic environmental or dietary factors.
 
     BCH-10652
 
   
     BCH-10652 is a compound being developed for the treatment of HIV infection
and AIDS which has been shown to stop the replication of the HIV virus in vitro.
BCH-10652 is a nucleoside analog with a novel structure which targets the HIV
reverse transcriptase enzyme. By targeting the reverse transcriptase enzyme,
BCH-10652 appears to interfere with the transcription of viral RNA to viral DNA,
a process necessary for HIV replication. Other nucleoside analogs, such as AZT
and 3TC, also inhibit the reverse transcriptase enzyme. However, BCH-10652
appears to be capable of inhibiting the replication of HIV viruses that have
become resistant to 3TC and AZT and to some protease inhibitors. In addition,
based on in vitro studies, resistance to BCH-10652 appears slow to develope.
CliniChem believes these properties may give BCH-10652
    
 
                                       36
<PAGE>   38
 
a role in the treatment of both HIV-infected patients in whom standard triple
combination regimens are no longer effective and patients who have never
received anti-HIV therapy (first-line therapy). The current approach to HIV
treatment usually relies on triple combination therapy, typically two nucleoside
analogs and a protease inhibitor.
 
   
     Various pre-clinical tests performed to assess the safety of BCH-10652 have
indicated a good safety profile for this compound. Because of the long-term use
of HIV infection treatments, a safe compound has a significant competitive
advantage. A Phase I clinical trial in healthy volunteers was initiated in the
U.S. on May 6, 1998. This study is to assess the safety and pharmacokinetics of
BCH-10652. The results of this trial should enable CliniChem to select two or
three doses for the subsequent Phase II trials, which will be designed to assess
the safety and efficacy of BCH-10652 in HIV-infected individuals.
    
 
     According to Worldwide Antiretroviral Sales, IMS Report, 1997, in 1997, the
antiretroviral (anti-HIV) market was approximately US$2 billion in sales,
divided between reverse transcriptase inhibitors (US$1.2 billion) and protease
inhibitors (US$800 million). The vast majority of the sales were generated in
North America, Western Europe and Japan. The WHO estimates that, as of the end
of 1997, over 30 million people worldwide had been infected with HIV, the virus
that causes AIDS. It is generally believed that the vast majority of individuals
infected with HIV will ultimately develop AIDS, which currently has a very high
fatality rate. Assuming that trends in many parts of the world will continue,
the WHO estimates that, by the year 2000, more than 40 million people worldwide
will have been infected with HIV.
 
ANGIOGENESIS INHIBITORS
 
     Angiogenesis is the process whereby new blood vessels are formed. Over the
last few years, it has been recognized that tumor growth is dependent upon the
formation of new blood vessels to supply the cancer mass with oxygen and
nutrients and to remove carbon dioxide and other metabolic products.
Consequently, angiogenesis is required for the growth and proliferation of
cancer tumors. The inhibition of angiogenesis, therefore, may prevent tumor
growth.
 
     One of the required elements of the angiogenic process is the activation of
the a(n)b(3) receptor. BioChem is pursuing the discovery and development of
small molecules that block the receptor and thus should inhibit solid cancer
tumor growth and progression. Such molecules are expected to be utilized in
combination with standard chemotherapeutic agents to treat a wide variety of
solid cancer tumors. BioChem scientists are currently collaborating with Beth
Israel Deaconess Hospital in Boston, Massachusetts to develop assays and with
Amrad Natural Products Pty Ltd ("ANP") in Melbourne, Australia to identify and
characterize novel, small molecules that inhibit tumor-associated angiogenesis.
To date, BioChem has identified two classes of small molecules that have
demonstrated activity in in vitro angiogenesis models through a(n)b(3)
antagonism. CliniChem will continue to pursue the angiogenesis inhibitor program
with the objective of identifying drug candidates suitable for clinical
development.
 
     There is no product currently marketed which has been approved for the
treatment of cancer by inhibiting angiogenesis. However, there are a number of
agents in pre-clinical and clinical development which are being studied alone or
in conjunction with chemotherapeutic agents. Due to the nature of the angiogenic
process, these agents are likely to be administered over a long period of time
to prevent angiogenesis. If effective in preventing the recurrence of cancer
tumors, CliniChem believes that the market for these angiogenesis inhibitors may
be substantial. CliniChem also believes that such products, if successfully
developed, could be used as: (a) an adjunct to chemotherapy or radiotherapy; (b)
a follow-up to chemotherapy to prevent recurrence of the tumors and metastases;
(c) therapy for large, slow-growing tumors that are less responsive to cytotoxic
chemotherapy; and (d) first-line therapy to bypass drug resistance.
 
VACCINES
 
     Vaccines are antigens, frequently formulated with an adjuvant (an agent
added to antigens to enhance their immunogenicity), that stimulate the immune
system to induce protective immunity. CliniChem intends to develop recombinant
protein vaccines against numerous bacterial infections for which there are no
vaccines currently available or for which existing vaccines have low efficacy.
CliniChem will initially focus its efforts on the development of candidate
vaccines against bacterial diseases related to infections of Neisseria
meningitidis
 
                                       37
<PAGE>   39
 
   
(bacterial meningitis) and Streptococcus pneumoniae (pneumonia, meningitis,
otitis media (acute middle ear infections)) and will be also developing vaccines
against infections of Neisseria gonorrhoeae (gonorrhea), Haemophilus influenzae
non typeable (otitis media), Streptococcus Group B and Chlamydia pneumoniae.
    
 
   
     Most bacterial vaccines available today are polysaccharide vaccines or
conjugate polysaccharide vaccines. Polysaccharide vaccines suffer from a number
of disadvantages. First, polysaccharide vaccines are T-cell independent
antigens, which give rise to no immune memory effect. They therefore only
produce short-term immunity. Second, the existing polysaccharide vaccines
generally are poorly immunogenic in children. Therefore, they do not produce
strong or long lasting immunity in young children, and are non-immunogenic in
children under two years of age. Third, they do not elicit good secondary
responses and, therefore, they cannot be used to produce a booster effect.
Furthermore, there is a strong antigenic variation between the polysaccharides
of different bacterial strains of the same bacteria which necessitates the
combination of multiple antigens to ensure a broader immunity. In other words,
different bacterial strains have unique polysaccharides, making it difficult for
a single polysaccharide vaccine to provide global protection against a broad
range of strains of bacterium. Consequently, numerous polysaccharide antigens
must be administered to protect against multiple strains of a bacterium. The
production of such multi-valent vaccines is time consuming and expensive.
Finally, there are certain infections for which no polysaccharide vaccines
currently exist.
    
 
     In part to overcome certain limitations of polysaccharide-based vaccines,
conjugate polysaccharide vaccines have been and are currently being developed.
One such vaccine to protect against Haemophilus influenzae type B is currently
marketed. These conjugate polysaccharide vaccines couple a polysaccharide-based
vaccine with a protein carrier. Because of the protein carrier, conjugate
polysaccharide vaccines induce a T-cell dependent response, which induces a
memory effect and can be used to produce a booster effect. These conjugate
polysaccharide vaccines, however, have their own limitations. Because of the
limited number of conjugate polysaccharide vaccines that can be combined in a
single dose, current conjugate polysaccharide vaccines provide protection
against only a limited number of strains of a bacterium. In addition, because of
the conjugation process, conjugate polysaccharide vaccines are expensive, time
consuming and difficult to manufacture.
 
   
     BioChem is currently developing recombinant protein vaccines that attempt
to overcome the problems and limitations of both polysaccharide vaccines and
conjugate polysaccharide vaccines. BioChem's recombinant protein vaccines are
T-cell dependent. CliniChem hopes these vaccines will produce (a) immunogenicity
in children under the age of two and (b) a better and long-lasting immunity in
people of all ages. In addition, CliniChem believes that the development of a
vaccine based on a common and conserved antigen in all the strains of a given
bacteria should allow the design of a single protein vaccine that could provide
global protection against multiple strains of a bacterium. Furthermore, such
vaccines should be easier to manufacture and could be more easily combined with
other existing or developed vaccines for other diseases.
    
 
   
     BioChem is working on the development of recombinant protein vaccines
against the following bacterial infections:
    
 
     Neisseria meningitidis
 
     Neisseria meningitidis ("N. meningitidis") causes both endemic and epidemic
disease, principally meningitis and meningococcal septicemia. The current
polysaccharide vaccine has antigens associated with only four (A, C, W135 and Y)
of the twelve serogroups (groups of bacterial strains that share a common
capsular polysaccharide antigen) of N. meningitidis. BioChem has discovered a
protein that appears to hold potential for the development of a new human
vaccine against all strains of N. meningitidis, including serogroup B strains,
which are prevalent and for which no vaccine currently exists. CliniChem
believes that this protein is present in all meningococcal isolates and that it
is exposed at the surface of intact meningococcal cells, where it is accessible
to antibodies. CliniChem believes that this vaccine will have all the benefits
of recombinant protein vaccines described above.
 
   
     In research expirements, BioChem used its candidate vaccine to immunize
mice in order to evaluate the vaccine's ability to confer protection against an
infection by injection of a lethal dose of N. meningitidis strain of serogroup
B. This pre-clinical work showed that the purified protein was immunogenic and
protective when
    
 
                                       38
<PAGE>   40
 
   
administered with an adjuvant. The antibodies present in the serum fraction of
the blood obtained from the immunized mice recognized BioChem's recombinant
protein as well as the native N. meningitidis protein. Work done in research
laboratories showed that the antibodies killed N. meningitidis bacteria. This
type of bactericidal activity is commonly recognized as being indicative of
protection. The recombinant vaccine was also injected into monkeys. The monkeys,
like the mice, developed antibodies that were shown to kill N. meningitidis
bacteria. BioChem has developed a manufacturing process in anticipation of
clinical trials which CliniChem expects to begin in 1998.
    
 
     Acute meningitis and meningococcal septicemia have a high rate of
mortality. The latest outbreak in Sub-Saharan Africa, in 1996, affected over
100,000 people and claimed at least 10,000 lives. The WHO estimates that
approximately 35,000 of the 310,000 cases reported worldwide each year are
fatal. The development of a highly effective vaccine against meningococcal
infection is a research priority identified by the WHO and by the Committee of
the Children's Vaccine Initiative of the United States.
 
     In the United States, infection by N. meningitidis is the second most
common cause of bacterial meningitis (approximately 20% of all cases), affecting
approximately 4,000 people each year. The fatality rate is approximately 10% for
meningococcal meningitis and 20% for meningococcal septicemia, despite therapy
with antimicrobial agents such as penicillin. The incidence of endemic
meningococcal meningitis is highest among children aged 6-12 months and then
steadily declines with age. By 5 years of age, the incidence approximates that
for adults. Serogroup B, for which no vaccine exists, accounts for about 50%-55%
of all cases of infection by N. meningitidis. While serogroup A causes only a
small portion of endemic disease in the United States, it is the most common
cause of epidemics in developing countries.
 
     Streptococcus pneumoniae
 
   
     Streptococcus pneumoniae ("S. pneumoniae") infections are among the leading
causes worldwide of illness and death in young children, persons with underlying
debilitating medical conditions, and the elderly. S. pneumoniae infection is a
cause of meningitis, pneumonia and otitis media. S. pneumoniae has 90 different
serotypes. A polysaccharide vaccine against the 23 most common serotypes has
been available since the early 1980s. It is only 60% effective in preventing S.
pneumoniae-caused meningitis and pneumonia and is not currently used to prevent
otitis media. BioChem has discovered two promising candidate protein vaccines.
Further work to confirm the protection potential of the proteins is ongoing.
This project is at an early stage.
    
 
     Each year, S. pneumoniae accounts for three to six thousand cases of
meningitis, 500,000 cases of pneumonia and seven to ten million cases of otitis
media in the United States alone. Case fatality rates vary by age and the
underlying illness of the patient. According to the CDC the case fatality rates
for some immunocompromised and other high-risk patients have been reported to be
higher than 55% for meningitis and 40% for pneumonia, despite appropriate
antibiotic therapy. In children, S. pneumoniae causes approximately 30% of
otitis media.
 
     CliniChem believes that S. pneumoniae-caused diseases will become more
difficult to effectively manage as strains resistant to antibiotic therapies
become more prevalent. In the past, S. pneumoniae was almost uniformly
susceptible to penicillin, allowing most physicians to treat persons with severe
infections with penicillin alone without testing for antibiotic resistance.
However, since the late 1980s, resistance to penicillin and other antibiotic
agents has spread rapidly. Investigations by CDC of S. pneumoniae-caused
diseases have revealed that, in some areas of the United States, as many as 30%
of disease causing S. pneumoniae strains are not susceptible to penicillin. A
smaller percentage of disease causing S. pneumoniae strains are also resistant
to multiple antibiotic therapies.
 
     Neisseria gonorrhoeae
 
     Infections due to Neisseria gonorrhoeae ("N. gonorrhoeae") are a major
cause of pelvic inflammatory disease, tubal infertility, ectopic pregnancy and
chronic pelvic pain in the United States. Based upon evaluations made by the
CDC, approximately 326,000 cases of gonorrhea were reported in the United States
in 1996, a rate of 124 cases per 100,000 persons. Because 29% of the N.
gonorrhoeae isolates collected in 1996 were resistant to penicillin,
tetracycline or both, antimicrobial resistance remains an important
consideration in the treatment of gonorrhea.
 
                                       39
<PAGE>   41
 
     BioChem believes it has discovered a conserved surface protein that is a
candidate for a recombinant vaccine against infection by N. gonorrhoeae. This
protein is present at the surface of all gonococcal strains evaluated by BioChem
to date. BioChem scientists have sequenced the gene coding for this conserved
protein and have injected animals with the recombinant protein.
 
     In pre-clinical work, BioChem used its candidate recombinant vaccine to
immunize mice in order to evaluate the protein's ability to confer protection
against bacterial infection of N. gonorrhoeae in an animal model. This
pre-clinical work showed that the recombinant gonococcal protein was immunogenic
in mice. BioChem is evaluating this recombinant gonococcal protein in further
experimental animal models of injection.
 
     Haemophilus influenzae
 
     Haemophilus influenzae ("H. influenzae") is a bacterium that is considered
a major human pathogen. There are two types of H. influenzae: the encapsulated
form that has six antigenetically distinct capsular types (types a to f) and the
unencapsulated form (non typeable) that may cause diseases of less virulence
than the encapsulated form. The unencapsulated form is recognized as responsible
for acute respiratory infections, chronic bronchitis, otitis media (40% of all
cases), bacteremia and meningitis (5% of all cases). H. influenzae non typeable
is among the five most common causes of community-acquired pneumonia (between 5%
to 15% of the 500,000 hospital admissions annually in the United States).
Annually, there are typically approximately 4,000 cases of invasive disease in
adults including bacteremic pneumonia (70%), obstetric infections, epiglottis,
meningitis and tracheobronchitis listed to H. influenzae non-typeable. A
conjugate polysaccharide vaccine effective against H. influenzae type B exists
but there is no vaccine currently available against H. influenzae non typeable.
 
     BioChem has identified a membrane surface exposed protein of H. influenzae
that is highly conserved at the surface of various H. influenzae strains.
CliniChem believes that this protein is common and conserved in all the strains
of H. influenzae.
 
     In pre-clinical work, BioChem used its candidate recombinant vaccine to
immunize mice in order to evaluate the protein's ability to confer protection
against H. influenzae bacteria. This pre-clinical work showed that the HI-15
protein used with QuilA as an adjuvant is immunogenic in mice. Vaccination of
mice with the HI-15 recombinant protein enhanced respiratory clearance in an
experimental animal model of pulmonary infection. In a similar experimental
model, intravenous administration of specific antibodies to the HI-15 protein
was also shown to increase respiratory clearance. In a systemic model of
infection, vaccination with the recombinant HI-15 protein conferred protection
against injection of a lethal dose of H. influenzae.
 
     Streptococcus Group B
 
     Streptococcus Group B ("Strep B") is classified under seven serotypes based
on their capsular polysaccharide antigenicity and two subtypes based on the
antigenic characteristics of their surface proteins. Strep B causes invasive
disease and is the most common cause of sepsis and meningitis in newborns in the
United States. Two of every 1,000 infants in the United States develop Strep B
infection within the first three months of life. Case fatality rates are
estimated to be between 5% and 20% for newborns and between 15% and 32% for
adults.
 
     In pre-clinical work, BioChem used its candidate recombinant vaccine to
immunize mice in order to evaluate the protein's ability to confer protection
against Strep B bacteria. This pre-clinical work showed that the recombinant
GBS-1 protein is immunogenic and protective in mice. The protein has been
sequenced by BioChem scientists. The presence of the protein has been observed
so far in all serotypes evaluated.
 
     Chlamydia pneumoniae
 
     According to 1994 estimates of the American Heart Association,
approximately 57.5 million Americans have one or more forms of cardiovascular
disease, among whom approximately 13.7 million have coronary heart disease and
approximately 3.9 million have strokes. Cardiovascular diseases claimed
approximately 955,000 lives in 1994. Coronary heart disease is most commonly
caused by atherosclerotic narrowing of the coronary arteries. It is likely to
produce angina pectoris, heart attack or both.
 
                                       40
<PAGE>   42
 
     Chlamydia pneumoniae ("C. pneumoniae") infections may play a role in
atherosclerosis in heart diseases. The organism is often presented in upper and
lower respiratory tract infections and has been thought recently to contribute
to the process of atherosclerosis. However, substantially more research will be
needed in order to confirm this hypothesis. A vaccine against C. pneumoniae
would offer a viable alternative or supplement to current management of heart
diseases.
 
     BioChem's research program on Chlamydia pneumoniae is at an early stage.
 
POTENTIAL RESEARCH AND DEVELOPMENT EXPENDITURES
 
     The following is a preliminary budget of anticipated expenditures by
CliniChem with respect to the conduct of the initial CliniChem Programs.
CliniChem expects that substantial additional funding will still be required to
commercialize all of the CliniChem Products. Based on CliniChem's current
development schedule, CliniChem does not expect that most of the CliniChem
Products will reach commercial marketability prior to expenditure of all of the
Available Funds. See "Risk Factors--No Assurance of Sufficient Funds." Due to
the long-range nature of the development plans, CliniChem, in consultation with
BioChem, reserves the right to reallocate funds as it deems appropriate,
including investments in additional products.
 
<TABLE>
<CAPTION>
                                                                           CALENDAR YEAR
                                            ----------------------------------------------------------------------------
                                              1998         1999         2000         2001         2002          TOTAL
                                            ---------    ---------    ---------    ---------    ---------    -----------
                                                                      (in millions of dollars)
<S>                                         <C>          <C>          <C>          <C>          <C>          <C>
CliniChem Programs:
Therapeutic Program.....................    $    17.9    $    19.6    $    18.7    $    20.7    $    15.9    $      92.8
Vaccine Program.........................         11.2         14.3         15.0         14.3         14.4           69.2
                                            ---------    ---------    ---------    ---------    ---------    -----------
Total Research and Development Costs....    $    29.1    $    33.9    $    33.7    $    35.0    $    30.3    $     162.0
                                            =========    =========    =========    =========    =========    ===========
</TABLE>
 
     The estimated Research and Development Costs set forth above are based upon
projected development of the CliniChem Products in accordance with the Research
and Development Agreement and pursuant to the CliniChem Programs. Research and
Development Costs include costs of pre-clinical studies; costs of Phase I, Phase
II and Phase III human clinical trials; and costs of filing with the FDA and/or
the HPB (or similar governmental bodies in other countries). The above estimates
will change as CliniChem Products are researched and developed. Because of the
long-range nature of any pharmaceutical product research and development plan,
research and development of a particular product or products could accelerate,
slow down or be discontinued; research and development with respect to
additional CliniChem Products could be commenced; technology or products could
be purchased or licensed; and other unforeseen events could occur, all of which
would significantly affect the timing and amount of expenditures. See "Risk
Factors--No Assurance of Successful Final Development of the CliniChem
Products."
 
PATENTS
 
     BioChem has been granted certain patents worldwide and has pending patent
applications worldwide relating to the CliniChem Programs. It is expected that
BioChem will attempt to secure patent coverage to protect each of the CliniChem
Products. Any such patents will be owned by BioChem, included among the
Developed Technology and licensed to CliniChem pursuant to the Technology
License Agreement. BioChem believes that these current patents, and patents
relating to the CliniChem Programs that may be obtained in the future, are
important to its future operations and to CliniChem.
 
     BioChem currently holds a United States patent claiming BCH-4556 and
related compounds, as well as issued patents and pending applications in
numerous countries covering BCH-4556 and methods of using the same. BioChem also
holds a United States patent claiming processes for preparing BCH-4556 and
related compounds, and numerous issued patents and pending applications
worldwide claiming processes of preparing BCH-4556 and related compounds.
 
     BioChem holds an issued patent in the United States claiming BCH-10652 and
related compounds, as well as issued patents and pending applications in
numerous countries claiming BCH-10652, processes of preparation and methods of
using the same to treat viral infections, including HIV.
 
                                       41
<PAGE>   43
 
     BioChem has numerous patent applications pending worldwide claiming
proteins of N. meningitidis and N. gonorrhoeae and vaccines containing such
proteins. BioChem also has numerous patent applications pending worldwide
claiming the HSP72 heat shock protein of S. pneumoniae and its use in vaccines.
 
     Patent protection generally has been important in the pharmaceutical
industry, and the commercial success of the CliniChem Products may depend, in
part, upon BioChem's ability to obtain and enforce patent protection. Although
BioChem's existing patents, pending patents, and any patents obtained in the
future may be of importance to CliniChem, there can be no assurance that any
additional patents will be issued or that any patents now or hereafter issued
will be of commercial benefit.
 
     The grant of a patent is not conclusive as to such validity or
enforceability of the claims therein. The validity and enforceability of a
patent after its issuance by the United States Patent Office can be challenged
in litigation and reexamination proceedings, and the validity of a patent
granted by the European Patent Office can be challenged through opposition
proceedings. If the outcome of such litigation or proceeding is adverse to the
owner of the patent, third parties may then be able to use the invention
pertaining to the patent, in some cases without payment. There can be no
assurance that patents covering the CliniChem Products, if and when issued, will
not be infringed or successfully avoided through design innovation.
 
     As of the date of this Prospectus, to the knowledge of CliniChem, the only
significant proceeding against BioChem in relation to the CliniChem Programs is
that Emory University of Atlanta, Georgia has filed an opposition to BioChem's
granted European patent application covering BCH-4556. BioChem is vigorously
defending its application.
 
     It is also possible that third parties will obtain patents or other
proprietary rights that might be necessary or useful to BioChem or CliniChem in
connection with the CliniChem Programs. An examined patent application, claiming
use of stress proteins for the preparation of vaccines, filed by the Whitehead
Institute for Biomedical Research, has been published for opposition in Europe.
Oppositions to this application have been filed by BioChem as well as another
party and BioChem is vigorously opposing this application. There is no
assurance, however, that BioChem will be successful in defeating these claims.
The Whitehead Institute holds a corresponding patent in Canada and may have
pending applications in other countries. In the event that BioChem were to be
unsuccessful in challenging the claims in the Whitehead patents, there is no
assurance that BioChem would be able to obtain a license to these patents, which
may be required to commercialize the S. pneumoniae vaccine based on the HSP72
heat shock protein. In cases where third parties are the first to invent a
particular product or technology, it is possible that those parties will obtain
patents that will be sufficiently broad so as to prevent BioChem or CliniChem
from using certain BioChem Technology or from marketing certain CliniChem
Products. If licenses from third parties are necessary and cannot be obtained,
commercialization of such CliniChem Products could be delayed or prevented.
Third parties may claim that the CliniChem Products infringe their patents; in
such event BioChem or CliniChem would need to defend against such claims.
Defense of such claims could be costly and time consuming. If licenses to the
third party's patents are available, the payments required by the third parties
could be significant.
 
     In addition, CliniChem may use unpatented technology. There can be no
assurance that others will not develop similar technology. Under the terms of
certain of the license and collaboration agreements to which BioChem is a party
and which relate to the CliniChem Programs, BioChem is obligated to exercise
diligence and make certain royalty and milestone payments as well as incur costs
related to filing and prosecuting the underlying patents. Certain agreements are
terminable by either party upon notice if the other party defaults in its
obligations. Should BioChem default under any of its agreements, BioChem and
therefore CliniChem may lose its right to market and sell CliniChem Products
based upon such licensed technology. In addition, there can be no assurance that
BioChem's licensors will meet their obligations to BioChem pursuant to such
licenses. In such event, CliniChem's results of operations and business
prospects would be materially and adversely affected. See "The Business of
CliniChem--The CliniChem Programs." See "Risk Factors--Uncertainty Regarding
Patents and Proprietary Technology; Unpredictability of Patent Protection."
 
     CliniChem will substantially depend on BioChem Technology licensed to
CliniChem pursuant to the Technology License Agreement. Some of the BioChem
Technology is licensed to BioChem by third parties. BioChem does not expect the
termination of such third party licenses to interfere with the CliniChem
Programs.
                                       42
<PAGE>   44
 
FACILITIES AND PERSONNEL
 
     CliniChem is not expected to hire any employees or to acquire any real
property or tangible assets prior to completion of the development stage of the
CliniChem Products. However, pursuant to the Research and Development Agreement,
BioChem has been engaged by CliniChem to conduct the CliniChem Programs under
work plans and cost estimates recommended by BioChem and accepted by CliniChem.
Decisions as to whether and/or when to hire employees, purchase property or
assets, perform administrative functions, engage BioChem to perform
administrative services under the Services Agreement, engage others to do so or
engage third parties other than or in addition to CliniChem to perform research
and development activities will be made by CliniChem. BioChem believes that its
facilities are sufficient for the current development of the CliniChem Programs
but expects that additional facilities and personnel will be required for the
long-term development of such programs. The timing and extent of such additional
facilities will turn, in large part, on the success of CliniChem in pursuing the
CliniChem Programs.
 
GOVERNMENT REGULATION
 
     Regulation by governmental authorities in Canada, the United States and
other countries will be a significant factor in the production and marketing of
the CliniChem Products and in the conduct of the CliniChem Programs.
 
     The laws of most countries require the licensing of manufacturing
facilities, carefully controlled research and extensive testing of products.
Biopharmaceutical companies must establish production complying with good
manufacturing practices, the safety and efficacy of their new products and
control over marketing activities before being allowed to market their products.
The safety and efficacy of a new drug must be shown through clinical trials of
the drug carried out in accordance with the mandatory procedures and standards
established by regulatory agencies.
 
     In Canada, the manufacture and sale of new drugs are controlled by the HPB.
New drugs must pass through a number of testing stages including pre-clinical
testing and clinical trials. Pre-clinical testing involves testing pharmacology
and toxicology in vitro and in animals. Successful results (i.e., potentially
valuable pharmacological activity combined with an acceptable level of toxicity)
can lead to investigational new drug ("IND") status. This enables the
manufacturer of the new drug to begin clinical trials.
 
     In order to achieve IND status in Canada, and IND submission must be filed
with the HPB. The IND submission must contain specified information, including
the results of the pre-clinical test completed prior to the IND submission,
together with any available information regarding the use of the drug in humans.
In addition, since the method of manufacture may affect the efficacy and safety
of a drug, information on manufacturing methods and standards and the stability
of the drug substance and dosage form must be presented so that the HPB can
ensure that the product that may eventually be sold to the public has the same
composition as that determined to be effective and safe in the clinical trials.
Production methods and quality control procedures must be in place to ensure a
relatively pure compound, essentially free of contamination and uniform with
respect to all quality aspects.
 
     Once the HPB accepts the IND submission, the clinical trials presented in
the IND can begin. Clinical trials are carried out in three phases. Phase I
involves pharmacological studies to evaluate toxicity in humans. The new drug is
administered to human patients or healthy volunteers to determine rates of
uptake and distribution, tolerance and prevalence of adverse side effects.
Phases II and III involve therapeutic studies on the new drug. In Phase II, the
drug's efficacy, dosage, side effects and safety are established in a small
number of patients who have the disease or disorder that the drug is intended to
treat. In Phase III, there are controlled clinical trials in which the drug is
administered to a large number of patients who are likely to receive benefit
from the drug. In Phase III, the effectiveness of the new drug is also compared
to a control treatment, either placebo or standard therapy, in the anticipation
that statistically significant clinical efficacy can be demonstrated.
 
     If the clinical studies prove that the new drug has therapeutic value, the
manufacturer submits a new drug submission ("NDS") to the HPB for marketing
approval. The NDS contains all information known about the drug including the
results of pre-clinical testing and clinical trials. Information contained in
the NDS about the drug includes its proper name, its chemical name, details on
method of manufacturing and
                                       43
<PAGE>   45
 
purification and its biological, pharmacological and toxicological properties.
The NDS also provides information about the dosage form of the drug, including
the quantitative listing of all ingredients used in the formulation, its methods
of manufacture, packaging and labeling, the results of stability tests, and its
diagnostic or therapeutic claims and side effects as well as details of the
clinical studies to support the safety and efficacy of the drug. All aspect of
the NDS are reviewed by the HPB. If the NDS is found to be satisfactory, a
notice of compliance is issued permitting the manufacturer to sell the drug
product for a specific indication.
 
     As a condition of issuing a notice of compliance, the HPB may also require
the sponsor to conduct a Phase IV post-marketing surveillance study. This Phase
IV study is usually required when the HPB is interested in additional evidence
of the long term safety and efficacy of the drug when administered to large
numbers of patients. In a Phase IV study, any new information concerning side
effects and all adverse reactions must be reported to the HPB on a periodic
basis while the drug is being marketed.
 
     The regulatory controls on a new drug do not cease once it is on the
market. A new drug may remain in IND status for a number of years until the HPB
is confident that sufficient information concerning the safety and efficacy of
the drug has been accumulated from its general use to release it from the
controls that are applied to all new drugs. Among other things, a manufacturer
of a new drug must report any new information received concerning serious side
effects, including the failure of the new drug to produce its desired effects.
As well, if the HPB determines it to be in the interest of the public health, a
notice of compliance for a new drug may be suspended and the new drug can be
removed from the market.
 
     The regulations under the Food and Drugs Act (Canada) permit the sale to
physicians of drugs which have not received regulatory approval for emergency
treatment of seriously ill patients. This permission is frequently given for
drugs used in the treatment of serious, life threatening conditions prior to the
HPB's approval of the drug. In addition, if a product under clinical
investigation is requested by a physician and specific patient requirements are
met, Canadian Food and Drug regulations permit emergency drug release.
 
     In addition, regulatory control exists in Canada for the pricing of
patented medicines. All patented medicines sold in Canada are subject to pricing
review by the Patented Medicines Prices Review Board.
 
     The Canadian regulatory approval requirements for new drugs outlined above
are similar to those of other major pharmaceutical markets, including the United
States and Europe. Canada has a "fast track" program similar to the United
States "fast track" program described below.
 
     In the United States, the manufacture and sale of new drugs are controlled
by the FDA. Prior to commercial sale, new drugs require FDA approval of a
marketing application (i.e. a new drug application or product license
application). Obtaining marketing approval requires data from adequate and
well-controlled clinical investigations demonstrating to the FDA's satisfaction
a new drug's safety and effectiveness for its intended use. Such data are
generated in studies conducted pursuant to an IND submission, similar to that
required in Canada. As in Canada, clinical studies are characterized as Phase I,
Phase II and Phase III trials or a combination thereof. In a marketing
application, the manufacturer must also demonstrate the identity, potency,
quality and parity of the active ingredients of the new drug involved, and the
stability of those ingredients. Furthermore, the manufacturing facilities,
equipment, processes and quality controls for the new drug must comply with GMP
regulations for drugs or biologic products both in a prelicensing inspection and
in subsequent periodic inspections after licensure. In the case of a biologic
product, an establishment license must be obtained prior to marketing and batch
releasing.
 
     A five-year period of market exclusivity for a drug comprising a new
chemical entity ("NCE") is available to an applicant that succeeds in obtaining
FDA approval of an NCE, provided that the active ingredient of the NCE has never
before been approved in a new drug application. During this exclusivity period,
the FDA may not accept for review any abbreviated application filed by another
sponsor for a generic version of the NCE. Further, a three-year period of market
exclusivity for a new use or indication for a previously approved drug is
available to an applicant that submits new clinical studies that are essential
to support the new use or indication. During the latter period of exclusivity,
the FDA may not approve an abbreviated application filed by another sponsor for
a generic version of the product for that use or indication.
 
                                       44
<PAGE>   46
 
     The FDA has "fast track" regulations intended to accelerate the approval
process for the development, evaluation and marketing of new drugs used to
diagnose or treat life-threatening and severely debilitating illnesses for which
no satisfactory alternative therapies exist. "Fast track" designation affords
early interaction with the FDA in terms of protocol design and permits, although
it does not require the FDA to issue marketing approval after completion of
early stage clinical trials (although the FDA may require subsequent clinical
trials or even post-approval efficacy studies).
 
     There are three procedures for obtaining a marketing authorization in
Europe. First, an applicant may apply for a marketing authorization in each
individual country. Such applications may need specific documentation tailored
to each country's language and requirements.
 
     Alternatively, an applicant who has obtained approval in one country can
expedite subsequent approvals through use of a multi-state procedure. Under this
multi-state procedure, the member states to which a marketing authorization
application has been made are required to grant authorization to market the
product or otherwise formulate reasoned objections. In determining whether to
raise any objections, the member states typically review the documentation
presented to the country that granted the original marketing authorization and
generally take into account the fact that such authorization was granted by the
original country. Where an objection is raised, the matter is referred to the
Committee for Proprietary Medicinal Products (the "CPMP") of the European
Medicines Evaluation Agency which then considers the objection and issues a
non-binding opinion. Each member state must determine whether it will adopt the
CPMP's opinion. This procedure is typically used in respect of generic drugs
produced by a manufacturing process similar to that of a previously-approved
branded drug.
 
     The third possible procedure consists of a centralized process in which
applicants apply directly to the CPMP, which then issues an opinion binding on
all member states. This centralized procedure is mandatory in respect of
biotechnology products and is available in respect of other NCEs or new
formulations of existing approved products that offer a significant improvement
in efficacy or safety over the existing product.
 
     The process of completing clinical trials and obtaining regulatory approval
for a new drug will, in general, take a number of years and require the
expenditure of substantial resources. Even after initial approval has been
obtained, further studies, including post-marketing studies, may be required to
provide additional data on safety necessary to gain approval for the use of the
new drug as a treatment for clinical indications other than those for which the
new drug was initially tested. Also, regulatory agencies may require
post-marketing surveillance programs to monitor a new drug's side effects.
Results of post-marketing programs may limit or expand the further marketing of
new drugs. A serious safety or effectiveness problem involving an approved new
drug may result in a regulatory agency requiring withdrawal of the new drug from
the market and possible civil action.
 
     In addition to the regulatory product approval framework, biotechnology
companies are subject to regulation under provincial, state and federal law,
including requirements regarding occupational safety, laboratory practices,
environmental protection and hazardous substance control, and may be subject to
other existing and future local, provincial, state, federal and foreign
regulation, including possible future regulation of the biotechnology industry.
 
     A number of companies in the biotechnology industry have suffered
significant setbacks in advanced clinical trials, even after achieving promising
results in earlier trials. In addition, government regulations specify standards
for manufacturing and marketing pharmaceutical products.
 
     The CBER, the BBR and similar agencies in other countries regulate the
manufacturing, marketing and use of vaccines. CliniChem Product License
Applications and Establishment License Applications or equivalent documentation
are required to be submitted to the governmental authorities for review prior to
obtaining marketing approval. Government regulations specify standards for
manufacturing and marketing vaccines and biological products. These regulations
set standards for proof of safety and effectiveness, establish good
manufacturing practices, require inspection of vaccine manufacturing facilities
and require reporting of adverse events to regulatory authorities. These
government authorities also conduct pre-release testing of vaccines and
authorize the sale of each lot of vaccines.
 
                                       45
<PAGE>   47
 
     Sales of therapeutic and vaccine products outside Canada and the United
States are subject to regulatory requirements that vary from country to country.
Whether or not FDA, HPB, CBER or BBR approval has been obtained, final approval
of a product by comparable regulatory authorities of other countries must be
obtained prior to the commencement of marketing the product in those countries.
The time required to obtain any such approval may be longer or shorter than that
required for FDA, HPB, CBER or BBR approval.
 
     CliniChem will also be subject to various Canadian federal, provincial, and
local laws, regulations, and recommendations relative to safe working
conditions, laboratory and manufacturing practices, and the use and disposal of
hazardous or potentially hazardous substances, including radioactive compounds
and infectious disease agents, used in connection with BioChem's and CliniChem's
research. CliniChem may be subject to additional government regulations
resulting from future legislation or administrative action.
 
EXECUTIVE OFFICERS AND DIRECTORS
 
     The following table provides information concerning the current officers
and directors of CliniChem. The current officers and the current directors of
CliniChem are also officers and employees of BioChem. As the holder of all the
issued and outstanding Class B Shares, BioChem has the right to elect one
director. CliniChem has no employees. Its three officers are full-time employees
of BioChem.
 
<TABLE>
<CAPTION>
NAME AND MUNICIPALITY OF RESIDENCE             POSITION WITH CLINICHEM
- ----------------------------------             -----------------------
<S>                                            <C>
Francesco Bellini, Ph.D......................  Chairman and President
Town of Mount Royal, Quebec
Frederick J. Andrew..........................  Chief Financial Officer and Director
Morin Heights, Quebec
Francois Legault.............................  Director
Outremont, Quebec
Charles-A. Tessier...........................  General Counsel and Secretary
Ile-Bizard, Quebec
</TABLE>
 
     Following the completion of the Distribution, Messrs. Andrew and Legault
will resign as directors of CliniChem and the Honorable Celine Hervieux-Payette,
P.C. and Ms. Elizabeth Greetham, each of whom has agreed to serve as a director,
will be appointed to the Board of Directors of CliniChem. Their respective
nominations will become effective immediately upon the completion of the
Distribution.
 
     FRANCESCO BELLINI, PH.D., a co-founder of BioChem, joined BioChem as
President and Chief Executive Officer in 1986. From 1984 to 1986, Dr. Bellini
was the Director of the Biochemicals Division at the Institut Armand-Frappier,
and from 1968 to 1984, he was a research scientist with Ayerst Laboratories. Dr.
Bellini is a director of North American Vaccines, Inc. Dr. Bellini received a
B.Sc. in chemistry from Loyola College in Montreal in 1972 and a Ph.D. in
chemistry from the University of New Brunswick in 1977.
 
     FREDERICK J. ANDREW, joined BioChem in 1997 as Chief Financial Officer.
Prior to joining BioChem, he was Vice-President and Treasurer of BCE Inc. from
1991 to 1997, Corporate Treasurer of Bell Canada from 1984 to 1991 and occupied
various positions within the BCE Inc. group of companies from 1964 to 1984. Mr.
Andrew received a B.A. in economics from York University in 1964.
 
FRANCOIS LEGAULT joined BioChem in 1987 and is currently Executive
Vice-President, Investments and Subsidiaries. Prior to joining BioChem, he was
Finance Director of Societe Quebecoise des Transports from 1984 to 1987, and was
a chartered accountant with Coopers & Lybrand from 1978 to 1984. Mr. Legault
received a BAA in business and accounting from Ecole des Hautes Etudes
Commerciales in Montreal in 1978 and was admitted as a Chartered Accountant to
the Ordre des Comptables Agrees du Quebec in 1980.
 
     CHARLES-A. TESSIER joined BioChem as Vice-President, Legal Affairs and
Corporate Secretary in March 1996. From 1988 to 1996, prior to joining BioChem,
he was Vice-President, Secretary and General Counsel of DMR Group Inc., a
multinational company in information technology and, from 1979 to 1988, he
practiced commercial law. Mr. Tessier received a B.A. in Administration in 1976
and a law degree in 1979 from the University of Ottawa. He is a member of the
Barreau du Quebec and the Canadian Bar Association.
 
                                       46
<PAGE>   48
 
     ELIZABETH GREETHAM is a portfolio manager with the Weiss, Peck & Greer
Investments' Life Sciences Fund, L.P. and its Institutional Life Sciences Fund,
L.P. Ms. Greetham has over 25 years experience as a portfolio manager and health
care analyst. Ms. Greetham earned a B.Sc. and an MA (Hons.) from the University
of Edinburgh.
 
     THE HONORABLE CELINE HERVIEUX-PAYETTE, P.C. has served in a variety of
political capacities for the province of Quebec and the federal government of
Canada. Ms. Hervieux-Payette has also twice served as Chair of the Standing
Committee on Policy Development of the Liberal Party of Canada, and also served
as Co-Chair of the Platform Committee. In March 1995, Ms. Hervieux-Payette was
appointed to the Senate of Canada by Prime Minister Jean Chretien and asked to
manage the 1997 federal election campaign as National Campaign Co-Chair. In the
Senate, Sen. Hervieux-Payette sits on the Standing Committee on Banking, Trade
and Commerce, and is Co-Chair of the Standing Committee on Scrutiny and
Regulations. Ms. Hervieux-Payette has also served in a variety of private
capacities, including Vice-President, Regulatory and Legal Affairs, with
telecommunications company Fonorola, Inc. from 1991 until March 1995. In 1995,
she joined the Montreal office of Martineau Walker as Counsel. Ms.
Hervieux-Payette sits on the board of Innovitech Inc. and AXA Canada Inc.
 
     For as long as the Board of Directors of CliniChem is composed of three
directors, the Board of Directors shall assume and fulfill the duties of the
audit committee of CliniChem.
 
     Currently, all the officers of CliniChem are also officers of BioChem and
do not receive any compensation from CliniChem for their services to CliniChem.
See "The Agreements and The Purchase Option--Services Agreement."
 
     Each director of CliniChem who is not an officer or a salaried employee of
BioChem is expected to be paid an annual fee of $18,000 and a further attendance
fee of $1,000 for each meeting of the Board of Directors of CliniChem.
 
PRINCIPAL SHAREHOLDERS OF CLINICHEM
 
     Immediately prior to the Distribution, all of the outstanding CliniChem
Common Shares will be held by BioChem. The following table sets forth the
projected beneficial ownership of CliniChem Common Shares following the
Distribution by all the directors and the officers of CliniChem as a group, as
well as by any person who, on a pro forma basis, will beneficially own more than
10% of the outstanding CliniChem Common Shares.
 
<TABLE>
<CAPTION>
                                                                CLINICHEM COMMON SHARES
                                                                    PROJECTED TO BE
                                                                   BENEFICIALLY OWNED
                                                              ----------------------------
                            NAME                              NUMBER(1)   PERCENT OF CLASS
                            ----                              ---------   ----------------
<S>                                                           <C>         <C>
Glaxo Wellcome Inc. ........................................   396,272          14.6%
  7333 Mississauga Road North
  Mississauga, Ontario
  L5N 6L4
All directors and officers of CliniChem as a group..........    74,172           2.7
  (4 persons)
                                                               -------          ----
                                                               470,444          17.3%
                                                               =======          ====
</TABLE>
 
- ---------------
 
(1) Reflects, in each case, the number of BioChem Common Shares beneficially
    owned as of January 31, 1998, excluding shares issuable upon exercise of
    options, divided by 40. In addition to shares held in the individual's sole
    name, this column includes shares held by the spouse and other members of
    the named persons' immediate household who share that household with the
    named person, and shares held in family trusts.
 
                                       47
<PAGE>   49
 
                      SELECTED FINANCIAL DATA OF CLINICHEM
 
<TABLE>
<CAPTION>
                                                              FEBRUARY 6, 1998
                                                              ----------------
<S>                                                           <C>
BALANCE SHEET DATA:
Cash........................................................    $     1,000
Shareholders' Equity........................................    $     1,000
</TABLE>
 
- ------------------
 
(1) CliniChem was incorporated in January 1998. BioChem contributed $1,000 in
    February 1998 in exchange for 1,000 common shares. CliniChem will have no
    operations through the Distribution Date.
 
                                       48
<PAGE>   50
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
LIQUIDITY AND CAPITAL RESOURCES
 
     CliniChem was incorporated in January 1998. Prior to the Distribution,
BioChem will contribute a total of $150 million in cash to CliniChem as a
capital contribution. CliniChem's funds are expected to be used primarily to
fund activities to be conducted under the Research and Development Agreement
with BioChem, including Research and Development Costs relating to the CliniChem
Programs from the date of the declaration of the Distribution. Such Research and
Development Costs will be the fully burdened cost of the research and
development activities conducted pursuant to the CliniChem Programs plus 5% of
such costs (to reflect an appropriate portion of BioChem's general corporate
overhead allocated to projects undertaken by BioChem on behalf of CliniChem.
Such corporate overhead includes, inter alia, human resources, payroll, legal,
accounts payable, procurement and tax). Research and Development Costs will
include, among other costs, the costs of seeking regulatory approvals, payments
to third party research collaborators, purchase of chemicals, biological
materials and other supplies, purchases of equipment and patent and trademark
filing costs. Indirect costs, estimated to be 20-35% of direct costs, include
salaries and fringe benefits of person managing and supporting those working
directly on CliniChem Programs, general supplies and chemicals, general
information systems and communications support, general equipment depreciation,
general facilities depreciation, utilities, rent, miscellaneous indirect
expenses and miscellaneous general and administrative expenses. BioChem's
capital contribution, together with any investment interest earned thereon, is
expected to fund such activities for approximately four to five years. Based on
CliniChem's current development schedule, CliniChem does not expect that most of
the CliniChem Products will reach commercial marketability prior to expenditure
of the Available Funds. Currently, other than the Available Funds, CliniChem has
no other source for the funding that may be needed to complete the development
and commercialization of the CliniChem Products. CliniChem is not expected to
require facilities or capital equipment of its own during the term of the
Research and Development Agreement. Pending the use of CliniChem's cash
resources for the research and development activities described in this
Prospectus, CliniChem will invest such resources in interest-bearing,
investment-grade securities.
 
     There can be no assurance, particularly given the existence of the
BioChem/CliniChem Agreements, that CliniChem will be able to raise any
additional capital. Such additional capital, if raised, may reduce the per share
proceeds available to holders of CliniChem Common Shares if the Purchase Option
were to be exercised. See "The Agreements and the Purchase Option--Purchase
Option."
 
   
     CliniChem will be dependent on BioChem's computer systems. BioChem, along
with many other companies worldwide, is exposed to the risks and uncertainties
associated with the Year 2000 problem, where a computer may erroneously
interpret the years "2000" and "1900." BioChem is currently in the process of
evaluating the potential impact relating to the Year 2000 issue. The Company is
assessing both internal and external risks associated with the Year 2000. More
specifically, the internal risks include mainly computers hardware and software,
diagnostic instrumentation and other electronic equipments. External risks
relate to the Company's relationship with third party such as major suppliers
and strategic collaborators. This assessment, which is expected to be completed
shortly, will determine the Company's action plan to rectify any issues. The
Company expects that any conversion required will be completed before the year
2000. Presently, the Company does not believe that compliance will result in
material investments, nor does BioChem anticipate that this problem will have
material adverse effects on the business operations or financial performance.
However, there can be no assurance that this problem will not adversely affect
BioChem, its business, or CliniChem.
    
 
OPERATIONS
 
     Prior to the Distribution, CliniChem will not have conducted any
operations. After the Distribution and continuing through completion of the
development stage of the CliniChem Products, CliniChem's operations will be
conducted largely pursuant to the BioChem/CliniChem Agreements. See "The
Agreements and the Purchase Option."
 
                                       49
<PAGE>   51
 
     In its early years, CliniChem revenues are expected to be primarily derived
from investment income (which will become part of the Available Funds). In later
years, CliniChem could receive revenues through the commercialization of the
CliniChem Products either from BioChem in the form of Product Payments if
BioChem were to exercise its Product Option for any CliniChem Product, or
otherwise if BioChem's Product Option for any CliniChem Product were to expire
unexercised and CliniChem were to commercialize the Product alone or with a
third party. However, CliniChem is not expected to earn substantial revenues
unless or until the CliniChem Products are successfully commercialized, which is
not expected to occur prior to the expenditure of all the Available Funds. As a
result of the foregoing factors, it is anticipated that CliniChem will incur
substantial losses which will likely be recurring.
 
   
     CliniChem's expenses largely will be incurred under the BioChem/CliniChem
Agreements. CliniChem will have research and development expenses as a result of
(i) the payment of Research and Development Costs under the Research and
Development Agreement and (ii) payment of the Technology Fee to BioChem under
the Technology License Agreement and the Services Agreement. The Technology
License Agreement provides that the Technology Fee will be payable monthly at a
rate of $352,100 per month over a period of 48 months; provided that the
Technology Fee will no longer be payable at such time as the number of CliniChem
Products being researched or developed by or on behalf of CliniChem plus the
number of CliniChem Products having been acquired by BioChem pursuant to the
exercise of the Product Option is less than two. CliniChem will account for the
Technology Fee as research and development expense on a straightline basis over
the five year life of the Technology Agreement.
    
 
     Pursuant to the Services Agreement, CliniChem will pay $400,000 annually to
BioChem for administrative services provided by BioChem.
 
     Pursuant to the Research and Development Agreement, BioChem will charge
CliniChem for both "direct" and "indirect" Research and Development Costs on a
fully-burdened basis. Direct costs will include fully absorbed cost of labor,
third-party contract costs, such as those expenses paid to outside vendors and
licensors, raw materials, drug substances, drug products, clinical supplies,
compound library, assay acquisition and all other costs which can be directly
identified to a CliniChem Program. Of the approximately $29.1 million fiscal
1998 budget, approximately $20 million is expected to be paid pursuant to
third-party agreements. Indirect costs will include lease payments, building
allocations, equipment allocations, administration services and all other
indirect costs.
 
     The indirect costs are estimated to be approximately 20% to 35% of direct
costs. The indirect cost allocations are based upon BioChem's historical
overhead experience arising from its research and development activities.
 
     CliniChem's future cash flow obligations will derive largely from the
BioChem/CliniChem Agreements. CliniChem is required to expend the Available
Funds only in accordance with the Research and Development Agreement and to pay
the Technology Fee and to pay for services provided under the Services
Agreement. However, the rate at which Available Funds are expended will derive
from work plans and cost estimates approved by CliniChem.
 
                     THE AGREEMENTS AND THE PURCHASE OPTION
 
TECHNOLOGY LICENSE AGREEMENT
 
     CliniChem and BioChem have entered into a Technology License Agreement
pursuant to which BioChem has granted to CliniChem an exclusive perpetual
license, to use BioChem Technology (including any trade secrets, technical
information and data regarding product composition, manufacturing, dosage or
efficacy, drug formulations, and other proprietary pre-clinical, clinical,
pharmacological, toxicological, chemical, physical and analytical safety and
quality control data and information, as well as rights under patents held by
BioChem related to the CliniChem Programs) solely to conduct the CliniChem
Programs and related activities, and to manufacture and to commercialize the
CliniChem Products worldwide. The Technology License Agreement is subject to
pre-existing third-party rights and the receipt of certain third-party consents;
it is further subject to the Research and Development Agreement and the Product
Option Agreements and limited for each CliniChem Product, to a particular Field
of Use. See "--Third-Party Rights and Consents."
 
                                       50
<PAGE>   52
 
     Pursuant to the Technology License Agreement, BioChem is obligated to use
commercially reasonable efforts to obtain the consent of:
 
     -  Pharmadigm, to grant a sublicense to CliniChem (on commercial terms
       reasonably acceptable to BioChem) to any adjuvant licensed by BioChem
       from Pharmadigm and incorporated in a CliniChem Product;
 
     -  Biovector, to grant a sublicense to CliniChem (on commercial terms
       reasonably acceptable to BioChem) to any biovector licensed by BioChem
       from Biovector and incorporated in a CliniChem Product; and
 
     -  UGARF and Yale University, to grant a sublicense to CliniChem (on
       commercial terms reasonably acceptable to BioChem) in connection with the
       BCH-4556 CliniChem Product;
 
provided that, in each case, the relevant CliniChem Product incorporating such
licensed technology has received regulatory approval for commercial marketing in
at least one country, BioChem has not exercised the worldwide Product Option
with respect to such CliniChem Product and BioChem has not exercised the
Purchase Option. Any costs associated with a consent obtained or sublicense
granted pursuant to this provision shall be paid by CliniChem and any such
sublicense shall terminate on the exercise by BioChem of the worldwide Product
Option for such product or the Purchase Option.
 
     The following table sets out the Field of Use for the CliniChem Programs.
 
<TABLE>
<CAPTION>
                   PROGRAM                                     FIELD OF USE
- ---------------------------------------------  ---------------------------------------------
<S>                                            <C>
Development of BCH-4556......................  Treatment of cancer
Development of BCH-10652.....................  Treatment of HIV infection
Development of a(n)b(3) antagonists to
  prevent angiogenesis.......................  Treatment of cancer
Development of recombinant protein             To protect against infections by N.
  vaccines...................................  meningitidis, S. pneumoniae, N. gonorrhoeae,
                                               H. influenzae, Strep B and C. pneumoniae
</TABLE>
 
     Pursuant to the terms of the Technology License Agreement, CliniChem's
right to obtain manufacturing will be subject to a right of first offer and a
right of first refusal on the part of BioChem to manufacture and, in the event
BioChem does not exercise such right of first offer and right of first refusal,
then BioChem will have the right to approve any proposed manufacturer, which
approval may be withheld only if any such manufacturer has insufficient or
inadequate manufacturing capability (including lack of compliance with GMP
regulations) or if any such manufacturer's activities are likely to have a
material adverse effect on BioChem's overall competitive position in the
pharmaceutical industry. In the event that BioChem exercises its right to reject
a manufacturer, BioChem will be obligated to manufacture or obtain manufacturing
for any such CliniChem Product for CliniChem at prevailing market rates, but not
less than BioChem's cost of manufacture plus 15% of such cost.
 
     Pursuant to the Technology License Agreement, CliniChem shall not have the
right to grant a sublicense under the BioChem Technology to anyone other than
BioChem until such time as the Product Option with respect to any CliniChem
Product in one or more countries expires unexercised. From and after the
expiration of such Product Option in any such country, CliniChem may sublicense
BioChem Technology to one or more third parties solely to the extent necessary
to complete the development of, or to make or have made and use such CliniChem
Product, or to sell or have sold such CliniChem Product in such country. BioChem
shall have the right to approve any proposed sublicensee or any manufacturer on
behalf of a sublicensee but such approval may only be withheld if any such
sublicensee or manufacturer has insufficient manufacturing capability (including
lack of compliance with GMP regulations) or if any such sublicensee's or
manufacturer's activities are likely to have a material adverse effect on
BioChem's overall competitive position in the pharmaceutical industry.
 
   
     In consideration for the license to use the existing BioChem Technology
relating to the CliniChem Programs, CliniChem will pay the Technology Fee to
BioChem. The Technology Fee will be payable monthly at a rate of $352,100 per
month over a period of 48 months ; provided that the Technology Fee will no
longer be payable at such time as the number of CliniChem Products being
developed by CliniChem plus the
    
 
                                       51
<PAGE>   53
 
number of CliniChem Products having been acquired by BioChem pursuant to the
exercise of the Product Option is less than two.
 
     Either BioChem or CliniChem may terminate the Technology License Agreement
upon the occurrence of a material breach of the Technology License Agreement or
the Product Option Agreement by the other party which continues for 60 days
after written notice. The Technology License Agreement will automatically
terminate upon termination by BioChem of the Research and Development Agreement
due to a breach thereof by CliniChem or CliniChem's entering into any proceeding
in bankruptcy, reorganization of creditors' rights or similar arrangement. The
Technology License Agreement shall terminate on a product-by- product and
country-by-country basis in connection with BioChem's corresponding exercise of
the Product Option.
 
RESEARCH AND DEVELOPMENT AGREEMENT
 
     Under the Research and Development Agreement, BioChem has agreed to perform
diligently all work necessary to conduct the activities agreed upon by BioChem
and CliniChem pursuant to the CliniChem Programs. BioChem is not required to
devote any specific amount of time or resources to conduct the CliniChem
Programs under the Research and Development Agreement, and BioChem expects to
devote a substantial amount of its time and resources to activities for its own
account. Activities under the Research and Development Agreement will be
undertaken pursuant to work plans and cost estimates proposed by BioChem and
accepted by CliniChem. CliniChem may approve all or any portion of a proposed
work plan and cost estimate or may determine not to approve any proposed work
plan and cost estimate. If CliniChem rejects three consecutive work plans in
whole or in substantial part, BioChem and CliniChem shall resolve the dispute
through arbitration and, pending resolution, BioChem may perform under the most
recently approved work plan and CliniChem will be obligated to pay Research and
Development Costs incurred therewith. CliniChem is not obligated to fund
development of the CliniChem Programs in excess of amounts reflected in approved
work plans and cost estimates. BioChem is not required to undertake activities
that would result in Research and Development Costs exceeding those in approved
work plans and cost estimates.
 
     Under the Research and Development Agreement, CliniChem is expected to
utilize substantially all of the Available Funds to make payments to BioChem for
its Research and Development Costs.
 
     Payments to BioChem under the Research and Development Agreement will be
the full amount of all Research and Development Costs incurred by BioChem in
performing these activities, and BioChem will recognize the payment of such
amounts as research and development revenue. Such costs will consist of direct
costs, including collaborative research agreement payments, payments for
compound supply, payments for biologicals, drug substances and drug products,
payments for chemical precursors, payments for assay acquisitions, payments for
clinical studies, payments for toxicological and pharmacokinetic studies,
process development contracts, manufacturing of batches of vaccines for clinical
trials, immunological studies and other outside services, payments for other
BioChem functions (non-research and development) which provide services,
payments for investigation or research grants, payments for consulting services,
hiring expenses, salaries and fringe benefits for people who will work directly
on CliniChem Programs, milestone payments to third parties, project travel,
entertainment and related expenses, capital equipment and other materials
purchased exclusively for CliniChem Programs, miscellaneous project expenses,
regulatory and filing fees, telephone and communications, patent and trademark
expenses including the cost of prosecution, defense and maintenance of
intellectual property rights, software, payments for clinical research
organizations, payments for monitoring, payments for data management and
insurance, and indirect costs including salaries and fringe benefits of people
managing and supporting those working directly on CliniChem Programs, general
supplies and chemicals, general information systems and communications support,
general equipment depreciation, general facilities depreciation, utilities,
rent, miscellaneous indirect expenses and miscellaneous general and
administrative expenses. The corresponding research and development expenses of
BioChem will offset this revenue. Under the Research and Development Agreement,
BioChem also may license technology or products used to conduct the CliniChem
Programs from third parties and may conduct the CliniChem Programs in
combination with third parties and the costs of such licensing or conduct will
be paid by CliniChem. BioChem may enter into research contracts with third
parties in its own name, but on behalf of CliniChem as agent.
 
                                       52
<PAGE>   54
 
     The Research and Development Agreement provides that CliniChem will fund
Research and Development Costs from the date of the declaration of the
Distribution.
 
     CliniChem has agreed to use diligent efforts to conduct the CliniChem
Programs in accordance with approved work plans and cost estimates under the
Research and Development Agreement by contracting with BioChem to perform
research and development services. CliniChem is required to utilize the
Available Funds only in accordance with the Research and Development Agreement,
the Technology License Agreement and the Services Agreement. It is anticipated
that CliniChem will utilize the Available Funds over a period of approximately
four to five years. Prior to expenditure, CliniChem will invest Available Funds
in interest-bearing, investment-grade securities. CliniChem may not encumber,
pledge or otherwise take any action with respect to Available Funds that could
prevent the full expenditure of such funds under the Research and Development
Agreement. Subject to the terms of the BioChem/CliniChem Agreements, there are
no restrictions on CliniChem's use of its funds other than the Available Funds
to conduct its business as it determines. Based on CliniChem's current
development schedule, CliniChem does not expect that most of the CliniChem
Products will reach commercial marketability prior to expenditure of the
Available Funds.
 
     As between BioChem and CliniChem, BioChem will own all Developed
Technology, including patents, and such Developed Technology, as is required for
the Field of Use of the CliniChem Products, shall be licensed to CliniChem
pursuant to the Technology License Agreement. BioChem will determine whether and
to what extent to seek patent protection for Developed Technology. If BioChem
declines to seek patent protection for any technology, CliniChem will not have
the right to do so.
 
     No more than once in each calendar year upon reasonable notice and during
regular business hours, (i) at CliniChem's expense, BioChem is required to make
available for inspection by the auditors of CliniChem such records of BioChem as
may be necessary to verify the accuracy of reports and payments made under the
Research and Development Agreement, and (ii) at BioChem's expense, CliniChem is
required to make available for inspection by the auditors of BioChem such
records of CliniChem as may be necessary to verify the accuracy of the
application of the Available Funds.
 
     The Research and Development Agreement will terminate upon the exercise or
expiration of the Purchase Option. Either party may terminate the Research and
Development Agreement if the other party (i) breaches the Research and
Development Agreement, Product Option Agreement or any material obligations
thereunder (if such breach continues for 60 days after written notice by the
terminating party), or (ii) enters into any proceeding, whether voluntary or
involuntary, in bankruptcy, reorganization of creditors' rights or similar
arrangement for the benefit of creditors. In addition, CliniChem's product
license in any country with respect to a particular CliniChem Product will
terminate after BioChem's exercise of the Product Option for such product in
such country.
 
PRODUCT OPTION AGREEMENT
 
     Pursuant to the Product Option Agreement, CliniChem has granted the Product
Option to BioChem pursuant to which BioChem may, on a product-by-product and
country-by-country basis, terminate CliniChem's license to the Acquired Product,
and sell and have sold the Acquired Product in the country or countries as to
which the Product Option is exercised (the "Territory"). BioChem may exercise
the Product Option with respect to any CliniChem Product on a country-by-country
basis at any time until (i) with respect to the United States, 30 days after FDA
clearance to market such CliniChem Product in the United States and (ii) with
respect to any other countries, 30 days after the clearance by the appropriate
regulatory agency to commercially market such CliniChem Product in such country.
The Product Option will expire, to the extent not previously exercised, 30 days
after the expiration of the Purchase Option. BioChem must exercise the Product
Option for any country prior to the date of the first commercial sale of the
CliniChem Product in such country.
 
     If BioChem exercises the Product Option for a CliniChem Product, BioChem
will be required to use diligent efforts to complete the research and
development of and to commercialize such Acquired Product in each Major Market
Country in which the Product Option has been exercised. BioChem will devote to
its commercialization efforts the same resources as other biopharmaceutical
companies of similar size devote to
 
                                       53
<PAGE>   55
 
products with similar market potential and similar relative importance in their
product portfolios and may use reasonable discretion in allocation of its
resources in performing such obligations.
 
     BioChem will make Product Payments to CliniChem with respect to each
Acquired Product. Such payments will be a percentage of Net Sales and Licenses
Revenue. It is common for biopharmaceutical companies to enter into marketing
agreements, which provide that the marketing partner pay a percentage of its
sales and/or up front payments to the biopharmaceutical company. If BioChem
exercises the Product Option, it may enter into such agreements and receive such
payments. Such payments would be included in the definition of "Licensing
Revenues." See "Glossary." Such payments will range from 1 to 6% of Net Sales
and from 10 to 25% of Licensing Revenues, calculated as follows: (a) royalties
of up to a maximum of 6% of Net Sales of the Acquired Product determined as
follows: (i) 1% of such Net Sales, plus (ii) an additional 0.1% of such Net
Sales for each full $1 million of Research and Development Costs of the Acquired
Product paid by CliniChem at the time BioChem exercised the Product Option with
respect to such Acquired Products; plus (b) licensing fees of up to a maximum of
25% of Licensing Revenues with respect to such Acquired Product determined as
follows: (i) 10% of such Licensing Revenues, plus (ii) and additional 1% of
Licensing Revenues for each full $1 million of Research and Development Cost of
the Acquired Product paid by CliniChem at the time BioChem exercised the Product
Option with respect to such Acquired Products. Because the marketing expenses
associated with a newly introduced product during the first few years after
launch are generally significantly higher than those for an established product,
the Product Payments will not exceed 3% of Net Sales plus 12.5% of Licensing
Revenues, on a quarterly basis, for the first twelve calendar quarters during
which the Acquired Product is commercially sold in the first Major Market
Country. As a result of this provision, if an Acquired Product were to be
cleared for marketing in a country or countries that are not Major Market
Countries prior to marketing clearance in the first Major Market Country and
Product Payments in such countries would exceed 3% of Net Sales plus 12.5% of
Licensing Revenues (as applicable), the Product Payment rates in such countries
will be reduced to 3% of Net Sales plus 12.5% of Licensing Revenues for the
first twelve calendar quarters during which the Acquired Product is commercially
sold in the first Major Market Country.
 
     In determining the payments due to CliniChem with respect to any Acquired
Product, Net Sales by and Licensing Revenues of BioChem will be reduced by the
amount of any license or similar payments made by or due from BioChem to third
parties with respect to sales of such Acquired Product in the Territory. It is
possible that, to develop the CliniChem Products, additional licenses or other
arrangements with third parties may be necessary or appropriate. Such
arrangements could also require payments by BioChem that would reduce the
Product Payments owed to CliniChem.
 
     Subject to BioChem's buy-out option described below, Product Payments will
commence on the date of the first commercial sale of such Acquired Product in
any country for which the Product Option has been exercised. BioChem will make
such Product Payments, with respect to all countries for which the Product
Option has been exercised, until 10 years after the first commercial sale of the
Acquired Product in the first Major Market Country in which such product is
commercially sold (the "Payment Period").
 
     BioChem has the option to buy out CliniChem's right to receive Product
Payments for any Acquired Product on either a country-by-country or global
basis. A country-specific buy-out option may be exercised for any Acquired
Product at any time after the end of the twelfth calendar quarter following the
date on which the Acquired Product was first commercially sold in such country.
The global buy-out option may be exercised for any Acquired Product, for all
countries for which BioChem has exercised the Product Option, at any time after
the end of the twelfth calendar quarter following the date on which the Acquired
Product was first commercially sold in either the United States or two other
Major Market Countries. The buy-out price for an Acquired Product in the case of
a country-specific buy-out will be 15 times the total amount of Product Payments
for such product made by or due from BioChem to CliniChem with respect to such
Acquired Product in such country for the four calendar quarters immediately
preceding the quarter in which the buy-out option is exercised. The buy-out
price for a global buy-out shall be calculated as if any previous
country-by-country buy-outs have not been made by adding payments which would
have been made had the country-by-country buy-out not occurred into the Product
Payments used to calculate the buy-out price, and subtracting from the buy-out
price the amounts paid by BioChem to exercise the country-by-country
 
                                       54
<PAGE>   56
 
buy-outs. The buy-out price in the case of a global buy-out will be (i) 20 times
(a) the Product Payments made by or due from BioChem to CliniChem with respect
to the Acquired Product, plus (b) such Product Payments as would have been made
by or due from BioChem to CliniChem if BioChem had not exercised any
country-specific buy-out option with respect to such Acquired Product, in each
case for the four calendar quarters immediately preceding the quarter in which
the global buy-out option is exercised, less (ii) any amount previously paid to
exercise any country-specific buy-out option with respect to such Acquired
Product. In either case, the buy-out price will be computed as if Product
Payments were not limited to 3% of Net Sales, plus 12.5% of the Licensing
Revenues (as applicable) during early marketing as described above. At the time
BioChem exercises the global buy-out option for any Acquired Product, the
Product Option for such product will expire for all countries for which it had
not been previously exercised.
 
     If BioChem exercises the Product Option for any CliniChem Product, BioChem
will continue to own and have the right to use any clinical supplies, materials
and other tangible assets purchased, manufactured or developed for use
exclusively in the development of such CliniChem Product under approved work
plans and cost estimates (the "Development Assets"), without any additional
payment to or reimbursement of CliniChem. To the extent BioChem does not
exercise the Product Option for any CliniChem Product prior to its expiration,
or to the extent BioChem notifies CliniChem that it will not exercise its
Product Option for any CliniChem Product, BioChem must make Development Assets
exclusively relating to such CliniChem Product available to CliniChem at no
charge to the extent such assets are being used by CliniChem and will not be
used under the Research and Development Agreement.
 
     During the Payment Period for an Acquired Product, BioChem will provide
quarterly reports to CliniChem detailing payments due for such period with
respect to the Acquired Product. Such reports will be due 90 days after the end
of each calendar quarter and will indicate the quantity and dollar amount of Net
Sales of or Licensing Revenue relating to the Acquired Product, or other
consideration in respect of Net Sales, during the quarter covered by such
report. No more than once in each calendar year upon reasonable notice and
during regular business hours, at CliniChem's expense, BioChem is required to
make available for inspection by the auditors of CliniChem such records of
BioChem as may be necessary to verify the accuracy of reports and payments made
under the Product Option Agreement.
 
     To the extent BioChem does not exercise the Product Option with respect to
any CliniChem Product, CliniChem will retain exclusive rights (subject to
pre-existing third-party rights and subject to receipt of certain third-party
consents) to develop and commercialize such CliniChem Product.
 
PURCHASE OPTION
 
     The Purchase Option is set forth in CliniChem's Articles. Pursuant to the
Purchase Option, BioChem, as the holder of all the majority of the outstanding
Class B Shares, has the right to acquire all, but not less than all, of the
issued and outstanding CliniChem Common Shares. The Purchase Option will be
exercisable by written notice given at any time from and after the Distribution
Date and ending on the earlier of (i) March 31, 2003 or (ii) the 90(th) day
after the date CliniChem provides BioChem (as the holder of the majority of the
outstanding Class B Shares) with quarterly financial statements of CliniChem
showing cash or cash equivalents of less than $5.0 million, although BioChem
may, at its election, extend such period by providing additional funding,
including through loans, for the continued conduct of any or all of the
CliniChem Programs (but in no event beyond March 31, 2003). All certificates
evidencing CliniChem Common Shares will bear a legend indicating that such
CliniChem Common Shares are subject to the Purchase Option.
 
     If the Purchase Option is exercised, the Purchase Option Exercise Price
will be the greatest of:
 
     (a)  (i) 25 times the aggregate of (a) all worldwide payments made by and
all worldwide payments due to be made by BioChem to CliniChem with respect to
all Acquired Products for the four calendar quarters immediately preceding the
quarter in which the Purchase Option is exercised (the "Base Period") and (b)
all payments that would have been made and all payments due to be made by
BioChem to CliniChem during the Base Period if BioChem had not previously
exercised its Payment Buy-Out Option with respect to any product; less (ii) any
amounts previously paid to exercise any payment buy-out option for any CliniChem
Product;
 
                                       55
<PAGE>   57
 
     (b)  the fair market value of 420,000 BioChem Common Shares determined as
of the date BioChem provides notice of its intention to exercise its Purchase
Option;
 
     (c)  $175 million plus any additional funds contributed to CliniChem by
BioChem less the aggregate amount of all Technology Fee payments, Research and
Development Costs and Services Agreements payments paid or incurred by CliniChem
as of the date the Purchase Option is exercised; and
 
     (d)  $50 million.
 
     In each case, the amount payable as the Purchase Option Exercise Price will
be reduced (but not to less than $1.00) to the extent, if any, that CliniChem's
liabilities at the time of exercise (other than liabilities under the Research
and Development Agreement, the Services Agreement and the Technology License
Agreement and any debt owed to BioChem) exceed CliniChem's cash and cash
equivalents and short-term and long-term investments (excluding the amount of
Available Funds remaining at such time). For this purpose, liabilities will
include, in addition to liabilities required to be reflected on CliniChem's
financial statements under generally accepted accounting principles, certain
contingent liabilities relating to guarantees and similar arrangements.
 
     BioChem may pay the Purchase Option Exercise Price in cash, in BioChem
Common Shares, or in any combination of cash and BioChem Common Shares. For the
purpose of determining either the Purchase Option Exercise Price or the fair
market value of the BioChem Common Shares to be issued in payment thereof, the
fair market value of BioChem Common Shares shall be deemed to be the average of
the closing sales price of BioChem Common Shares on the Nasdaq converted to
Canadian dollars using the noon buying rate in New York City for cable transfers
in foreign currencies as certified for customs purposes by the Federal Reserve
Bank of New York for the day on which each such closing sales price occurred for
the 20 trading days ending with the trading day that is two trading days prior
to the date of exercise of the Purchase Option.
 
     The closing of the acquisition of the CliniChem Common Shares pursuant to
exercise of the Purchase Option will take place on a date selected by BioChem,
but no later than 60 days after the exercise of the Purchase Option unless, in
the judgment of BioChem, a later date is required to satisfy any applicable
legal requirements or to obtain required consents. Between the time of exercise
of the Purchase Option and the time of closing of the acquisition of the
CliniChem Common Shares, CliniChem may not, without BioChem's consent as the
holder of the majority of the outstanding Class B Shares, incur additional debt,
dispose of assets, pay or declare any dividends or operate its business other
than in the ordinary course.
 
     In the event that prior to BioChem's exercise of the Purchase Option, the
number of outstanding BioChem Common Shares is increased by virtue of a stock
split or a dividend payable in BioChem Common Shares or the number of such
shares is decreased by virtue of a combination or reclassification of such
shares, then the number of BioChem Common Shares used to compute the Purchase
Option Exercise Price (if the Purchase Option Exercise Price is the fair market
value of 420,000 shares of BioChem Common Shares) shall be increased or
decreased, as the case may be, in proportion to such increase or decrease in the
number of outstanding BioChem Common Shares.
 
   
     To the extent Rule 13e-3 under the Exchange Act dealing with going private
transactions by certain issuers or their affiliates is applicable at the time of
any exercise of the Purchase Option, BioChem and CliniChem will comply with
their respective obligations under Rule 13e-3, subject to any available
exemptions from such obligations.
    
 
DISTRIBUTION AGREEMENT
 
     Under the Distribution Agreement, BioChem will contribute $150 million in
cash to CliniChem as a capital contribution and will subsequently distribute the
CliniChem Common Shares to the Holders. Under the Distribution Agreement,
BioChem has agreed to indemnify CliniChem's officers and directors to the same
extent such persons are entitled to indemnification under CliniChem's By-laws if
BioChem exercises the Purchase Option.
 
                                       56
<PAGE>   58
 
SERVICES AGREEMENT
 
     CliniChem and BioChem have entered into a Services Agreement pursuant to
which BioChem has agreed to provide CliniChem with administrative services,
including accounting and legal services, and other services for an annual fee of
$400,000.
 
     The Services Agreement expires six months after the expiration of the
Purchase Option. CliniChem may terminate the Services Agreement at any time upon
60 days' written notice.
 
THIRD-PARTY CONSENTS AND RIGHTS
 
     Certain of the CliniChem Products are subject to existing third-party
rights, or would require the consent of a third party in order for BioChem to
sublicense certain rights to CliniChem. Under the Technology License Agreement,
BioChem is obligated, in certain circumstances, to use commercially reasonable
efforts to obtain such consents. See "The Agreements and the Purchase
Option--Technology License Agreement."
 
     Under the UGARF Agreement, BioChem has obtained a license to certain
patents and know-how related to the use of BCH-4556 for the treatment of cancer.
The UGARF Agreement is silent as to whether BioChem may grant sublicenses to
commercialize under these patents and know-how without the licensors' consent.
It may be necessary for CliniChem to obtain a license to such patents and
know-how to CliniChem, or for BioChem to obtain the consent of the licensors to
grant a sublicense to CliniChem, prior to commercializing BCH-4556 for the
treatment of cancer. See "Risk Factors."
 
     Under a collaboration agreement between BioChem and ANP, ANP has agreed to
screen compounds in the a(n)b(3) assays for biological activity. Under this
agreement, ANP will be granted an exclusive license in Australia and New Zealand
to any product developed for human health care which results from such
screening. CliniChem will not possess any rights to any product developed for
human health care resulting from such screening in Australia and New Zealand.
 
     BioChem has entered into certain research agreements and licensing
agreements which provide third parties non-exclusive rights to use certain
existing or future technology for research purposes. CliniChem's license is
subject to such rights.
 
     Prior to CliniChem's commercialization of any vaccine incorporating the
adjuvants or biovectors licensed to BioChem pursuant to the Pharmadigm or
Biovector Agreements, it may be necessary for BioChem to obtain the consent of
Pharmadigm or Biovector to grant a sublicense to CliniChem or for CliniChem to
obtain an independent license from Pharmadigm or Biovector for such adjuvants or
biovectors. See "Risk Factors."
 
     Patheon Inc. holds a conditional right of first refusal to bid on the
commercial manufacturing of BCH-10652 in dosage form under a pre-existing
agreement. CliniChem's license to manufacture BCH-10652 will be subject to
Patheon's right of first refusal.
 
                           INCOME TAX CONSIDERATIONS
 
CANADIAN FEDERAL INCOME TAX CONSIDERATIONS
 
     In the opinion of Stikeman, Elliott, Canadian counsel to CliniChem, the
following are the principal Canadian federal income tax considerations generally
applicable to Holders who receive a dividend in the form of the CliniChem Common
Shares and who, at all relevant times, for purposes of the Income Tax Act
(Canada) the ("Tax Act"), hold the BioChem Common Shares, and will hold the
CliniChem Common Shares, as capital property and deal with each of BioChem and
CliniChem at arm's length. BioChem Common Shares and CliniChem Common Shares
will generally constitute capital property to a holder unless the holder holds
such shares in the course of carrying on a business or the holder has acquired
such shares in a transaction or transactions considered to be an adventure in
the nature of trade. This discussion is based on the current provisions of the
Tax Act, the regulations thereunder, counsel's understanding of current
administrative and assessing policies of Revenue Canada and all specific
proposals to amend the Tax Act publicly announced or released by or on behalf of
the Minister of Finance (Canada) before the date of this prospectus ("Tax
Proposals").
 
                                       57
<PAGE>   59
 
     The Tax Act contains certain provisions relating to securities held by
certain financial institutions (the "Mark-to-Market Rules"). This discussion
does not take into account these Mark-to-Market Rules or any amendments thereto
contained in the Tax Proposals and taxpayers that are "financial institutions"
for purposes of those rules should consult their own tax advisors.
 
     This discussion is not exhaustive of all possible Canadian federal income
tax considerations and, except for the Tax Proposals, does not take into account
or anticipate any changes in law, whether by legislative, governmental or
judicial action, nor does it take into account tax legislation of any province,
territory or foreign jurisdiction. This discussion is of a general nature only
and is not intended to be, nor should it be construed as, legal or tax advice to
any particular holder of BioChem Common Shares and CliniChem Common Shares.
 
     RESIDENTS
 
     The following discussion is relevant to a holder of BioChem Common Shares
and CliniChem Common Shares who, for purposes of the Tax Act and any applicable
tax treaty or convention, is resident in Canada at all relevant times.
 
     CliniChem Common Shares
 
     The distribution of the CliniChem Common Shares as a dividend-in-kind will
be a taxable dividend to Holders. The amount of that dividend will be equal to
the fair market value of the CliniChem Common Shares at the time of payment.
Where the Holder is an individual, the amount of the dividend will be subject to
the gross-up and dividend tax credit rules normally applicable to dividends
received from taxable Canadian corporations. Subject to the potential
application of subsection 55(2) discussed below, where the Holder is a
corporation, the dividend will be included in computing its income and generally
will be deductible in computing taxable income. Private corporations and certain
other corporations controlled by or for the benefit of an individual or a
related group of individuals generally will be liable for the refundable tax on
dividends under Part IV of the Tax Act levied at a rate of 33 1/3%. In certain
circumstances, subsection 55(2) treats a dividend (other than a dividend subject
to Part IV tax that is not refunded as part of the same series of transactions)
received by a corporation as proceeds of disposition or a capital gain. Although
counsel does not believe subsection 55(2) should apply to the dividend of the
CliniChem Common Shares, corporate shareholders should consult their own tax
advisers with respect to the potential application of subsection 55(2) to that
dividend. CliniChem Common Shares received by a Holder will have a cost to the
holder for tax purposes equal to their fair market value at the time of payment.
 
     On a disposition or deemed disposition of a CliniChem Common Share, the
Holder will realize a capital gain (or capital loss) equal to the amount by
which the proceeds of disposition for the CliniChem Common Share exceed (or are
less than) the aggregate of any costs of disposition and the adjusted cost base
to the holder of the CliniChem Common Share immediately before the disposition.
 
     Tax Treatment of Capital Gains and Capital Losses
 
     A holder of CliniChem Common Shares will be required to include in income
three-quarters of the amount of any capital gain (a "Taxable capital gain") and
may deduct three-quarters of the amount of any capital loss (an "Allowable
capital loss") against Taxable capital gains realized by the holder in the year
of the disposition. Allowable capital losses in excess of Taxable capital gains
may be carried back and deducted in any of the three preceding years or carried
forward and deducted in any following year against taxable capital gains
realized in such years to the extent and under the circumstances described in
the Tax Act.
 
     A Canadian-controlled private corporation will also be subject to a
refundable tax of 6 2/3% on taxable capital gains realized on the disposition of
CliniChem Common Shares that will be refunded when the corporation pays taxable
dividends (at a rate of $1.00 for every $3.00 of taxable dividend paid).
 
     In the case of a holder of CliniChem Common Shares that is a corporation,
the amount of any capital loss otherwise determined resulting from the
disposition of a CliniChem Common Share may be reduced by the amount of
dividends previously received or deemed to have been received thereon. Any such
restriction will not occur where the corporate holder owned the CliniChem Common
Share for 365 days or longer and such holder (together with any persons with
whom it did not deal at arm's length) did not own more than 5% of the
 
                                       58
<PAGE>   60
 
shares of any class or series of CliniChem at the time the relevant dividends
were received or deemed to have been received. Analogous rules apply where a
corporation is a member of a partnership or a beneficiary of a trust which owns
CliniChem Common Shares.
 
     NON-RESIDENTS
 
     The following discussion is relevant to a holder of BioChem Common Shares
and CliniChem Common Shares, who, at all relevant times, for purposes of the Tax
Act and any applicable tax treaty or convention, is a non-resident or is deemed
to be a non-resident of Canada and does not use and is not deemed to use or hold
BioChem Common Shares and CliniChem Common Shares in the course of carrying on a
business in Canada. Special rules, which are not discussed below, may apply to a
non-resident that is an insurer which carries on business in Canada and
elsewhere.
 
     CliniChem Common Shares
 
     A non-resident Holder who receives CliniChem Common Shares as a
dividend-in-kind will be considered as having received a dividend equal to the
fair market value of the CliniChem Common Shares on the date of payment. Under
the Tax Act, dividends paid or credited to a non-resident are subject to
withholding tax at the rate of 25% of the gross amount of the dividends. This
withholding tax may be reduced or eliminated pursuant to the terms of an
applicable tax treaty between Canada and the country of residence of the
non-resident. For example, for persons who are resident in the United States for
purposes of the Canada-United States Income Tax Convention, (the "Convention")
the rate of withholding tax on dividends is reduced to 15% generally and 5% when
the United States resident is a company that beneficially owns at least 10% of
the voting stock of the company paying the dividends. See "The Distribution" as
to how the withholding obligation will be satisfied.
 
     Under the Convention, dividends paid to certain religious, scientific,
charitable and other similar tax-exempt organisations and certain organisations
that are resident in, and exempt from tax in, the United States are exempt from
Canadian non-resident withholding tax. Provided that certain administrative
procedures designed to establish with the Canadian tax authorities the right of
such entities to benefit from this withholding tax exemption are complied with
by the tax-exempt entities prior to the Distribution, BioChem would not be
required to withhold such tax on such payment. Alternatively, the above
described tax-exempt entities may claim a refund of Canadian withholding tax
otherwise withheld by Biochem on the Distribution.
 
     The CliniChem Common Shares received by a Holder including any CliniChem
Common Shares sold on behalf of the Holder to pay the Canadian withholding tax
for which the Holder is liable will have a cost to the Holder for Canadian tax
purposes equal to the fair market value of such CliniChem Common Shares on the
date of the dividend. A Holder will be treated as if it had acquired the
CliniChem Common Shares sold on its behalf and had disposed of such shares for
the amount received on their sale. Consequently, such a Holder may realize a
capital gain or capital loss, as discussed below.
 
     On a disposition or deemed disposition of a CliniChem Common Share, a
non-resident holder will realize a capital gain (or capital loss) equal to the
amount by which the proceeds of disposition for the CliniChem Common Share
exceed (or are less than) the aggregate of any costs of disposition and the
adjusted cost base to the non-resident holder of the CliniChem Common Share
immediately before the disposition.
 
     Tax Treatment of Capital Gains
 
     A non-resident of Canada is liable for Canadian income tax on a capital
gain realized on the disposition of property only where that property
constitutes "taxable Canadian property". Three-quarters of any capital gain from
the disposition of taxable Canadian property is subject to Canadian tax.
 
     Under the Tax Act, shares of CliniChem will not constitute taxable Canadian
property unless, at any time, in the five years immediately preceding the
disposition, the non-resident holder, either alone or together with persons with
whom the non-resident does not deal at arm's length, owned (or had a right to
acquire) more than 25% of the shares of any class (or series) of CliniChem. Even
in circumstances where shares of CliniChem are taxable Canadian property to a
non-resident holder, the non-resident holder may be entitled to relief from
Canadian tax on any capital gain realized on the disposition thereof pursuant to
the terms of an
 
                                       59
<PAGE>   61
 
applicable tax treaty between Canada and the country of residence of the
non-resident. For example, the Convention provides that gains realized by a
resident of the United States on the disposition or deemed disposition of shares
of a company will generally not be subject to tax under the Tax Act, provided
that the value of the shares is not derived principally from real property
situated in Canada. CliniChem believes that the value of its shares is not
currently derived principally from real property situated in Canada and it does
not expect this to change in the foreseeable future.
 
     Provided that the CliniChem Common Shares remain listed on a prescribed
stock exchange (including the Montreal Exchange, the Toronto Exchange and the
Nasdaq National Market System), a non-resident holder who disposes of CliniChem
Common Shares will not be required to comply with the Canadian notification
procedures generally applicable to dispositions of taxable Canadian property.
 
     Taxation of Dividends
 
     Dividends paid by CliniChem to a non-resident of Canada will be subject to
Canadian withholding tax at the rate described above under "CliniChem Common
Shares."
 
UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
 
     The following discussion describes certain material United States Federal
income tax consequences to a U.S. Holder of the receipt, ownership and
disposition of CliniChem Common Shares. The discussion is limited to certain
material United States Federal income tax consequences to holders that are
individuals, corporations, estates or trusts, and that hold the CliniChem Common
Shares as capital assets. The discussion does not address the tax consequences
to special categories of investors such as dealers, traders, holders of
securities as part of a synthetic, integrated or derivative investment,
tax-exempt holders, other types of entity or holders which are subject to
special taxation regimes such as banks, real estate investment trusts, regulated
investment companies or insurance companies. The discussion also does not
address United States state and local taxes.
 
     This discussion is based on the Internal Revenue Code of 1986, as amended
(the "Code"), judicial decisions, administrative pronouncements, and existing
and proposed regulations issued by the United States Department of the Treasury
(the "Treasury Department") now in effect, all of which are subject to change,
possibly with retroactive effect. There can be no assurance that the Internal
Revenue Service will take a similar view of the tax consequences of the receipt,
ownership and disposition of the CliniChem Common Shares. U.S. Holders are urged
to consult their own tax advisers concerning the specific United States Federal,
state and local consequences of the receipt, ownership and disposition of the
CliniChem Common Shares given their particular status and circumstances.
 
     The term "U.S. Holder" means a holder of either BioChem Common Shares or
CliniChem Common Shares, as applicable, that is, for United States Federal
income tax purposes, (a) a citizen or resident of the United States, (b) a
corporation, limited liability company, partnership or other entity created or
organized under the laws of the United States or of any political subdivision
thereof, (c) an estate, the income of which is subject to United States Federal
income taxation regardless of source, or (d) a trust, if a court within the
United States is able to exercise primary jurisdiction over its administration
and one or more United States persons have the authority to control all of its
substantial decisions.
 
     CONSEQUENCES OF DISTRIBUTION
 
     The Distribution of CliniChem Common Shares will be taxable to a U.S.
Holder as a dividend to the extent of BioChem's current and accumulated earnings
and profits ("E&P"). A U.S. Holder will not be entitled to a dividends-received
deduction in relation to any part of the Distribution which must be included as
a dividend. Any excess of the value of the CliniChem Common Shares distributed
over BioChem's E&P will be treated as a return of basis in a U.S. Holder's
BioChem Common Shares, and the U.S. Holder's tax basis in the BioChem Common
Shares will be reduced by the amount of such excess. Once a U.S. Holder's tax
basis in the BioChem Common Shares has been reduced to zero, any additional
excess will be taxable to the U.S. Holder as a capital gain, long- or short-term
depending upon whether the U.S. Holder has held the BioChem Common Shares for
more than one year. A U.S. Holder who is an individual will qualify for the
lowest capital gain rate only if such U.S. Holder has held the BioChem Common
Shares for more than
                                       60
<PAGE>   62
 
eighteen months on the date of the Distribution. For purposes of the foregoing
rules, a U.S. Holder will be considered to have received a distribution equal to
the aggregate fair market value on the Distribution Date of the CliniChem Common
Shares actually received plus those withheld to satisfy such U.S. Holder's
Canadian withholding tax liability.
 
     BioChem does not believe it has any accumulated E&P through December 31,
1997. BioChem will not be able to calculate its current E&P until the end of the
current tax year. BioChem will notify the relevant depository agents in early
1999 of the amount, if any, of the Distribution which must be included in the
income of U.S. Holders as a dividend.
 
     The Distribution will be treated as a dividend-in-kind under Canadian tax
law, and consequently will be subject to Canadian withholding tax. See "Income
Tax Considerations--Canadian Federal Tax Considerations." Although such
withholding tax will be creditable under United States Federal tax law, a U.S.
Holder's ability to claim a foreign tax credit against its United States taxes
is subject to several limitations. In particular, a U.S. Holder may only claim a
foreign tax credit against the portion of its United States Federal income tax
liability allocable to foreign source income. Consequently, if some or all of
the Distribution is not taxed as a dividend (because BioChem has insufficient
E&P), a U.S. Holder may not be able to credit the full withholding tax against
its United States tax liability unless it has other foreign source income to
which the foreign withholding tax can be applied.
 
     In order to satisfy a Registered U.S. Holder's liability for the Canadian
withholding tax, a portion of the CliniChem Common Shares otherwise deliverable
to such U.S. Holder will be withheld by the Distribution Agent. Such shares so
withheld will be sold on behalf of such U.S. Holder as is necessary, given the
price actually received and any expenses of sale, to realize sufficient proceeds
to satisfy the Canadian withholding tax liability. A U.S. Holder will recognize
a short-term capital gain or loss on the sale of such withheld shares equal to
the difference between the sale price realized and the sum of the fair value of
the shares on the date of the distribution plus any expenses incurred in
connection with such sale. Any withheld shares remaining unsold after sufficient
proceeds are realized will be distributed to the U.S. Holder. A U.S. Holder will
not recognize any gain or loss upon receipt of such remaining unsold shares.
 
     A U.S. Holder's tax basis in the CliniChem Common Shares (including the
shares withheld to satisfy such U.S. Holder's Canadian withholding tax
liability) will be equal to their value on the Distribution Date. The U.S.
Holder's holding period of the CliniChem Common Shares including such withheld
shares will begin on the Distribution Date.
 
     TAXATION OF CLINICHEM COMMON SHARES
 
     Sale, Exchange or Other Disposition.
 
     Subject to the discussion under "Passive Foreign Investment Company
Considerations" below, a U.S. Holder will recognize capital gain or loss on the
sale or other disposition of a CliniChem Common Share equal to the difference
between the amount received and such U.S. Holder's tax basis in the CliniChem
Common Share. Such gain or loss will be long-term if the U.S. Holder has held
the CliniChem Common Share for more than one year. A U.S. Holder that is an
individual will qualify for the lowest capital gain rate only if such U.S.
Holder has held the CliniChem Common Share for more than 18 months.
 
     Taxation of Dividends.
 
     A U.S. Holder will not be entitled to claim a dividend received deduction
with respect to dividends paid by CliniChem on CliniChem Common Shares.
 
     U.S. Gift and Estate Tax.
 
     An individual U.S. Holder of CliniChem Common Shares will be subject to
U.S. gift and estate taxes with respect to the CliniChem Common Shares in the
same manner and to the same extent as with respect to other types of personal
property.
 
                                       61
<PAGE>   63
 
     PASSIVE FOREIGN INVESTMENT COMPANY CONSIDERATIONS.
 
     A PFIC is any foreign corporation if, after the application of certain
"look-through" rules, (i) at least 75% of its gross income in any taxable year
is "passive income" or (ii) at least 50% of the average value of its assets is
attributable to assets that produce "passive income" or that are held for the
production of "passive income." Whether BioChem or CliniChem is a PFIC in any
year and the tax consequences relating to PFIC status will depend on the
composition of the income of BioChem or CliniChem, as the case may be. This
discussion assumes, and BioChem believes, that BioChem has not been a PFIC for
any prior year and will not be a PFIC during the current year. Because CliniChem
is expected initially to receive the majority of its income from passive
sources, it is expected that CliniChem will initially be a PFIC. If so, a U.S.
Holder receiving CliniChem Common Shares in the Distribution will be subject to
the PFIC taxation rules regardless of whether CliniChem continues to be a PFIC
in any subsequent year. Under the PFIC taxation rules, a U.S. Holder owning
shares of a PFIC is subject to a special United States federal income tax regime
with respect to certain distributions received from the PFIC and with respect to
gain from the sale or disposition of PFIC stock.
 
     If CliniChem is a PFIC for any taxable year during which a U.S. Holder
holds CliniChem Common Shares, unless such U.S. Holder makes the qualified
election described below, such U.S. Holder will generally be subject to various
adverse United States tax consequences. Generally, a direct or indirect U.S.
holder of a PFIC must either (i) elect to have the PFIC treated, with respect to
the holder's shareholding, as a "Qualified Electing Fund" and to report
currently such holder's pro rata share of the PFIC's ordinary earnings and net
capital gain even if such holder does not receive distribution (the "qualified
election"), or (ii) upon disposition of the shares of the PFIC, including a
disposition pursuant to an otherwise tax-free reorganization, or receipt of an
"excess distribution" (generally the amount of each distribution received by the
holder in any year that is greater than its ratable share of 125% of the average
annual distributions received by such holder in the three preceding years or its
holding period, if shorter), be subject generally to tax at the highest
applicable rate or rates of tax imposed on ordinary income as if the gain or
distribution were earned ratably over the period in which the PFIC shares were
held (including payment of an interest charge at the rate equal to the charge
generally applicable to underpayment of tax, on the deferred tax). A shareholder
that makes a qualified election may recognize ordinary income or loss as a
result of currency fluctuations between the dates of deemed and actual
distributions from the PFIC.
 
     The qualified election is made on a shareholder-by-shareholder basis and
can be revoked only with the consent of the Internal Revenue Service. Each
Holder of CliniChem Common Shares should consult with his own tax advisor to
decide whether to make the "qualified election." This election is made by
attaching the shareholder election statement, the PFIC annual information
statement and Form 8621 to such shareholder's timely filed income tax return
with a copy of the shareholder election statement and Form 8621 being sent to
the Internal Revenue Service Center, P.O. Box 21086, Philadelphia, Pennsylvania
19114. CliniChem will supply the PFIC annual information statement to all
shareholders of record for each year. Copies of the Form 8621 must also be filed
every year during which the "qualified election" is outstanding, both with such
shareholder's tax return and with the Internal Revenue Service Center in
Philadelphia.
 
     THE FOREGOING SUMMARY OF CANADA AND UNITED STATES TAX CONSEQUENCES IS BASED
ON THE APPLICABLE INCOME TAX CONVENTION, ESTATE TAX CONVENTION, UNITED STATES
LAW, CANADIAN LAW, AND REGULATIONS, ADMINISTRATIVE RULINGS AND PRACTICES OF THE
UNITED STATES, AND CANADA, ALL AS THEY EXIST AS OF THE DATE OF THIS PROSPECTUS.
THIS SUMMARY DOES NOT DISCUSS ALL ASPECTS THAT MAY BE RELEVANT TO PROSPECTIVE
INVESTORS IN LIGHT OF THEIR PARTICULAR CIRCUMSTANCES. PROSPECTIVE INVESTORS ARE
URGED TO CONSULT THEIR OWN TAX ADVISERS WITH RESPECT TO THEIR OWN PARTICULAR
CIRCUMSTANCES, INCLUDING THE APPLICABILITY AND EFFECT OF PROVINCIAL, STATE,
LOCAL AND FOREIGN TAX LAWS, ESTATE TAX LAWS AND PROPOSED CHANGES IN APPLICABLE
LAWS.
 
                                       62
<PAGE>   64
 
                    EXCHANGE CONTROLS AND OTHER LIMITATIONS
                           AFFECTING SECURITY HOLDERS
 
     There are currently no limitations imposed by Canadian federal of
provincial laws on the rights of non-resident or foreign owners of Canadian
securities to hold or vote the securities held. There are also no such
limitations imposed by the Articles and the By-laws with respect to the
CliniChem Common Shares.
 
                    DESCRIPTION OF CLINICHEM'S SHARE CAPITAL
 
     The authorized share capital of CliniChem consists of an unlimited number
of CliniChem Common Shares and 1,000 Class B Shares. As of the date of this
Prospectus, there were        CliniChem Common Shares outstanding and 1,000
Class B Shares outstanding.
 
CLINICHEM COMMON SHARES
 
     Holders of CliniChem Common Shares are entitled to one vote for each share
held on all matters submitted to a vote of shareholders, except matters
submitted to the consent or the vote of the holders of a majority of the
outstanding Class B Shares. Holders of CliniChem Common Shares do not have
cumulative voting rights. Holders of CliniChem Common Shares are entitled to
receive such dividends, if any, as may be declared by the Board of Directors of
CliniChem out of funds legally available therefor. It is expected that CliniChem
will not pay dividends on the CliniChem Common Shares. Upon the liquidation,
dissolution or winding up of CliniChem, the holders of CliniChem Common Shares
are entitled to receive the assets of CliniChem on a pro rata basis. In the
event of the liquidation, dissolution or winding up of CliniChem, the Class B
Shares shall have priority over the CliniChem Common Shares with respect to
return of capital. Holders of CliniChem Common Shares have no preemptive,
subscription, redemption or conversion rights.
 
     The rights of the holders of CliniChem Common Shares are subject to the
rights of the holders of any Class B Shares which are currently, or may in the
future, be issued.
 
     All of the CliniChem Common Shares will be subject to the Purchase Option
whereby the holder of the majority of the outstanding Class B Shares can require
holders of the CliniChem Common Shares to sell their CliniChem Common Shares to
the holder of the majority of the outstanding Class B Shares at the Purchase
Option Exercise Price. The decision to exercise the Purchase Option by the
holder of the majority of the outstanding Class B Shares will depend on the
circumstances prevailing at the time consideration is given to its exercise and
will be based on a number of factors which are currently unknown, including the
extent to which CliniChem is successful in pursuing the CliniChem Programs and
whether or not the CliniChem Programs will fit such holder's business strategies
at that time. The Class B Shares are freely transferable. Any subsequent holder
of a majority of the outstanding Class B Shares may not possess the financial
resources necessary to exercise the Purchase Option and may be unable or
unwilling to register securities issued by it upon exercise of the Purchase
Option in exchange for the CliniChem Common Shares.
 
CLASS B SHARES
 
     All the currently issued and outstanding Class B Shares are held by
BioChem. Holders of Class B Shares are entitled to one vote for each share held
on all matters submitted to a vote of shareholders. Holders of the majority of
the outstanding Class B Shares are entitled to elect one director. Holders of
Class B Shares do not have cumulative voting rights. Holders of Class B Shares
are entitled to receive such dividends, if any, as may be declared by the Board
of Directors of CliniChem out of funds legally available therefor. In the event
of the liquidation, dissolution or winding up of CliniChem, the Class B Shares
shall be entitled to receive, in preference and priority over the CliniChem
Common Shares, an amount equal to the consideration received by ClinChem upon
the issuance of the Class B Shares. CliniChem does not presently intend to issue
additional Class B Shares. The holders of a majority of the issued and
outstanding Class B Shares have, upon certain conditions, an option to purchase
all, but not less than all, of the CliniChem Common Shares issued and
outstanding. See "The Agreements and the Purchase Options--Purchase Option."
 
     Until the exercise or the expiration of the Purchase Option, CliniChem may
not authorize or permit, without the prior written approval of the holders of a
majority of the outstanding Class B Shares, any amalgamation or liquidation of
CliniChem, and any amendments to the CliniChem Articles that would alter
 
                                       63
<PAGE>   65
 
the Purchase Option, CliniChem's authorized capitalization, or the provisions of
the CliniChem Articles governing the right of the holders of the majority of the
outstanding Class B Shares to elect one director. See "The Agreements and the
Purchase Options--Purchase Option", "Risk Factors--Relationship Between
CliniChem and BioChem May Limit CliniChem's Activities and Market Value."
 
     Thus BioChem, as the holder of a majority of the outstanding Class B
Shares, could preclude the holders of a majority of the outstanding CliniChem
Common Shares and the Board of Directors of CliniChem from taking any of the
foregoing actions during such period. In addition, until the expiration of the
Purchase Option, any resolution to liquidate, dissolve or wind up CliniChem will
confer upon the holders of the Class B Shares a right to vote and such Class B
Shares will carry a number of votes equal to the total number of votes carried
by the CliniChem Common Shares at the time outstanding.
 
SHAREHOLDER MEETINGS
 
     Under applicable Canadian securities legislation and the CBCA, a meeting of
the shareholders of a company must be convened at least once every calendar
year. Meetings of shareholders of CliniChem shall be held at the place within
Canada provided in the By-laws of CliniChem or, in the absence of such
provision, at the place within Canada that the directors determine. Notice of
all general and special meetings of the shareholders of CliniChem must be
furnished to shareholders entitled to vote thereat, specifying the place, the
day and the hour of the meeting and the general nature of the business to be
considered.
 
NUMBER OF DIRECTORS; RESIDENCY REQUIREMENTS; VACANCIES; REMOVAL
 
     CliniChem's Articles provide that there shall be a minimum of three
directors and a maximum of 15 directors. See "Business of CliniChem--Executive
Officers and Directors." The exact number of directors is fixed by the Board of
Directors, subject to the requirement of the CBCA that CliniChem have a minimum
of three directors, at least two of whom are not officers or employees of
CliniChem or its affiliates. The CBCA provides that a majority of the directors
of a corporation must be Canadian residents, defined to include Canadian
citizens and permanent residents ordinarily resident in Canada.
 
     The CBCA provides that a vacancy on the Board of Directors may be filled by
a quorum of directors, except for a vacancy resulting from an increase in the
number or minimum number of directors or from a failure to elect the number or
minimum number of directors required by the Articles. In the event of a vacancy
of the director to be elected by the holders of the majority of the outstanding
Class B Shares, the Articles provide that such a vacancy shall only be filled by
a vote of the majority of the holders of the outstanding Class B Shares.
 
     The directors of a CBCA corporation may be removed from office by a
resolution passed by a majority of the votes cast at a special meeting of
shareholders, subject to applicable class voting rights.
 
LIMITATIONS ON LIABILITY OF OFFICERS AND DIRECTORS
 
     The CBCA provides that a corporation may indemnify, and CliniChem's By-laws
provide that CliniChem shall indemnify, in each case except in respect of an
action by or on behalf of CliniChem or a body corporate of which CliniChem is or
was a shareholder or creditor to procure a judgment in its favor, an officer or
director of CliniChem, a former officer or director of CliniChem or a person who
acts or acted at CliniChem's request as a director or officer of a body
corporate of which CliniChem is or was a shareholder or creditor, and his heirs
and legal representatives, against all costs, charges and expenses, including an
amount paid to settle an action or satisfy a judgment, reasonably incurred by
him in respect of any civil, criminal or administrative action or proceeding to
which he is made a party by reason of his being or having been a director or
officer of CliniChem or such body corporate, if he acted honestly and in good
faith with a view to the best interests of CliniChem, and, in the case of a
criminal or administrative action or proceeding that is endorsed by a monetary
penalty, he had reasonable grounds for believing that his conduct was lawful.
 
AMENDMENT OF CERTAIN PROVISIONS OF THE ARTICLES; FUNDAMENTAL CHANGES
 
     In accordance with the provisions of the CBCA, an amendment to the Articles
of
CliniChem (except in limited circumstances) and the amalgamation or dissolution
of CliniChem
 
                                       64
<PAGE>   66
 
will require the approval of the holders of the majority of the outstanding
Class B Shares and the approval of not less than two-thirds of the votes cast by
the shareholders voting in person or by proxy at a special meeting of the
shareholders of CliniChem. The By-laws of CliniChem provide that one person
present and holding or representing by proxy at least one issued voting share of
CliniChem shall be a quorum of any meeting of shareholders for the choice of a
chairman of the meeting and for the adjournment of the meeting; for all other
purposes a quorum for any meeting shall be persons present being not less that
two in number and holding or representing by proxy at least one-third of the
shares entitled to vote at such meeting.
 
DIRECTORS' INTERESTS
 
     Subject to the provisions of the CBCA, a director or officer of CliniChem
may, notwithstanding his office, be a party to or otherwise interested in any
transaction or arrangement with CliniChem or in which CliniChem is otherwise
interested; and be a director or officer of, or employed by, or a party to any
transaction or arrangement with, or otherwise interested in, any body corporate
promoted by CliniChem or in which CliniChem is interested. So long as a director
or officer of CliniChem who is a party to a material contract or proposed
material contract with CliniChem, or is a director or an officer or has a
material interest in any person who is a party to a material contract or
proposed material contract with CliniChem, such director shall disclose in
writing to CliniChem or request to have entered in the minutes of meetings of
directors the nature and extent of his interest. A general notice to the
directors of CliniChem by a director or officer, declaring that he is a director
or officer of or has a material interest in a person and is to be regarded as
interested in any contract made with that person, is a sufficient declaration of
interest in relation to any contract so made. Except in certain cases, a
director shall not vote on any resolution to approve such contract.
 
     A material contract between CliniChem and one of or more of its directors
and officers, or between CliniChem and another person of which a director or
officer of CliniChem is a director or officer or in which he has a material
interest, is neither void or voidable by reason only of that relationship or by
reason only that a director with an interest in the contract is present at or is
counted to determine the presence of a quorum at a meeting of directors or
committee of directors that authorized the contract, if the director or officer
disclosed his interest in accordance with the provisions of the CBCA and the
contract was approved by the directors or the shareholders and it was reasonable
and fair to CliniChem at the time it was approved. Where a director or officer
of CliniChem fails to disclose his interest in a material contract in accordance
with the CBCA, a court may, on the application of CliniChem or a shareholder of
CliniChem, set aside the contract on such terms as it thinks fit.
 
SHAREHOLDERS' ACTIONS
 
     If on an application by a shareholder of CliniChem to a court, the court is
satisfied that in respect of CliniChem or any of its affiliates, any act or
omission of CliniChem or any of its affiliates effects a result, the business or
affairs of CliniChem or any of its affiliates are or have been carried on or
conducted in a manner, or the powers of the directors of CliniChem or any of its
affiliates are or have been exercised in a manner that is oppressive or unfairly
prejudicial to or that unfairly disregards the interests of any security holder,
creditor, director or officer, the court may make an order to rectify the
matters complained of.
 
                     DESCRIPTION OF BIOCHEM'S SHARE CAPITAL
 
     BioChem's authorized share capital consists of an unlimited number of
BioChem Common Shares with no par value, of which 108,258,990 were issued and
outstanding as of January 31, 1998.
 
BIOCHEM COMMON SHARES
 
     Each BioChem Common Share entitles its holder to one vote at all meetings
of shareholders of BioChem. Subject to any declarations of dividends, holders of
BioChem Common Shares are entitled to receive all dividends as and when declared
by the Board of Directors of BioChem. Upon liquidation or dissolution of
BioChem, holders of BioChem Common Shares shall ratably share the property of
BioChem remaining after payment of all liabilities and debts. There are no
preventive, redemption, purchase or conversion rights attached to the BioChem
Common Shares except as provided by law.
 
                                       65
<PAGE>   67
 
AMENDMENT OF CERTAIN PROVISIONS OF THE ARTICLES
 
     In accordance with the provisions of the CBCA, an amendment to the Articles
of BioChem (except in limited circumstances) and the amalgamation or dissolution
of BioChem will require the approval of not less than two-thirds of the votes
cast by the shareholders voting in person or by proxy at a special meeting of
the shareholders of BioChem. The By-laws of BioChem provide that one person
present and holding or representing by proxy at least one issued voting share of
BioChem shall be a quorum of any meeting of shareholders for the choice of a
chairman of the meeting and for the adjournment of the meeting; for all other
purposes, a quorum for any meeting (unless a different number of shareholders
and/ or a different number of shares are required to be represented by the CBCA
or by the Articles or By-laws of BioChem) shall be persons present being not
less than two (2) in number and holding or representing by proxy at least ten
percent (10%) of the shares entitled to vote at such meeting.
 
                                 LEGAL MATTERS
 
     The statements included in this Prospectus under the caption "Income Tax
Considerations-United States Federal Income Tax Considerations" have been
reviewed by Kirkland & Ellis, New York, CliniChem's United States counsel. The
statements included in this Prospectus under the caption "Income Tax
Considerations--Canadian Federal Income Tax Considerations", and certain other
legal matters relating to the Distribution have been passed upon by Stikeman,
Elliott, Montreal, CliniChem's Canadian Counsel. The Honorable James A. Grant,
P.C., Q.C., a partner of Stikeman, Elliott, is a director of BioChem.
 
                                    EXPERTS
 
     The balance sheet of CliniChem Development Inc. as of February 6, 1998 has
been included herein and in the Registration Statement in reliance upon the
report of Ernst & Young, independent chartered accountants, appearing elsewhere
herein, and upon the authority of said firm as experts in accounting and
auditing.
 
                               MATERIAL CONTRACTS
 
     Other than the contracts described under "The Agreements and the Purchase
Option", there is no material contract entered into by CliniChem prior to the
date hereof, other than in the ordinary course of business.
 
     Copies of the foregoing agreements may be inspected at the registered
office of CliniChem at normal business hours during the period of distribution
of the CliniChem Common Shares offered by this Prospectus and for a period of 30
days thereafter.
 
                                    PROMOTER
 
     BioChem has taken the initiative in organizing the business of CliniChem
and accordingly may be considered to be a promoter of CliniChem under applicable
Canadian securities legislation.
 
                     AUDITORS, TRANSFER AGENT AND REGISTRAR
 
     The auditors of CliniChem are Ernst & Young, Chartered Accountants,
Montreal.
 
     The transfer agent and registrar for the CliniChem Common Shares is General
Trust of Canada at its principal offices in Montreal and Toronto.
 
                          PURCHASERS' STATUTORY RIGHTS
 
     Securities legislation in several of the provinces of Canada provides
purchasers with the right to withdraw from an agreement to purchase securities
within two business days after receipt or deemed receipt of a prospectus and any
amendment. In several of the provinces and territories, securities legislation
further provide a purchaser with remedies for rescission or, in some
jurisdictions, damages where the prospectus and any amendment contains a
misrepresentation or is not delivered to the purchaser, provided that such
remedies for rescission or damages are exercised by the purchaser within the
time limit prescribed by the securities legislation of the purchaser's province
or territory. The purchaser should refer to any applicable provisions of the
securities legislation of his province or territory for the particulars of these
rights or consult with a legal adviser.
 
                                       66
<PAGE>   68
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                               <C>
                                                                  PAGE
Report of Ernst & Young, Chartered Accountants..............       F-2
CliniChem Development Inc. Balance Sheet....................       F-3
Notes to CliniChem Development Inc. Balance Sheet...........       F-4
CliniChem Development Inc. Pro Forma Balance Sheet..........       F-5
</TABLE>
 
                                       F-1
<PAGE>   69
 
                 REPORT OF ERNST & YOUNG, CHARTERED ACCOUNTANTS
 
To the Directors of CliniChem Development Inc.
 
     We have audited the balance sheet of CliniChem Development Inc. as at
February 6, 1998. This balance sheet is the responsibility of the Company's
management. Our responsibility is to express an opinion on this balance sheet
based on our audit.
 
     We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance whether the balance sheet is free of material misstatement.
An audit includes examining, on a test basis, evidence supporting the amounts
and disclosures in the balance sheet. An audit also includes assessing the
accounting principles used and significant estimates made by management, as well
as evaluating the overall balance sheet presentation.
 
     In our opinion, this balance sheet presents fairly, in all material
respects, the financial position of the Company as at February 6, 1998, in
accordance with accounting principles generally accepted in Canada.
 
Montreal, Canada  (signed) Ernst & Young
February 6, 1998                                         Chartered Accountants
 
                                       F-2
<PAGE>   70
 
                           CLINICHEM DEVELOPMENT INC.
 
                                 BALANCE SHEET
                             AS AT FEBRUARY 6, 1998
 
                             (In Canadian dollars)
 
                                     ASSETS
 
<TABLE>
<S>                                                             <C>
Cash........................................................    $1,000
                                                                ------
Total assets................................................    $1,000
                                                                ======
 
                         SHAREHOLDER'S EQUITY
Total shareholder's equity [note 2].........................    $1,000
                                                                ======
</TABLE>
 
Approved on behalf of the board of directors:
 
                          (signed) Frederick J. Andrew
 
                           (signed) Francois Legault
 
                  See Accompanying Notes to the Balance Sheet.
                                       F-3
<PAGE>   71
 
                           CLINICHEM DEVELOPMENT INC.
 
                             NOTES TO BALANCE SHEET
 
1.  INCORPORATION
 
    CliniChem Development Inc. ("CliniChem" or the "Company") was incorporated
    by articles of incorporation under the Canada Business Corporations Act by
    BioChem Pharma Inc. ("BioChem") on January 30, 1998, to conduct research and
    development of potential human therapeutic and vaccine products primarily
    for the treatment of cancer and HIV infection and the prevention of certain
    infectious diseases. CliniChem has not conducted any business to date and
    its only activity to date has been the initial funding provided by BioChem,
    which owns all of the Company's outstanding Common Shares. Accordingly, no
    statement of income is presented.
 
    CliniChem prepares its financial statements in accordance with accounting
    principles generally accepted in Canada which conform in all material
    respects with generally accepted accounting principles in the United States,
    except as explained below in note 4.
 
2.  SHARE CAPITAL
 
<TABLE>
<CAPTION>
                                                                  NUMBER     $
                                                                  ------   -----
    <S>                                                           <C>      <C>
    Unlimited number of shares authorized; issued and
      outstanding:
      Common Shares.............................................  1,000    1,000
      As of January 1998, CliniChem is a wholly-owned subsidiary
      of BioChem.
</TABLE>
 
    Prior to the closing of the Distribution contemplated by the Prospectus, of
    which this Balance Sheet is a part, the Company intends to file articles of
    amendment to provide for Class A Common Shares and Class B Common Shares.
    The common shareholders of BioChem will receive one CliniChem Class A Common
    Share for each 40 BioChem Common Shares held on the Record Date. The
    Company's Common Shares owned by BioChem on the date on which the articles
    of amendment are filed will be converted into 2,706,475 Class A Common
    Shares and into 1,000 Class B Common Shares. In addition, BioChem will
    contribute $150 million in cash to CliniChem as a capital contribution. As
    the holder of the majority of outstanding Class B Common Shares of CliniChem
    following the Distribution, BioChem will have the option to acquire all (but
    not less than all) of the outstanding Class A Common Shares of CliniChem
    under specified conditions.
 
3.  DESCRIPTION OF BUSINESS AND CERTAIN TRANSACTIONS WITH BIOCHEM
 
    CliniChem does not intend to perform any research or other activities, but
    rather will contract with BioChem to perform all such activities pursuant to
    the terms of the Research and Development Agreement to be entered into by
    and between CliniChem and BioChem.
 
    CliniChem intends to enter into certain agreements with BioChem, including
    the Research and Development Agreement, the Technology License Agreement and
    the Services Agreement, relating to the proposed research, development and
    licensing of the therapeutic and vaccine products developed pursuant to
    CliniChem's therapeutic development program and its vaccine program. In
    addition, CliniChem will grant to BioChem an option to acquire all rights to
    each CliniChem Product.
 
    Substantially all of the management and operating activities of CliniChem
    will be carried out by BioChem under the Research and Development Agreement
    and the Services Agreement.
 
4.  ACCOUNTING FOR REVENUES AND EXPENSES
 
    The Company expects to incur most of its expenses under agreements with
    BioChem. Development costs paid to BioChem under the Research and
    Development Agreement, and the Technology Fee paid to BioChem under the
    Technology License Agreement, will be recorded as research and development
    expenses when incurred. Amounts paid to BioChem under the Services Agreement
    will be recorded as administrative expenses when incurred except for product
    development costs which meet all of the criteria for deferment and whose
    recovery can reasonably be regarded as assured. These costs will be
    capitalized and amortized from the date of commercial production on a
    straight-line basis over a period not exceeding five years. However, for
    purposes of generally accepted accounting principles in the United States,
    all such costs will be expensed as incurred.
 
                                       F-4
<PAGE>   72
 
                           CLINICHEM DEVELOPMENT INC.
 
                            PRO FORMA BALANCE SHEET
 
                             AS AT FEBRUARY 6, 1998
                                  (UNAUDITED)
 
     The following pro forma balance sheet should be read in conjunction with
the audited balance sheet and notes to the balance sheet of CliniChem as at
February 6, 1998. The pro forma balance sheet is presented to show the financial
position of CliniChem following the receipt of a contribution of $150 million in
cash from BioChem, the conversion of 1,000 Common Shares owned by BioChem into
2,706,475 Class A Common Shares and into 1,000 Class B Common Shares prior to
the Distribution.
 
<TABLE>
<CAPTION>
                                                                     PRO FORMA      AS ADJUSTED AS OF
                                                     UNADJUSTED     ADJUSTMENTS     FEBRUARY 6, 1998
                                                     ----------     ------------    -----------------
                                                                  (In Canadian dollars)
<S>                                                  <C>            <C>             <C>
ASSETS
Cash.............................................    $    1,000     $150,000,000(a)   $150,001,000
                                                     ===========    ============      ============
SHAREHOLDERS' EQUITY
Common shares, unlimited number of shares
  authorized, 1,000 shares issued and
  outstanding....................................         1,000           (1,000)(b)             --
Class A Common Shares, unlimited number of shares
  authorized, 2,706,475 shares issued and
  outstanding....................................            --              167(b)            167
Class B Common Shares, 1,000 shares authorized,
  1,000 shares issued and outstanding............            --              833(b)            833
Contributed surplus..............................            --      150,000,000(a)    150,000,000
                                                     -----------    ------------      ------------
Total Shareholders' equity.......................    $    1,000     $150,000,000      $150,001,000
                                                     ===========    ============      ============
</TABLE>
 
- ---------------
 
(a) To reflect the receipt of the $150 million contribution from BioChem.
(b) To reflect the conversion of 1,000 Common Shares held by BioChem into
    2,706,475 Class A Common Shares and into 1,000 Class B Common Shares.
 
                                       F-5
<PAGE>   73
 
          ------------------------------------------------------
             ------------------------------------------------------
          ------------------------------------------------------
             ------------------------------------------------------
 
          ------------------------------------------------------
             ------------------------------------------------------
          ------------------------------------------------------
 
             ------------------------------------------------------
 
NO DEALER, SALESPERSON OR OTHER
PERSON HAS BEEN AUTHORIZED TO GIVE
ANY INFORMATION OR TO MAKE ANY
REPRESENTATION IN CONNECTION WITH
THIS OFFERING OTHER THAN THOSE
CONTAINED IN THIS PROSPECTUS, AND IF
GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATION MUST NOT BE RELIED
UPON AS HAVING BEEN AUTHORIZED BY
BIOCHEM OR CLINICHEM. THIS
PROSPECTUS DOES NOT CONSTITUTE AN
OFFER OF ANY SECURITIES OTHER THAN
THE CLASS A COMMON SHARES TO WHICH
IT RELATES OR AN OFFER TO ANY PERSON
IN ANY JURISDICTION WHERE SUCH OFFER
WOULD BE UNLAWFUL. NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY
SALE SHALL, UNDER ANY CIRCUMSTANCES,
CREATE ANY IMPLICATION THAT THE
INFORMATION CONTAINED HEREIN IS
CORRECT AS OF ANY TIME SUBSEQUENT TO
THE DATE HEREOF.
 
- --------------------------------------------------------------
 
         TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                           PAGE
                                           ----
<S>                                       <C>
Available Information....................       2
Incorporation of Certain Documents by
  Reference..............................       2
Enforceability of Civil Liabilities Under
  United States Federal Securities
  Laws...................................       3
Trademarks...............................       3
Exchange Rate Data.......................       3
Prospectus Summary.......................       4
Glossary.................................      17
Risk Factors.............................      19
The Distribution.........................      27
CliniChem Pro Forma Capitalization.......      31
Reasons for the Distribution and Effects
  on BioChem.............................      31
Business of CliniChem....................      34
Selected Financial Data of CliniChem.....      47
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations.............................      48
The Agreements and the Purchase Option...      49
Income Tax Considerations................      56
Exchange Controls and Other Limitations
  Affecting Security Holders.............      62
Description of CliniChem's Share
  Capital................................      62
Description of BioChem's Share Capital...      64
Legal Matters............................      65
Experts..................................      65
Material Contracts.......................      65
Promoter.................................      65
Auditors, Transfer Agent and Registrar...      65
Purchasers' Statutory Rights.............      65
Index to Financial Statements............     F-1
Opinion of Merrill Lynch, Pierce, Fenner
  & Smith Incorporated...................     A-1
</TABLE>
 
UNTIL          , 1998 (THE 25TH DAY
AFTER THE DATE OF THIS PROSPECTUS),
ALL DEALERS EFFECTING TRANSACTIONS
IN THE CLASS A COMMON SHARES,
WHETHER OR NOT PARTICIPATING IN THIS
DISTRIBUTION, MAY BE REQUIRED TO
DELIVER A PROSPECTUS. THIS IS IN
ADDITION TO THE OBLIGATION OF
DEALERS TO DELIVER A PROSPECTUS WHEN
ACTING AS UNDERWRITERS AND WITH
RESPECT TO THEIR UNSOLD ALLOTMENTS
OR SUBSCRIPTIONS.
 
                                                         CLINICHEM
                                                      DEVELOPMENT INC.
                                                   CLASS A COMMON SHARES
                                                    BIOCHEM PHARMA INC.
                                                       COMMON SHARES
 
            --------------------------------------------------------------------
                                                         PROSPECTUS
 
            --------------------------------------------------------------------
                                                                 , 1998
<PAGE>   74
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
     The following table sets forth the costs and expenses payable by CliniChem
in connection with the sale of the CliniChem Common Shares being registered (all
amounts are estimated except the SEC Registration Fee and the Nasdaq National
Market Listing Application Fee):
 
   
<TABLE>
<S>                                                     <C>
SEC Registration Fee.................................   $   30,975.00
Nasdaq National Market Listing Application Fee.......       19,000.00
Financial Advisory Fee...............................    3,000,000.00
Blue Sky Qualification Fees and Expenses.............       10,000.00
Accounting Fees......................................      500,000.00
Legal Fees and Expenses..............................      800,000.00
Transfer Agent and Registrar Fees....................       30,000.00
Printing and Engraving...............................       45,000.00
Miscellaneous........................................      100,000.00
                                                        -------------
Total................................................   $4,534,955.00
                                                        =============
</TABLE>
    
 
   
ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
    
 
     Except as hereinafter set forth, there is no charter provision, by law,
contract, arrangement or statute under which any director or officer of BioChem
or CliniChem is insured or indemnified in any manner against any liability which
he may incur in his capacity as such.
 
     The Canada Business Corporations Act provides that a corporation may
indemnify, and BioChem's and CliniChem's By-laws each provide that BioChem and
CliniChem shall indemnify, in each case except in respect of an action by or on
behalf of BioChem or CliniChem or a body corporate of which BioChem or CliniChem
is or was a shareholder or creditor to procure a judgment in its favor, an
officer or director of BioChem or CliniChem, a former officer or director of
BioChem or CliniChem or a person who acts or acted at BioChem's or CliniChem's
request as a director or officer of a body corporate of which BioChem or
CliniChem is or was a shareholder or creditor, and his heirs and legal
representatives, against all costs, charges and expenses, including an amount
paid to settle an action or satisfy a judgment, reasonably incurred by him in
respect of any civil, criminal or administrative action or proceeding to which
he is made a party by reason of his being or having been a director or officer
of BioChem or CliniChem or such body corporate, if he acted honestly and in good
faith with a view to the best interests of BioChem or CliniChem, and, in the
case of a criminal or administrative action or proceeding that is endorsed by a
monetary penalty, he had reasonable grounds for believing that his conduct was
lawful.
 
                                      II-1
<PAGE>   75
 
ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES
 
     In February, 1998, CliniChem sold 1,000 common shares to BioChem Pharma
Inc. for an aggregate cash purchase price of $1,000. The common shares were
issued in a transaction consummated solely in Canada and, as such, without
registration under the Securities Act of 1933, as amended. No underwriting
commissions were paid in connection with such issuance.
 
ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
EXHIBIT
NUMBER   DESCRIPTION
 
   
   3.1   Articles of Incorporation of CliniChem**
    
 
   
   3.2   By-Laws of CliniChem**
    
 
   
   3.3   Restated Articles of Incorporation of CliniChem (to be effective prior
        to the Distribution)**
    
 
   
   4.1   Specimen Certificate of Class A Common Shares of CliniChem**
    
 
   
   4.2   Specimen Certificate of Common Shares of BioChem*
    
 
   
   5.1   Opinion of Stikeman, Elliott as to legality of underlying Class A
         Common Shares of CliniChem, including consent**
    
 
   
   5.2   Opinion of Stikeman, Elliott as to legality of underlying Common Shares
         of BioChem including consent**
    
 
   
   8.1   Opinion of Stikeman, Elliott as to Canadian tax matters, including
        consent*
    
 
   
   8.2   Opinion of Kirkland & Ellis as to U.S. tax matters, including consent*
    
 
   
  10.1   Technology License Agreement between CliniChem and BioChem**
    
 
   
  10.2   Research and Development Agreement between CliniChem and BioChem**
    
 
   
  10.3   Product Option Agreement between CliniChem and BioChem**
    
 
   
  10.4   Distribution Agreement between CliniChem and BioChem**
    
 
   
  10.5   Services Agreement between CliniChem and BioChem**
    
 
   
  10.6   Amendment No. 1 to Research and Development Agreement between CliniChem
         and BioChem**
    
 
   
  10.7   Amendment No. 1 to Technology License Agreement between CliniChem and
         BioChem*
    
 
   
  23.1   Consent of Ernst & Young, re CliniChem*
    
 
   
  23.2   Consent of Stikeman, Elliott (included in Exhibit 5.1, Exhibit 5.2, and
        Exhibit 8.1)***
    
 
   
  23.3   Consent of Kirkland & Ellis (included in Exhibit 8.2)*
    
 
   
  23.4   Consent of Merrill Lynch, Pierce, Fenner & Smith Incorporated**
    
 
   
  23.5   Consent of Elizabeth Greetham**
    
 
   
  23.6   Consent of The Honorable Celine Hervieux-Payette**
    
 
  24.1   Powers of Attorney (included on signature pages)**
 
   
  27.1   Financial Data Schedule*
    
 
   
  99.1   Form of Opinion of Merrill Lynch, Pierce, Fenner & Smith Incorporated**
    
- ------------------
   
*   Filed herewith
    
**  Previously filed.
   
*** Filed herewith with respect to Exhibit 8.1 only.
    
 
                                      II-2
<PAGE>   76
 
ITEM 17.  UNDERTAKINGS
 
     The undersigned Registrants, CliniChem and BioChem, each hereby undertake:
 
     (1)  To file, during any period in which offers or sales are being made, a
        post effective amendment to this registration statement;
 
        (i)   To include any prospectus required by section 10(a)(3) of the
             Securities Act of 1933, as amended ("Securities Act");
 
        (ii)  To reflect in the prospectus included in this registration
             statement any facts or events arising after the effective date of
             this registration statement (or the most recent post-effective
             amendment thereof) which, individually or in the aggregate,
             represent a fundamental change in the information set forth in this
             registration statement. Notwithstanding the foregoing, any increase
             or decrease in volume of securities offered (if the total dollar
             value of securities offered would not exceed that which was
             registered) and any deviation from the low or high end of the
             estimated maximum offering range may be reflected in the form of
             prospectus filed with the Securities and Exchange Commission
             ("SEC") pursuant to Rule 424(b) if, in the aggregate, the changes
             in volume and price represent no more than a 20% change in the
             maximum aggregate offering price set forth in the "Calculation of
             Registration Fee" table in the effective registration statement;
             and
 
        (iii) To include any material information with respect to the plan of
             distribution nor previously disclosed in the registration statement
             or any material change to such information in this registration
             statement.
 
     (2)  To remove from registration by means of a post-effective amendment any
        of the securities being registered which remain unsold at the
        termination of the offering.
 
     (3)  To file a post-effective amendment to this registration statement to
        include any financial statements required by Rule 3-19 of Regulation S-X
        under the Securities Exchange Act of 1934 throughout the offering.
 
     (4)  For the purpose of determining any liability under the Securities Act
        of 1933, each post-effective amendment that contains a form of
        prospectus shall be deemed to be a new registration statement relating
        to the securities offered therein, and the offering of such securities
        at that time shall be deemed to be the initial bona fide offering
        thereof.
 
     (5)  For the purpose of determining any liability under the Securities Act
        of 1933, each filing of the registrant's annual report pursuant to
        Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and,
        where applicable, each filing of an employee benefit plan's annual
        report pursuant to Section 15(d) of the Securities Exchange Act of 1934)
        that is incorporated by reference in the registration statement shall be
        deemed to be a new registration statement relating to the securities
        offered therein, and the offering of such securities at that time shall
        be deemed to be the initial bono fide offering thereof.
 
     (6)  Insofar as indemnification for liabilities arising under the
        Securities Act may be permitted to directors, officers and controlling
        persons of the Registrant pursuant to the provisions described under
        item 14 above, or otherwise, the Registrant has been advised that in the
        opinion of the Securities and Exchange Commission such indemnification
        is against public policy as expressed in the Securities Act of 1933 and
        is, therefore, unenforceable. In the event that a claim for
        indemnification against such liabilities (other than the payment by the
        Registrant of expenses incurred or paid by a director, officer or
        controlling person of the Registrant in the successful defense of any
        action, suit or proceeding) is asserted by such director, officer or
        controlling person in connection with the securities being registered,
        the Registrant will, unless in the opinion of its counsel the matter has
        been settled by controlling precedent, submit to a court of appropriate
        jurisdiction the question of whether such indemnification by it is
        against public policy as expressed in the Securities Act of 1933 and
        will be governed by the final adjudication of such issue.
 
                                      II-3
<PAGE>   77
 
     CliniChem and BioChem each hereby undertake to provide to the General Trust
of Canada, the distribution agent, at the Distribution Date certificates in such
denominations and registered in such names as required by the Distribution Agent
to permit prompt delivery to each purchaser.
 
                                      II-4
<PAGE>   78
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form F-1 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the city of Laval, Quebec, on May 27, 1998.
    
 
                                          CLINICHEM DEVELOPMENT INC.
 
                                          By:       /s/ FREDERICK J. ANDREW
 
                                              Name: Frederick J. Andrew
                                              Title: Chief Financial
                                                Officer and Director
 
   
     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No. 4 to Registration Statement has been signed on behalf of CliniChem
Development Inc. by the following persons in the capacities and on the dates
indicated.
    
 
   
<TABLE>
<CAPTION>
                    NAME                                       CAPACITY                      DATE
                    ----                                       --------                      ----
<C>                                            <S>                                       <C>
 
                      *                        Chairman and President                    May 27, 1998
- ---------------------------------------------  (Principal Executive Officer)
          Francesco Bellini, Ph.D.
 
           /s/ FREDERICK J. ANDREW             Chief Financial Officer and Director      May 27, 1998
- ---------------------------------------------  (Principal Financial and Accounting
             Frederick J. Andrew               Officer)
 
           /s/ CHARLES-A. TESSIER              General Counsel and Secretary             May 27, 1998
- ---------------------------------------------
              Charles-A Tessier
 
                      *                        Director                                  May 27, 1998
- ---------------------------------------------
              Francois Legault
</TABLE>
    
 
- ---------------
 
   
*   Means signed by attorney-in-fact.
    
 
                                      III-1
<PAGE>   79
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form F-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the city of Laval, Quebec, on May 27, 1998.
    
 
                                          BIOCHEM PHARMA INC.
 
                                          By:       /s/ FREDERICK J. ANDREW
 
                                              Name: Frederick J. Andrew
                                              Title: Chief Financial
                                                Officer and Director
 
   
     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No. 2 to Registration Statement has been signed on behalf of BioChem Pharma Inc.
by the following persons in the capacities and on the dates indicated
    
 
   
<TABLE>
<CAPTION>
                    NAME                                      CAPACITY                       DATE
                    ----                                      --------                       ----
<C>                                             <S>                                    <C>
 
                      *                         Chairman of the Board of Directors     May 27, 1998
- ---------------------------------------------
             Jean-Louis Fontaine
 
                      *                         Director                               May 27, 1998
- ---------------------------------------------
                  Guy Lord
 
                      *                         President, Chief Executive Officer     May 27, 1998
- ---------------------------------------------   and Director (Principal Executive
          Francesco Bellini, Ph.D.              Officer)
 
           /s/ FREDERICK J. ANDREW              Chief Financial Officer (Principal     May 27, 1998
- ---------------------------------------------   Financial and Accounting Officer)
             Frederick J. Andrew
 
           /s/ CHARLES-A. TESSIER               Vice-President, Legal Affairs and      May 27, 1998
- ---------------------------------------------   Corporate Secretary
              Charles-A Tessier
 
                      *                         Director                               May 27, 1998
- ---------------------------------------------
            Gervais Dionne, Ph.D.
 
                      *                         Director                               May 27, 1998
- ---------------------------------------------
            James A. Grant, Q.C.
 
                      *                         Director                               May 27, 1998
- ---------------------------------------------
                 Guy Savard
 
                      *                         Director                               May 27, 1998
- ---------------------------------------------
         Jean-Francois Formela, M.D.
</TABLE>
    
 
- ---------------
 
   
*   Means signed by attorney-in-fact
    
 
                                      III-2

<PAGE>   1
   
                                                                     EXHIBIT 4.2
                          [FRONT OF STOCK CERTIFICATE]
    
                              BIOCHEM PHARMA INC.
                                   
     CONSTITUEE EN VERTU DE LA LOI CANADIENNE SUR LES SOCIETES PAR ACTIONS
            INCORPORATED UNDER THE CANADA BUSINESS CORPORATIONS ACT

       LE CAPITAL-ACTIONS AUTORISE DE LA SOCIETE EST CONSTITUE D'UN NOMBRE
                    ILLIMITE D'ACTIONS SANS VALEUR NOMINALE.

                THE AUTHORIZED SHARE CAPITAL OF THE CORPORATION
                      CONSISTS OF AN UNLIMITED NUMBER OF
                        COMMON SHARES WITHOUT PAR VALUE.

                               CUSIP 09058T 10 8

                                NUMERO - NUMBER

                                ACTIONS - SHARES

Les presentes attestent que
This certifies that

est le detenteur enregistre de
is the registered holder of

ACTIONS ORDINAIRES SANS VALEUR NOMINALE ENTIEREMENT LIBEREES ET NON
SUJETTES A APPELS DE VERSEMENTS DU CAPITAL-ACTIONS DE

COMMON SHARES WITHOUT PAR VALUE, FULLY PAID AND NOT SUBJECT TO
CALLS, OF THE SHARE CAPITAL OF

                          BIOCHEM PHARMA INC.

     L'inscription des transferts des actions representees par ce certificat ne
peut etre faite aux livres de la Societe que par le detenteur inscrit en
personne ou par son mandataire dument autorise par ecrit, sur remise de ce
cetificat dument endosse, sous reserve des exigences des lois regissant la
Societe.

     Ce certificat n'est valide que s'il est contresigne par l'agent des
transferts et inscrit par l'agent charge de la tenue des registres de la
Societe.

     EN FOI DE QUOI, la Societe a fait signer ce certificat par ses officiers
dument autorises.


     Entry of the transfers of the shares represented by this certificate may be
made in the books of the Corporation only by the registered holder in person or
by his attorney duly authorized in writing, upon surrender of this certificate
properly endorsed, subject to compliance with the requirements of the laws
governing the Corporation.

     This certificate shall not be valid unless countersigned by the Transfer
Agent and registered by the Registrar of the Corporation.

     IN WITNESS WHEREOF, the Corporation has caused this certificate to be
signed by its duly authorized officers.

Date/Dated:

CONTRESIGNE ET INSCRIT - COUNTERSIGNED AND REGISTERED
TRUST GENERAL DU CANADA, Montreal, Toronto
GENERAL TRUST OF CANADA, Montreal, Toronto
AGENT DES TRANSFERTS ET AGENT CHARGE DE LA TENUE DES REGISTRES
TRANSFER AGENT AND REGISTRAR

PAR - PER: 
           ---------------------------------------------------
            REPRESENTANT AUTORISE - AUTHORIZED REPRESENTATIVE

LE PRESIDENT,                          LE PREMIER VICE-PRESIDENT, FINANCES,
                                       ADMINISTRATION ET TRESORIER,


PRESIDENT                              SENIOR VICE-PRESIDENT, FINANCES,
                                       ADMINISTRATION AND TREASURER

L'INSCRIPTION DU TRANSFERT DES ACTIONS REPRESENTEES PAR CE CERTIFICAT PEUT ETRE
FAITE AUX PRINCIPALES PLACES D'AFFAIRES DE TRUST GENERAL DU CANADA A MONTREAL
ET A TORONTO.

REGISTRATION OF THE TRANSFER OF THE SHARES REPRESENTED BY THIS CERTIFICATE MAY
BE MADE AT THE PRINCIPAL OFFICES OF GENERAL TRUST OF CANADA IN MONTREAL AND
TORONTO.
<PAGE>   2
   
                                                    [BACK OF STOCK CERTIFICATE]
    

<TABLE>
<S>                                                                  <C>
LE TEXTE QUI SUIT EST UN SOMMAIRE DES DROITS, PRIVILEGES,            THE FOLLOWING IS A SUMMARY OF THE RIGHTS, PRIVILEGES, 
CONDITIONS ET RESTRICTIONS AFFERENTS AUX ACTIONS DU                  CONDITIONS AND RESTRICTIONS ATTACHING TO THE SHARES OF THE 
CAPITAL-ACTIONS DE LA SOCIETE DONT LE TEXTE COMPLET SERA             SHARE CAPITAL OF THE CORPORATION, THE FULL TEXT OF WHICH WILL 
FOURNI, SANS FRAIS, SUR DEMANDE.                                     BE PROVIDED WITHOUT CHARGE UPON REQUEST.   
                                                                     
ACTIONS ORDINAIRES                                                   COMMON SHARES 
Les porteurs d'actions ordinaires auront                             The holders of Common Shares are entitled to one vote per 
droit a un vote par action et ont droit de recevoir les              share, to receive such dividends as the board of directors of 
dividendes que le conseil d'administration de la Societe             the Corporation may delcare and, in the event of the   
peut declarer et de recevoir le reliquat des biens de la             liquidation or dissolution of the Corporation, to receive the
Societe en cas de dissolution ou de liquidation.                     remaining assets of the Corporation.
                                                                     
Pour valeur recue, le (la) soussigne(e) vend, cede et                For value received, the undersigned hereby sells, assigns and 
transporte, par les presentes, a                                     transfers unto 


      INDIQUER LE NUMERO D'ASSURANCE   (Box)(Box)(Box)-(Box)(Box)(Box)-(Box)(Box)(Box)   PLEASE INSERT SOCIAL INSURANCE
             SOCIALE DU CESSIONNAIRE                                                     NUMBER OF TRANSFEREE
              
____________________________________________________________________________________________________________________________________

                                                                                                                             actions
_____________________________________________________________________________________________________________________________ shares


du capital-actions representees par le present certificat et         of the share capital represented by the within certificate, 
constitue par les presentes                                          and does hereby irrevocably constitute and appoint

____________________________________________________________________________________________________________________________________

son mandataire irrevocable, avec plein droit de delegation           Attorney to transfer the said shares on the securities 
des pouvoirs conferes, pour le transfert desdites actions            registers of the within named Corporation with full power of 
dans les registres des valeurs mobilieres de la Societe.             substitution in the premises.


Date ______________________________________________________


Temoin                                                               Signature _____________________________________________________
Witness ___________________________________________________



AVIS : LA SIGNATURE A CETTE CESSION DOIT CORRESPONDRE, EN            NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND
TOUS POINTS, AU NOM TEL QU'ECRIT AU RECTO DU CERTIFICAT,             WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE,
SANS AUCUNE ADDITION, ALTERATION OU MODIFICATION.                    IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT, OR
                                                                     ANY CHANGE WHATEVER.

''Jusqu'a la date de separation (definie au regime de droits         Until the Seperation Time (as defined in the Rights Plan
mentionne ci-dessous), le present certificat atteste egalement       referred to below), this certificate also evidences and
et reconnait au porteur certains droits decrits dans le contrat      entitles the holder hereof to certain Rights as set forth
sur le regime de droits des actionnaires conclu en date du           in a Shareholder Rights Plan Agreement, dated as of the
28 avril 1995 (le regime de droits) entre BioChem Pharma inc.        28th day of April 1995 (the ''Rights Plan''), between
(la Compagnie) et le Trust General du Canada, en sa qualite          BioChem Pharma Inc. (the ''Company'') and Trust General
de depositaire (le depositaire) dont les dispositions sont           du Canada, as rights agent (the ''Rights Agent''), the 
integrees aux presentes par renvoi et dont un exemplaire             terms of which are hereby incorporated herein by
a ete depose aux bureaux de direction de la Compagnie.               reference and a copy of which is on file at the principal
Dans certaines circonstances enoncees au regime de droits,           executive office of the Company. Under certain circumstances,
ceux-ci peuvent etre modifies ou rachetes, expirer, devenir          as set forth in the Rights Plan, such Rights may be amended
nuls (si, dans un certain cas, ils sont detenus en propriete         or redeemed, may expire, may become null and void (if, in
effective par une personne qui est, etait ou devient un              certain cases, they are issued to or ''Beneficially Owned''
acquereur, au sens ou l'entend le regime de droits, ou s'ils         by any person who is, was or becomes an ''Acquiring Person'',
sont emis a une telle personne et qu'ils soient detenus              as such terms are defined in the Rights Plan, whether currently
actuellement par ou pour cette personne ou par ou pour               held by or on behalf of such Person or any subsequent holder)
tout porteur subsequent) ou peuvent etre constates par               or may be evidenced by separate certificates and may no 
des certificats distincts. Un exemplaire du regime de                longer be evidenced by this certificate. 
droits sera expedie sans frais au porteur des presentes
qui en fait la demande par ecrit.''

</TABLE>

<PAGE>   1
                                                                     Tax opinion
                                                                     Exhibit 8.1

   
397-3000

                                  May [___], 1998
    

BioChem Pharma Inc.
275 Armand-Frappier Blvd.
Laval, Quebec
Canada
H7V 4A7

Attention:  Alan De Sousa, Vice-President Corporate Finance

                      Subject: CliniChem Development Inc.

Dear Sirs:

     We have acted as Canadian counsel to BioChem Pharma Inc. ("BioChem") in
connection with the proposed distribution by BioChem to its shareholders by way
of a dividend-in-kind of up to 2 800 000 Class A Common Shares, without par
value of CliniChem Development Inc. ("CliniChem") (the "Common Shares").

     We refer to the registration statement and the related prospectus
(respectively, the "Registration Statement" and the "Prospectus") filed by
CliniChem under the Securities Act, 1933 (as amended) (the "Act") in respect of
the foregoing.

   
     In connection with this opinion, we have examined and have assumed the
truth and accuracy of the contents of such documents and certificates of
officers of and advisers to BioChem and CliniChem and of public officials as to
factual matters and have conducted such searches in public registries in Canada
as we have deemed necessary or appropriate for the purposes of this opinion but
we have made no independent investigation regarding such factual matters.  In
our examination, we have assumed the genuineness of all signatures, the
authenticity of all documents submitted to us as originals, the conformity to
original documents of all documents submitted to us as certified or photostatic
copies and the authenticity of the originals of such documents. We have further
assumed that none of the resolutions and authorities of the shareholders or
directors of BioChem and CliniChem upon which we have relied has been varied,
amended or revoked in any respect or has expired and that the distribution by
BioChem of the Common Shares will be carried out in accordance with such
resolutions and authorities and as contemplated by and described in the
Registration Statement and in the Prospectus.
    
<PAGE>   2
     We are admitted to practice law only in the Province of Quebec, Canada and
accordingly express no opinion on the laws of any jurisdiction other than the
laws of Quebec and the laws of Canada as they relate to the matters therein, in
force as at the date hereof.

     Based upon the foregoing, the statements  in the Registration Statement and
in the Prospectus under the heading "Canadian Federal Income Tax
Considerations", to the extent that they constitute matters of law or legal
conclusions with respect thereto, and which have been prepared or reviewed by
us, are our opinion.

     We hereby consent to the filing of this opinion with the United States
Securities and Exchange Commission as an exhibit to the Registration Statement
and to the references to our firm under the aforesaid heading.

     This opinion is to be construed in accordance with and governed by the laws
of the Province of Quebec.

                             STIKEMAN, ELLIOTT
   

    
                                     - 2 -


<PAGE>   1



                                                                     Exhibit 8.2

                        [Letterhead of Kirkland & Ellis]




To Call Writer Direct
212-446-4800



                                 April 9, 1997


CliniChem Development Inc.
275 Armand-Frappier Blvd.
Laval, Quebec, Canada  H7V-4A7

     Re:  CliniChem Development Inc.
          Registration Statement on Form F-1
          (File No. 333-45871)
           ------------------
    
     We have acted as special counsel to CliniChem Development Inc.
(the "COMPANY") in connection with its Registration Statement on Form F-1 (File
No. 333-45871, filed with the Securities and Exchange Commission on April 9,
1997 (the "REGISTRATION STATEMENT").
     
     In preparing our opinion, we have reviewed and relied upon Amendment No. 2
to the Company's Registration Statement.  We have not inspected any other
documents or undertaken any independent verification of factual matters in
connection with our opinion.  On the basis of the foregoing, the section of the
Registration Statement entitled "Income Tax Considerations - United States
Federal Income Tax Considerations" is our opinion, subject to the assumptions
and qualifications described therein.

     Our opinion is based upon the applicable provisions of the Internal Revenue
Code of 1986, as amended; the Treasury Regulations promulgated or proposed
thereunder; current positions of the Internal Revenue Service (the "IRS")
contained in published revenue rulings, revenue procedures, and announcements;
existing judicial decisions; and other applicable authorities. No tax rulings
have been sought from the IRS with respect to any of the matters discussed in
the Registration Statement. Unlike a ruling from the IRS, opinions of counsel
are not binding on the IRS. Hence, no assurance can be given that the opinion
stated in the Registration Statement will not be successfully challenged by the
IRS or by a court.  We express no opinion concerning any United States federal
income tax consequences of the Distribution except as expressly set forth in the
Registration Statement.

     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement, and to the reference to this firm and the summarization
of our opinion under the section titled "Prospectus Summary - Income Tax
Considerations" in the Registration Statement. In giving this consent, we do not
thereby admit that we are in the category of persons whose consent is required
under Section 7 of the Securities Act of 1933, as amended, or the rules and
regulations of the Securities and Exchange Commission promulgated thereunder.

                             Very truly yours,
                             

                             Kirkland & Ellis

<PAGE>   1
                                                                    Exhibit 10.7

                                                                  EXECUTION COPY

                                  AMENDMENT TO
                          TECHNOLOGY LICENSE AGREEMENT
                                 BY AND BETWEEN
              BIOCHEM PHARMA INC. AND CLINICHEM DEVELOPMENT INC.,

     THIS AMENDMENT (the "Amendment"), made and entered into as of the 19th day
of May, 1998 (the "Effective Date"), is by and between BIOCHEM PHARMA INC., a
Canadian corporation ("BioChem") and CLINICHEM DEVELOPMENT INC., a Canadian
corporation ("CliniChem").

     WHEREAS, BioChem and CliniChem are parties to that certain Technology
License Agreement dated March 31, 1998 (the "Original Agreement"); 

     WHEREAS, BioChem and CliniChem desire to amend the Original Agreement as
set forth herein; and

     WHEREAS, capitalized terms used but not otherwise defined herein shall have
the meaning ascribed to them in the Original Agreement; 

     NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows: 

1.   Article 3.2 of the Original Agreement shall be amended to read: 

     TECHNOLOGY FEE. In partial consideration for the license granted by BioChem
and the BioChem Affiliates to CliniChem hereunder, CliniChem shall pay in
arrears three hundred fifty-two thousand, one hundred dollars ($352,100) thirty
(30) days after the Distribution Date and three hundred fifty-two thousand, one
hundred dollars ($352,100) on the same day of each of the next forty-seven
months payable as follows: to BioChem, two hundred fifty-two thousand dollars
($252,000), to Tanaud Ireland Inc., thirty thousand dollars ($30,000) and to
Tanaud International B.V., seventy thousand dollars ($70,000), provided,
however, that CliniChem shall not be obligated to make such payments beginning
with any month following the date on which the sum of the number of CliniChem
Products under development by CliniChem pursuant to the Research and Development
Agreement plus the number of CliniChem Products that have been acquired by
BioChem or a BioChem Affiliate pursuant to BioChem's exercise of the Product
Option is less than two (2). 

     All payments to be made by CliniChem to Tanaud International B.V. and
Tanaud Ireland Inc. shall be made net of any Canadian withholding tax applicable
to such payments.

2.   As amended hereby, the Original Agreement shall remain in full force
and effect.
<PAGE>   2
     IN WITNESS HEREOF, the parties have executed this Amendment as of the
Effective Date by their duly authorized representatives.

BIOCHEM PHARMA INC.                              CLINICHEM DEVELOPMENT INC.

__________________________                       _____________________________ 
By:                                              By: 

Title:                                           Title:

__________________________                       _____________________________
By:                                              By: 

Title:                                           Title:

<PAGE>   1
 
                                                                    EXHIBIT 23.1
 
                            CONSENT OF ERNST & YOUNG
 
                       INDEPENDENT CHARTERED ACCOUNTANTS
 
     We consent to the reference to our firm under the caption "Experts" and to
the use of our reports dated February 6, 1998, in the Registration Statement
(Form F-1) and related Prospectus of CliniChem Development Inc. for the
registration of Class A Common Shares.
 
/s/ ERNST & YOUNG
Ernst & Young
 
Montreal, Canada
   
May 27, 1998
    

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
financial statements dated February 6, 1998 included in the Form F-1
Registration Statement and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<CURRENCY> CANADIAN DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             FEB-06-1998
<PERIOD-END>                               FEB-06-1998
<EXCHANGE-RATE>                                   0.70
<CASH>                                           1,000
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                   1,000
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                         1,000
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                     1,000
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        

</TABLE>


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