CHEMEX PHARMACEUTICALS INC
S-4/A, 1995-12-15
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 15, 1995
    
   
                                                       REGISTRATION NO. 33-64031
    
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            ------------------------
   
                                AMENDMENT NO. 1
    
 
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                            ------------------------
 
                          CHEMEX PHARMACEUTICALS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                 <C>                                 <C>
              DELAWARE                              3841                             83-0221517
  (STATE OR OTHER JURISDICTION OF       (PRIMARY STANDARD INDUSTRIAL              (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)       CLASSIFICATION CODE NUMBER)            IDENTIFICATION NUMBER)
</TABLE>
 
                        660 WHITE PLAINS ROAD, SUITE 400
                           TARRYTOWN, NEW YORK 10591
                                 (914) 332-8633
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                             HERBERT H. MCDADE, JR.
                            CHIEF EXECUTIVE OFFICER
                          CHEMEX PHARMACEUTICALS, INC.
                        660 WHITE PLAINS ROAD, SUITE 400
                           TARRYTOWN, NEW YORK 10591
                                 (914) 332-8633
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                                   COPIES TO:
                            JUSTIN P. MORREALE, ESQ.
                             BINGHAM, DANA & GOULD
                               150 FEDERAL STREET
                                BOSTON, MA 02110
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of the Registration Statement.
 
     If any of the securities to be registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box.  /X/
 
     If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  / /

                            ------------------------
 
                        CALCULATION OF REGISTRATION FEE

<TABLE>
==================================================================================================================
   
<CAPTION>
                                                               PROPOSED            PROPOSED
                                           AMOUNT               MAXIMUM             MAXIMUM          AMOUNT OF
      TITLE OF EACH CLASS OF                TO BE           OFFERING PRICE         AGGREGATE        REGISTRATION
    SECURITIES TO BE REGISTERED         REGISTERED(1)          PER SHARE        OFFERING PRICE          FEE
<S>                                 <C>                   <C>                 <C>                 <C>
- ------------------------------------------------------------------------------------------------------------------
Common Stock, $.04 par value.......   14,100,000 Shares    Not Applicable(2)   Not Applicable(2)      $100(2)
- ------------------------------------------------------------------------------------------------------------------
Warrants for the Purchase of Common
  Stock, $.04 par value............   750,000 Warrants            --                  --               --(2)
- ------------------------------------------------------------------------------------------------------------------
Common Stock, $.04 par value....... 750,000 Shares(4)(5)       $0.75(3)           $562,500(3)         $194(2)
==================================================================================================================
</TABLE>
    
 
(1) This Registration Statement relates to securities of the Registrant issuable
    to holders of common stock of ACCESS Pharmaceuticals, Inc., a Texas
    corporation ("ACCESS"), in the proposed merger of ACCESS with and into the
    Registrant (the "Merger"). The amount of common stock, $.04 par value per
    share, of the Registrant to be registered will be determined on the basis of
    the exchange ratio as determined at the time of the Merger and the number of
    shares of ACCESS common stock, $.01 par value per share, to be exchanged in
    the Merger for shares of the Registrant's common stock. Such amount shall be
    at least 13,750,000 shares, subject to adjustment at the time of the Merger
    as provided in the Agreement of Merger and Plan of Reorganization, dated as
    of October 3, 1995, as amended and restated as of October 31, 1995, by and
    between the Registrant and ACCESS.
 
   
(2) Pursuant to Rule 457(f), the registration fee which was previously paid for
    the common stock and warrants to be issued pursuant to the Merger was
    computed on the basis of the book value of the ACCESS common stock to be
    exchanged in the Merger, computed in accordance with Rule 457(f)(2) on
    October 31, 1995 which value on such date was $30,000.
    
 
(3) Offering Price estimated solely for the purpose of determining the
    registration fee pursuant to Rule 457(g) under the Securities Act of 1933
    based upon the exercise price of the warrants.
 
(4) Relates to the issuance of shares of Common Stock by the Registrant upon
    exercise of Common Stock Purchase Warrants.
 
(5) Pursuant to Rule 416 under the Securities Act of 1933, this Registration
    Statement also relates to an indeterminate number of additional shares of
    Common Stock issuable upon exercise of the Warrants as a result of stock
    splits, stock dividends and similar adjustments pursuant to the provisions
    contained therein or related thereto.

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

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT 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.
================================================================================
<PAGE>   2
 
   
                          CHEMEX PHARMACEUTICALS, INC.
    
                        660 White Plains Road, Suite 400
                           Tarrytown, New York 10591
                                 (914) 332-8633
 
                                                                          , 1995
 
Dear Stockholder:
 
   
     You are cordially invited to attend a Special Meeting in Lieu of the 1995
Annual Meeting of Stockholders of Chemex Pharmaceuticals, Inc. ("Chemex") to be
held at 10:00 a.m., January 23, 1996 at          .
    
 
     At the Special Meeting, you will be asked to consider and vote upon
proposals to (i) approve and adopt that certain Agreement of Merger and Plan of
Reorganization, dated as of October 3, 1995, as amended and restated as of
October 31, 1995 (the "Merger Agreement") by and between Chemex and ACCESS
Pharmaceuticals, Inc., a Texas corporation ("ACCESS"), pursuant to which, among
other matters, ACCESS will be merged with and into Chemex with Chemex the
surviving corporation (the "Merger") and each share of ACCESS' common stock,
$.01 par value per share, will be converted into 3.7744 shares of Chemex common
stock, $.04 par value per share ("Chemex Common Stock") (subject to adjustment
as provided in the Merger Agreement); (ii) approve an amendment to the
Certificate of Incorporation of Chemex increasing the number of authorized
shares of Chemex Common Stock to 40,000,000 shares and the number of authorized
shares of the preferred stock, $.01 par value per share, of Chemex to 10,000,000
shares; (iii) approve an amendment to the Certificate of Incorporation of Chemex
to effect a change of the name of Chemex to "ACCESS Pharmaceuticals, Inc."; (iv)
approve the establishment of the Chemex 1995 Stock Option Plan (the "1995 Stock
Option Plan"), under which an aggregate of 2,000,000 shares of Chemex Common
Stock will be issuable pursuant to the terms of such plan; (v) ratify the
selection by the Board of Directors of Chemex of Chemex's independent auditors;
(vi) elect three directors; and (vii) approve an adjournment of the Special
Meeting, if necessary, to permit further solicitation of proxies in the event
that there are not sufficient votes at the Special Meeting to consider and
approve any or all of the above proposals.
 
     The Merger has been proposed following Chemex's efforts to seek a merger
partner and as an alternative to the liquidation of Chemex. If approved and
consummated, the Merger will provide Chemex with new technology opportunities
from ACCESS and the opportunity to expand Chemex's pharmaceutical technology
capabilities.
 
     I am personally very excited about the Merger and believe that it and the
ACCESS technology will enhance the outlook for Chemex.
 
     Based upon the considerations described in the accompanying Proxy
Statement/Prospectus, including the opinion of Advisory Capital Partners, an
investment banking firm retained by Chemex, that the Merger is fair from a
financial point of view to the stockholders of Chemex, the Board of Directors
has approved without dissent the Merger Agreement and the transactions
contemplated thereby, and recommends that you vote "FOR" the approval and
adoption of the Merger Agreement and the transactions contemplated thereby.
Based upon the considerations described in the accompanying Proxy
Statement/Prospectus, the Board of Directors of Chemex has also approved without
dissent the amendments to the Certificate of Incorporation of Chemex and the
establishment of the Chemex 1995 Stock Option Plan, has selected Chemex's
independent auditors and has designated each of the nominees for election as
directors and recommends that you vote "FOR" the approval or ratification of
each of such proposals.
 
     The enclosed Proxy Statement sets forth more detailed information regarding
the proposed Merger, information with respect to ACCESS, certain historical and
pro forma financial data and more detailed information regarding the other
proposals. Please carefully review the enclosed materials.
<PAGE>   3
 
     WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING, IT IS VERY IMPORTANT
THAT YOU MARK, SIGN, DATE AND RETURN THE ENCLOSED PROXY CARD IN THE ENVELOPE
PROVIDED AS SOON AS POSSIBLE. IF YOU ATTEND THE SPECIAL MEETING, YOU MAY REVOKE
THE PROXY AT THAT TIME BY REQUESTING THE RIGHT TO VOTE IN PERSON.
 
                                          Sincerely,
 
                                          HERBERT H. MCDADE, JR.
                                            Chairman of the Board and
                                            Chief Executive Officer
<PAGE>   4
 
                          CHEMEX PHARMACEUTICALS, INC.
                        660 White Plains Road, Suite 400
                           Tarrytown, New York 10591
                                 (914) 332-8633
 
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                         IN LIEU OF 1995 ANNUAL MEETING
 
   
                          TO BE HELD JANUARY 23, 1996
    
                            ------------------------
 
   
     PLEASE TAKE NOTICE, that a Special Meeting in Lieu of the 1995 Annual
Meeting (the "Special Meeting") of the Stockholders of Chemex Pharmaceuticals,
Inc., a Delaware corporation ("Chemex"), will be held at 10:00 a.m., local time,
on January 23, 1996 at          , for the following purposes:
    
 
          1. To consider and vote upon the approval and adoption of that certain
     Agreement of Merger and Plan of Reorganization, dated as of October 3,
     1995, as amended and restated as of October 31, 1995 (the "Merger
     Agreement"), by and between Chemex and ACCESS Pharmaceuticals, Inc., a
     Texas corporation ("ACCESS"), pursuant to which, among other matters, (i)
     ACCESS will be merged with and into Chemex (the "Merger") with Chemex the
     surviving corporation, and (ii) each share of common stock, $.01 par value
     per share, of ACCESS (the "ACCESS Common Stock") will be converted into the
     right to receive, and become exchangeable for (subject to adjustment as
     provided in the Merger Agreement), 3.7744 shares of the common stock, $.04
     par value per share, of Chemex (the "Chemex Common Stock"); provided,
     however, that if at the Effective Time (as such term is defined in the
     Merger Agreement) the Total Cash Assets (as such term is defined in the
     Merger Agreement) of Chemex are less than the Minimum Cash Assets (as such
     term is defined in the Merger Agreement), then, for each one dollar that
     the Total Cash Assets are less than the Minimum Cash Assets, each share of
     ACCESS Common Stock will be converted into the right to receive, and become
     exchangeable for an additional .0000003635 shares of Chemex Common Stock.
 
          2. To consider and vote upon a proposal to amend Chemex's Certificate
     of Incorporation to increase the authorized capital stock of Chemex from
     20,000,000 shares of Chemex Common Stock and 5,000,000 shares of preferred
     stock, $.01 par value per share, of Chemex (the "Chemex Preferred Stock")
     to 40,000,000 shares of Chemex Common Stock and 10,000,000 shares of Chemex
     Preferred Stock;
 
          3. To consider and vote upon a proposal to amend Chemex's Certificate
     of Incorporation to effect a change in the name of Chemex to "ACCESS
     Pharmaceuticals, Inc.";
 
          4. To consider and vote upon a proposal to establish the Chemex 1995
     Stock Option Plan, pursuant to which an aggregate of 2,000,000 shares of
     Chemex Common Stock will be issuable pursuant to the terms of such plan;
     (If this proposal is approved, no further grants will be made under the
     Chemex 1987 Stock Option Plan and the Chemex Non-Employee Director Stock
     Option Plan. As of October 31, 1995, there were options outstanding under
     the 1987 Stock Option Plan to purchase an aggregate of approximately
     915,000 shares of Chemex Common Stock and options outstanding under the
     Non-Employee Director Stock Option Plan to purchase an aggregate of
     approximately 276,000 shares of Chemex Common Stock);
 
          5. To ratify the selection by the Board of Directors of Chemex of
     Chemex's independent auditors;
 
          6. To elect three directors;
 
          7. To approve an adjournment of the Special Meeting, if necessary, to
     permit further solicitation of proxies in the event that there are not
     sufficient votes at the time of the Special Meeting to consider and approve
     any or all of the above proposals; and
 
          8. To transact such other business as may properly come before the
     Special Meeting or any postponements or adjournments thereof.
<PAGE>   5
 
     A copy of the Merger Agreement is attached as Exhibit A to the accompanying
Proxy Statement/Prospectus and is incorporated herein by reference in its
entirety.
 
   
     The Board of Directors of Chemex has fixed the close of business on
December 15, 1995 as the record date for the determination of stockholders of
Chemex entitled to receive notice of, and to vote at, the Special Meeting or any
postponements or adjournments thereof. A list of such stockholders will be
available for examination by any stockholder of Chemex at the Special Meeting
and for a period of ten business days prior to the date of the Special Meeting
during business hours at the offices of Chemex at 660 White Plains Road, Suite
400, Tarrytown, New York 10591.
    
 
     Holders of a majority of the outstanding shares of Common Stock, entitled
to vote at the Special Meeting must be present in person or by proxy in order
for the Special Meeting to be held.
 
                                          By Order of the Board of Directors,
 
                                          HERBERT H. MCDADE, JR.
                                            Chairman of the Board and
                                            Chief Executive Officer
 
Tarrytown, New York
Dated:          , 1995
 
STOCKHOLDERS ARE CORDIALLY INVITED TO ATTEND THE SPECIAL MEETING IN PERSON. YOUR
VOTE IS IMPORTANT. IF YOU DO NOT EXPECT TO ATTEND THE SPECIAL MEETING, OR IF YOU
DO PLAN TO ATTEND BUT WISH TO VOTE BY PROXY, PLEASE COMPLETE, DATE, SIGN AND
MAIL THE ENCLOSED PROXY CARD IN THE RETURN ENVELOPE PROVIDED ADDRESSED TO CHEMEX
PHARMACEUTICALS, INC. C/O AMERICAN STOCK TRANSFER & TRUST CO., 40 WALL STREET,
46TH FLOOR, NEW YORK, NEW YORK 10005 ("AMERICAN STOCK TRANSFER"). PROXIES WILL
ALSO BE ACCEPTED BY TRANSMISSION OF A TELEGRAM, CABLEGRAM OR TELECOPY PROVIDED
THAT SUCH TELEGRAM, CABLEGRAM OR TELECOPY CONTAINS SUFFICIENT INFORMATION FROM
WHICH IT CAN BE DETERMINED THAT THE TRANSMISSION WAS AUTHORIZED BY THE
STOCKHOLDER. THE TELECOPY NUMBER FOR AMERICAN STOCK TRANSFER IS (718) 234-2287.
<PAGE>   6
 
***************************************************************************
*                                                                         *
*  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 STATE IN WHICH  *
*  SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR TO            *
*  REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH    *
*  STATE.                                                                 *
*                                                                         *
***************************************************************************

 
                          CHEMEX PHARMACEUTICALS, INC.
 
                           PROXY STATEMENT/PROSPECTUS
                            ------------------------
 
     This Proxy Statement/Prospectus ("Proxy Statement/Prospectus") is being
furnished by Chemex Pharmaceuticals, Inc., a Delaware corporation ("Chemex"), to
holders of shares of Common Stock, $.04 par value per share, of Chemex (the
"Chemex Common Stock"), in connection with the solicitation of proxies by the
Board of Directors of Chemex for use at a Special Meeting in Lieu of the 1995
Annual Meeting of the Stockholders of Chemex to be held at the time and place
set forth in the accompanying Notice of Special Meeting or any adjournment or
postponement thereof (the "Special Meeting").
 
     At the Special Meeting, the stockholders of Chemex will consider and vote
upon (i) a proposal to approve and adopt that certain Agreement of Merger and
Plan of Reorganization, dated as of October 3, 1995, as amended and restated as
of October 31, 1995 (the "Merger Agreement"), by and between Chemex and ACCESS
Pharmaceuticals, Inc., a Texas corporation ("ACCESS"); (ii) a proposal to amend
Chemex's Certificate of Incorporation to increase the authorized capital stock
of Chemex from 20,000,000 Shares of Chemex Common Stock and 5,000,000 Shares of
Preferred Stock, $.01 par value per share (the "Chemex Preferred Stock"), to
40,000,000 Shares of Chemex Common Stock and 10,000,000 Shares of Chemex
Preferred Stock; (iii) a proposal to amend Chemex's Certificate of Incorporation
to effect a change in the name of Chemex to "ACCESS Pharmaceuticals, Inc."; (iv)
a proposal to establish the Chemex 1995 Stock Option Plan; (v) a proposal to
ratify the selection by the Board of Directors of Chemex of Chemex's independent
auditors; (vi) the election of three directors; and (vii) a proposal to approve
an adjournment of the Special Meeting, if necessary, to permit further
solicitation of proxies in the event there are not enough votes present at the
Special Meeting to consider and approve any or all of the above proposals. A
copy of the Merger Agreement is attached to this Proxy Statement/Prospectus as
Exhibit A and is incorporated herein by reference in its entirety.
 
     Under the terms of the Merger Agreement, ACCESS will be merged with and
into Chemex with Chemex the surviving corporation (the "Merger"), and each
outstanding share of the common stock, $.01 par value per share, of ACCESS (the
"ACCESS Common Stock") will be converted into the right to receive, and become
exchangeable for (subject to adjustment as provided in the Merger Agreement, the
"Exchange Ratio"), 3.7744 shares of Chemex Common Stock; provided, however, that
if at the Effective Time the Total Cash Assets (as such term is defined in the
Merger Agreement) of Chemex is less than the Minimum Cash Assets (as such term
is defined in the Merger Agreement), then, for each one dollar that the Total
Cash Assets are less than the Minimum Cash Assets, each share of ACCESS Common
Stock will be converted into the right to receive, and become exchangeable for,
an additional .0000003635 shares of Chemex Common Stock (the "Net Cash
Adjustment").
                            ------------------------
 
     This Proxy Statement/Prospectus also constitutes the prospectus of Chemex
with respect to a maximum of 14,100,000 shares of Chemex Common Stock to be
issued in exchange for the ACCESS Common Stock in connection with the Merger, a
maximum of 750,000 Warrants which will be issued to the holders of record of
ACCESS Common Stock at the effective time of the Merger upon the occurrence of
certain conditions set forth in the Merger Agreement, each exercisable for one
share of Chemex Common Stock, and 750,000 shares of Chemex Common Stock issuable
upon exercise of such Warrants.
 
     This Proxy Statement/Prospectus and the enclosed form of proxy are first
being mailed to the stockholders of Chemex on or about          , 1995.
 
     On          , 1995, the reported closing sales price of a share of Chemex
Common Stock on the National Association of Security Dealers, Inc. ("Nasdaq")
"OTC" Bulletin Board was $       .
                            ------------------------
 
 THE SECURITIES TO BE ISSUED PURSUANT TO THIS PROXY STATEMENT/ PROSPECTUS HAVE
 NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR
     ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES AND EXCHANGE
         COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROXY
         STATEMENT/PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
                            ------------------------
 
         INVESTMENT IN THE COMMON STOCK OF THE SURVIVING CORPORATION IS
      SPECULATIVE AND INVOLVES A HIGH DEGREE OF RISK. SEE "RISK FACTORS."
 
         The date of this Proxy Statement/Prospectus is          , 1995
<PAGE>   7
 
                             AVAILABLE INFORMATION
 
     Chemex is subject to the information requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act") and, in accordance
therewith, files reports, proxy statements, and other information with the
Securities and Exchange Commission (the "Commission"). Copies of such
information filed by Chemex with the Commission may be inspected and copied at
the public reference facilities maintained by the Commission at 450 Fifth
Street, N.W., Room 1024, Judiciary Plaza, Washington, D.C. 20549, and at the
Regional Offices of the Commission at 7 World Trade Center, New York, New York
10048 and Suite 1400, Northwestern Atrium Center, 500 West Madison Street,
Chicago, Illinois 60611. Copies of such material may be obtained at prescribed
rates from the Public Reference Section of the Commission at 450 Fifth Street,
N.W., Washington, D.C. 20549 Copies of such reports, proxy statements and other
information can also be inspected at the offices of the National Association of
Securities Dealers, Inc., 1735 K Street, N.W., Washington, D.C. 20006.
 
     Chemex has filed with the Commission a Registration Statement on Form S-4
(together with all amendments and exhibits thereto, the "Registration
Statement") under the Securities Act of 1933, as amended (the "1933 Act") and
the rules and regulations promulgated thereunder, of which this Proxy
Statement/Prospectus is a part. This Proxy Statement/Prospectus does not contain
all of the information set forth in the Registration Statement, certain parts of
which are omitted in accordance with the rules and regulations of the
Commission. Such Registration Statement and the exhibits thereto may be
inspected and copied at the Commission's principal office in Washington, D.C. as
well as its Regional offices in New York, New York and Chicago, Illinois.
 
     No person is authorized to give any information or to make any
representations other than those contained in this Proxy Statement/Prospectus,
and if given or made, such information or representations should not be relied
upon as having been authorized. This Proxy Statement/Prospectus does not
constitute an offer to sell, or a solicitation of an offer to purchase, the
securities offered by this Proxy Statement/Prospectus, or the solicitation of a
proxy, in any jurisdiction to or from any person to whom or from whom it is
unlawful to make such offer, solicitation of an offer or proxy solicitation in
such jurisdiction. Neither the delivery of this Proxy Statement/Prospectus nor
any distribution of securities pursuant to this Proxy Statement/Prospectus
shall, under any circumstances, create any implication that there has been no
change in the information set forth herein in the affairs of Chemex or ACCESS
since the date of this Proxy Statement/Prospectus. However, if any material
change occurs during the period that this Proxy Statement/Prospectus is required
to be delivered, this Proxy Statement/Prospectus will be amended or supplemented
accordingly. All information regarding ACCESS in this Proxy Statement/Prospectus
has been supplied by ACCESS, and all information regarding Chemex in this Proxy
Statement/Prospectus has been supplied by Chemex.
<PAGE>   8
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
SUMMARY...............................................................................  1
THE PROPOSED MERGER...................................................................  1
  General.............................................................................  1
  Special Meeting of Chemex Stockholders..............................................  1
  The Parties.........................................................................  2
     Chemex...........................................................................  2
     ACCESS...........................................................................  2
  Required Vote.......................................................................  2
     Chemex...........................................................................  2
     ACCESS...........................................................................  3
     General..........................................................................  3
     Consideration....................................................................  3
     Conversion of Shares.............................................................  3
     Conversion of Warrants...........................................................  4
  Effective Time......................................................................  4
  Valuation...........................................................................  4
  Background of the Merger............................................................  4
  The Exchange Ratio..................................................................  5
  Operations of the Company After the Merger..........................................  6
  Recommendations of the Board of Directors...........................................  6
  Opinion of Financial Advisor........................................................  6
  Conditions of the Merger............................................................  6
  Rights to Terminate and Amendments..................................................  7
  Comparison of Rights Under Applicable Law...........................................  7
  Certain Income Tax Consequences of the Merger.......................................  7
  Absence of Regulatory Filings and Approvals.........................................  7
  Adjournment of the Special Meeting..................................................  7
  Stockholders Agreement..............................................................  7
  Loan to ACCESS......................................................................  8
  Risk Factors........................................................................  8
RISK FACTORS..........................................................................  9
     Risks Associated with Conversion Number..........................................  9
     Possible Volatility of Stock Price...............................................  9
     Concentration of Ownership.......................................................  9
     Development Stage................................................................  9
     Uncertainties Associated with Research and Development Activities................  9
     Absence of Operating Revenue.....................................................  10
     History of Losses................................................................  10
     Future Capital Requirements......................................................  10
     Net Operating Loss Carry forwards................................................  10
     Protection of Proprietary Technology.............................................  10
     Regulation by Government Agencies................................................  11
     Drug-related Risks...............................................................  11
     Product Liability................................................................  11
     Market Impact of Future Sales of Chemex Common Stock.............................  11
     Effect of Certain Charter and By-law Provisions; Possible Issuance of Preferred
      Stock...........................................................................  12
</TABLE>
    
 
                                       ii
<PAGE>   9
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
     Competition......................................................................  12
     Dependence Upon Skilled Personnel................................................  12
     Absence of Dividends.............................................................  12
INTRODUCTION..........................................................................  13
THE SPECIAL MEETING...................................................................  13
  Purpose of the Meeting..............................................................  13
  Date, Time and Place; Record Date...................................................  14
  Voting Rights.......................................................................  14
  State of Incorporation and Principal Place of Business..............................  15
  Appraisal Rights....................................................................  15
THE PROPOSED MERGER...................................................................  16
  General.............................................................................  16
  Closing; Effective Time.............................................................  16
  Exchange of Stock Certificates......................................................  16
  No Fractional Shares................................................................  17
  Background of the Merger............................................................  17
  Conflicts of Interests..............................................................  18
  Reasons for the Merger..............................................................  19
     Chemex...........................................................................  19
     Alternatives to the Merger.......................................................  19
     ACCESS...........................................................................  20
  Discussion of the Advantages and Disadvantages of the Merger........................  21
  Conduct of Chemex's Business After Consummation of the Merger.......................  22
  Recommendation of the Board.........................................................  22
  Opinion of Financial Advisor........................................................  23
  Accounting Treatment of the Merger..................................................  25
  Certain Federal Income Tax Consequences of the Merger...............................  25
  The Merger Agreement................................................................  27
     General..........................................................................  27
     Effective Time of the Merger.....................................................  27
     Representations and Warranties...................................................  28
     Certain Covenants and Agreements.................................................  28
  Effects of the Merger...............................................................  29
     Merger of ACCESS into Chemex; Surviving Corporation..............................  29
     Certificate of Incorporation and By-laws of Surviving Corporation................  29
     Officers and Directors of Surviving Corporation..................................  29
     Additional Consideration.........................................................  30
     Issuance of Chemex Common Stock in the Merger....................................  30
  Conditions to the Merger............................................................  31
  Amendment and Termination; Waivers..................................................  31
  Break Up Fees.......................................................................  32
  No Survival of Representations and Warranties.......................................  32
  Expenses............................................................................  32
  Stockholders Agreement..............................................................  32
  Agreement to Vote in Favor of the Merger............................................  32
AMENDMENT TO THE CHEMEX CERTIFICATE OF INCORPORATION..................................  33
  The Name Change.....................................................................  33
</TABLE>
    
 
                                       iii
<PAGE>   10
 
<TABLE>
<CAPTION>
   
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
THE RATIFICATION OF THE CHEMEX 1995 STOCK OPTION PLAN.................................  33
  1995 Stock Option Plan..............................................................  33
  General.............................................................................  34
  Securities Subject to the 1995 Stock Option Plan and Market Value...................  34
  Eligibility to Participate..........................................................  34
  Administration and Duration.........................................................  34
  Plan Amendments.....................................................................  35
  Options Not Transferable............................................................  35
  Restrictions on Resale..............................................................  35
  Term of Options.....................................................................  35
  Option Price........................................................................  35
  Certain Rules for Certain Stockholders..............................................  35
  Payment.............................................................................  35
  Option Document; Restriction on Transferability.....................................  36
  Tax Aspects of the 1995 Stock Option Plan...........................................  36
RATIFICATION OF SELECTION OF INDEPENDENT AUDITORS.....................................  37
ELECTION OF DIRECTORS.................................................................  37
  Information Concerning Nominees (Class 1)...........................................  38
  Information Concerning the Board....................................................  38
  Reporting Delinquencies.............................................................  39
ADJOURNMENT OF THE SPECIAL MEETING....................................................  40
DESCRIPTION OF CHEMEX'S CAPITAL STOCK.................................................  41
  Common Stock........................................................................  41
  Preferred Stock.....................................................................  41
  Delaware Law and Certain Charter and By-Law Provisions..............................  41
  Certain anti-takeover provisions....................................................  42
  Elimination of Monetary Liability for Officers and Directors........................  42
  Indemnification of Officers and Directors...........................................  42
  Description of Units................................................................  42
  Description of Warrants.............................................................  42
  Transfer Agent and Registrar........................................................  43
PER SHARE PRICE OF AND DIVIDENDS ON CHEMEX COMMON STOCK...............................  44
SELECTED FINANCIAL DATA OF CHEMEX.....................................................  45
BUSINESS OF CHEMEX....................................................................  46
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
  OF CHEMEX...........................................................................  50
  Liquidity and Capital Resources.....................................................  50
  Results of Operations...............................................................  50
     Comparison of Nine Months ended September 30, 1995 and 1994......................  50
     Comparison of Years ended December 31, 1994 and 1993.............................  51
     Comparison of Years ended December 31, 1993 and 1992.............................  52
  Recent Developments.................................................................  53
BUSINESS OF ACCESS....................................................................  54
SELECTED FINANCIAL DATA OF ACCESS.....................................................  62
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
  OF ACCESS...........................................................................  63
  Liquidity and Capital Resources.....................................................  63
     Comparison of Nine Months ended September 30, 1995 and 1994......................  63
</TABLE>
    
 
                                       iv
<PAGE>   11
 
<TABLE>
<CAPTION>
   
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
     Comparison of Years ended December 31, 1994 and 1993.............................  64
     Comparison of Years ended December 31, 1993 and 1992.............................  64
CHEMEX AND ACCESS.....................................................................  66
PRO FORMA COMBINED FINANCIAL INFORMATION..............................................  67
  Pro Forma Combined Condensed Balance Sheet..........................................  67
  Notes to Pro Forma Combined Condensed Balance Sheet.................................  68
  Pro Forma Combined Condensed Statement of Operations................................  69
  Nine Months Ended September 30, 1995................................................  70
  Year Ended December 31, 1994........................................................  71
MANAGEMENT OF ACCESS..................................................................  72
EXECUTIVE COMPENSATION OF ACCESS......................................................  72
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT -- ACCESS..............  73
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS -- ACCESS..............................  73
DESCRIPTION OF ACCESS CAPITAL STOCK...................................................  74
  Common Stock........................................................................  74
  Preferred Stock.....................................................................  74
  Description Of Warrants.............................................................  74
COMPARATIVE PER SHARE DATA............................................................  74
BOOK VALUE PER SHARE..................................................................  75
MANAGEMENT -- CHEMEX..................................................................  76
  Before the Consummation of the Merger...............................................  76
  After the Consummation of the Merger................................................  76
  Business and Experience of Directors and Executive Officers.........................  76
EXECUTIVE COMPENSATION................................................................  77
  Options/SAR Grants in 1994..........................................................  78
  Options/SARs Exercises and Year-End Value Table.....................................  78
  Employment Agreements...............................................................  78
  Director Compensation...............................................................  79
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT -- CHEMEX..............  80
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS........................................  82
  Transactions with Management and Others.............................................  82
COMPARISON OF RIGHTS OF HOLDERS OF CHEMEX COMMON STOCK AND ACCESS COMMON STOCK........  84
LEGAL MATTERS.........................................................................  85
EXPERTS...............................................................................  85
STOCKHOLDER PROPOSALS.................................................................  86
DISCRETIONARY AUTHORITY...............................................................  87
EXHIBIT A -- AGREEMENT OF MERGER AND PLAN OF REORGANIZATION...........................  A-1
EXHIBIT B -- OPINION OF FINANCIAL ADVISOR.............................................  B-1
EXHIBIT C -- TEXAS STOCKHOLDER APPRAISAL RIGHTS.......................................  C-1
EXHIBIT D -- DELAWARE STOCKHOLDER APPRAISAL RIGHTS....................................  D-1
EXHIBIT E -- CERTIFICATE OF AMENDMENT.................................................  E-1
EXHIBIT F -- 1995 STOCK OPTION PLAN...................................................  F-1
</TABLE>
    
 
                                        v
<PAGE>   12
 
                                    SUMMARY
 
     The following summary is qualified in its entirety by the detailed
information appearing elsewhere in this Proxy Statement/Prospectus. Stockholders
are urged to review the entire Proxy Statement/Prospectus and the Exhibits
thereto. Capitalized terms used and not otherwise defined in this summary have
the meanings given them elsewhere in this Proxy Statement/Prospectus. Unless
otherwise indicated, the information in this Proxy Statement/Prospectus assumes
that the exchange ratio will equal 3.7744.
 
                              THE PROPOSED MERGER
 
GENERAL
 
     This Proxy Statement/Prospectus relates to the proposed merger (the
"Merger") of ACCESS with and into Chemex, pursuant to that certain Agreement of
Merger and Plan of Reorganization, dated as of October 3, 1995, as amended and
restated as of October 31, 1995 (the "Merger Agreement"), by and between Chemex
and ACCESS. At the later of such time as the Certificate of Merger required
under the Delaware General Corporation Law is filed with the Secretary of State
of the State of Delaware and the Articles of Merger required under the Texas
Business Corporation Act are filed with the Secretary of State of the State of
Texas (the "Effective Time"), each outstanding share of ACCESS Common Stock will
be converted into the right to receive, and become exchangeable for (as adjusted
pursuant to the Merger Agreement, the "Conversion Number"), 3.7744 shares of
Chemex Common Stock; provided, however, that, if at the Effective Time the Total
Cash Assets (as such term is defined in the Merger Agreement) of Chemex are less
than the Minimum Cash Assets (as such term is defined in the Merger Agreement),
then, for each one dollar that the Total Cash Assets are less than the Minimum
Cash Assets, each share of ACCESS Common Stock will be converted into the right
to receive, and become exchangeable for an additional .0000003635 shares of
Chemex Common Stock (the "Net Cash Adjustment").
 
SPECIAL MEETING OF CHEMEX STOCKHOLDERS
 
   
     At the Special Meeting in Lieu of the 1995 Annual Meeting of the
Stockholders of Chemex, or any adjournment or postponement thereof (the "Special
Meeting"), the stockholders of Chemex (the "Chemex Stockholders") will be asked
to consider and vote upon proposals to (i) approve and adopt the Merger
Agreement and the transactions contemplated thereby, (ii) approve an amendment
to Chemex's Certificate of Incorporation increasing Chemex's authorized shares
of Chemex Common Stock and Chemex Preferred Stock; (iii) approve an amendment to
Chemex's Certificate of Incorporation to change Chemex's name to "ACCESS
Pharmaceuticals, Inc."; (iv) approve the establishment of Chemex's 1995 Stock
Option Plan; (v) ratify the selection by the Chemex Board of Directors of
Chemex's independent auditors; (vi) elect three directors; and (vii) approve an
adjournment of the Special Meeting, if necessary, to permit further solicitation
of proxies in the event that there are not enough votes present at the Special
Meeting to consider and approve any or all of the above proposals. The Special
Meeting is scheduled to be held at 10:00 A.M., local time, on January 23, 1996,
at                               . The Chemex Board has fixed the close of
business on December 15, 1995 as the record date (the "Record Date") for the
determination of holders of Chemex Common Stock entitled to receive notice of
and to vote at the Special Meeting. See "The Special Meeting."
    
 
     The Board of Directors of Chemex does not specifically know of any matters
which will be brought before the Special Meeting other than those matters
specifically set forth in the Notice of Special Meeting. However, if any other
matter properly comes before the Special Meeting, it is intended that the
persons named in the enclosed form of Proxy, or their substitutes acting
thereunder, will vote on any such matter in accordance with their best judgment.
 
     THE CHEMEX BOARD OF DIRECTORS WITHOUT DISSENT HAS APPROVED THE MERGER
AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY AND RECOMMENDS THAT THE
CHEMEX STOCKHOLDERS VOTE "FOR" THE PROPOSAL TO APPROVE AND ADOPT THE MERGER
AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY.
<PAGE>   13
 
     THE CHEMEX BOARD WITHOUT DISSENT HAS ALSO APPROVED CHEMEX'S 1995 STOCK
OPTION PLAN AND THE PROPOSED AMENDMENTS TO CHEMEX'S CERTIFICATE OF
INCORPORATION, SELECTED CHEMEX'S INDEPENDENT AUDITORS AND DESIGNATED EACH OF THE
NOMINEES FOR ELECTION AS DIRECTORS. THE CHEMEX BOARD RECOMMENDS THAT THE CHEMEX
STOCKHOLDERS VOTE "FOR" THE PROPOSALS TO APPROVE CHEMEX'S 1995 STOCK OPTION PLAN
AND THE AMENDMENTS TO CHEMEX'S CERTIFICATE OF INCORPORATION, "FOR" RATIFICATION
OF ITS SELECTION OF CHEMEX'S INDEPENDENT AUDITORS AND "FOR" THE ELECTION OF EACH
OF THE NOMINEES AS A DIRECTOR. SEE "THE PROPOSED MERGER -- RECOMMENDATIONS OF
THE BOARDS OF DIRECTORS AND REASONS FOR THE MERGER -- CHEMEX," "PROPOSAL TO
APPROVE CHEMEX'S 1995 STOCK OPTION PLAN," "PROPOSALS TO AMEND CHEMEX'S
CERTIFICATE OF INCORPORATION" AND "RATIFICATION OF SELECTION OF INDEPENDENT
AUDITORS."
 
THE PARTIES
 
  Chemex
 
     Until July 1995, Chemex developed medications for the treatment of skin
diseases. However, as of July 31, 1995, Chemex announced that it had concluded
its research and development operations and, instead, was commencing efforts to
locate a merger partner. On September 21, 1995, Chemex sold all of its rights to
Amlexanox to Block Drug Company ("Block") for a nonrefundable upfront payment of
$2,500,000 plus future royalties for sales of Amlexanox by Block. See "Business
of Chemex." As a result of such sale, Chemex currently has no near-term product
offerings and has ceased all of its research and development operations. Chemex
was incorporated in 1974 as Chemex Corporation, a Wyoming corporation, and in
1983 changed its name to Chemex Pharmaceuticals, Inc. Chemex changed its state
of incorporation from Wyoming to Delaware on June 30, 1989. Chemex's principal
executive office is located at 660 White Plains Road, Suite 400, Tarrytown, New
York 10591.
 
  ACCESS
 
     ACCESS is focused on the enhanced delivery of parenteral therapeutic and
diagnostic imaging agents through the utilization of its patented and
proprietary endothelial binding technology which selectively targets sites of
disease. The therapeutic focus of ACCESS is developing proprietary
pharmaceuticals for the treatment of cancer and life-threatening infections and
the diagnosis and staging of cancer. ACCESS is classified as a development stage
enterprise for accounting purposes. ACCESS was incorporated in 1988 as a Texas
corporation. ACCESS' principal executive office is located at 2600 N. Stemmons
Freeway, Suite 210, Dallas, Texas 75207.
 
REQUIRED VOTE
 
  Chemex
 
     The affirmative vote of the majority of shares of Chemex Common Stock
present, either in person or presented by proxy, at the Special Meeting is
required to approve and adopt each of the matters presented for stockholder
approval at the Special Meeting with the exception of the proposals to approve
and adopt the Merger Agreement and the transactions contemplated thereby and to
amend Chemex's Certificate of Incorporation, which require the affirmative vote
of a majority of all of the outstanding shares of Chemex Common Stock entitled
to vote thereon. At the Record Date there were shares of Chemex Common Stock
outstanding. Chemex has no other outstanding voting securities. The presence,
either in person or represented by proxy, of the holders of a majority of the
shares of Chemex Common Stock outstanding as of the Record Date is necessary to
constitute a quorum at the Special Meeting. As of the Record Date, Chemex's
directors, executive officers and their respective affiliates as a group held
shares representing approximately 14.4% of the votes entitled to be cast by
Chemex Stockholders at the Special Meeting. See "The Special Meeting -- Voting
Rights."
 
     Chemex Stockholders have the right to vote cumulatively for the election of
directors. This means that in the voting at the Special Meeting each Chemex
Stockholder, or his proxy, may multiply the number of his shares by three (the
number of directors to be elected) and then cast the resulting total number of
votes for a single nominee, or distribute such votes on the ballot among the
nominees as desired. The proxies submitted to
 
                                        2
<PAGE>   14
 
the Board of Directors in response to this solicitation may, in the discretion
of the proxy holder, cumulate the votes of the shares they represent. However,
the Board of Directors requires any Chemex Stockholder otherwise electing to
exercise his cumulative voting rights, if voting in person, to so indicate prior
to the beginning of the Special Meeting or, if voting by proxy given to someone
other than those designated by the Board of Directors in this solicitation, to
so indicate on said proxy.
 
     Chemex Stockholders do not have appraisal or dissenter's rights with regard
to the proposal to approve and adopt the Merger Agreement. See "The Proposed
Merger -- Appraisal Rights." In addition, Chemex Stockholders do not have
appraisal or dissenter's rights in connection with any other matters to be acted
on at the Special Meeting.
 
  ACCESS
 
     The affirmative vote of a majority of shares of ACCESS Common Stock issued
and outstanding is required to approve and adopt the Merger Agreement and the
transactions contemplated thereby. The presence, either in person or represented
by proxy, of the holders of a majority of the shares of ACCESS Common Stock is
necessary to constitute a quorum at a meeting of the stockholders of ACCESS. As
of the Record Date, ACCESS' directors, executive officers and their respective
affiliates as a group held approximately 72.8% of the votes entitled to be cast
by ACCESS Stockholders at a meeting of the Stockholders of ACCESS.
 
     ACCESS Stockholders have appraisal rights with regard to the approval and
adoption of the Merger Agreement. See "The Proposed Merger -- Appraisal Rights."
It is a condition to Chemex's obligations under the Merger Agreement that Merger
or otherwise waive or fail to perfect any appraisal rights they may be entitled
to under the Texas Business Corporation Act. See "Proposed Merger
Agreement -- Conditions." Pursuant to a Letter Agreement, dated as of September
1, 1995, Dr. David F. Ranney, who as of the Record Date was the beneficial owner
of approximately 64.8% of the issued and outstanding shares of ACCESS Common
Stock ("Dr. David Ranney") and is a director and the executive vice president of
ACCESS, agreed, subject to certain conditions, to vote (or to consent) all of
the shares of ACCESS Common Stock for which he had voting power in favor of any
proposal to approve and adopt the Merger Agreement. See "Certain Relationships
and Related Transactions -- Chemex" and "The Proposed Merger -- Appraisal
Rights."
 
  General
 
     All issued and outstanding shares of ACCESS Common Stock will be converted
into Chemex Common Stock upon the effectiveness of the Merger. At the Effective
Time, ACCESS will be merged with and into Chemex and ACCESS will cease to exist
as a separate entity. Chemex will be the surviving corporation of the Merger.
Immediately after the Merger, the Chemex Stockholders will own approximately 40%
of the Chemex Common Stock and the ACCESS Stockholders will own approximately
60% of the Chemex Common Stock.
 
  Consideration
 
     At the Effective Time, the stockholders of ACCESS will receive, in the
aggregate, approximately 13,750,000 shares of Chemex Common Stock (excluding any
shares of Chemex Common Stock issuable upon exercise of any of the warrants
described below), subject to adjustment as described in the Merger Agreement,
including, without limitation, the Net Cash Adjustment. In addition, on the
achievement of certain milestones as set forth in the Merger Agreement, holders
of ACCESS Common Stock as of the Effective Time will be issued up to an
aggregate of 750,000 warrants exercisable for the purchase of one share of
Chemex Common Stock with a five-year expiration from the date of issue at an
exercise price of $0.75 per share. See "The Proposed Merger -- Additional
Consideration."
 
  Conversion of Shares
 
     At the Effective Time, each then outstanding share of ACCESS Common Stock
will be converted into the right to receive, and become exchangeable for
(subject to adjustment as provided in the Merger
 
                                        3
<PAGE>   15
 
Agreement), 3.7744 shares of Chemex Common Stock; provided, however, that if at
the Effective Time the Total Cash Assets of Chemex are less than the Minimum
Cash Assets, then, for each one dollar that the Total Cash Assets are less than
the Minimum Cash Assets, each share of ACCESS Common Stock will be converted
into the right to receive, and become exchangeable for an additional .0000003635
shares of Chemex Common Stock.
 
  Conversion of Warrants
 
     At the Effective Time, each then outstanding warrant to purchase ACCESS
Common Stock will be deemed to be a warrant to purchase from Chemex up to that
whole number of shares of Chemex Common Stock determined by multiplying the
number of shares of ACCESS Common Stock subject to such warrant by the
Conversion Number (subject to adjustment as provided in the Merger Agreement,
including the Net Cash Adjustment), at the price per share determined by
dividing the purchase price per share of ACCESS Common Stock provided for in
such warrant by the Conversion Number (subject to adjustment as provided in the
Merger Agreement, including the Net Cash Adjustment). Except for the foregoing,
each such warrant shall remain subject after the Effective Time to the same
terms and conditions as were applicable to such warrant immediately prior to the
Effective Time.
 
EFFECTIVE TIME
 
     After all of the conditions set forth in the Merger Agreement have been
satisfied or waived, the Merger will become effective at the later of such time
as (i) the Certificate of Merger required under the Delaware General Corporation
Law is accepted for filing with the Secretary of State of the State of Delaware
and (ii) the Articles of Merger required under the Texas Business Corporation
Act are accepted for filing by the Secretary of State of the State of Texas.
Such filings will be made simultaneously with or as soon as practicable after
the closing of the transactions contemplated by the Merger Agreement. See "The
Proposed Merger -- Closing; Effective Time."
 
   
VALUATION
    
 
   
     In excess of $8 million has been invested in the development of the ACCESS
technology since ACCESS was formed. Prior to this, significant research work had
been performed over a number of years at the University of Texas Southwestern
Medical Center which resulted in the filing of the initial patents which
established the technology platform of ACCESS. (See "Business of ACCESS")
    
 
   
     ACCESS has been in discussions with numerous potential investors who had
indicated a valuation range which supports the $10 million ascribed to ACCESS
(See "Chemex and ACCESS Pro Forma Financial Information"). This valuation takes
into account comparable venture capital valuations of other biotechnology
companies at a similar stage of development with product candidates which would
compete in similar sized market segments and are at approximately the same stage
of product development. Therefore the number of shares of Chemex Common Stock to
be issued pursuant to the Merger is based on this valuation. (See "The Exchange
Ratio").
    
 
BACKGROUND OF THE MERGER
 
     The purpose of the Merger is to inject new technology into Chemex, increase
the technology breadth of Chemex in areas that represent major commercial
opportunities and provide the facilities necessary to advance Chemex's research
and development efforts. Chemex believes that both the current dermatology
portfolio and the carbohydrate technology of ACCESS are commercially viable and
that products from these technologies can be developed and brought to market
more efficiently in one company. However, these efforts will require substantial
capital, management and development skills, and facilities which Chemex
currently does not have. The Merger is designed to provide the facilities, a
portion of the necessary capital and the basis to build the required management
and development skills. See "Business of ACCESS."
 
     The Merger was approved by the Board of Directors of Chemex only after it
had considered and dismissed the feasibility of other alternatives.
 
                                        4
<PAGE>   16
 
     As of July 31, 1995, Chemex announced that it had ceased its research and
development operations and, instead, was commencing efforts to locate a merger
partner for Chemex. In spite of some preliminary discussions with numerous
potential merger partners and advanced discussions with a number of such
potential partners, all such efforts were ultimately unsuccessful. Other
alternatives considered by the Board also proved unfruitful, including
discussions with certain small biotechnology companies that had expressed
interest in the possible consolidation of activities. In a number of cases
discussions were terminated due to excessive demands of the potential partner
that would have resulted in the under-valuation of Chemex and consequently
resulted in significantly greater dilution of the current Chemex Stockholders.
 
     In July 1995 the possibility of merging with ACCESS was first discussed by
representatives of ACCESS and Chemex. By the end of July draft terms and
conditions were outlined. During August and September the parties worked out the
details which led to Chemex Board of Directors' approval in principal on
September 14, 1995 and the signing of the Merger Agreement on October 3, 1995,
which Merger Agreement was amended and restated by the parties as of October 31,
1995. See "Conflicts of Interest."
 
     On September 21, 1995, Chemex sold all of its rights in the drug Amlexanox
to Block for a nonrefundable upfront royalty payment of $2,500,000 plus future
royalties from sales of Amlexanox. As a result of such sale, Chemex currently
has no near-term product opportunity in addition to having ceased all of its
research and development operations. Further, Chemex has been unsuccessful in
its attempt to raise additional equity financing over the past three years which
reflects the general difficulty of biotechnology and pharmaceutical research and
development companies in obtaining such financing, and the specific difficulties
of dermatology-based companies competing for equity funding against what are
perceived to be more exciting technologies with significantly larger commercial
opportunities.
 
     Chemex's merger objective was either to associate with a third party that
had adequate financial resources to continue the research and development of
Chemex's dermatology drugs or with a company with technology that would give the
Chemex Stockholders some "upside" possibility in terms of share value. During
the evaluation period, Chemex explored with no success numerous possible
opportunities for a merger with companies specializing in dermatology and
companies with technology developments. Commencing in July 1995, Chemex
discussed the possibility of, and then negotiated, the Merger and the other
transactions contemplated by the Merger Agreement with ACCESS. The terms of the
Merger Agreement resulted from arm's length negotiations between representatives
of Chemex and ACCESS. The Chemex Board of Directors without dissent approved the
Merger Agreement and the transactions contemplated thereby, the amendments to
the Certificate of Incorporation of Chemex, and the establishment of the 1995
Stock Option Plan, and selected Chemex's independent auditors and designated the
nominees for election of directors at a meeting on September 14, 1995.
 
     If the Merger is not approved at the Special Meeting or is not consummated
for any other reason, Chemex will have a limited number of alternatives. As
noted above, Chemex has discontinued all research and development activities.
Based upon its past failures to divest itself or merge with another dermatology
company, Chemex's ability to merge with another technology company with similar
upside potential of ACCESS is considered by Chemex to be unlikely. Furthermore,
Chemex's Board of Directors concluded that Chemex would be unlikely to locate a
technology or merger partner that would offer terms and conditions as favorable
as those reflected in the Merger Agreement. Finally, Chemex believes that
liquidation of Chemex would be a less desirable alternative since the only asset
of Chemex whose value would be realized over time would be the right to receive
royalties from the sale of Amlexanox by Block. See "The Proposed Merger --
Background of the Merger."
 
   
THE EXCHANGE RATIO
    
 
   
     In determining the Exchange Ratio, the management of Chemex and ACCESS
recognized that the market price of the Chemex Common Stock when the transaction
was being negotiated did not reflect the potential returns from the Chemex
portfolio. Consequently, the valuation of Chemex reflected an evaluation of the
revenue potential of the products under development and the competitive offers
that had been preliminarily negotiated with other merger candidates. This
valuation resulted in a $.75 per share of Chemex
    
 
                                        5
<PAGE>   17
 
   
Common Stock ascribed value. (See "Business of Chemex," "The Proposed
Merger -- Background to the Merger," "The Proposed Merger -- Reasons for the
Merger").
    
 
   
     The exchange ratio took into account the relative market potential of both
Chemex and ACCESS recognizing that not only are opportunities in dermatology
(Chemex) relatively small compared with oncology opportunities (ACCESS), but the
ability to interest investors and the premium an investor will pay for a company
that competes in large therapeutic categories is much greater. (See "Business of
ACCESS," "Chemex and ACCESS Pro Forma Financial Information" and "Valuation").
    
 
   
     Based on the relative valuation of both companies, this resulted in an
exchange ratio of 3.7744, subject to adjustment pursuant to the terms of the
Merger Agreement. (See "Valuation," "Chemex and ACCESS Pro Forma Financial
Information" and "The Proposed Merger -- The Merger Agreement").
    
 
OPERATIONS OF THE COMPANY AFTER THE MERGER
 
     The consolidated operations will be located at ACCESS' facilities in
Dallas, Texas immediately after the consummation of the Merger and the ACCESS
management will become the management of Chemex. See "Management -- Chemex" and
"Management -- ACCESS."
 
RECOMMENDATIONS OF THE BOARD OF DIRECTORS
 
     On September 14, 1995, the Board of Directors of Chemex without dissent
approved the Merger Agreement and the transactions contemplated thereby. The
Board of Directors of Chemex recommends that the Chemex Stockholders vote
"FOR"approval and adoption of the Merger Agreement and the transactions
contemplated thereby. See "Conflicts of Interest."
 
     The recommendation of the Board of Directors of Chemex is based upon its
belief that the terms of the Merger are fair and in the best interests of Chemex
and the Chemex Stockholders and that the Merger will result in benefits to the
Chemex Stockholders. For a discussion of the factors considered by the Board of
Directors of Chemex in making its recommendation, see "The Proposed
Merger -- Recommendation of the Board" and "Reasons for the Merger."
 
OPINION OF FINANCIAL ADVISOR
 
     The Board of Directors of Chemex retained Advisory Capital Partners in
September 1995 to render an opinion, from a financial point of view, with
respect to the fairness of the Merger to the Chemex Stockholders. In its role as
financial advisor to Chemex, Advisory Capital Partners has delivered its written
opinion to the Chemex Board of Directors, a copy of which is attached hereto as
Exhibit B (the "Fairness Opinion"), to the effect that, as of the date of the
opinion, and based upon and subject to the matters set forth in the opinion, the
Merger is fair, from a financial point of view, to the Chemex Stockholders. The
Fairness Opinion is necessarily based on market, economic and other conditions
as they existed on the date Advisory Capital Partners delivered its opinion, the
information made available to Advisory Capital Partners as of such date and the
review and analysis conducted by Advisory Capital Partners as of such date. The
summary of the Fairness Opinion set forth in this Proxy Statement/Prospectus is
qualified in its entirety by reference to the full text of the opinion, a copy
of which is attached hereto as Exhibit B. See "The Proposed Merger -- Opinion of
Financial Advisor." and Exhibit B hereto.
 
CONDITIONS OF THE MERGER
 
     The obligations of Chemex and ACCESS to consummate the Merger are subject
to the satisfaction or waiver of a number of conditions, including the approval
and adoption of the Merger Agreement and transactions contemplated thereby by
the stockholders of Chemex and ACCESS. See "The Proposed Merger -- The Merger
Agreement -- Conditions to the Merger."
 
                                        6
<PAGE>   18
 
RIGHTS TO TERMINATE AND AMENDMENTS
 
     The Merger Agreement may be terminated prior to the closing of the
transactions contemplated thereby under certain circumstances. If the Merger
Agreement is terminated, under certain circumstances either Chemex or ACCESS may
be obligated to pay to the other a break-up fee. See "The Proposed Merger -- The
Merger Agreement -- Amendment and Termination; Waivers" and "Break-up Fees."
 
     Subject to compliance with applicable law, the Merger Agreement may be
amended at any time by a written agreement executed by Chemex and ACCESS. See
"The Proposed Merger -- The Merger Agreement -- Amendment and Termination;
Waivers."
 
COMPARISON OF RIGHTS UNDER APPLICABLE LAW
 
     The rights of ACCESS Stockholders are currently governed by the Texas
Business Corporation Act, ACCESS' Articles of Organization and ACCESS' Bylaws.
Holders of ACCESS Common Stock immediately before the Effective Time will become
Chemex Stockholders at the Effective Time, and from and after the Effective
Time, their rights as Chemex Stockholders will be governed by the Delaware
General Corporation Law, Chemex's Certificate of Incorporation and Chemex's
Bylaws. For a discussion of the significant differences between the rights of
ACCESS Stockholders under the Texas Business Corporation Act, the ACCESS
Articles of Organization and the ACCESS Bylaws and the rights of Chemex
Stockholders under the Delaware General Corporation Law, the Chemex Certificate
of Incorporation and the Chemex Bylaws, see "Comparison of Rights of Holders of
ACCESS Common Stock and Chemex Common Stock."
 
CERTAIN INCOME TAX CONSEQUENCES OF THE MERGER
 
     It is expected that the Merger will constitute a reorganization for federal
income tax purposes and, accordingly, that no gain or loss will be recognized by
the Chemex Stockholders or the ACCESS Stockholders. See "The Proposed
Merger -- Certain Federal Income Tax Considerations."
 
ABSENCE OF REGULATORY FILINGS AND APPROVALS
 
     No federal or state regulatory requirements, including without limitation
the requirements of the Hart-Scot-Rodino Antitrust Improvements Act of 1976, and
the rules and regulations thereunder, need be complied with nor approval
obtained in connection with the Merger.
 
ADJOURNMENT OF THE SPECIAL MEETING
 
     In the event that there do not appear to be sufficient votes to consider
and approve the proposals to be considered at the Chemex Special Meeting, such
proposals could not be approved unless the Special Meeting were adjourned in
order to permit further solicitation of proxies. In order to allow proxies that
have been received by Chemex at the time of the Special Meeting to be voted for
adjournment, if necessary, Chemex has submitted the question of adjournment
under such circumstances to its stockholders as a separate matter for their
consideration.
 
STOCKHOLDER'S AGREEMENT
 
     It is a condition to Chemex's obligations under the Merger Agreement that,
prior to the closing of the transactions contemplated by the Merger Agreement,
Dr. David Ranney execute and deliver to Chemex a Stockholder's Agreement
providing for, among other matters; an agreement to amend that certain Patent
Purchase Agreement, dated as of April 5, 1994, between Dr. David Ranney and
ACCESS, regarding certain royalties payable to Dr. David Ranney relating to
certain technology and intellectual property of ACCESS; and an agreement,
subject to certain conditions, by Dr. David Ranney not to sell, transfer or
otherwise dispose of his shares of the capital stock of Chemex for a period of
six months following the Effective Time of the Merger. Such Agreement also
provides for certain rights of Dr. David Ranney to be nominated or to have his
nominee nominated for election to the Board of Directors of Chemex at any
election of Chemex directors; a right of first refusal of Dr. David Ranney to
license or purchase certain technology and intellectual property of
 
                                        7
<PAGE>   19
 
Chemex under certain conditions. Such Stockholder's Agreement was executed and
delivered to Chemex by Dr. David Ranney on October 3, 1995. "See Certain
Relationships and Related Transactions -- Chemex" and "The Proposed
Merger -- Stockholder's Agreement."
 
LOAN TO ACCESS.
 
     Pursuant to the terms of the Merger Agreement, Chemex is obligated to loan,
at any time prior to the Drop Dead Date, an aggregate amount of up to $250,0000
to ACCESS, upon the request of ACCESS. On October 4, 1995, Chemex made a loan to
ACCESS of $100,000 which is evidenced by a Convertible Promissory Note,
convertible at Chemex's option upon a default under the Note into shares of
Series A Convertible Preferred Stock of ACCESS.
 
RISK FACTORS
 
     In considering whether to approve and adopt the Merger Agreement and the
transactions contemplated thereby, the Chemex Stockholders and the ACCESS
Stockholders should consider, in addition to the other information in this Proxy
Statement/Prospectus the risks described in the section herein entitled "Risk
Factors."
 
                                        8
<PAGE>   20
 
                                  RISK FACTORS
 
     In addition to the other information contained in this Proxy
Statement/Prospectus, Chemex Stockholders and ACCESS Stockholders should review
carefully the following factors in deciding whether to vote in favor of approval
of the Merger Agreement and the transactions contemplated thereby.
 
     Risks Associated with Conversion Number.  The Merger Agreement provides
that upon consummation of the Merger, each share of ACCESS Common Stock will be
exchanged for 3.7744 shares of Chemex Common Stock (subject to adjustments as
provided in the Merger Agreement). However, the Conversion Number is not subject
to adjustment if the fair market value of the Chemex Common Stock at the
Effective Time is different from that contemplated by the management of Chemex
and ACCESS in the negotiation of the Conversion Number. As the price of Chemex
Common Stock at the Effective Time may vary from the price as of the date on
which the Merger Agreement was executed due to changes in the business,
operations and prospects of Chemex, general market and economic conditions, and
other factors, the market value of the shares of Chemex Common Stock which
holders of ACCESS Common Stock will receive pursuant to the Merger may be
greater or less than the market value of such Chemex Common Stock as of the date
of the Merger Agreement. See "The Proposed Merger -- The Merger Agreement."
 
     Possible Volatility of Stock Price.  Stock prices for many technology
companies fluctuate widely for reasons which may be unrelated to operating
performance or new product or service announcements. Broad market fluctuations,
earnings and other announcements of other companies, general economic conditions
or other matters unrelated to Chemex and outside its control also could affect
the market price of the Chemex Common Stock. See "Comparative Per Share Prices
and Dividends of Chemex Common Stock and ACCESS Common Stock."
 
   
     Concentration of Ownership.  Dr. David Ranney currently beneficially owns
approximately 64.8% of the issued and outstanding ACCESS Common Stock and will
thus beneficially own, immediately after the Effective Time, approximately 40%
of the issued and outstanding Chemex Common Stock. As a result, Dr. David Ranney
will, subject to the terms of the Stockholder's Agreement which provides that so
long as he beneficially owns fifteen percent or more of the capital stock of
Chemex, Dr. David Ranney will, subject to certain conditions and exceptions,
vote all of his shares of the capital stock of Chemex as recommended by the
Board of Directors of Chemex for any proposal presented to the Chemex
Stockholders for approval, effectively have the ability to determine all matters
requiring approval by stockholders, including the election of Directors, and
therefore to control the Company and direct its affairs and business and control
the disposition of the Company. See "Security Ownership of Certain Beneficial
Owners and Management -- Chemex in "Security Ownership of Certain Beneficial
Access and Management -- ACCESS," "Management -- Chemex,"
"Management -- ACCESS," "Certain Relationships and Related
Transactions -- Chemex" and "The Proposed Merger -- Stockholder's Agreement."
    
 
   
     Research and Development Focus.  Since its inception, Chemex has been
engaged exclusively in drug research and development although it is not
currently accounted for as a "development stage" Company. ACCESS' focus has been
on commercializing proprietary biopharmaceutical patents. Although ACCESS is
projected to have royalty income it is still in the development stage, and its
proposed operations are subject to all the risks inherent in the establishment
of a new business enterprise, including the need for substantial capital. ACCESS
has recorded minimal revenue to date. In addition, royalties received by Chemex
for sales of Actinex(R) and Amlexanox have not been significant to date. If the
Merger is consummated, it is anticipated that Chemex will resume research and
development activities and will remain principally engaged in research and
development activities for an indeterminate, but substantial, period of time. As
a non-revenue producing company, normal credit arrangements are unavailable to
Chemex and, therefore, it is likely that Chemex would be forced to accept
unfavorable terms if it should attempt to raise additional needed funds through
borrowing. There can be no assurance that any such credit arrangements would be
available. Further, it is anticipated that additional losses will be incurred in
the future, and there can be no assurances that Chemex will ever achieve
significant revenues.
    
 
     Uncertainties Associated with Research and Development Activities.  As of
July 31, 1995, Chemex ceased all research and development activities pending the
consummation of the Merger. In addition, Chemex
 
                                        9
<PAGE>   21
 
currently has no commercially viable products. The products of ACCESS are still
in preclinical testing. See "Business of ACCESS." While the results of these
preclinical tests are promising, ACCESS has yet to file an IND (Investigative
New Drug Application) with the FDA (Food and Drug Administration) and begin
human clinical trials. There is no guarantee that the FDA will approve ACCESS'
filing of an IND. Although, if the Merger is consummated it is currently
intended that research and development activities will resume, research and
development activities, by their nature, preclude definitive statements as to
the time required and costs involved in reaching certain objectives. Actual
research and development costs, therefore, could exceed budgeted amounts and
estimated time frames may require extension. Cost overruns due to unanticipated
regulatory delays or demands, unexpected adverse side effects or insufficient
therapeutic efficacy will prevent or substantially slow the research and
development effort and ultimately could have a material adverse effect on
Chemex.
 
     Absence of Operating Revenue.  Chemex has generated no operating revenue in
the past, except contract research income. There can be no assurance of revenue
or profits in the future. Chemex currently has no products approved for sale and
there can be no assurance as to the expenditures of time and resources that may
be required to complete the development of potential Chemex products and obtain
approval for sale or if such completion and approval can be realized. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "Financial Statements."
 
     History of Losses.  Chemex has sustained net operating losses since its
inception. ACCESS has sustained net operating losses since its inception in
1989. See "Future Capital Requirements." Since the development and
commercialization of new products (including current ACCESS products) will
require substantial expenditures for the foreseeable future, Chemex expects to
incur further losses. If Chemex's losses continue, its ability to continue its
operations will depend upon its ability to secure additional funds. Chemex's
revenue trend and future additional cash needs may display significant
variations due to the introduction of new research and development agreements
and licensing arrangements, the completion or termination of those agreements
and arrangements, the timing and amounts of milestone payments, and the timing
of regulatory approvals and market introduction of products. See "Future Capital
Requirements."
 
     Future Capital Requirements.  Chemex will require substantial funds for its
research and product development programs, the pursuit of regulatory approvals,
operating expenses, working capital and expansion of it production capabilities.
There can be no assurance that Chemex will be profitable in the future and if
Chemex has sufficient funds for its capital needs, there can be no assurance
that additional funds can be obtained on acceptable terms, if at all. If
necessary funds are not available, Chemex's business would be materially
adversely affected.
 
     Net Operating Loss Carryforwards.  Chemex and ACCESS each currently enjoy
the benefit of significant Net Operating Loss Carryforwards (the "Tax
Benefits"). A change of control (as defined in the applicable Internal Revenue
Service regulations) of either Chemex or ACCESS could result in the loss or a
significant limitation upon the use of most of the Tax Benefits for such party.
The Merger could be deemed to be a change in control of Chemex and/or ACCESS
which could result in the loss or a significant limitation on the use of most of
the Tax Benefits of Chemex and/or ACCESS.
 
     Protection of Proprietary Technology.  Chemex's ability to compete
effectively with other companies will depend, in part, on its ability to
maintain the proprietary nature of its technology. Although ACCESS has been
awarded eight patents involving glycosaminoglycan, acidic saccharide,
carbohydrate and other endothelial-binding and targeting carriers in combination
with drugs and diagnostic agents formulated by both physical and chemical
covalent means; and eight applications are pending, there can be no assurance
that these patents will not be declared invalid or circumvented, or that pending
patents will be issued. In addition, there may be other patents issued covering
technologies and products which may be required by Chemex to manufacture, use or
sell any potential products. There can be no assurance that Chemex could obtain
a license under any such patent on commercially acceptable terms or at all.
Chemex currently relies on unpatented proprietary technology and there can be no
assurance that others may not independently develop the same or similar
technology or otherwise obtain access to Chemex's proprietary technology. To
protect their rights in these areas, both ACCESS and Chemex generally require
their respective employees, consultants, advisors
 
                                       10
<PAGE>   22
 
and collaborators to enter into confidentiality agreements. There can be no
assurance, however, that these agreements will provide meaningful protection for
Chemex's or ACCESS' trade secrets, know-how or other proprietary information in
the event of any unauthorized use or disclosure of such trade secrets, know-how
or other proprietary information. Litigation may be necessary to protect trade
secrets or know-how currently owned by Chemex or ACCESS or to determine the
scope and validity of the proprietary rights of others and could result in
substantial cost and diversion of effort by Chemex.
 
     Regulation by Government Agencies.  The pharmaceutical industry is subject
to regulation by the FDA and comparable agencies in foreign countries prior to
commercial marketing. The process of obtaining approvals from such agencies for
any potential products of Chemex can be costly, complicated and time consuming
and there can be no assurance that such approvals will be granted on a timely
basis, if ever. The regulatory process may delay the marketing of any new
products for lengthy periods, impose substantial additional costs and furnish an
advantage to competitors who have greater financial resources. In addition, the
extent of potentially adverse governmental regulations which might arise from
future legislative, administrative or judicial action cannot be determined.
Chemex cannot predict at this time what effect FDA actions may have on the
approval process to which Chemex's potential products may be subject.
 
     Drug-related Risks.  Adverse side effects of treatment of diseases and
disorders in both human and animal patients are business risks in the
pharmaceutical industry. Adverse side effects can occur during the clinical
testing of a new drug on humans or animals which may delay ultimate FDA approval
or even cause a company to terminate its efforts to develop the drug for
commercial use. Even after FDA approval of an NDA, adverse side effects may
develop to a greater extent than anticipated during the clinical testing phase
and could result in legal action against a company. Drug developers and
manufacturers, including Chemex, may face substantial liability for damages in
the event of adverse side effects or product defects identified with their
products used in clinical tests or marketed to the public. There can be no
assurance that Chemex will be able to satisfy any claims for which it may be
held liable resulting from the use or misuse of products which it has developed,
manufactured or sold.
 
     Product Liability.  The testing, marketing and sale of pharmaceutical
products entail an inherent risk of allegations of product liability and there
can be no assurance that product liability claims will not be asserted against
Chemex. Although Chemex maintains a limited amount of product liability
insurance, there can be no assurance that Chemex has, or will be able to
maintain, sufficient insurance coverage or will have sufficient resources to
satisfy any liability resulting from any potential claims. Any successful
product liability claims made against Chemex in excess of its insurance coverage
could substantially reduce or eliminate any stockholders' equity Chemex may have
and could have a material adverse effect on Chemex.
 
     Market Impact of Future Sales of Chemex Common Stock.  Sales of substantial
amounts of shares of Chemex Common Stock in the public market following the
Merger could adversely affect the market price of the Chemex Common Stock. As of
the date of this Proxy Statement/Prospectus, 8,736,000 shares of Chemex Common
Stock are unrestricted and freely tradable.
 
     Upon consummation of the Merger, approximately 13,750,000 additional shares
(excluding shares issuable upon exercise of any warrants) of Chemex Common Stock
(the "Merger Shares") will be outstanding. Merger Shares owned by nonaffiliates
of ACCESS (approximately 3,700,000 shares) will be eligible for sale immediately
after consummation of the Merger.
 
     Dr. David Ranney, Chairman of the Board and Executive Vice President of
ACCESS, Herbert H. McDade and Kerry Gray, Chief Executive Officer and President
of ACCESS, have entered into Lock-Up Agreements with Chemex pursuant to which
each of them may not sell any shares of the capital stock of Chemex owned by
them for a period of six months following the Effective Time of the Merger.
 
     Upon consummation of the Merger, there also will be outstanding options,
warrants and rights to purchase up to 2,072,307 shares of Chemex Common Stock.
The sale of a substantial amount of these shares could have an adverse effect on
the future market price of Chemex Common Stock. See "Principal Stockholders of
ACCESS" and "Principal Stockholders of Chemex."
 
                                       11
<PAGE>   23
 
     Effect of Certain Charter and By-Law Provisions; Possible Issuance of
Preferred Stock.  Chemex's Certificate of Incorporation and Bylaws contain
provisions that may discourage acquisition bids for Chemex. This could limit the
price that certain investors might be willing to pay in the future for shares of
Chemex Common Stock. In addition, shares of Chemex Preferred Stock may be issued
in the future without further stockholder approval and upon such terms and
conditions, and having such rights, privileges and preferences, as the Board of
Directors may determine (including, for example, rights to convert into Chemex
Common Stock). The rights of the holders of Chemex Common Stock will be subject
to, and may be adversely affected by, the rights of the holders of any Chemex
Preferred Stock now existing and that may be issued in the future. The issuance
of Chemex Preferred Stock, while providing desirable flexibility in connection
with possible acquisitions and other corporate purposes, could have the effect
of making it more difficult for a third party to acquire, or discouraging a
third party from acquiring, a majority of the outstanding voting stock of
Chemex. See "Description of Capital Stock."
 
     Competition.  The domestic and international markets for the pharmaceutical
industry are highly competitive. Many of ACCESS' and Chemex's competitors have
significantly greater financial, technical, research and development and
marketing resources than ACCESS and Chemex combined. Chemex's ability to
compete, whether or not the Merger is consummated, depends primarily upon
scientific and technical superiority, patent protection, timely regulatory
approvals and effective pricing and marketing. Chemex's future success will also
depend upon, among other factors, its ability to develop, introduce, manufacture
and obtain regulatory approvals on a timely basis for new products or enhanced
versions of existing products or for the use of existing products in new
applications. Other substances or technologies currently existing or developed
in the future may be the basis for competitive products that will render
Chemex's technology obsolete or non-competitive. There can be no assurance that
any potential products or processes will compete successfully. Additionally,
there can be no assurance that ACCESS' and Chemex's competitors will not
substantially increase the resources devoted to the development and marketing of
products competitive with those of ACCESS. See "Business of
ACCESS -- Competition" and "Business of Chemex."
 
     Dependence Upon Skilled Personnel.  The business of ACCESS depends, and the
business of Chemex following the consummation of the Merger is expected to
depend, heavily upon the active participation of Dr. David Ranney and Kerry P.
Gray. Loss of the services of either of these individuals would adversely affect
the operation of ACCESS' business. In addition, both the long and short term
success of ACCESS depend in large part upon its continued ability to attract and
retain skilled scientific, and managerial employees, which may prove difficult
because the market for the services of such individuals is highly competitive.
 
     Absence of Dividends.  Neither Chemex nor ACCESS has paid cash dividends on
its Common Stock, and Chemex, as the surviving corporation of the Merger, does
not anticipate paying cash dividends on Chemex Common Stock in the foreseeable
future. See "Comparative Share Prices and Dividends of Chemex Common Stock and
ACCESS Common Stock."
 
                                       12
<PAGE>   24
 
                                  INTRODUCTION
 
     This Proxy Statement/Prospectus is furnished to the Chemex Stockholders in
connection with the solicitation of proxies by the Board of Directors of Chemex
for use at the Special Meeting. The Special Meeting will be held on the date, at
the time and in the location, and will consider the matters, set forth under
"The Special Meeting." A form of proxy is being provided to the Chemex
Stockholders with this Proxy Statement/Prospectus. The approximate date on which
this Proxy Statement, the accompanying Notice of Special Meeting of Stockholders
and the accompanying Proxy is first being mailed to Chemex Stockholders is
          , 1995. Information with respect to the execution and revocation of
proxies is provided under "The Special Meeting -- Voting Rights."
 
     The costs of solicitation of Chemex Stockholder proxies will be borne by
Chemex. Chemex will reimburse the brokers, fiduciaries, custodians and other
nominees for reasonable out-of-pocket expenses incurred in sending this Proxy
Statement/Prospectus and other proxy materials to, and obtaining instructions
relating to such materials from, the beneficial holders of Chemex Common Stock.
 
     Chemex has retained DF King and Arenal & Company to assist it in the
solicitation of proxies at an estimated cost of $7,500, and $3,000,
respectively, plus reimbursement of such companies' accountable expenses. Chemex
Stockholder proxies will be solicited by employees of DF King and Arenal &
Company and also may be solicited by directors or executive officers of Chemex,
in person, by letter or by telephone, telecopy or telegram.
 
                              THE SPECIAL MEETING
 
PURPOSE OF THE MEETING
 
   
     At the Special Meeting, the Chemex Stockholders will be asked to consider
and vote upon (i) the approval and adoption of the Merger Agreement, pursuant to
which, among other matters, ACCESS will be merged with and into Chemex, with
Chemex the surviving corporation and each share of the ACCESS Common Stock will
be converted into 3.7744 shares of Chemex Common Stock (subject to adjustment as
provided in the Merger Agreement); (ii) the approval of an amendment to the
Certificate of Incorporation of Chemex increasing the number of authorized
shares of Chemex Common Stock to 40,000,000 and the number of authorized shares
of Chemex Preferred Stock to 10,000,000; (iii) the approval of an amendment to
the Certificate of Incorporation of Chemex to effect a change of the name of
Chemex to "ACCESS Pharmaceuticals, Inc."; (iv) the approval of the establishment
of the Chemex 1995 Stock Option Plan (the "Plan"), whereby an aggregate of
2,000,000 shares of Chemex Common Stock will be issuable pursuant to the terms
of such plan; (v) to ratify the selection of KPMG Peat Marwick LLP by the Board
of Directors of Chemex as Chemex's independent auditors; (vi) the election of
three directors; and (vii) the approval of an adjournment of the Special
Meeting, if necessary, to permit further solicitation of proxies in the event
that there are not sufficient votes at the Special Meeting to consider and
approve any or all of the above proposals.
    
 
     The Board of Directors of Chemex without dissent has approved the Merger
Agreement and the transactions contemplated thereby and recommends that the
Chemex Stockholders vote "FOR" the proposal to approve and adopt the Merger
Agreement and the transactions contemplated thereby.
 
   
     The Board of Directors of Chemex without dissent has also approved the 1995
Option Plan and the proposed amendments to the Certificate of Incorporation of
Chemex, has selected KPMG Peat Marwick LLP as Chemex's independent auditors and
has designated the nominees for election as directors. The Board of Directors of
Chemex recommends that the Chemex Stockholders vote "FOR" the proposal to
approve the 1995 Option Plan, "FOR" the proposals to amend the Certificate of
Incorporation of Chemex, "FOR" ratification of its selection of independent
auditors and "FOR" the election of each of the nominees for director. See "The
Proposed Merger -- Recommendations of the Board of Directors and Reasons for the
Merger," "Proposal to Approve the 1995 Stock Option Plan," "Proposals to Amend
the Certificate of Incorporation of Chemex," "Ratification of Selection of
Independent Auditors" and "Election of Directors."
    
 
                                       13
<PAGE>   25
 
     It is expected that representatives of KPMG Peat Marwick LLP will be
present at the Special Meeting and will be available to respond to questions.
Representatives of KPMG Peat Marwick LLP will be given an opportunity to make a
statement at the Special Meeting if they so desire.
 
DATE, TIME AND PLACE; RECORD DATE
 
   
     The Special Meeting is scheduled to be held at 10:00 A.M., local time, on
January 23, 1996, at           . The Board of Directors of Chemex has fixed the
Record Date at the close of business on December 15, 1995 for the determination
of Chemex Stockholders entitled to notice of and to vote at the Special Meeting.
Only holders of record of Chemex Common Stock as of the close of business on the
Record Date will be entitled to notice of and to vote at the Special Meeting.
    
 
VOTING RIGHTS
 
   
     The affirmative vote of the majority of shares of Chemex Common Stock
present, either in person or represented by proxy, at the Special Meeting is
required to approve each of the matters presented for stockholder approval with
the exception of the proposals to approve and adopt the Merger Agreement and the
transactions contemplated thereby and to amend the Certificate of Incorporation
of Chemex. Pursuant to the Delaware General Corporation Law, the affirmative
vote of the holders of at least a majority of the shares of Chemex Common Stock
outstanding as of the Record Date is required to approve the proposals to
approve and adopt the Merger Agreement and to amend the Certificate of
Incorporation of Chemex. At the Record Date, there were 8,737,788 shares of
Chemex Common Stock outstanding. Holders of record of Chemex Common Stock
outstanding as of the Record Date are entitled to one vote per share at the
Special Meeting. The presence, either in person or represented by proxy, of the
holders of a majority of the shares of Chemex Common Stock outstanding as of the
Record Date is necessary to constitute a quorum at the Special Meeting. As of
the Record Date, Chemex's directors, executive officers and their respective
affiliates as a group beneficially held shares representing approximately 14.4%
of the votes entitled to be cast by Chemex Stockholders at the Special Meeting.
    
 
     Chemex Stockholders have the right to vote cumulatively for the election of
directors. This means that in the voting at the Special Meeting each Chemex
Stockholder, or his proxy, may multiply the number of his shares by three (the
number of directors to be elected) and then cast the resulting total number of
votes for a single nominee, or distribute such votes on the ballot among the
nominees as desired. The proxies submitted to the Board of Directors in response
to this solicitation may, in the discretion of the proxy holder, cumulate the
votes of the shares they represent. However, the Board of Directors requires
that any Chemex Stockholder otherwise electing to exercise his cumulative voting
rights, if voting in person, to so indicate prior to the beginning of the
Special Meeting or, if voting by proxy given to someone other than those
designated by the Board of Directors in this solicitation, to so indicate on
said proxy.
 
     The Chemex Board of Directors is soliciting proxies so that each Chemex
Stockholder on the Record Date has the opportunity to vote on the proposals to
be considered at the Special Meeting. When a proxy card is returned properly
signed and dated, the shares represented thereby will be voted in accordance
with the instructions on the proxy card. If a Chemex Stockholder does not return
a signed proxy card, his or her shares will not be voted, unless such
stockholder attends and votes at the Special Meeting, and thus will have the
effect of a vote against the proposals to approve the amendments to the
Certificate of Incorporation of Chemex and to approve and adopt the Merger
Agreement.
 
     A broker who holds shares in street name will not be entitled to vote on
the Merger, the 1995 Stock Option Plan, the amendments to the Certificate of
Incorporation of Chemex, the ratification of Chemex's independent auditors and
the election of directors without instructions from the beneficial owner. This
inability to vote is referred to as a broker nonvote. Abstentions and broker
nonvotes will be counted for purposes of determining the existence of a quorum
at the Special Meeting. However, since the proposals for the approval and
adoption of the Merger Agreement and for amendments of the Certificate of
Incorporation of Chemex to be considered at the Special Meeting require the
affirmative vote of at least a majority of the shares of Chemex Common Stock
outstanding as of the Record Date, abstentions and broker nonvotes will
 
                                       14
<PAGE>   26
 
have the effect of a negative vote with respect to such proposals, but not as to
the other proposals to be considered at the Special Meeting. Chemex Stockholders
are urged to mark the boxes on the proxy card to indicate how their shares will
be voted. If a Chemex Stockholder (other than a broker which holds shares in
street name for its customers) returns a signed proxy card, but does not
indicate how his or her shares are to be voted, the shares represented by the
proxy card will be voted "FOR" the proposal to approve and adopt the Merger
Agreement and the transactions contemplated thereby, "FOR" the proposals to
approve the 1995 Option Plan and the amendments to the Certificate of
Incorporation of Chemex, "FOR" the election of each of the nominees for director
and "FOR" ratification of the Chemex Board's selection of Chemex's independent
auditors.
 
     The proxy card also confers discretionary authority on the individuals
appointed by the Board of Directors of Chemex and named on the proxy card to
vote the shares represented thereby on any other matter incidental to the
Special Meeting that is properly presented for action at the Special Meeting or
any adjournment or postponement thereof.
 
     Any Chemex Stockholder who executes and returns a proxy card may revoke
such proxy at any time before it is voted by (i) notifying in writing the
Secretary of Chemex, at 660 White Plains Road, Suite 400, Tarrytown, New York
10591, (ii) granting a subsequent proxy or (iii) appearing in person and voting
at the Special Meeting. Attendance at the Special Meeting will not in and of
itself constitute revocation of a proxy.
 
STATE OF INCORPORATION AND PRINCIPAL PLACE OF BUSINESS
 
     Chemex was founded in 1974 as Chemex Corporation, a Wyoming corporation,
and in 1983 changed its name to Chemex Pharmaceuticals, Inc. Chemex changed its
state of incorporation from Wyoming to Delaware on June 30, 1989. Upon
consummation of the Merger, Chemex's name will be changed to ACCESS
Pharmaceuticals, Inc. and its operations and principal office will be moved to
ACCESS' facilities in Dallas, Texas and Delaware will remain as the state of
incorporation.
 
APPRAISAL RIGHTS
 
     If the Merger is consummated, stockholders of ACCESS who comply with and
perfect their statutory appraisal rights under Article 5.11 et seq. of the Texas
Business Corporation Act will be entitled to have the "fair value" of their
shares of ACCESS stock at the effective time (exclusive of any element of value
arising from the accomplishment or expectation of the Merger) judicially
determined and paid to them. See Exhibit C attached hereto. Holders of the
Chemex Common Stock are not entitled to appraisal or dissenters' rights under
Delaware General Corporation Law in connection with any of the proposals since,
as of the Record Date, there were more than 2,000 record holders of Chemex
Common Stock. See Exhibit D attached hereto.
 
                                       15
<PAGE>   27
 
                              THE PROPOSED MERGER
 
GENERAL
 
     The following is a brief summary of certain aspects of the Merger. This
summary does not purport to be complete and is qualified in its entirety by
reference to the Merger Agreement, which is attached to this Proxy
Statement/Prospectus as Exhibit A.
 
     At the Effective Time, ACCESS will be merged with and into Chemex, and
ACCESS will cease to exist as a corporation. Chemex will be the surviving
corporation in the Merger.
 
     At the Effective Time, each then outstanding share of ACCESS Common Stock
will be converted into the right to receive, and become exchangeable for, 3.7744
shares of Chemex Common Stock (subject to adjustment to the Conversion Number as
a result of implementation of the Net Cash Adjustment and as otherwise provided
in the Merger Agreement). No fractional shares of Chemex Common Stock will be
issued in the Merger, and ACCESS Stockholders whose shares are converted in the
Merger will be entitled to a cash payment in lieu of such fractional shares. See
"No Fractional Shares."
 
     As a consequence of the Merger, warrants to purchase up to 48,036 shares of
ACCESS Common Stock at an exercise price of $2.00 per share will be converted at
the Effective Time into warrants to purchase up to 181,307 shares of Chemex
Common Stock (subject to adjustment as a result of implementation of the Net
Cash Adjustment and as otherwise provided in the Merger Agreement) at an
exercise price of $0.53 per share (subject to adjustments as a result of the Net
Cash Adjustment and as otherwise provided in the Merger Agreement).
 
     None of the shares of Chemex Common Stock issued and outstanding
immediately prior to the Effective Time will be converted or otherwise modified
in the Merger. All of such shares will continue to be outstanding capital stock
of Chemex after the Merger.
 
     A description of the relative rights, privileges and preferences of Chemex
Common Stock, including certain non-significant differences between Chemex
Common Stock and ACCESS Common Stock, is set forth under "Chemex Capital Stock"
and "Comparison of Rights of Holders of ACCESS Common Stock and Chemex Common
Stock."
 
CLOSING; EFFECTIVE TIME
 
     The closing of the transactions contemplated by the Merger Agreement (the
"Closing") will take place within five business days following the date on which
the last of the conditions set forth in the Merger Agreement is satisfied or
waived, or at such other time as Chemex and ACCESS may agree (the "Closing
Date"). The Merger will become effective on the later of the date the
Certificate of Merger required under Delaware General Corporation Law is
accepted for filing by the Secretary of State of the State of Delaware and the
Articles of Merger required under the Texas Business Corporation Act is accepted
for filing by the Secretary of State of the State of Texas. Such filings will be
made simultaneously with, or as soon as practicable after, the Closing.
 
EXCHANGE OF STOCK CERTIFICATES
 
     From and after the Effective Time, ACCESS Stockholders immediately prior to
the Effective Time will be entitled to receive 3.7744 shares of Chemex Common
Stock (subject to possible adjustments to such conversion number (the
"Conversion Number") as a result of implementation of the Net Cash Adjustment
and otherwise as provided in the Merger Agreement) in exchange for each share of
ACCESS Common Stock held immediately prior to the Effective Time. See "General."
Notwithstanding the Conversion Number, no fractional shares of Chemex Common
Stock will be issued. See "No Fractional Shares." As soon as practicable after
the Effective Time, the Exchange Agent will mail transmittal instructions and a
form of letter of transmittal to each person who was an ACCESS Stockholder
immediately prior to the Effective Time. The transmittal instructions will
describe the procedures for surrendering the ACCESS stock certificates that
prior to the Merger represented ACCESS Common Stock in exchange for Chemex stock
certificates representing
 
                                       16
<PAGE>   28
 
Chemex Common Stock. The form of letter of transmittal will specify that
delivery shall be effected, and the risk of loss and title to the Chemex stock
certificates shall pass, only upon actual delivery of the ACCESS stock
certificates to the Exchange Agent. Upon surrender of the ACCESS stock
certificates for cancellation to the Exchange Agent, together with a duly
executed letter of transmittal and such other documents as the Exchange Agent
may reasonably require, such ACCESS Certificates will be canceled and the holder
of such ACCESS stock certificates will receive a Chemex stock certificate
representing that number of whole shares of Chemex Common Stock to which the
former ACCESS stockholder is entitled pursuant to the provisions of the Merger
Agreement, in addition to payment in cash for any fractional share of ACCESS
Common Stock. ACCESS STOCKHOLDERS SHOULD NOT SUBMIT THEIR ACCESS STOCK
CERTIFICATES FOR EXCHANGE UNLESS AND UNTIL THEY HAVE RECEIVED THE TRANSMITTAL
INSTRUCTIONS AND A FORM OF LETTER OF TRANSMITTAL FROM THE EXCHANGE AGENT.
 
     ACCESS Stockholders will not be entitled to receive any dividends or other
distributions on Chemex Common Stock until the Merger has been consummated and
they have exchanged their ACCESS stock certificates for Chemex stock
certificates. Subject to applicable laws, any such dividends and distributions
after the Effective Time will be accumulated and, at the time a former ACCESS
Stockholder surrenders his or her ACCESS stock certificates to the Exchange
Agent, all such accrued and unpaid dividends and distributions, together with
any cash payments in lieu of fractional shares of Chemex Common Stock, will be
paid without interest. It is not anticipated that any accrued and unpaid
dividends or distributions would exist at the Effective Time. See "Comparative
Per Share Prices and Dividends of Chemex Common Stock and ACCESS Common Stock."
 
     If any Chemex stock certificate is to be issued in a name other than that
in which the corresponding ACCESS stock certificate is registered, it is a
condition to the exchange of the ACCESS stock certificate that the former ACCESS
Stockholder requesting such exchange comply with applicable transfer
requirements and pay any applicable transfer or other taxes, or establish to the
satisfaction of Chemex that such tax has been paid or is not applicable. No
transfers of ACCESS Common Stock will be made on the stock transfer books of
ACCESS after the close of business on the day prior to the Effective Time.
 
     Neither the Exchange Agent nor any party to the Merger Agreement will be
liable to any former ACCESS Stockholder for any shares of Chemex Common Stock
delivered to state authorities pursuant to applicable abandoned property,
escheat or other similar laws. At any time following 180 days after the
Effective Time, Chemex may require the Exchange Agent to return all Chemex
Common Stock and cash deposited with the Exchange Agent which has not been
disbursed to former ACCESS Stockholders and thereafter any such holders which
have not remitted their ACCESS stock certificates to the Exchange Agent may look
to Chemex only as a general creditor with respect thereto.
 
NO FRACTIONAL SHARES
 
     No certificates or scrip for fractional shares of Chemex Common Stock will
be issued upon the surrender for exchange of ACCESS stock certificates in the
Merger. No dividend, stock split or interest will be paid with respect to any
fractional share of Chemex Common Stock, and such fractional interests will not
entitle the owner thereof to vote or to any of the other rights of a Chemex
Stockholder. Instead, each ACCESS Stockholder who would otherwise have been
entitled to a fraction of a share of Chemex Common Stock upon surrender of
ACCESS stock certificates for exchange will be entitled to receive from the
Exchange Agent a cash payment (without interest) at a pro rata price based on
the valuation value of Chemex Common Stock at $0.75 per share.
 
BACKGROUND OF THE MERGER
 
     During 1994 it became apparent to Chemex that to succeed in the changing
biotechnology and developing pharmaceutical environment and to maximize
stockholder value, Chemex had to form a strategic alliance by way of a joint
venture or merger. Potential partners were identified, initially in the field of
dermatology, and discussions commenced with potential partners in the later part
of 1994. As a result of such discussions, it became apparent to Chemex that the
possibility of forming a strategic alliance in the field of
 
                                       17
<PAGE>   29
 
dermatology which would be advantageous to the Chemex stockholders was
questionable. Consequently, the search for a merger or joint venture partner was
expanded to include entities whose technologies had the potential to give Chemex
stockholders significant "upside" potential.
 
     On July 10, 1995 the possibility of a merger was first discussed with
ACCESS. The Chemex Board of Directors was made aware of this opportunity on July
11, 1995 and gave management approval to commence discussions and analysis of
the business combination. Scientific due diligence was conducted by Atul
Khandwala, then the Executive Vice President of Chemex, and other
representatives of Chemex on July 15, 1995 at ACCESS' principal offices. Based
upon the scientific due diligence of the ACCESS technology it was determined
that discussions of terms regarding a potential merger should proceed. On July
21, 1995 Herbert McDade, Leonard Stigliano, the then Principal Financial Officer
of Chemex, and Kerry Gray, the President and CEO of ACCESS, met at the Chemex
headquarters to negotiate possible merger terms. See "Conflicts of Interest."
 
     On July 26, 1995 a draft outline of terms and conditions that would form
the basis of the Merger Agreement were forwarded to ACCESS. ACCESS responded to
this draft on July 27, 1995 and presented this potential opportunity to its
Board of Directors on July 31, 1995 and was given approval to continue
discussions.
 
     Concurrent with these discussions both Chemex and ACCESS were investigating
alternative business strategies and Chemex was involved with the sale of
Amlexanox to Block. Negotiations were not advanced significantly during August
while each of ACCESS and Chemex evaluated its alternatives.
 
     As of July 31, 1995 Chemex's research and development operations ceased and
Chemex's operating expenses were reduced significantly. All research and
development operations of Chemex have been suspended pending the Merger and will
be reviewed after the proposal is approved to determine which projects, if any,
will be continued after the consummation of the Merger.
 
     On September 11, 1995 ACCESS forwarded to Chemex the draft Merger
Agreement. Chemex responded to this draft Merger Agreement on September 18,
1995. Concurrent with the negotiations with ACCESS, Chemex was negotiating the
Stockholder's Agreement with the majority shareholder of ACCESS, Dr. David
Ranney, to gain concessions required by the Chemex Board of Directors. See
"Stockholders Agreement" and "Certain Relationships and Related
Transactions -- ACCESS."
 
     The Board of Directors of Chemex approved the transaction at a Board of
Directors meeting conducted on September 14, 1995, subject to certain revisions
in the terms and receipt of a fairness opinion that the Merger from a financial
point of view was fair to the Chemex Stockholders. Final negotiations were
concluded with both ACCESS and Dr. David Ranney (regarding the Stockholder's
Agreement) on October 2, 1995.
 
     On September 15, 1995 Chemex engaged Advisory Capital Partners, an
investment banking firm, to render the fairness opinion. This opinion was
received on October 3, 1995. See "Opinion of Financial Advisor."
 
CONFLICTS OF INTEREST
 
     Upon the effectiveness of the Merger, Herbert H. McDade, Jr., presently
Chairman of the Board, Chief Executive Officer, President and Treasurer of
Chemex, will become a director and Chairman of the Board of Chemex as the
surviving corporation of the Merger. See "Management" for additional information
about Mr. McDade. As of September 30, 1995, Mr. McDade was the owner of 115,000
shares of ACCESS Common Stock and therefore will become the beneficial owner of,
at the Effective Time, 434,056 shares of Chemex Common Stock as a result of the
exchange of such shares of ACCESS Common Stock pursuant to the terms of the
Merger Agreement in addition to the 289,157 shares of Chemex Common Stock
beneficially owned by Mr. McDade as of September 30, 1995. Mr. McDade was a
director of ACCESS from January 1989 to July 31, 1995. In addition, in
consideration for the termination of his employment with Chemex and for an
agreement by Mr. McDade to forfeit severance pay equal to approximately two
years of his base salary which he would be otherwise entitled to receive on a
change in control of Chemex pursuant to his employment agreement with Chemex,
conditioned upon the consummation of the Merger, Mr. McDade and Chemex have
entered into an agreement on October 4, 1995, pursuant to which, among other
things, (i) Mr. McDade will
 
                                       18
<PAGE>   30
 
become a consultant to Chemex, providing consulting services to Chemex at least
four days each month and will be paid a base of $1,500 per day of consulting;
(ii) Chemex will use its best efforts to retain Mr. McDade's enrollment under
its healthcare plan; and (iii) the period for exercise for all options and SARs
owned by Mr. McDade will be extended from three months after the termination of
his employment with Chemex to the expiration of the option or SAR. See "Security
Ownership of Certain Beneficial Owners and Management" for both Chemex and
ACCESS and "Certain Relationships and Related Transactions -- Chemex."
 
     Charles Smith, a director of Chemex, is the beneficial owner as of
September 30, 1995 of 25,000 shares of ACCESS Common Stock and therefore will
become the beneficial owner of an additional 94,360 shares of Chemex Common
Stock at the Effective Time. See "Security Ownership of Certain Beneficial
Owners and Management -- Chemex" and "Access."
 
REASONS FOR THE MERGER
 
  Chemex
 
     Chemex has been unsuccessful in its attempt to raise additional equity
financing over the past three years which reflects the general difficulty of
biotechnology and pharmaceutical research and development companies to obtain
such financing. With the objective of maximizing value for its stockholders,
Chemex has actively pursued a strategy of investigating merger or joint venture
possibilities with entities that either have adequate financial resources to
continue the research and development of Chemex's dermatology drugs or have
significant technology that would give the Chemex stockholders some "upside"
possibility in terms of share value.
 
     As the competition for equity funding became fierce during the 1993-94
period due to the contraction of both public and private investing, the
possibility to fund a dermatology company was made even more difficult. Chemex's
position in this regard was further exacerbated by the fact that the potential
revenues from product developments would accrue to the joint venture with Block,
and Chemex would receive only a portion of the revenues. See "Business of
Chemex."
 
     The joint venture with Block also proved to be a hindrance in entering a
new technology relationship with a third party because, pursuant to the joint
venture, essentially half of the assets of Chemex (the dermatology drug
portfolio) were encumbered by another party. Further, as a result of Chemex's
limited cash resources, Chemex was unable to continue funding research projects
under the joint venture. These factors were the primary reasons Chemex sought
the dissolution of the joint venture, sold to Block Chemex's share of its rights
to Amlexanox and actively pursued merging Chemex with another entity.
 
  Alternatives to the Merger
 
     As previously stated, Chemex has undertaken to identify and evaluate
potential merger and joint venture arrangements.
 
     Commencing at the beginning of the second half of 1994 Chemex engaged in
discussions with a biotechnology company whose technology has dermatology
applications. Chemex management pursued this opportunity aggressively as the
technology was exciting and such company was well-funded. Originally, it was
planned that a possible transaction could be concluded in January 1995. However,
due to internal strategic direction discussions of the potential partner the
transaction was delayed past the point where the decision to exercise the option
on the sale of Amlexanox to Block had to be made by Chemex. Despite this,
negotiations continued into August 1995 at which time it became apparent that if
a transaction was possible it would be under less favorable terms and would be
in a different form than was previously envisaged.
 
     Despite the optimism of Chemex management regarding the likelihood of
concluding the above outlined transaction Chemex continued to pursue other
opportunities which resulted in advanced discussions with three other potential
partners.
 
                                       19
<PAGE>   31
 
     Chemex explored an opportunity to acquire a product in atopic dermatitis
being developed by a major pharmaceutical company that was not interested in
further advancing the dermatology applications of the compound. An investment
group was negotiating for the rights to this product, which it would have
licensed to Chemex along with providing funding to Chemex to advance the drug
development in exchange for equity in Chemex. The terms proposed and the royalty
payable to the major pharmaceutical company made this opportunity marginally
attractive. Ultimately, another company pre-empted this opportunity by
outbidding the investment group for the rights to the product.
 
     At the same time, negotiations were ongoing with two biotechnology
companies engaged in similar endeavors whereby the two companies would have
merged with Chemex. Initially this merger was considered to be an outstanding
opportunity to acquire technology which would have applications in large market
segments. However, the relative valuation of the two target companies resulted
in one of the two companies declining to proceed with merger or joint venture
discussions.
 
     Discussions continued with the other company and scientific due diligence
was conducted. Terms of a potential merger were negotiated which initially were
acceptable. However, findings during Chemex's financial due diligence of this
company made this opportunity less attractive for Chemex and Chemex management
decided to discontinue discussions.
 
     It was during this period of negotiations that the ACCESS opportunity was
first discussed. Chemex's management's belief in the breadth of the ACCESS
technology, the lower risk of technology failure, significant market potential
for products that could be developed off the ACCESS technology, the projected
burn rate to develop the ACCESS technology and the more favorable terms for the
Chemex stockholders influenced Chemex management to recommend to the Board of
Directors of Chemex approval of this transaction.
 
     If the Merger is not approved at the Special Meeting or is not consummated
for any other reason, Chemex will have a limited number of alternatives. Chemex
does not have the capital resources necessary to continue its business
activities. Additionally, due to the lack of funds, Chemex has only one
management employee and furthermore has no research employees, and therefore
does not possess the managerial or technical skills necessary to continue
Chemex's research and development activities. If the Merger is not consummated,
Chemex could attempt to raise additional capital through public or private
offerings of common stock, preferred stock or debt. However, based upon Chemex's
past failures to obtain financing to continue its business, Chemex's ability to
raise new capital in its current situation is believed by Chemex's management to
be unlikely.
 
     Chemex could continue its efforts to locate a merger or joint venture
partner of Chemex's business. Chemex, however, currently has no reason to
believe that such a search would be any more successful than its last efforts.
 
     Chemex's final alternative would be liquidation. In a liquidation, Chemex's
assets likely would be sold on an individual basis. Any royalty payments from
Block in connection with sales of Amlexanox likely would be paid to Chemex
stockholders over the life of the patent as a liquidating dividend. The present
value of this dividend stream is projected to be significantly less than what
could be realized by the Merger.
 
  ACCESS
 
     With the exception of the seed financings, which was provided principally
by the founder, Dr. David Ranney, and his family members, ACCESS has been funded
by corporate agreements. In 1993, coincidental with the significant downturn in
biotechnology investing, ACCESS commenced venture capital fund raising
activities in conjunction with a regional investment banking group. These
activities were unsuccessful and in the second half of 1994 ACCESS commenced
direct contact with potential investors. In the first half of 1995, ACCESS has
received indications of interest from several potential investors, however,
based on the time estimated to conclude such arrangements and the
discontinuation of research and support payments, ACCESS commenced the
evaluation of alternate financing activities, which would provide immediate cash
and potentially longer term royalty streams. At the time these activities
commenced, ACCESS was presented
 
                                       20
<PAGE>   32
 
with two alternatives, one which could have led to the outright purchase of
ACCESS by a major company and the Chemex alternative. The Board of Directors of
ACCESS concluded that the Chemex alternative as the preferable alternative to
maximize shareholder value.
 
   
DISCUSSION OF ADVANTAGES AND DISADVANTAGES OF THE MERGER
    
 
   
     Set forth below is a discussion of some of the advantages and disadvantages
to Chemex and the Chemex Stockholders of the Merger. Chemex Stockholders should
carefully consider such advantages and disadvantages in making their decision
regarding the Merger.
    
 
   
  Advantages
    
 
   
     The Chemex Board of Directors found that the advantages of the Merger are
that it provides Chemex with new technology, additional experienced
pharmaceutical management, and a broader product range which may compete in
large markets. The Merger will provide the Chemex Stockholders with an
opportunity to participate in the upside potential of the products under
development by ACCESS and otherwise in the combined company following the
Effective Time, including through the addition of the managerial and technical
resources of ACCESS. (See "Business of ACCESS" and "Management -- ACCESS.") As
of July 31, 1995, all of Chemex's research and development operations ceased. In
addition, Chemex does not anymore have the capital, management or technical
resources necessary to continue its business or research and development
activities or develop any products. (See "Reasons for the Merger.")
    
 
   
  Disadvantages
    
 
   
     The Chemex Board of Directors recognized that a disadvantage of the Merger
is that it causes substantial dilution of the existing stockholders's interest.
In addition, Dr. David Ranney currently beneficially owns approximately 64.8% of
the issued and outstanding ACCESS Common Stock and will thus beneficially own,
immediately after the Effective Time, approximately 40% of the issued and
outstanding Chemex Common Stock. As a result, Dr. David Ranney will, subject to
the terms of the Stockholder's Agreement which provides that so long as he
beneficially owns fifteen percent or more of the capital stock of Chemex, Dr.
David Ranney will, subject to certain conditions and exceptions, vote all of his
shares of the capital stock of Chemex as recommended by the Board of Directors
of Chemex for any proposal presented to the Chemex Stockholders for approval,
effectively have the ability to determine all matters requiring approval by
stockholders, including the election of Directors, and therefore to control the
Company and direct its affairs and business and control the disposition of the
Company. (See "Risk Factors -- Concentration of Ownership," "Principal
Stockholders" (Chemex and ACCESS), "Management" (Chemex and ACCESS). "Certain
Relationships and Related Transactions -- Chemex" and "The Proposed
Merger -- Stockholder's Agreement.")
    
 
   
     Also, consummating the Merger will at least temporarily foreclose any other
alternatives available to Chemex. However, if the Merger is not approved at the
Special Meeting or is not consummated for any other reason, Chemex will have a
limited number of alternatives.
    
 
   
     As discussed above, Chemex does not have anymore the capital, management or
technical resources necessary to continue its business activities. If the Merger
is not consummated, Chemex could attempt to raise additional capital through
public or private offerings of common stock, preferred stock or debt. However,
based upon Chemex's past failures to obtain financing to continue its business,
Chemex's ability to raise new capital in its current situation is believed by
Chemex's management to be unlikely.
    
 
   
     Chemex could continue its efforts to locate a merger or joint venture
partner. However, Chemex currently has no reason to believe that such a search
would be any more successful than its last efforts. Furthermore, Chemex's Board
of Directors concluded that Chemex would be unlikely to locate a technology or
merger partner that would offer terms and conditions as favorable as those
reflected in the Merger Agreement.
    
 
   
     Chemex's final alternative would be liquidation. However, in a liquidation,
Chemex's assets would be sold on an individual basis. Any royalty payments from
Block in connecting with sales of Amlexanox likely would
    
 
                                       21
<PAGE>   33
 
   
be paid to Chemex Stockholders over the life of the patent as a liquidating
dividend. The present value of this dividend stream is projected to be
significantly less than what could be realized in the Merger. (See "Alternatives
to the Merger.")
    
 
   
     The operations of the combined company following the Effective Time are
subject to certain risks. See "Risk Factors."
    
 
CONDUCT OF CHEMEX'S BUSINESS AFTER CONSUMMATION OF THE MERGER
 
     One of the objectives of the Merger is to form a larger and stronger
pharmaceutical development company with a broader base of technology and
potential products and opportunity. Management expects to proceed as soon as
possible to fully integrate all the functions of the merged companies. Following
the Effective Time of the Merger, Chemex will relocate to ACCESS' facility in
Dallas, Texas.
 
     Herbert H. McDade, Jr., Chairman of the Board, Chief Executive Officer,
President and Treasurer of Chemex, has indicated that he will resign from all of
such positions upon consummation of the Merger. In addition, four current
members of the Board of Directors will resign as directors of Chemex (Vernon
Taylor III, Charles Smith, Sandford Smith and Paul Woolard). Three directors
will remain from Chemex as Directors of the new company (Elizabeth M. Greetham,
J. Michael Flinn and Herbert H. McDade, Jr.), ACCESS will appoint three
directors and one new director will be appointed jointly by the representatives
of Chemex and ACCESS on the Board of Directors of the Surviving Corporation for
a total of seven members. Pursuant to the Stockholder's Agreement, the Board of
Directors of Chemex, following consummation of the Merger, is required to
nominate, in any election of directors of Chemex, Dr. David Ranney or his
nominee for election as director so long as Dr. Ranney beneficially owns at
least 10% of the issued and outstanding Chemex Common Stock. See "Stockholder's
Agreement" and "Certain Relationships and Related Transactions -- Chemex." If
the Merger is not consummated for any reason, the current directors of Chemex
and the directors elected at the Special Meeting will continue as the directors
of Chemex, subject to the requirements of the Delaware General Corporation Law,
the Chemex Certificate of Incorporation and the Chemex Bylaws. See "Election of
Directors."
 
     Upon consummation of the Merger, Chemex's Board of Directors intends to
elect as the new management of Chemex: Kerry P. Gray as President and Chief
Executive Officer, Dr. David Ranney as Executive Vice President, and Stephen B.
Thompson as Chief Financial Officer. See "Effects of the Merger" and "Management
of ACCESS." For information regarding historical compensation paid to Messrs.
Gray, Ranney, and Thompson, see "Executive Compensation -- ACCESS." If the
Merger is not consummated for any reason, the officers of Chemex as set forth in
"Management of Chemex" are expected to continue as the officers of Chemex.
 
     Chemex also expects to identify and evaluate new product opportunities in
the pharmaceutical field. These opportunities may come from a number of
potential sources, including other pharmaceutical companies and inventors.
Management believes that there are and will continue to be significant product
opportunities for Chemex from companies which are either unwilling or unable to
develop these opportunities for financial or other reasons.
 
     The Merger will not provide funding adequate for research and development
of the ACCESS technology portfolio. As a result, Chemex expects to seek
additional funding in the near term. The form and timing of this additional
funding will depend upon market conditions and the achievement of regulatory and
other milestones by Chemex. No assurance can be given that any additional
funding on terms acceptable to Chemex will be achieved.
 
RECOMMENDATION OF THE BOARD
 
   
     At a meeting held on September 14, 1995, the Board of Directors of Chemex
unanimously approved the Merger Agreement and the transactions contemplated
thereby. In reaching its determination, the Board of Directors of Chemex
consulted with its counsel and its management, and considered the following
material factors: the current status and respective operations and financial
prospects of Chemex and ACCESS,
    
 
                                       22
<PAGE>   34
 
   
Chemex's capital requirements and the alternatives available to Chemex. The
Chemex Board of Directors expressly conditioned its approval of the Merger
Agreement upon the receipt of an opinion from Chemex's financial advisor that
the Merger was fair, from a financial point of view to the Chemex Stockholders.
The Chemex Board of Directors recognized that a disadvantage of the Merger is
that it causes substantial dilution of the existing stockholders' interests.
Nevertheless, substantial time and effort were expended over a two-year period
to explore the possible alternative funding opportunities and no other
satisfactory arrangements were found. The Chemex Board of Directors found that
the advantages of the Merger are that it provides Chemex with new technology,
additional experienced pharmaceutical management, and a broader product range
which may compete in large markets. In addition, the Board of Directors in
considering the alternatives available to Chemex determined that (i) Chemex
lacked the capital, managerial and technical resources anymore necessary to
continue its business, conduct its research and development activities and
develop products and that the further acquisition of capital on terms favorable
to Chemex and the Chemex Stockholders was unlikely, (ii) Chemex's ability to
merge with another technology company with similar upside potential to that of
ACCESS was unlikely, and (iii) liquidation of Chemex would be a less desirable
alternative since, in a liquidation, Chemex's assets would be sold on an
individual basis and any royalty payments from Block in connection with sales of
Amlexanox likely would be paid to Chemex Stockholders over the life of the
patent as a liquidating dividend with the present value of this dividend stream
projected to be significantly less than what could be realized in the Merger.
(See "Discussion of Advantages and Disadvantages of the Merger.") Accordingly,
the Board of Directors of Chemex recommends that the Chemex Stockholders vote
"FOR" the approval and adoption of the Merger Agreement and the transactions
contemplated thereby. See "Conflicts of Interest."
    
 
OPINION OF FINANCIAL ADVISOR
 
     In its role as financial advisor to Chemex, Advisory Capital Partners
("ACP") was asked by Chemex to render its opinion to the Chemex Board of
Directors as to the fairness to the Chemex Stockholders, from a financial point
of view, of the Merger.
 
     On September 27, 1995, ACP orally advised Chemex that, as of such date, the
Merger was fair, from a financial point of view, to the holders of outstanding
shares of Chemex Common Stock. ACP subsequently confirmed its oral opinion by
delivery of a written opinion dated October 3, 1995.
 
   
     The full text of the written opinion of ACP dated October 3, 1995, which
sets forth, among other things, the assumptions made, matters considered and
limitations of the review undertaken, is attached as Exhibit B to this Proxy
Statement/Prospectus. Chemex Stockholders are urged to read such opinion in its
entirety. ACP's opinion is directed to the Chemex Board of Directors, addresses
only the fairness of the Merger to the Chemex Stockholders from a financial
point of view and does not constitute a recommendation to any Chemex Stockholder
as to how such stockholder should vote at the Special Meeting. The opinion was
rendered to the Chemex Board of Directors in connection with its consideration
in whether to approve the Merger. Additionally, ACP's opinion does not express
an opinion as to the price or trading range at which the Chemex Common Stock
will trade subsequent to the date of its opinion. The summary of the opinion of
ACP in this Proxy Statement/Prospectus is qualified in its entirety by reference
to the full text of such opinion.
    
 
     In connection with its opinion, ACP (i) reviewed the Merger Agreement; (ii)
reviewed and analyzed certain publicly available information concerning Chemex;
(iii) reviewed and analyzed certain internal financial and operating information
with respect to the business, operations and prospects of Chemex furnished to
ACP by Chemex; (iv) reviewed and analyzed certain internal financial and
operating information with respect to the business, operations and prospects of
ACCESS furnished to ACP by ACCESS; (v) reviewed and analyzed certain financial
forecasts of Chemex and ACCESS prepared by their respective managements; (vi)
discussed the past and current operations and financial condition and the
prospects of Chemex with senior management of Chemex; (vii) discussed the past
and current operations and financial condition and the prospects of ACCESS with
senior management of ACCESS; (viii) discussed the strategic and operating
benefits anticipated from the Merger with the senior management of each of
Chemex and ACCESS; (ix) visited Chemex's facility in Fort Lee, New Jersey; (x)
visited ACCESS' facility in Dallas,
 
                                       23
<PAGE>   35
 
Texas (xi) reviewed the price and trading history of Chemex Common Stock; and
(xii) analyzed the pro
forma financial effect of the Merger.
 
     ACP assumed and relied upon, without independent verification, the accuracy
and completeness of the information reviewed by it for purposes of its opinion.
With respect to financial projections, ACP assumed that they had been reasonably
prepared on bases reflecting the best currently available information and
judgments of the future financial performance of Chemex and ACCESS. ACP has not
made an independent valuation or appraisal of the assets or liabilities of
Chemex. ACP has also assumed the Merger will be treated as a tax-free
reorganization. ACP's opinion is necessarily based upon financial, economic,
market and other conditions as they existed on, and information made available
to it as of, the date of the opinion.
 
     The following is a brief summary of certain of the financial analyses
utilized by ACP in connection with providing its written opinion to the Chemex
Board of Directors on October 3, 1995.
 
     Comparable Company and Comparable Transaction Analyses:  Due to the
substantial operating losses experienced by Chemex recently and the cessation of
its research and development activities, ACP concluded that comparison of
financial information of Chemex with that of other publicly traded companies
actively pursuing the drug development business and comparison of multiples in
completed merger and acquisition transactions of active drug development
companies to those in the Merger would not provide meaningful data.
 
     Trading History:  ACP examined the history of trading prices and volumes in
the Chemex Common Stock in order to determine whether an open and active market
existed and how this might be affected by the Merger. Chemex's Common Stock was
delisted from Nasdaq on April 27, 1995 for failure to meet the net equity
requirements. ACP believes that the increase in book value and improvement in
equity financing prospects for Chemex resulting from the Merger improve the
probability that Chemex may in the future meet Nasdaq's net equity requirements
and again be listed. Given the reduced liquidity experienced by holders of
unlisted stocks as compared to listed stocks generally, ACP concluded that the
holders of Chemex Common Stock may experience an improvement in the liquidity of
the market for their shares as a result of the Merger.
 
     Contribution Analysis:  ACP analyzed the pro forma contribution of each of
Chemex and ACCESS to the combined company if the Merger were to be consummated.
The pro forma figures reflect the adjusted contribution levels of each company
for the 12 months ended June 30, 1995. ACP calculated that each of Chemex and
ACCESS contributes 44% and 56% to pro forma book value, and 46% and 54% to pro
forma revenues, respectively. ACP also calculated that each of Chemex and ACCESS
contributes 87% and 13% to pro forma operating loss, 87% and 13% to pro forma
pre-tax loss, and 87% and 13% to pro forma net loss, respectively. This
contribution analysis was then compared to the pro forma ownership percentage of
Chemex Stockholders in the combined company of 39% (assuming that ACCESS
Stockholders do not receive and exercise warrants for 750,000 shares of Chemex
Common Stock upon the achievement of certain milestones). The results of these
contribution analyses are not necessarily indicative of the future contributions
of each company.
 
     Pro Forma Analysis:  ACP analyzed certain pro forma effects of the Merger
on the combined companies' earnings per share. ACP found a change in loss per
share of $(0.28) to $(0.12) for the 12 month period ended June 30, 1995, a
reduction of 56%.
 
     Discounted Cash Flow Analysis:  ACP performed a discounted cash flow
analysis of Chemex based on three projections having varying assumptions for the
fiscal periods 1996 to 2009 which were provided by the management of Chemex. In
performing its analysis, ACP applied discount rates ranging from 20% to 30% and
a terminal value multiple of 10 to 15 times operating income. The resulting
range of values, from $4.4 million to $9.4 million in aggregate, or from $0.50
to $1.07 per share, was compared to the contribution of ACCESS to the combined
companies.
 
     ACP performed a discounted cash flow analysis of ACCESS based on fiscal
1996 to 2001 projections provided by the management of ACCESS. In performing its
analysis, ACP applied discount rates ranging from 30% to 50% and a terminal
value multiple of 10 to 20 times operating income. The resulting range of values
of the contribution of ACCESS to the combined companies was from $9.7 million to
$37.0 million in aggregate, or $0.67 to $2.55 per Chemex share received in the
merger (assuming ACCESS Stockholders do
 
                                       24
<PAGE>   36
 
receive and exercise their warrant for an additional 750,000 shares of Chemex
Common Stock on the achievement of certain milestones).
 
     Based upon the range of values obtained from the discounted cash flow
analyses of Chemex and ACCESS, ACP observed that Chemex would contribute from
11% to 49% of the value of the combined companies while stockholders would own
from 38% to 39% of the stock of the combined companies (depending upon the
exercise of ACCESS' warrant for 750,000 additional shares of Chemex Common
Stock).
 
     The summary set forth above does not purport to be a complete description
of the analyses performed by ACP in arriving at its opinion. The preparation of
a fairness opinion is a complex process and is not necessarily susceptible to
partial analysis or summary description. ACP believes that its analyses and
summary set forth above must be considered as a whole and that selecting
portions of its analyses, without considering all analyses, or of the above
summary, without considering all factors and analyses, could create an
incomplete view of the process underlying the analyses performed by ACP in
connection with the preparation of its opinion letter. In performing its
analyses, ACP made numerous assumptions with respect to industry performance,
general business and economic conditions and other matters, many of which are
beyond the control of Chemex and ACCESS. The analyses performed by ACP are not
necessarily indications of actual values or actual future results, which may be
significantly more or less favorable than suggested by such analyses. In
addition, analyses relating to value of a business do not purport to be
appraisals or to reflect the prices at which businesses actually may be sold.
 
     ACP is an investment banking, advisory and principal investment firm
engaged in private placements, mergers, acquisitions, divestitures, valuations,
integrated advisory services to managements and Boards of Directors, and
principal investing. ACP has not provided investment banking services to Chemex
prior to its services related to the Merger. Chemex will pay ACP a fee of
$75,000 for its services regarding the Merger, of which $37,500 has been paid to
date, plus the reimbursement of certain out-of-pocket expenses. ACP's fee was
not contingent on the conclusion reached in its opinion. In addition, Chemex has
agreed to indemnify ACP and certain related persons against certain losses,
claims, damages or liabilities, including certain liabilities under the federal
securities laws, which may be incurred by ACP in connection with its engagement
by Chemex.
 
ACCOUNTING TREATMENT OF THE MERGER
 
     Pursuant to the Merger, each share of ACCESS Common Stock will be converted
into 3.7744 shares of Chemex Common Stock (subject to adjustment pursuant to the
Net Cash Adjustment and as otherwise provided by the Merger Agreement).
 
     As a result of the Merger, ACCESS Stockholders will own approximately
13,750,000 shares of Chemex Common Stock which will constitute approximately 60%
of the issued and outstanding shares of Chemex Common Stock. Following the
transaction, Chemex will continue as a publicly traded corporation. The Merger
will result in ACCESS obtaining a majority voting interest in Chemex. Generally
accepted accounting principles require that a company whose stockholders retain
the controlling interest in a combined business be treated as the acquirer for
accounting purposes. As a consequence, the Merger will be accounted for as a
"reverse acquisition" for financial reporting purposes and ACCESS will be deemed
to have acquired, at the Effective Time, an approximate 60% interest in Chemex.
Despite the financial reporting requirement to account for the acquisition as a
"reverse acquisition," Chemex remains the continuing legal entity and registrant
for Commission reporting purposes. At the Effective Time, Chemex will change its
name to "ACCESS Pharmaceuticals, Inc."
 
CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER
 
     The following discussion summarizes the principal Federal income tax
consequences associated with the Merger under the Internal Revenue Code of 1986,
as amended (the "Code"), assuming that the Merger is consummated as contemplated
herein. The discussion is based upon currently existing provisions of the Code,
existing and proposed Treasury regulations thereunder, and current
administrative rulings and court decisions.
 
                                       25
<PAGE>   37
 
All of the foregoing are subject to change and any such change could affect the
continuing validity of this discussion.
 
   
     Because there is some uncertainty concerning certain of the Federal income
tax consequences associated with the Merger and because the following discussion
does not describe all of the potentially relevant tax consequences, each holder
of ACCESS Common Stock should consult his own tax advisor regarding the tax
consequences of the Merger in light of such holder's own situation, including
the application and effect of any state, local or foreign income and other tax
laws. In particular, the discussion set forth below may not be applicable to
special classes of taxpayers including, without limitation, foreign persons,
tax-exempt entities and holders who acquired their ACCESS Common Stock pursuant
to the exercise of an employee stock option or otherwise as compensation or who
hold restricted stock. Moreover, holders of ACCESS Common Stock should be aware
that the Federal income tax rate for individuals on long-term capital gains may
be significantly lower than the rate imposed on ordinary income or short-term
capital gain.
    
 
     In General.  No rulings have been or will be requested from the Internal
Revenue Service (the "IRS") with respect to any of the matters discussed herein.
Consummation of the Merger is conditioned on there being delivered the opinions
of Robert McGuinness, counsel to ACCESS, and Bingham, Dana & Gould, counsel to
Chemex, that for federal income tax purposes, under current law, assuming that
the Merger will take place as described in the Merger Agreement, the Merger will
constitute a reorganization within the meaning of Section 368(a) of the Code,
and ACCESS and Chemex will each be a party to the reorganization within the
meaning of Section 368(b) of the Code. Any such opinion will be based on certain
assumptions as well as on representations received from ACCESS, Chemex and
certain shareholders of ACCESS. The following discussion assumes the Merger will
qualify as a reorganization.
 
     Exchange of ACCESS Common Stock pursuant to the Merger will have the
Federal income tax consequences described below. The discussion below assumes
that the ACCESS Stock exchanged by each holder in the Merger is held as a
capital asset.
 
     Exchange of ACCESS Common Stock for Chemex Common Stock.  A holder who
exchanges his ACCESS Common Stock for Chemex Common Stock in the Merger will not
recognize gain or loss on the exchange. The aggregate tax basis of the Chemex
Common Stock received will be equal to the aggregate tax basis of the ACCESS
Stock exchanged, and the holding period of the Chemex Common Stock received will
include the holding period of the ACCESS Common Stock exchanged.
 
     Exchange of ACCESS Common Stock Solely for Cash.  If a holder exchanges all
of his ACCESS Common Stock solely for cash in the Merger pursuant to the
exercise of dissenter's rights, (a) if such holder does not own (actually or
constructively) Chemex Common Stock immediately after the Merger, then such
holder will recognize capital gain or loss equal to the difference between the
basis of the ACCESS Stock surrendered and the cash received and (b) if such
holder owns (actually or constructively) Chemex Common Stock immediately after
the Merger, then it is not clear whether such holder will automatically
recognize capital gain or loss or instead may possibly be treated as recognizing
a dividend, taxable at ordinary income rates. If the holder is treated as
receiving a dividend, the entire amount of the cash received (without regard to
any limitation measured by gain) may be treated as a dividend.
 
   
     Backup Withholding.  In order to avoid "backup withholding" of Federal
income tax on payments of cash to a holder who received cash pursuant to
appraisal or dissenter's rights, a holder must, unless an exception applies
under the applicable law and regulations, provide the payor of such cash with
such holder's correct taxpayer identification number ("TIN") on a Form W-9 and
certify under penalties of perjury that such number is correct and that such
holder is not subject to backup withholding. A Form W-9 will be included as a
part of the Transmittal Materials (as defined below under "The Merger
Agreement -- Exchange of Stock Certificates"). If the correct TIN and
certifications are not provided, a $50 penalty may be imposed on the holder by
the IRS and any cash payments received by the holder in exchange for shares may
be subject to backup withholding tax at a rate of 31%.
    
 
     Tax Treatment of Chemex and ACCESS.  No gain or loss will be recognized by
Chemex or ACCESS as a result of the Merger. The basis of the ACCESS assets
acquired by Chemex will be, in each instance, the
 
                                       26
<PAGE>   38
 
   
same as the basis for those assets in the hands of ACCESS immediately prior to
the Merger, and the holding period of those assets in the hands of Chemex will
include, in each instance, the holding period of those assets in the hand of
ACCESS.
    
 
   
     As of December 31, 1994, Chemex's net operating losses ("NOLs") for federal
income tax purposes, as shown in the Notes to Consolidated Financial Statements
of Chemex, were approximately $34 million, and were due to begin to expire
commencing in the year 2009. As of that same date, ACCESS NOLs, as shown in the
Notes to Financial Statement of ACCESS were approximately $400,000, and were due
to begin to expire in varying amounts through the year 2005. As a result of the
Merger, Chemex expects to incur, and ACCESS may but does not expect to incur, an
"ownership change" under federal tax law. As a result, any NOLs incurred prior
to an ownership change will be subject to an annual limit for use in subsequent
years equal to the corporation's value at the time of the ownership change
multiplied by a percentage equal to the federal long-term tax-exempt interest
rate (5.85 percent during December 1995). Unused NOLs continue to be carried
forward until they expire, subject to these limitations. Other limitations to
NOLs and tax credits of Chemex and ACCESS may apply as a result of the Merger.
Similar limitations may apply to credit carrybacks.
    
 
     For state income tax purposes, use of existing New Jersey NOLs is limited
by reference to income subject to tax in New Jersey. As described above under
the caption "Operations After the Merger," it is presently expected that the
Surviving Corporation will be located in Texas. As a result, its income subject
to New Jersey tax, and consequently its ability to use New Jersey NOLs, may be
substantially reduced.
 
THE MERGER AGREEMENT
 
     General.  The following is a brief summary of certain provisions of the
Merger Agreement and their effect. This summary is not intended to be a complete
statement of all material provisions of the Merger Agreement and is qualified in
its entirety by reference to the full text of the Merger Agreement, a copy of
which is attached as Exhibit A and incorporated herein by reference in its
entirety.
 
  Effective Time of the Merger
 
     The Merger Agreement provides that, at the Effective Time, each then
outstanding share of ACCESS Common Stock will be converted into the right to
receive, and become exchangeable for, 3.7744 shares of Chemex Common Stock
(subject to adjustment as provided in the Merger Agreement); provided, however,
that if at the Effective Time the Total Cash Assets of Chemex are less than the
Minimum Cash Assets, then, for each one dollar that the Total Cash Assets are
less than the Minimum Cash Assets, each share of ACCESS Common Stock will be
converted into the right to receive, and become exchangeable for, an additional
 .0000003635 shares of Chemex Common Stock. Such exchange ratio was established
through arms-length negotiations between Chemex and ACCESS. None of the shares
of Chemex Common Stock issued and outstanding immediately prior to the Effective
Time will be converted or otherwise modified in the Merger and all of such
shares will continue to be outstanding capital stock of Chemex after the Merger.
 
     As soon as practicable after the Effective Time, the Exchange Agent will
mail transmittal instructions and a form of letter of transmittal to each ACCESS
Stockholder to be used in forwarding his or her ACCESS stock certificates for
surrender and exchange for Chemex stock certificates and, if applicable, cash in
lieu of a fractional share of Chemex Common Stock. After receipt of such
transmittal instructions and form of transmittal letter, each former ACCESS
Stockholder should surrender his or her ACCESS stock certificates to the
Exchange Agent in accordance with the transmittal instructions. See "Exchange of
Stock Certificates" and "No Fractional Shares."
 
     After the Effective Time, each ACCESS stock certificate, until so
surrendered and exchanged, will be deemed to evidence the right to receive the
number of shares of Chemex Common Stock that the former ACCESS Stockholder is
entitled to receive pursuant to the Merger Agreement and the right to receive
any cash payment in lieu of a fractional share of Chemex Common Stock. The
holder of such unexchanged ACCESS stock certificates will not be entitled to
receive any dividends or other distributions payable by ACCESS until such ACCESS
stock certificates are surrendered. Subject to applicable laws, any such
 
                                       27
<PAGE>   39
 
dividends and distributions after the Effective Time, if any, will be
accumulated and, at the time a former ACCESS Stockholder surrenders his or her
ACCESS stock certificates to the Exchange Agent, all such accrued and unpaid
dividends and distributions, together with any cash payment in lieu of a
fractional share of Chemex Common Stock, will be paid without interest.
 
     None of the shares of Chemex Common Stock will be converted or otherwise
modified in the Merger and all of such shares will continue to be outstanding
capital stock of Chemex after the Effective Time.
 
     Representations and Warranties.  The Merger Agreement contains various
representations and warranties of Chemex and ACCESS, respectively, relating to,
among other things, their respective: (i) corporate power, good standing and
similar corporate matters; (ii) capital structure; (iii) absence of
subsidiaries; (iv) authorization and enforceability of the Merger Agreement and
related matters; (v) absence of undisclosed liabilities; (vi) absence of certain
material adverse events or changes; (vii) litigation; (viii) compliance with
requirements of law; (ix) compliance with its Charter and Bylaws; (x) taxes;
(xi) environmental matters; (xii) status of material contacts; (xiii)
intellectual property; (xiv) insurance; (xv) accounting matters; (xvi) brokers'
and finders' fees with respect to the Merger; and (xvii) accuracy of the
information contained in the Merger Agreement and disclosure schedules thereto.
 
     Certain Covenants and Agreements.  Pursuant to the Merger Agreement, ACCESS
and Chemex have each agreed that, during the period from the date of the Merger
Agreement until the Effective Time or the earlier termination of the Merger
Agreement, each will, among other things (except as permitted by the Merger
Agreement or as consented to in writing by the other): (i) conduct its business
in the ordinary and usual course and not sell, lease or dispose of any capital
assets; (ii) not issue, sell, redeem or acquire any shares of its capital stock,
or any securities convertible into or exchangeable for shares of its capital
stock, or options, warrants, or other rights to acquire any shares of its
capital stock or make any material capital expenditure or capital additions or
enter into any leases of capital equipment; (iii) use reasonable efforts to
preserve intact its business organization and goodwill, keep available the
services of its present officers and key employees and preserve the goodwill and
business relationships with its suppliers, distributors, customers and others
having business relations with it; (iv) afford to the other and the other's
authorized representatives full access during normal business hours throughout
the period prior to the Effective Time to all of its properties, books,
contracts, commitments and records; (v) in the case of Chemex only, prepare and
file with the Commission this Proxy Statement/Prospectus and use all reasonable
efforts to have the Registration Statement of which this Proxy
Statement/Prospectus forms a part declared effective by the Commission; (vi) use
its best efforts to obtain its stockholders' approval and adoption of the Merger
Agreement and the transactions contemplated thereby; (vii) not grant any
increases in the rates of pay to its employees, consultants or officers nor by
means of any bonus, insurance, pension or stock option or other benefit plan or
other contract or commitment increase in any amount the benefits or compensation
of any such person; (viii) not obligate itself to pay severance compensation to
any officer or employee; (ix) not enter into any contract or commitment or
engage in any transaction (a) which is not in the usual and ordinary course of
business, or (b) which involves the acquisition or disposition of a material
asset or of any material technology license; (x) not create or incur any
indebtedness for borrowed money, mortgage, lien, change or encumbrance of any
kind except as provided in the Merger Agreement or guarantee or otherwise incur
any liability with respect to the obligations of any person; (xi) not declare or
pay dividends on, or make any other distribution in respect of, any shares of
its capital stock; (xii) not do any act or omit to do any act, or permit any act
or omission to act, which would cause a breach of any material contract,
commitment or obligation which would materially and adversely affect its
business or financial condition; (xiii) not establish any new subsidiary or make
or commit to make any investment in any subsidiary or other person; (xiv) duly
comply with all applicable laws; (xv) promptly advise the other party in writing
of any development or change in circumstances (including any litigation to which
it may become a party or of which it may gain knowledge) that does or could
reasonably be expected to (a) call into question the validity of the Merger
Agreement or any action to be taken thereto, (b) adversely affect the ability of
the parties to consummate the transactions contemplated by the Merger Agreement,
or (c) have a material adverse effect with respect to it; (xvi) not enter into
any transaction with any affiliate (subject to certain exceptions); (xvii) not
make any material capital expenditures or capital additions or enter into any
leases of capital equipment; and (xviii) in the case of
 
                                       28
<PAGE>   40
 
Chemex only, make, at the request of ACCESS at any time prior to the Drop Dead
Date (as such term is defined in the Merger Agreement), interestbearing loans to
ACCESS in an aggregate principal amount not to exceed $250,000.
 
     It is presently contemplated that the Merger will be completed as soon as
practicable after approval and adoption of the Merger Agreement by the Chemex
Stockholders. Subject to the rights of the respective Boards of Directors of
Chemex and Access to terminate the Merger Agreement and abandon the Merger (see
"Amendment and Termination; Waivers"), as soon as practicable after satisfaction
or waiver of all conditions to the Merger (see "Conditions of the Merger"
below), Chemex and Access will cause a Certificate of Merger (substantially in
the form of an exhibit to the Merger Agreement) to be executed and filed and
recorded in the appropriate filing and recording office of the Secretary of
State of the State of Delaware and Articles of Merger (substantially in the form
of an exhibit to the Merger Agreement) to be executed and filed in the
appropriate filing and recording office of the Secretary of State of the State
of Texas, respectively, and will take such other actions as may be necessary
under applicable law to make the Merger effective. The Merger will be effective
as of the later of the time the Certificate of Merger are duly filed with the
Secretary of State of Delaware and Articles of Merger are duly filed with the
Secretary of State of Texas (the "Effective Time").
 
EFFECTS OF THE MERGER
 
     If the Merger is consummated, then as of the Effective Time:
 
     Merger of Access into Chemex; Surviving Corporation.  Access will be merged
into Chemex and ACCESS will cease to exist as a separate entity. Chemex will
continue to exist as a Delaware corporation and the Surviving Corporation. The
Surviving Corporation's authorized capital stock will be as set forth in the
Certificate of Incorporation of Chemex, as amended by a Certificate of Amendment
substantially in the form of Exhibit E to this Proxy Statement/Prospectus. At
the Effective Time Chemex will change its name to "ACCESS Pharmaceuticals, Inc."
 
     Certificate of Incorporation and By-laws of Surviving Corporation.  The
Certificate of Incorporation of Chemex in effect as of the Effective Time will
be the Certificate of Incorporation of the Surviving Corporation, and will be
the Certificate of Incorporation of Chemex in effect as of the date hereof, as
amended by a Certificate of Amendment substantially in the form of Exhibit E to
this Proxy Statement. The Bylaws of the Surviving Corporation will be the Bylaws
of Chemex in effect as of the Effective Time.
 
     Officers and Directors of Surviving Corporation.  The respective officers
and directors of the Surviving Corporation will be as follows:
 
<TABLE>
        <S>                                                    <C>
        Officers:
        Chairman of the Board of Directors                     Herbert H McDade, Jr.
        Chief Executive Officer and President                  Kerry P. Gray
        Executive Vice President                               Dr. David F. Ranney
        Secretary                                              Herbert H. McDade, Jr.
        Assistant Secretary and Chief Financial Officer        Stephen B. Thompson
        Assistant Secretary                                    Justin P. Morreale
        Directors:
        J. Michael Flinn
        Kerry P. Gray
        Elizabeth M. Greetham
        Herbert H. McDade, Jr.
        Dr. David F. Ranney
</TABLE>
 
     In addition, pursuant to the terms of the Merger Agreement, one other
director will be chosen by ACCESS and one director will be chosen jointly by
ACCESS and Chemex. See "Management of Chemex"
 
                                       29
<PAGE>   41
 
for biographies of Mrs. Greetham and Messrs. McDade and Flinn and "Management of
ACCESS" for biographies of Messrs. Gray and Ranney.
 
     Subject to the applicable provisions of the Certificate of Incorporation
and Bylaws of the Surviving Corporation, each such person will hold the office
indicated above until the next annual meeting of directors or stockholders, as
the case may be, of the Surviving Corporation and until his or her successor is
duly elected and qualified.
 
     Additional Consideration.  The Surviving Corporation may be required to
issue up to 750,000 warrants, each exercisable for the purchase of one share of
Chemex Common Stock with a five-year expiration from the date of the issue at an
exercise price of $0.75 per share issued on a pro rata basis to the stockholders
of record of Access Common Stock at the Effective Time as follows:
 
     a) 350,000 warrants will be issuable upon the Surviving Corporation signing
        a binding MRI contrast agent development agreement which provides for
        guaranteed minimum payments of $3,000,000 during the initial two year
        period of the Merger Agreement; or
 
     b) 400,000 warrants will be issuable upon the Surviving Corporation signing
        a binding small molecule oncology development agreement which provides
        for guaranteed minimum payments of $4,000,000 during the initial two
        year period of the Merger Agreement.
 
     c) to qualify for the issuance of warrants under the terms of the Merger
        Agreement either of such development agreements must be signed within
        twelve months of the closing of the Merger.
 
   
ISSUANCE OF CHEMEX COMMON STOCK PURSUANT TO THE MERGER
    
 
   
     At the Effective Time each outstanding share of ACCESS Common Stock will be
converted into the right to receive, and become exchangeable for (as adjusted
pursuant to the Merger Agreement, the "Conversion Number"), 3.7744 shares of
Chemex Common Stock; provided, however, that, if at the Effective Time the Total
Cash Assets of Chemex are less than the Minimum Cash Assets, then, for each one
dollar that the Total Cash Assets are less than the Minimum Cash Assets, each
share of ACCESS Common Stock will be converted into the right to receive, and
become exchangeable for, an additional .0000003635 shares of Chemex Common Stock
(the "Net Cash Adjustment").
    
 
   
     The Registration Statement of which this Proxy Statement/Prospectus is a
part relates to up to 14,100,000 shares of Chemex Common Stock. Pursuant to the
terms of the Merger Agreement, it is a condition to ACCESS's obligations under
the Merger Agreement that the Total Cash Assets of Chemex be equal to at least
$1.6 million minus (a) any and all prepaid premium payments made in the ordinary
course of business for continuing insurance coverage and (b) the outstanding
principal amounts of any loans from Chemex to ACCESS (the "ACCESS Condition
Amount"). (See "Conditions to the Merger") if the Total Cash Assets of Chemex at
the Effective Time were $1.6 million, pursuant to the terms of the Merger
Agreement, Chemex would, based on the number of shares of ACCESS Common Stock
and Chemex Common Stock issued and outstanding at September 30, 1995, issue
approximately 14,100,000 shares of Chemex Common Stock in the aggregate to the
holders of ACCESS Common Stock.
    
 
   
     If the Total Cash Assets of Chemex at the Effective Time are less that the
ACCESS Condition Amount and ACCESS waives this condition, pursuant to the terms
of the Merger Agreement Chemex would be obligated to issue more shares of Chemex
Common Stock to the holders of the ACCESS Common Stock exchanged in the Merger
as determined by reference to the Merger Agreement. If, however, the Total Cash
Assets of Chemex at the Effective Time is greater than the ACCESS Condition
Amount, Chemex would be obligated to issue less shares of Chemex Common Stock to
the holders of the ACCESS Common Stock exchanged in the Merger as determined by
reference to the Merger Agreement. The Total Cash Assets of Chemex as of
December 14, 1995 was approximately $1.8 million which includes provision for
the currently estimated costs of the Merger and for certain other costs to such
date relating to the operations and other obligations of Chemex. The management
of Chemex currently believes that the Total Cash Assets of Chemex will be at
least equal to the ACCESS Condition Amount at the Effective Time.
    
 
                                       30
<PAGE>   42
 
CONDITIONS TO THE MERGER
 
     The respective obligations of Chemex and ACCESS to consummate the Merger
are subject to the satisfaction, at or prior to the closing of the Merger, of
certain conditions, including, among others, the following: (i) the approval of
the Merger by the stockholders of Chemex and ACCESS, respectively; (ii) the
amendment of Chemex's Certificate of Incorporation by the filing of a
Certificate of Amendment substantially in the form of Exhibit E of this Proxy
Statement; (iii) the receipt of any necessary approvals of governmental
authorities; (iv) the execution and delivery to Chemex of the Stockholder's
Agreement by Dr. David Ranney, substantially in the form outlined in the Merger
Agreement; (v) the continued effectiveness of the Registration Statement on Form
S-4 and the absence of any stop order or proceedings therefor in connection with
such Registration Statement; (vi) the receipt and continued effectiveness of all
necessary state securities law and "blue sky" approvals and clearances; (vii)
the absence of any injunction or other legal restraint on the consummation of
the Merger or litigation relating to the same; (viii) holders of at least 90% of
the outstanding shares of ACCESS Common Stock shall have voted in favor of or
consented to the Merger or shall otherwise have waived or failed to perfect any
appraisal rights they may be entitled to under the Texas Business Corporation
Act. (See "Appraisal Rights" and "Agreement to Vote in Favor of the Merger");
(ix) the continued accuracy in all material respects of the other party's
representations and warranties, and the compliance in all material respects by
the other party with its covenants and agreements, set forth in the Merger
Agreement; (x) the receipt by Chemex from its financial advisor of written
confirmation as of the Closing Date of such advisor's opinion that the terms of
the Merger are fair to the Chemex Stockholders from a financial point of view.
(See "The Proposed Merger -- Opinions of Financial Advisor."); (xi) the receipt
by such party of an opinion of counsel to the other party with respect to
certain legal matters in connection with the Merger; (xii) the receipt by such
party of an opinion of its special tax counsel with respect to certain tax
matters in connection with the Merger; (xiii) the absence of any obligation (or
potential obligation) of the other party to make any compensation or other
payments to its officers or employees as a result of the transactions
contemplated by the Merger Agreement (except as set forth in the Merger
Agreement); and (xiv) at the Effective Time Chemex shall have cash and cash
equivalents of at least $1,600,000 minus (a) any and all prepaid premium
payments made in the ordinary course of business for continuing insurance
coverage and (b) the outstanding principal amounts of any loans from Chemex to
ACCESS.
 
AMENDMENT AND TERMINATION; WAIVERS
 
     The Merger Agreement may be amended in any manner and at any time by mutual
agreement of Chemex and ACCESS.
 
     The Merger Agreement may be terminated and the Merger abandoned at any time
prior to the Effective Time, whether before or after approval of the Merger by
the stockholders of either or both of Chemex and ACCESS, only as follows: (i) by
either Chemex or ACCESS, by written notice to the other, if all of the
conditions precedent to the consummation of the Merger Agreement have not been
satisfied or waived by February 28, 1996 (the "Drop-Dead Date"); (ii) by either
Chemex or ACCESS, upon written notice to the other, if the other has materially
breached any of its covenants or agreements set forth in the Merger Agreement
and such breach has not been cured within thirty calendar days after written
notice thereof from the non-breaching party; (iii) by either Chemex or ACCESS,
if any temporary restraining order, preliminary or permanent injunction or other
order issued by any court of competent jurisdiction, or other legal restraint or
prohibition with respect to the consummation of the Merger, shall at any time be
in effect for a period of more than ten consecutive business days, or is in
effect as of the Drop-Dead Date, or any petition or request therefor is pending
on or after the Drop-Dead Date; and (iv) at any time by mutual agreement of the
respective Boards of Directors of Chemex and ACCESS.
 
     Except for the Break Up Fees described below, any such termination will be
without liability or further obligation on the part of either Chemex or ACCESS
unless such termination is the result of a material breach of the Merger
Agreement, including any material inaccuracy of any representation or warranty
contained therein.
 
                                       31
<PAGE>   43
 
     Any provision of the Merger Agreement, including the conditions to the
parties' respective obligations to consummate the Merger, may be waived in
writing by the party entitled to the benefits of such provision.
 
BREAK UP FEES
 
     If on or before the Drop Dead Date there is announced the acquisition or
merger of Chemex by or with any entity or the execution and delivery by Chemex,
without the consent of ACCESS, of any legally binding agreement relating to such
a merger or acquisition, there will be paid to ACCESS, within thirty days of the
announcement of such other transaction, a fee of $600,000. If on or before the
Drop Dead Date there is announced the acquisition or merger of ACCESS by or with
any entity or the entering into, without the prior written consent of Chemex of
any other arrangement for the financing of the technology development of ACCESS
or the execution and delivery by ACCESS, without the consent of Chemex of any
legally binding agreement relating to such a merger or acquisition or for the
financing of the technology development of ACCESS there will be paid to Chemex
upon the consummation of the other transaction a fee of $600,000. Neither fee
will be payable in the event of any uncured breach of either Chemex or ACCESS of
their respective obligations under the Merger Agreement.
 
NO SURVIVAL OF REPRESENTATIONS AND WARRANTIES
 
     The respective representations, warranties, obligations, agreements, and
promises of Chemex and ACCESS contained in the Merger Agreement and the
documents delivered or to be delivered pursuant to the Merger Agreement, other
than those that by their terms apply to the Surviving Corporation after the
Effective Time of the Merger, will terminate as of, and will not survive, the
Effective Time of the Merger.
 
EXPENSES
 
     Each of Chemex and ACCESS will bear all of its own expenses incurred in
connection with the Merger. Any amounts payable to the Financial Advisor of
Chemex in connection with the Merger Agreement and the Merger and the other
transactions contemplated thereby will be the responsibility of Chemex.
 
STOCKHOLDER'S AGREEMENT
 
     It is a condition to Chemex's obligations under the Merger Agreement that,
prior to the closing of the transactions contemplated by the Merger Agreement,
Dr. David Ranney execute and deliver to Chemex a Stockholder's Agreement
providing for, among other matters, certain rights of Dr. David Ranney to be
nominated or to have his nominee nominated for election to the Board of
Directors of Chemex at any election of Chemex directors; a right of first
refusal by Dr. David Ranney to license or purchase certain technology and
intellectual property of Chemex under certain conditions; an agreement to amend
that certain Patent Purchase Agreement, dated as of April 5, 1994 between Dr.
David Ranney and ACCESS, regarding certain royalties payable to Dr. David Ranney
relating to certain technology and intellectual property of ACCESS; an
agreement, subject to certain conditions, by Dr. David Ranney to vote all shares
of the capital stock of Chemex for which he has voting power in the manner
recommended by the Board of Directors of Chemex in any proposal presented to the
Chemex Stockholders; and an agreement, subject to certain conditions, by Dr.
David Ranney not to sell, transfer or otherwise dispose of his shares of the
capital stock of Chemex for a period of six months following the Effective Time
of the Merger. Dr. David Ranney executed and delivered the Stockholder's
Agreement to Chemex on October 3, 1995. "See Certain Relationships and Related
Transactions -- ACCESS."
 
AGREEMENT TO VOTE IN FAVOR OF THE MERGER
 
     Pursuant to a Letter Agreement, dated September 1, 1995, Dr. David Ranney,
the Executive Vice President and a director of ACCESS, and the beneficial owner,
as of such date, of 64.8% of the issued and outstanding ACCESS Common Stock,
agreed with Chemex, subject to certain conditions, to vote at any meeting of the
shareholders of ACCESS which considers the Merger, all shares of the capital
stock of ACCESS beneficially owned by him in favor of authorizing and approving
the Merger and any and all other transactions, agreements, documents or
instruments reasonably related to the same.
 
                                       32
<PAGE>   44
 
              AMENDMENT OF THE CHEMEX CERTIFICATE OF INCORPORATION
 
     The Board of Directors of Chemex has approved an amendment to the
Certificate of Incorporation of Chemex to increase the number of shares of
Chemex Common Stock which Chemex shall be authorized to issue from 20,000,000 to
40,000,000 and the number of shares of Chemex Preferred Stock which Chemex shall
be authorized to issue from 5,000,000 to 10,000,000. The additional shares of
Chemex Common Stock and Chemex Preferred Stock may be issued from time to time
as the Board of Directors of Chemex may determine without further action by the
Chemex Stockholders. With the exception of the issuance of Chemex Common Stock
upon the consummation of the Merger and upon the exercise of options granted or
to be granted pursuant to the Chemex 1995 Stock Option Plan, the 1987 Stock
Option Plan and the Non-Employee Director Stock Option Plan and upon the
exercise any ACCESS Warrants and upon the exercise of warrants to be granted
pursuant to the terms of the Merger Agreement and the exercise of any rights to
receive shares of Chemex Common Stock pursuant to currently existing agreements,
the issuance of any other additional shares of Chemex Common Stock authorized by
the proposed amendment is not presently contemplated. Except for the Merger
Agreement, Chemex does not currently have any agreements, arrangements or
understandings with respect to any acquisition, financing, stock split or
dividend. The form of Certificate of Amendment is attached hereto as Exhibit E.
 
     Chemex Stockholders do not currently possess, nor upon the adoption of the
proposed amendment will they acquire, preemptive rights which would entitle such
persons, as a matter of right, to subscribe for the purchase of any securities
of Chemex.
 
     The affirmative vote of a majority of all of the outstanding shares of
Chemex Common stock is required for the approval of this proposal. The Board of
Directors of Chemex unanimously recommends a vote "FOR" this proposal.
 
THE NAME CHANGE
 
     The Board of Directors of Chemex has approved an amendment to the
Certificate of Incorporation of Chemex to change the name of Chemex to ACCESS
Pharmaceuticals, Inc.
 
     The Board of Directors of Chemex unanimously recommends a vote "FOR" this
proposal.
 
             THE RATIFICATION OF THE CHEMEX 1995 STOCK OPTION PLAN
 
     The Board of Directors of Chemex has authorized, subject to stockholder
ratification, the establishment of the Chemex 1995 Stock Option Plan under which
an aggregate of 2,000,000 shares of Chemex Common Stock will be subject to
options issuable pursuant to such plan (the "1995 Stock Option Plan"). The
purpose of the 1995 Stock Option Plan is to provide for the issuance of Chemex
Common Stock to allow for grants to employees, officers, directors and
consultants of Chemex. If the 1995 Stock Option Plan is approved, no further
option grants will be made under Chemex's 1987 Stock Option Plan or Chemex's
Non-Employee Director Stock Option Plan. As of October 31, 1995 there were
options outstanding under the 1987 Stock Option Plan to purchase an aggregate of
approximately 915,000 shares of Chemex Common Stock and options outstanding
under the Non-Employee Director Plan to purchase approximately 276,000 shares of
Chemex Common Stock.
 
1995 STOCK OPTION PLAN
 
     The 1995 Stock Option Plan will replace Chemex's 1987 Stock Option Plan
which provided for grants of Common Stock options to officers, directors and key
employees of Chemex and the Chemex Non-Employee Director Stock Option Plan
(which provided for grants of Common Stock on a formula basis to non-employee
directors of Chemex). The following is a description of the material provisions
of the 1995 Stock Option Plan. A copy of the 1995 Stock Option Plan is set forth
as Exhibit F to this Proxy Statement/Prospectus. The summary of the provisions
of the 1995 Stock Option Plan which follows is not intended to be complete and
reference should be made to the 1995 Stock Option Plan for a complete statement
of its terms and provisions.
 
                                       33
<PAGE>   45
 
GENERAL
 
     The 1995 Stock Option Plan authorizes the granting of "incentive stock
options" as defined in Section 422A of the Internal Revenue Code of 1986, as
amended (the "Code") and non-qualified stock options. See "Administration and
Duration." The 1995 Stock Option Plan is not subject to the provisions of the
Employee Retirement Income Security Act of 1974, as amended, and is not a
qualified plan under Section 401(a) of the Code. Proceeds received by Chemex
from the sale of Common Stock pursuant to the exercise of options under the 1995
Stock Option Plan will be used for general corporate purposes.
 
SECURITIES SUBJECT TO THE 1995 STOCK OPTION PLAN AND MARKET VALUE
 
     Under the 1995 Stock Option Plan, options may be granted covering up to an
aggregate of 2,000,000 shares of Chemex Common Stock. The 1995 Stock Option Plan
provides for appropriate adjustments in the number and kind of shares subject to
the 1995 Stock Option Plan in the event of a stock split, stock dividend, or
certain other similar changes in the Common Stock, and in the event of a
reorganization, merger, consolidation or certain other types of recapitalization
of Chemex.
 
ELIGIBILITY TO PARTICIPATE
 
     Any executive, other key employee or director of, or advisor or consultant
to, Chemex or of any of Chemex's subsidiaries or parent corporation is eligible
to be granted options under the 1995 Stock Option Plan. No election by any such
person is required to participate in the 1995 Stock Option Plan. At September
30, 1995, there were two employees eligible to participate in the 1987 Stock
Option Plan and six directors eligible to participate in the Non-Employee
Director Stock Option Plan. Upon consummation of the merger, approximately
twenty additional persons are expected to be eligible to participate in the 1995
Stock Option Plan.
 
ADMINISTRATION AND DURATION
 
     The 1995 Stock Option Plan will be administered by a committee (the
"Committee") consisting of two or more directors appointed by the Board, each of
whom is a "disinterested person" as defined by Rule 16b-3 under the Exchange
Act. The Committee is authorized to determine which employees of Chemex are
executive or other key employees and select from among the executive or other
key employees and the advisors and consultants the individuals to whom options
are to be granted, to determine the number of shares to be subject to such
options, to determine whether such options will be incentive stock options or
non-qualified stock options and to determine the terms and conditions of the
options, consistent with the 1995 Stock Option Plan. The Committee has full
power to interpret the 1995 Stock Option Plan and the options and to adopt such
rules for the administration, interpretation and application of the 1995 Stock
Option Plan as are consistent therewith and to interpret, amend or revoke any
such rules. Members of the Committee shall receive such compensation for their
services as members as may be determined by the Board of Directors. All expenses
and liabilities incurred by members of the Committee in connection with the
administration of the 1995 Stock Option Plan shall be borne by Chemex. No member
of the Committee shall be liable for any act, determination or interpretation
made in good faith with respect to the 1995 Stock Option Plan or the options
granted thereunder. No options may be granted under the 1995 Stock Option Plan
after the expiration of ten years after the date the 1995 Stock Option Plan was
adopted by the Board of Directors. Options granted before termination of the
1995 Stock Option Plan will remain exercisable in accordance with their
respective terms after termination of the 1995 Stock Option Plan.
Notwithstanding the above description of the administration of the 1995 Stock
Option Plan with regard to the granting of options, option grants to non-
employee directors under the 1995 Stock Option Plan will be made on a formula
basis only, whereby each director of Chemex will receive, upon his or her
initial election or appointment to the Board, options exercisable for 30,000
shares of Chemex Common Stock and will receive, at each subsequent election of
directors of Chemex at which he or she is re-elected to the Board of Directors
of Chemex, options exercisable
for 20,000 shares of Chemex Common Stock. All options granted to non-employee
directors pursuant to the terms of the 1995 Stock Option Plan will be
non-qualified options.
 
                                       34
<PAGE>   46
 
PLAN AMENDMENTS
 
     The Chemex Stockholders must approve all amendments to the 1995 Stock
Option Plan which increase the maximum number of shares which may be issued upon
exercise of options (except for antidilution adjustments), materially modify the
eligibility requirements, reduce the minimum option price requirements or extend
the duration of the 1995 Stock Option Plan or amend or modify the 1995 Stock
Option Plan in a manner requiring shareholder approval under Rule 16b-3 under
the Exchange Act. In all other respects, the 1995 Stock Option Plan may be
amended, suspended or terminated by the Committee. No such amendment, suspension
or termination may, however, alter or impair the rights or obligations of the
holders of outstanding options without the consent of such holders.
 
OPTIONS NOT TRANSFERABLE
 
     No options granted under the 1995 Stock Option Plan shall be transferable;
provided, however, that nothing prevents transfers by will or by the applicable
laws of descent and distribution. The Committee may require that an optionee
give Chemex prompt notice of any disposition of shares of Common Stock acquired
by exercise of an incentive stock option within two years from the date of
granting such option, or within one year after transfer of such shares.
 
RESTRICTIONS ON RESALE
 
     Until such time as Chemex has filed and had declared effective a
Registration Statement on Form S-8 covering the issuance of shares of Common
Stock upon exercise of options granted under the 1995 Stock Option Plan,
employees, officers and directors may not offer or resell shares acquired under
the 1995 Stock Option Plan without compliance with Rule 144 promulgated under
the Securities Act or registration under the Securities Act.
 
TERM OF OPTIONS
 
     All options terminate on the earliest of: (a) the expiration of the term
specified in the option document, which may not exceed ten years from the date
of grant; (b) the expiration of three months from the date an option holder's
employment or service with Chemex or its subsidiaries terminates for any reason
other than disability, death or as set forth in clause (d) below); (c) the
expiration of one year from the date an option holder's employment or service
with Chemex or its subsidiaries terminates by reason of such option holder's
disability or death. The Committee, in its discretion, may provide for
additional limitations on the term of any option
 
OPTION PRICE
 
     The option price for non-qualified options may be less than, equal to or
greater than the fair market value of the shares subject to the option on the
date that the option is granted, and for incentive stock options will be at
least 100% of the fair market value of the shares subject to the option on the
date that the option is granted.
 
CERTAIN RULES FOR CERTAIN STOCKHOLDERS
 
     If an incentive stock option is granted to an employee who then owns,
directly or by attribution under the Code, shares possessing more than 10% of
the total combined voting power of all classes of shares of Chemex capital
stock, the term of the option may not exceed five years and the option price
must be at least 110% of the fair market value of the shares on the date that
the option is granted.
 
PAYMENT
 
     An option holder may pay for shares covered by an option in cash or by
certified or cashier's check payable to the order of Chemex, by payment through
a broker in accordance with Regulation T of the Federal Reserve Board or by such
other mode of payment as the Committee may approve, including payment in whole
 
                                       35
<PAGE>   47
 
or in part in shares of Chemex Common Stock, based on the fair market value of
such Common Stock at the time of payment.
 
OPTION DOCUMENT; RESTRICTION ON TRANSFERABILITY
 
     All options will be evidenced by a written option document containing
provisions consistent with the 1995 Stock Option Plan and such other provisions
as the Committee deems appropriate. No option granted under the 1995 Option Plan
may be transferred, except by will, the laws of descent and distribution or
pursuant to a qualified domestic relations order, as defined by the Code or in
Title I of ERISA.
 
TAX ASPECTS OF THE 1995 STOCK OPTION PLAN
 
     The following discussion is intended to briefly summarize the general
principles of federal income tax law applicable to options granted under the
1995 Stock Option Plan. A recipient of an incentive stock option will not
recognize taxable income upon either the grant or exercise of an incentive stock
option. The option holder will recognize long-term capital gain or loss on a
disposition of the shares acquired upon exercise of an incentive stock option,
provided the option holder does not dispose of those shares within two years
from the date the incentive stock option was granted or within one year after
the shares were transferred to such option holder. Currently, for regular
federal income tax purposes, long-term capital gain is taxed at a maximum rate
of 28%, while ordinary income may be subject to an effective maximum rate of
39.6%. If the option holder satisfies both of the foregoing holding periods,
then Chemex will not be allowed a deduction by reason of the grant or exercise
of an incentive stock option.
 
     As a general rule, if the option holder disposes of the shares before
satisfying both holding period requirements (a "disqualifying disposition"), the
gain recognized by the option holder on the disqualifying disposition will be
taxed as ordinary income to the extent of the difference between (i) the lesser
of the fair market value of the shares on the date of exercise or the amount
received for the shares in the disqualifying disposition, and (ii) the adjusted
basis of the shares, and Chemex will be entitled to a deduction in that amount.
The gain (if any) in excess of the amount recognized as ordinary income on a
disqualifying disposition will be long-term or short-term capital gain,
depending on the length of time the option holder held the shares prior to the
disposition.
 
     The amount by which the fair market value of a share at the time of
exercise exceeds the option price will be included in the computation of such
option holder's "alternative minimum taxable income" in the year the option
holder exercises the incentive stock option. Currently, the maximum alternative
minimum tax rate for individuals is 28%. If an option holder pays alternative
minimum tax with respect to the exercise of an incentive stock option, then the
amount of such tax paid will be allowed as a credit against regular liability in
subsequent years. The option holder's basis in the shares for purposes of the
alternative minimum tax will be adjusted when income is included in alternative
minimum taxable income.
 
     A recipient of a non-qualified stock option will not recognize taxable
income at the time of grant, and Chemex will not be allowed a deduction by
reason of the grant. Such an option holder will recognize ordinary income in the
taxable year in which the option holder exercises the non-qualified stock
option, in an amount equal to the excess of the fair market value of the shares
received upon exercise, at the time of exercise of such options, over the
exercise price of the option, and Chemex will be allowed a deduction in that
amount. Upon disposition of the shares subject to the option, an option holder
will recognize long-term or short-term capital gain or loss, depending upon the
length of time the shares were held prior to disposition, equal to the
difference between the amount realized on disposition and the option holder's
basis in a share subject to the option (which basis ordinarily is the fair
market value of the shares subject to the option on the date the option was
exercised).
 
The Board of Directors of Chemex unanimously recommends a vote "FOR" the
approval of the establishment of the Plan.
 
                                       36
<PAGE>   48
 
               RATIFICATION OF SELECTION OF INDEPENDENT AUDITORS
 
     The Board of Directors of Chemex has selected KPMG Peat Marwick LLP to
audit Chemex's accounts for the fiscal year ending December 31, 1996. Such firm,
which has served as Chemex's independent auditor since 1983, has reported to
Chemex that none of its members has any direct financial interest or material
indirectly financial interest in Chemex.
 
     Unless instructed to the contrary, the persons named in the enclosed proxy
intend to vote the same in favor of the ratification of KPMG Peat Marwick LLP as
Chemex's independent auditors.
 
     A representative of KPMG Peat Marwick LLP is expected to attend the Special
Meeting and will be afforded the opportunity to make a statement and/or respond
to appropriate questions from stockholders.
 
                             ELECTION OF DIRECTORS
 
     Three directors are to be elected at the Special Meeting to serve for a
term of three years or until their respective successors are elected and
qualified or until earlier resignation or removal. If the Merger is consummated,
the directors of Chemex as the surviving corporation of the Merger will be as
set forth on the Certificate of Merger filed with the Secretary of State of the
State of Delaware. See "The Proposed Merger -- Effects of the Merger -- Officers
and Directors of the Surviving Corporation." Therefore, if the Merger is
consummated, Vernon Taylor III and Paul P. Woolard, nominees for election as
Class 1 directors, will not continue to serve as directors of Chemex as the
surviving corporation of the Merger after the Effective Time. In addition,
Sandford Smith and Charles Smith will not continue to serve as directors of
Chemex after the Effective Time.
 
     The Certificate of Incorporation and Bylaws of Chemex presently provide
that the Board of Directors of Chemex shall consist of three to fifteen members,
shall be divided into three classes as nearly equal in number as possible, and
that each director shall serve a term of three years and until her or his
successor has been elected and qualified or until her or his earlier resignation
or removal. By resolution, the Board has set the number of its directors at
nine. The term of office of one class of directors expires each year in rotation
so that one class is elected at each annual meeting for a three year term. The
terms of three Class 1 directors will expire at the Special Meeting.
 
     Chemex Stockholders have the right to vote cumulatively for the election of
Directors, this means that in the voting at the Special Meeting each
Stockholder, or his proxy, may multiply the number of his shares by three (the
number of directors to be elected) and then cast the resulting total number of
votes on the ballot among the nominees as desired. The proxies submitted to the
Board of Directors in response to this solicitation may, in the discretion of
the proxy holder, cumulate the votes of the shares they represent. However, the
Board of Directors requires any stockholder otherwise electing to exercise his
cumulative voting rights, if voting in person, to so indicate prior to the
beginning of the Special Meeting or, if voting by proxy given to someone other
than those designated by the Board of Directors in this solicitation, to so
indicate on said proxy.
 
   
     Pursuant to a Loan and Security Agreement, dated as of May 18, 1990,
between Chemex and Sentinel Charitable Remainder Trust, Chemex agreed that, upon
conversion by Sentinel of loans to Chemex into shares of Chemex Common Stock and
warrants for the purchase of additional shares of Chemex Common Stock, the Board
of Directors would either (i) appoint to the existing vacancies on the Board,
two nominees by Sentinel, (ii) nominate for election to the Board at any
subsequent annual meeting of stockholders (following notice to the Board of
Sentinel's intent to exercise this option) two nominees designated by Sentinel,
or (iii) in the event there are no existing vacancies on the Board at the time
Sentinel decides to exercise this right, expand the Board, pursuant to Chemex's
Bylaws, to include two additional directors to be designated by Sentinel and
appointed by the Board. Sentinel's right to designate nominees expires upon the
exercise of any one of the options set forth in (i), (ii) or (iii) above. To
date, Sentinel has forfeited one position on the Board and has not informed
management that it intends to nominate its remaining nominee at the Special
Meeting. As of December 14, 1995, by a Letter Agreement with Chemex (the "Letter
Agreement"), Sentinel agreed to forfeit its right to designate any nominees on
the Board. The Letter Agreement is subject to the condition that the Chemex
Stockholders approve the Merger Agreement. (See "Certain
Transactions -- Chemex").
    
 
                                       37
<PAGE>   49
 
INFORMATION CONCERNING NOMINEES (CLASS 1)
 
     The following table sets forth the positions and offices presently held
with Chemex by each nominee, her or his age, her or his tenure as a director and
the number of shares of Chemex Common Stock beneficially owned as of September
30, 1995.
 
<TABLE>
<CAPTION>
                                                                                    NUMBER OF
                                                POSITIONS AND OFFICES                 SHARES         APPROXIMATE
                                                   PRESENTLY HELD       DIRECTOR   BENEFICIALLY     PERCENTAGE OF
                  NAME                    AGE        WITH CHEMEX         SINCE       OWNED(1)         CLASS(1)
- ----------------------------------------  ---   ---------------------   --------   ------------     -------------
<S>                                       <C>   <C>                     <C>        <C>              <C>
Elizabeth M. Greetham...................  46    Director                  1992         21,067(2)           *
Vernon Taylor III.......................  48    Director                  1979        412,671(3)         3.1%
Paul P. Woolard.........................  71    Director                  1991         23,800(4)           *
</TABLE>
 
- ---------------
* Less than 1%.
 
(1) Includes shares issuable pursuant to currently exercisable options and
    warrants which will become exercisable within sixty days of September 30,
    1995. Except as otherwise indicated, the persons named herein have sole
    voting and dispositive power with respect to the shares beneficially owned.
 
(2) Including presently exercisable options for the purchase of 15,067 shares of
    common stock pursuant to the Non-Employee Director Plan.
 
(3) As of September 30, 1995, Mr. Taylor is the owner of record of 227,460
    shares and 1,500 shares owned of record by Mr. Taylor's minor son, over
    which he has sole voting and investment power. Also included are 61,047
    shares which Mr. Taylor has the present right to acquire under the 1987
    Plan, 77,664 shares issuable upon the exercise of warrants, and 30,000
    shares issuable upon the exercise of options to purchase 12,500 units
    consisting of one share of common stock, one warrant, and 4/10 of a warrant.
    Lastly, includes 15,000 exercisable options for the purchase of shares of
    common stock pursuant to Non-Employee Director Plan.
 
(4) Including presently exercisable options for the purchase of 13,400 shares of
    common stock pursuant to the Non-Employee Director Plan.
 
     Mr. Vernon Taylor III has served as a Director since 1979. From 1979 until
June 1989 he served as Chairman of the Board of Directors and Treasurer of the
Company; from 1979 until February 1989 he served as Chief Executive Officer of
the Company and from 1979 until July 1985 he served as President of the Company.
Mr. Taylor graduated from Stanford University with a B.S. in Mineral
Engineering. He presently serves as Vice Chairman of Breece Hill Technologies,
Inc. and is a member of the Board of Directors of Placer Dome, Inc.
 
     Mrs. Elizabeth M. Greetham is President of Libracorn Financial Consultants.
One of her present clients is Weiss, Peck & Greer, a New York-based money
management firm. With over twenty years of worldwide experience as a health care
analyst and portfolio manager, she currently is responsible for Weiss, Peck &
Greer's health care investments for institutional, mutual, and selected
individual accounts. Prior to her association with Weiss, Peck & Greer, Mrs.
Greetham consulted for a number of years for F. Eherstadt & Co., a New York
institutional brokerage house. She is a member of the Board of Directors of
Medco Research and Repligen Corporation, pharmaceutical development companies.
 
     Mr. Paul P. Woolard, now President of his own business consulting firm, had
a long association with Revlon. His positions there included President, Revlon
Cosmetics and Fragrances World-Wide, Senior Executive Vice President and member
of the Board of Directors, Revlon, Inc., and President, Revlon, USA. Mr. Woolard
serves on several Boards including that of the Lynch Corporation.
 
INFORMATION CONCERNING THE BOARD
 
     The Board of Directors of Chemex held six meetings during the year ended
December 31, 1994. All then incumbent directors, including the three nominees
attended at least 75% of such meetings, except Sandford D. Smith, who attended
four of the six meetings.
 
                                       38
<PAGE>   50
 
     Chemex does not have a nominating committee but does have an Audit &
Finance Committee comprised of Sandford D. Smith, J. Michael Flinn and Paul P.
Woolard. The members of the Audit & Finance Committee met one time 1994. Chemex
also had an Executive Committee during 1994 comprised of J. Michael Flinn,
Elizabeth M. Greetham, Herbert H. McDade, Jr. and Sandford D. Smith. The
Executive Committee did not meet during 1994.
 
REPORTING DELINQUENCIES
 
     Section 16(a) of the Exchange Act requires Chemex's officers and directors,
and persons who own more than 10% of the Chemex Common Stock, to file reports of
ownership and changes in ownership with the Commission. Officers, directors and
greater than 10% stockholders are required by the Commission to furnish Chemex
with copies of all Section 16(a) forms they file.
 
     Based solely on its review of the copies of such forms received by it, or
written representations from certain reporting persons that no Forms 5 were
required for such persons, Chemex believes that during the fiscal year ended
December 31, 1994, all filing requirements applicable to its officers, directors
and greater than 10% beneficial owners were complied with.
 
                                       39
<PAGE>   51
 
                       ADJOURNMENT OF THE SPECIAL MEETING
 
     The affirmative vote of the holders of a majority of the shares of the
Chemex Common Stock outstanding on the Record Date, represented in person or by
proxy, is required to approve and adopt the Merger Agreement, and to approve the
proposed amendments to the Certificate of Incorporation of Chemex. The
affirmative vote of the majority of the Chemex Common Stock represented in
person or by proxy is necessary for approval of the 1995 Stock Option Plan, the
election of each nominee for director and the ratification of the 1995 Stock
Option Plan. In the event that there do not appear to be sufficient votes to
approve these matters at the time of the Special Meeting, such proposals could
not be approved unless the Special Meeting were adjourned in order to permit
further solicitation of proxies. In order to allow proxies that have been
received by Chemex at the time of the Special Meeting to be voted for
adjournment, if necessary, Chemex has submitted the question of adjournment (the
"Adjournment") under such circumstances to its stockholders as a separate matter
for their consideration. A majority of the shares of Chemex Common Stock
represented and voting at the Special Meeting is required to approve the
Adjournment.
 
     The Board of Directors of Chemex recommends that stockholders vote their
proxies in favor of the Adjournment in such circumstances so that their proxies
may be used for such purpose in the event it should become necessary. Pursuant
to Chemex's Bylaws, if it is necessary to adjourn the Special Meeting and the
Adjournment is for a period of less than 30 days, no notice of the hour, date
and place of the adjourned meeting is required to be given to stockholders other
than an announcement of such hour, date and place at the Special Meeting.
 
     The Board of Directors of Chemex recommends that you vote "FOR" the
proposal to adjourn the Chemex Special Meeting, if necessary, to permit further
solicitation of proxies as described herein.
 
                                       40
<PAGE>   52
 
                     DESCRIPTION OF CHEMEX'S CAPITAL STOCK
 
   
     Under Chemex's Certificate of Incorporation, as amended, Chemex is
authorized to issue up to 20,000,000 shares of Chemex Common Stock, and
5,000,000 shares of Chemex Preferred Stock. As of the Record Date, there were
8,737,788 shares of Chemex Common Stock issued and outstanding and entitled to
vote at the Special Meeting, and no shares of Chemex Preferred Stock issued and
outstanding. See "Amendment of the Chemex Certificate of Incorporation" for a
description of the proposal to increase the number of authorized shares of
Chemex Preferred Stock and Chemex Common Stock.
    
 
COMMON STOCK
 
     The holders of Chemex Common Stock are entitled to one vote for each share
of such stock held of record by them, and may cumulate their votes for the
election of directors. The holders of Chemex Common Stock are entitled to
receive dividends when, as and if declared by the Board of Directors out of
funds legally available therefor, subject to the prior rights of the holders of
outstanding Chemex Preferred Stock are entitled of which there is none
outstanding. Upon the liquidation or dissolution of Chemex, holders of Chemex
Common Stock are entitled to receive all assets available for distribution to
stockholders, after payment of creditors and preferential liquidation
distributions to preferred stockholders. The Chemex Common Stock has no
preemptive or other subscription rights or redemption or sinking fund provisions
with respect to such shares. All outstanding shares of Chemex Common Stock are,
and the shares included in this offering will be when issued, fully paid and
non-assessable.
 
PREFERRED STOCK
 
     The Board of Directors of Chemex is authorized, subject to any limitations
prescribed by law, without further stockholder approval, to issue from time to
time up to an aggregate of 5,000,000 shares of Chemex Preferred Stock in one or
more series. Each such series of Chemex Preferred Stock shall have such number
of shares, designations, preferences, voting powers, qualifications and special
or relative rights or privileges, which may include, among others, dividend
rights, voting rights, redemption and sinking fund provisions, liquidation
preferences and conversion rights, as shall be determined by the Board of
Directors in a resolution or resolutions providing for the issuance of such
series. Any such series of Chemex Preferred Stock, if so determined by the Board
of Directors, may have full voting rights with the Chemex Common Stock or
superior or limited voting rights, and may be convertible into Chemex Common
Stock or another security of Chemex.
 
     Chemex has granted to the Board of Directors the authority to issue Chemex
Preferred Stock and to determine its rights and preferences in order to
eliminate delays associated with a stockholder vote on specific issuances. The
issuance of Chemex Preferred Stock, while providing desirable flexibility in
connection with possible acquisitions and other corporate purposes, could have
the effect of making it more difficult for a third party to acquire, or of
discouraging a third party from acquiring, a majority of the outstanding voting
stock of Chemex. Chemex has no present plans to issue any shares of Chemex
Preferred Stock. See "Risk Factors -- Effect of Certain Charter and Bylaw
Provisions."
 
DELAWARE LAW AND CERTAIN CHARTER AND BY-LAW PROVISIONS
 
     Certain anti-takeover provisions.  Chemex is subject to the provisions of
Section 203 of the General Corporation Law of Delaware. Section 203 prohibits
certain publicly held Delaware corporations from engaging in a "business
combination" with an "interested stockholder" for a period of three years after
the date of the transaction in which the person became an "interested
stockholder," unless the business combination is approved in a prescribed
manner. A "business combination" includes mergers, asset sales and other
transactions resulting in a financial benefit to the interested stockholder.
Subject to certain exceptions, an "interested stockholder" is a person or entity
who, together with affiliates and associates, owns (or within the preceding
three years, did own) 15% or more of the corporation's voting stock. The statute
contains provisions enabling a corporation to avoid the statute's restrictions
if the stockholders holding a majority of the corporation's voting stock approve
an amendment to the corporation's Certificate of Incorporation or Bylaws.
 
                                       41
<PAGE>   53
 
     The Certificate of Incorporation of Chemex provides that the directors of
the corporation shall be divided into three classes, with the terms of each
class to expire on different years.
 
     In addition, the Certificate of Incorporation of Chemex, in order to combat
"greenmail," provides in general that any direct or indirect purchase by Chemex
of any of its voting stock (or rights to acquire voting stock) known to be
beneficially owned by any person or group which holds more than five percent of
a class of its voting stock and which has owned the securities being purchased
for less than two years must be approved by the affirmative vote of at least
two-thirds of the votes entitled to be cast by the holders of voting stock,
subject to certain exceptions. The prohibition of "greenmail" may tend to
discourage or foreclose certain acquisitions of Chemex's securities which might
temporarily increase the price of Chemex's securities. Discouraging the
acquisition of a large block of Chemex's securities by an outside party may also
have a potential negative effect on takeovers. Parties seeking control of Chemex
through large acquisitions of its securities will not be able to resort to
"greenmail" should their bid fail, thus making such a bid less attractive to
persons seeking to initiate a takeover effort.
 
ELIMINATION OF MONETARY LIABILITY FOR OFFICERS AND DIRECTORS.
 
     Chemex's Certificate of Incorporation incorporates certain provisions
permitted under the General Corporation Law of Delaware relating to the
liability of Directors. The provisions eliminate a Director's liability for
monetary damages for a breach of fiduciary duty, including gross negligence,
except in circumstances involving certain wrongful acts, such as the breach of a
Director's duty of loyalty or acts or omissions which involve intentional
misconduct or a knowing violation of law. These provisions do not eliminate a
Director's duty of care. Moreover, the provisions do not apply to claims against
a Director for violations of certain laws, including federal securities laws.
Chemex's Certificate of Incorporation also contains provisions to indemnify the
Directors, officers, employees or other agents to the fullest extent permitted
by the General Corporation Law of Delaware. The Company believes that these
provisions will assist Chemex in attracting and retaining qualified individuals
to serve as Directors.
 
INDEMNIFICATION OF OFFICERS AND DIRECTORS.
 
     Chemex's Certificate of Incorporation also contains provisions to indemnify
the Directors, officers, employees or other agents to the fullest extent
permitted by the General Corporation Law of Delaware. These provisions may have
the practical effect in certain cases of eliminating the ability of shareholders
to collect monetary damages from directors. Chemex believes that these
provisions will assist Chemex in attracting or retaining qualified individuals
to serve as Directors.
 
DESCRIPTION OF UNITS
 
   
     Chemex has authorized the issuance of up to 500,000 units, consisting, in
the aggregate of 500,000 shares of Chemex Common Stock and Warrants exercisable
in the aggregate for 700,000 shares of Chemex Common Stock. The authorization of
the Units was made in connection with that certain Conversion Agreement, dated
June 18, 1990, by and between Chemex and Sentinel Charitable Remainder Trust
(the "Conversion Agreement"). (See "Security Ownership of Certain Beneficial
Owners and Management -- Chemex." for a discussion of Sentinel Charitable
Remainder Trust's beneficial ownership in Chemex.) Pursuant to the terms of the
Conversion Agreement, each Unit has an exercise price of $2.50 and the right of
Sentinel Charitable Remainder Trust to subscribe for the Units expires on July
31, 1996. This Conversion Agreement was amended as of December 14, 1995 by the
Letter Agreement to provide that the right of Sentinel Charitable Remainder
Trust to subscribe for the Units expires on January 1, 1999. The Letter
Agreement is subject to the condition that the Chemex Stockholders approve the
Merger Agreement. (See "Certain Transactions -- Chemex."
    
 
DESCRIPTION OF WARRANTS
 
     Each Warrant issuable in connection with the Units described above is
exercisable for 1 share of Chemex Common Stock (subject to adjustment as
provided in the warrant), with 500,000 of the Warrants exercisable
 
                                       42
<PAGE>   54
 
   
at $6.25 and the remaining 200,000 Warrants exercisable at $2.50, all upon the
terms and conditions set forth in the Conversion Agreement. The Warrants expire
on July 31, 1997; provided, however, that if the Chemex Stockholders approve the
Merger Agreement, the amendment to the Conversion Agreement by the Letter
Agreement will result in a change in the expiration date of the Warrants to
January 1, 2000.
    
 
     The terms of the Warrant certificates provide that Chemex will, whenever
appropriate, take such actions as may be necessary to provide for the issuance
to holders of Warrants, upon exercise of the Warrants, the kind and amount of
shares of Common Stock, or other securities or property (adjusted to reflect any
subsequent exchange, replacement, subdivision or combination thereof) which the
holder would have received upon exercise of the Warrants immediately prior to
any amendment of Chemex's Certificate of Incorporation, reclassification of its
shares, consolidation, merger, dissolution or sale of its assets. No holder of
Warrants, as such, shall be entitled to vote or receive dividends or be deemed
the holder of shares of Common Stock for any purpose or give or withhold consent
to any action by Chemex until the holder's Warrants shall have been exercised
and the shares of Chemex Common Stock purchasable upon such exercise shall have
become deliverable as provided in the Warrant Agreement and the holder shall be
registered as the owner of the shares of Common Stock on the records of Chemex
or its transfer agent.
 
     Chemex shall at all times reserve and keep available out of its authorized
Common Stock the full number of shares of Common Stock and the full number of
shares of any other class of securities of Chemex deliverable upon the exercise
of all outstanding Warrants.
 
TRANSFER AGENT AND REGISTRAR
 
     The Transfer Agent and Registrar for the Common Stock of the Company is
American Stock Transfer & Trust Company.
 
                                       43
<PAGE>   55
 
            PER SHARE PRICES OF AND DIVIDENDS ON CHEMEX COMMON STOCK
 
     During the time periods shown on the table below, Chemex's Common Stock was
traded on the National Association of Securities Dealers, Inc. Automated
Quotation System ("Nasdaq") SmallCap market under the trading symbol CHMX until
April 27, 1995. Chemex's securities were delisted from the Nasdaq SmallCap
Market on April 27, 1995 for failure to meet certain financial requirements.
Chemex Common Stock now trades on Nasdaq Over-the-Counter ("OTC") Bulletin
Board. The following tables set forth the high and low closing bid prices for
Chemex's Common Stock for the periods indicated as reported by Nasdaq.
 
   
<TABLE>
<CAPTION>
                                                                           COMMON STOCK
                                                                         -----------------
                                                                          HIGH       LOW
                                                                         ------     ------
    <S>                                                                  <C>        <C>
    FISCAL YEAR ENDED DECEMBER 31, 1993
    First quarter......................................................  2 1/2      3/8
    Second quarter.....................................................  2 3/4      1 7/8
    Third quarter......................................................  2 3/16     1 1/4
    Fourth quarter.....................................................  1 3/4      1 1/8
    FISCAL YEAR ENDED DECEMBER 31, 1994
    First quarter......................................................  1 13/16    1/16
    Second quarter.....................................................  13/16      1/8
    Third quarter......................................................  1          9/16
    Fourth quarter.....................................................  11/16      7/16
    FISCAL YEAR ENDED DECEMBER 31, 1995
    First quarter......................................................  3/4        7/16
    Second quarter (through April 27, 1995 on Nasdaq SmallCap
      Market)..........................................................  1/2        7/16
    Second quarter (after April 27, 1995 on OTC Bulletin Board)........  .5625      .0625
    Third quarter......................................................  .59375     .28125
    Fourth quarter (through December 13, 1995).........................  .84375     .09375
</TABLE>
    
 
     The number of record holders of Chemex's Common Stock at October 31, 1995
was approximately 3,000.
 
     Chemex has never paid any cash dividends on its Chemex Preferred Stock or
Common Stock. The payment of dividends, if any, in the future is within the
discretion of the Board of Directors and will depend upon Chemex's earnings, its
capital requirements and financial condition, and other relevant facts. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations of Chemex."
 
                                       44
<PAGE>   56
 
                       SELECTED FINANCIAL DATA OF CHEMEX
 
     The following data, insofar as it relates to each of the years in the five
year period ended December 31, 1994, has been derived from the audited financial
statements of Chemex and notes thereto appearing elsewhere herein. The data for
the nine-month periods ended September 30, 1995 and September 30, 1994 have been
derived from unaudited financial statements also appearing herein and which, in
the opinion of management, include all adjustments (consisting only of normal
recurring adjustments) necessary for a fair statement of the financial position
and results for the unaudited interim periods presented. The operating results
for the interim periods are not necessarily indicative of results for any future
period. The report of KPMG Peat Marwick LLP which also appears herein contains
an explanatory paragraph which states that there is substantial doubt about the
ability of Chemex to continue as a going concern.
 
<TABLE>
<CAPTION>
                                           FOR THE
                                         NINE MONTHS
                                            ENDED                          FOR THE
                                        SEPTEMBER 30,              YEAR ENDED DECEMBER 31,
                                       ---------------   --------------------------------------------
                                        1995     1994     1994     1993      1992     1991     1990
                                       ------   ------   ------   -------   ------   ------   -------
                                            (THOUSANDS, EXCEPT FOR NET INCOME (LOSS) PER SHARE)
<S>                                    <C>      <C>      <C>      <C>       <C>      <C>      <C>
INCOME STATEMENT DATA:
  Total Revenues.....................  $2,885   $2,901   $3,162   $ 1,656   $9,046   $3,103   $ 2,199
  Total Expenses.....................   2,022    3,145    4,121     5,223    4,361    3,783     4,622
  Net Income (Loss)..................     863     (244)    (959)   (3,567)   4,254     (680)   (2,423)
                                       -------  ------   ------   -------   ------   ------   -------
COMMON STOCK DATA(1):
  Net Income (Loss) Per Share........  $  .10   $ (.03)  $ (.11)  $  (.43)  $  .48   $ (.08)  $  (.32)
  Average Number of Common Shares and
     Common Equivalent Shares
     Outstanding.....................   8,713    8,542    8,543     8,385    8,843    8,107     7,360
                                       =======  ======   ======   =======   ======   ======   =======
</TABLE>
 
- ---------------
(1) Restated to reflect a one for four reverse stock split and 100% stock
    dividend in 1992.
 
<TABLE>
<CAPTION>
                                                                           DECEMBER 31,
                                            SEPTEMBER 30,   ------------------------------------------
                                                1995         1994     1993     1992     1991     1990
                                            -------------   ------   ------   ------   ------   ------
<S>                                         <C>             <C>      <C>      <C>      <C>      <C>
BALANCE SHEET DATA:
Total Assets..............................     $ 2,417      $1,704   $3,016   $6,535   $1,676   $1,475
Total Liabilities.........................         209         377      986    1,010      890      731
Stockholders' Equity......................       2,208       1,327    2,030    5,525      786      744
                                                  ====      ======   ======   ======   ======   ======
</TABLE>
 
                                       45
<PAGE>   57
 
                               BUSINESS OF CHEMEX
 
     Chemex was founded in 1974 as Chemex Corporation, a Wyoming corporation,
and in 1983 changed its name to Chemex Pharmaceuticals, Inc. Chemex changed its
state of incorporation from Wyoming to Delaware on June 30, 1989.
 
     Chemex's principal executive office is at 660 White Plains Road, Suite 400,
Tarrytown, New York 10591; its telephone number is (914) 332-8633.
 
     Until July 1995 and the sale of Amlexanox to Block, Chemex focused on the
development of novel drugs for the treatment of various skin diseases and had a
diversified portfolio of drugs under development.
 
     In June 1990, Chemex sold its lead drug, Actinex(R), a drug developed by
Chemex for the treatment of actinic keratoses (pre-malignant lesions of the
skin) to Block for a total of $8 million in milestone payments plus future
royalties which to date have not been significant. As of December 31, 1992, all
milestones were achieved and paid, and Block began selling the drug in November
1992. Chemex has retained the right to the active ingredient of Actinex for all
applications other than the indications for premalignant lesions of the skin and
basal cell carcinoma.
 
     In June 1991, Chemex entered into a Joint Venture Agreement with Block for
the development, manufacture and marketing of certain dermatological products
(the "Joint Venture"). Under the terms of the agreement, Block paid $2 million
to Chemex for certain proprietary rights of Chemex. Chemex was responsible for
the research and development of any Joint Venture products and Block was
responsible for manufacturing and marketing of Joint Venture products. The Joint
Venture contemplated research and development expenses of up to $17 million
during the five years of the agreement. The first $3 million of research was
paid by Block; the remaining expenses were shared equally by both parties. Block
reached the initial $3 million of funding in December 1992, and Chemex began
contributions of its share of research and development expenses at that time.
Through December 31, 1994, the Joint Venture had spent cumulatively $8,884,000
on various drugs in development.
 
     Effective December 31, 1994, Block and Chemex mutually agreed to dissolve
the Joint Venture. Block and Chemex concluded several agreements as part of the
Joint Venture dissolution: (1) Asset Distribution Agreement ("ADA") which
effectively dissolved the Joint Venture and specified the distribution of Assets
of the Joint Venture; (2) Product Development Agreement ("PDA") and
Manufacturing, Marketing and Distribution Agreement ("MMS") which established
the joint ownership of Amlexanox and the responsibilities of each party; and (3)
a separate agreement (the "Chemex Option") which gave Chemex the option to
transfer its share of the ownership rights to Amlexanox to Block for a
non-refundable up front payment plus future royalties.
 
     Following the dissolution of the Joint Venture, Chemex jointly owned the
rights to Amlexanox with Block. Pursuant to the PDA and MMS agreements with
Block, Chemex was required to share certain research and development and other
expenses relating to the commercialization of Amlexanox on a 50/50 basis with
Block. These agreements also provided that if Chemex was unable to fund its
shares of such expenses, Chemex was only be entitled to receive royalties from
future sales of Amlexanox.
 
     Believing that it would not be able to continue to fund its share of the
expenses required for commercialization of Amlexanox and because it was unable
to (a) raise additional equity financing and (b) reach agreement, by letter of
intent or otherwise, on a merger transaction with a third party, Chemex, on May
30, 1995, exercised the option to sell its rights to Amlexanox to Block. On
September 14, 1995, at a Special Meeting of Stockholders, the Chemex
Stockholders approved such sale and such transaction was consummated on
September 21, 1995.
 
     As consideration for the sale of Chemex's share of Amlexanox, Block (a)
made an initial upfront royalty payment of $2.5 million; (b) is obligated to pay
to Chemex $1.5 million as a prepaid royalty at the end of the calendar month
during which Block together with any sublicensee has achieved cumulative
worldwide sales of
 
                                       46
<PAGE>   58
 
Amlexanox oral products of $25 million; and (c) after the payment of such $1.5
million royalty, is obligated to pay to Chemex for all sales in excess of
cumulative worldwide sales of Amlexanox oral products of $45 million:
 
          (1) for all countries where a valid and enforceable patent or Takeda
     Chemical Industries, Ltd., the licensor of Amlexanox to Block and Chemex
     ("Takeda") or Amlexanox patent for canker sores is in effect at the time of
     sale:
 
           Ethical formulations: 5%
 
           Over the Counter ("OTC") formulations: 2.5%
 
          (2) for countries where there is no valid and enforceable Takeda
     patent or Amlexanox patent for canker sores in effect at the time of a
     sale:
 
           Ethical formulations: 2.5%
 
           OTC formulations: 1.25%
 
     Following consummation of the sale of Amlexanox to Block, Chemex's
obligations under the PDA and MMS agreements ceased. Chemex's obligations
following such sale are limited to performing reasonable activities in support
of obtaining FDA approval of Amlexanox until the earlier of (i) three years
after FDA approval of Amlexanox, or (ii) the liquidation or dissolution of
Chemex.
 
     Since the sale, Chemex has used the proceeds from the sale to fund limited
operations while seeking a merger partner. As of July 31, 1995 Chemex's research
and development operations ceased.
 
     Chemex's research strategy was to in-license existing drugs which are being
developed for nondermatological medical indications for application to
dermatology. This strategy enabled Chemex to bypass much of the drug discovery
phase and preclinical research which reduces both time and cost to develop a new
drug. In addition, this strategy generally enabled Chemex to obtain and use
safety data from the licensor which also reduced the risk in the development of
a new drug compound. Chemex's most recent product portfolio consists of six
compounds (one of which is an option to license and on hold) at various stages
of development. Five of the six drugs are targeted for topical and/or
dermatology indications, and the remaining one is targeted for anti-tumor
activity. The drugs in the portfolio have either been developed by Chemex or
licensed for the field of dermatology from pharmaceutical companies. With the
exception of Actinex(R) and Amlexanox, the rights to all the dermatology drugs
are owned by Chemex. Actinex(R) was sold to Block in June 1990 for the
indication of actinic keratoses and basal cell carcinoma. All of Chemex's rights
to Amlexanox were sold to Block in September 1995.
 
     Chemex currently has rights to three drugs in various stages of human
clinical development covering medical indications for the following disease
states: contact dermatitis, mild to moderate psoriasis, and photoaging of the
skin (anti-wrinkling). Chemex also has an option to license Hypericin from VimRx
Pharmaceuticals, Inc. for dermatological use. In addition, Chemex's proprietary
drug, Masoprocol, was in preclinical studies to determine the extent of its
potential in treating, in combination with other chemotherapeutic agents,
multiple-drug resistant cancers.
 
                                       47
<PAGE>   59
 
                             CHEMEX DRUG PORTFOLIO
 
<TABLE>
<CAPTION>
      COMPOUND         ORIGINATOR          INDICATION            FDA FILING       CLINICAL STATE(1)
- ---------------------  -----------  -------------------------  ---------------  ---------------------
<S>                    <C>          <C>                        <C>              <C>
ROYALTY
Actinex(2)...........  Chemex       Actinic keratoses          FDA approved     Completed
Amlexanox(2).........  Takeda       Oral ulcers                IND filed 1990   NDA filed April 1995
(CHX-3673)
CHEMEX PROPRIETARY
CHX-108..............  Chemex       Psoriasis                  IND filed 1987   Phase I/II
CHX-100(3)...........  Chemex       Prevention of photoaging   IND filed 1993   Phase II
                                    of skin
Masoprocol(3)........  Chemex       Anti-tumor (Cancer)        Development      Preclinical
Hypericin(4).........  VimRx        Psoriasis                  VimRx IND        Phase I
</TABLE>
 
- ---------------
(1) See "Government Regulations" for description of clinical stages. As of July
    31, 1995 all clinical tests and research and development operations of
    Chemex were discontinued.
 
(2) Sold to Block Drug.
 
(3) Involves the use of NDGA and may be developed by Chemex pursuant to the
    royalty-free, worldwide, exclusive license from Block to Chemex.
 
(4) Option to license compound for dermatological use from VimRx
    Pharmaceuticals.
 
GOVERNMENT REGULATIONS
 
     All compounds owned by Chemex make therapeutic claims and therefore are
classified as new drugs by the FDA and its equivalents in overseas markets. The
steps required before a pharmaceutical product may be produced and marketed in
the U.S. include preclinical tests, the filing of an IND with the FDA, which
must become effective pursuant to FDA regulations before human clinical trials
may commence and FDA approval of an NDA prior to commercial sale.
 
     Preclinical tests are conducted in the laboratory, usually involving
animals, to evaluate the safety and efficacy of the potential product. The
results of preclinical tests are submitted as part of an IND application and are
fully reviewed by the FDA prior to granting the sponsor permission to commence
clinical trials in humans. Clinical trials typically involve a three-phase
process. Phase I, the initial clinical evaluations, consists of administering
the drug and testing for safety and tolerated dosages as well as preliminary
evidence of efficacy in humans. Phase II involves a study to evaluate the
effectiveness of the drug for a particular indication and to determine optimal
dosage and dose interval and to identify possible adverse side effects and risks
in a larger patient group. When a product is found effective in Phase II, it is
then evaluated in Phase III clinical trials. Phase III trials consist of
expanded multi-location testing for efficacy and safety to evaluate the overall
benefit-to-risk index of the investigational drug in relationship to the disease
treated. The results of preclinical and human clinical testing are submitted to
the FDA in the form of an NDA for approval to commence commercial sales.
 
     The process of doing the requisite testing, data collection, analysis and
compilation of an IND and an NDA is costly and may take a protracted time
period, particularly if tests must be re-done or new tests instituted to comply
with FDA requests. Review by the FDA may also take a considerable time period
and there is no guarantee an NDA will be approved.
 
     Current U.S. government revisions to the U.S. healthcare system are not yet
known in detail, but could have an impact on the pharmaceutical industry,
possibly in the form of pricing restrictions.
 
PROPERTIES
 
     Effective as of November 1, 1995, Chemex's lease agreement for its
principal office of approximately 7,650 square feet, was terminated pursuant to
a settlement agreement with DAL Associates, its landlord at such location. In
connection with such termination, Chemex paid approximately $79,000 to DAL
Associates.
 
                                       48
<PAGE>   60
 
In addition, Chemex had leased 1,000 square feet of laboratory space on a month
to month basis from Block in Jersey City, New Jersey. This lease was canceled as
of February 28, 1995 as a result of a decision to close down laboratory
operations due to the lack of nearterm workload. Chemex currently leases
approximately 300 square feet of temporary office space at 660 White Plains
Road, Suite 400, Tarrytown, New York 10591 pending consummation of the Merger.
Upon consummation of the Merger, operations and principal offices will be moved
to ACCESS' facilities in Dallas, Texas.
 
LEGAL MATTERS
 
     Chemex is not a party to any material litigation and is not aware of any
pending or threatened litigation against Chemex that could have a material
adverse effect upon Chemex.
 
                                       49
<PAGE>   61
 
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
           OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF CHEMEX
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Working capital as of September 30, 1995 was $2,186,000, an increase of
$929,000 as compared to the working capital as of December 31, 1994 of
$1,257,000. The increase in working capital was principally due to the sale of
Amlexanox rights to Block for $2,500,000 less the operating losses incurred to
date. Chemex received the $2,500,000 less advances previously made by Block of
$125,000 in June 1995 and $125,000 in July 1995, upon receiving Chemex
stockholder approval of the sale of Amlexonox in September 1995. Chemex has
ceased all research spending and intends to conserve cash in anticipation of the
Merger. Chemex was notified by Nasdaq on April 26, 1995 that its request for a
temporary exemption from certain continued listing financial requirements was
denied. Chemex has been de-listed from the Nasdaq Small-Cap Market and the
Chemex Common Stock now trades on the OTC Bulletin Board under the sale stock
symbol "CHMX." Chemex's appeal to Nasdaq's decision was denied on July 31, 1995.
 
RESULTS OF OPERATIONS
 
  Comparison of Nine Months Ended September 30, 1995 and 1994
 
     Net Revenues for the nine months ended September 30, 1995 were $2,885,000,
$16,000 lower than the 1994 comparable period. The change in revenues from year
to year is explained as follows: the one-time non-refundable receipt of upfront
royalties in 1995 for the sale of Amlexanox rights by Chemex to Block of
$2,500,000; offset by the one time sale of 10% of a Joint Venture between Chemex
and Block in the amount of $1,700,000 in June 1994; and the reduction from 1994
to 1995 of joint venture project research revenues of $775,000 principally due
to the termination of the Chemex/Block Joint Venture in December 1994 which
effectively reduced research reimbursement (of 50%) of a majority of Chemex
development projects (with the exception of Amlexanox which was funded 50/50
until the sale of Amlexanox rights by Chemex to Block in September 1995).
 
     Research and development expenses were $1,131,000 for the nine months ended
September 30, 1995 as compared to $2,077,000 for the same period in 1994. The
reduction of overall research and development spending in 1995 from 1994 of
$946,000 was principally due to the completion of Phase III clinical trials in
the third quarter of 1994 for Amlexanox which was the most expensive phase in
the development of the drug. Chemex terminated all other research and
development during the third quarter of 1995 in anticipation of the proposed
Merger.
 
     Effective July 1, 1995, operating expenses were reduced to a minimum in
contemplation of the Merger. Chemex intends to preserve its cash in anticipation
of stockholder approval of the Merger Agreement and the consummation of the
Merger. General and administrative expenses were $885,000 in 1995, a reduction
of $172,000 as compared to the prior year. The reduction in spending may be
summarized as follows: the elimination of litigation fees which were incurred in
1994- $131,000; lower compensation expenses due to a voluntary salary reduction
of the CEO/Chairman and elimination of positions- $94,000; the elimination of
investment banking fees incurred in 1994- $92,000; the elimination of product
liability insurance in 1995-$15,000; partially offset by higher legal fees due
to the termination agreement for the Joint Venture and the agreement to sell the
rights to Amlexanox to Block- $102,000; and the settlement as to the termination
of the New Jersey lease- $79,000.
 
     Related party expenses were $6,000 for the nine months ended September 30,
1995, a reduction of $5,000 from the prior year.
 
     Accordingly, total expenses were $2,022,000 for the year to date 1995, a
reduction of $1,123,000 from 1994.
 
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<PAGE>   62
 
  Comparison of Years ended December 31, 1994 and 1993
 
     In June 1994, Chemex sold 20% of its share of the Joint Venture (or 10% of
the total Joint Venture) to Block for $1,700,000. Effective December 31, 1994,
Chemex re-acquired its 10% ownership of the Joint Venture from Block in return
for giving certain proprietary rights to Amlexanox to Block. The effect of the
December transactions was to allow Chemex to retain the $1.7 million it had
received in June 1994. The Joint Venture was then dissolved. The dissolution of
the Joint Venture established the transfer of the following ownership rights:
Chemex returned its rights to Penederm's retinoic acid product (Acticin) to
Block, which had been sublicensed to the Joint Venture by Block; Block returned
its share of the ownership of the balance of the dermatology drug portfolio to
Chemex (CHX-100, CHX-108, and EPC-K1); and Block and Chemex entered into a joint
ownership arrangement for Amlexanox. Accordingly, total 1994 revenues were
$3,162,000, an increase of $1,506,000 over 1993. Partially offsetting the one
time sale of rights for $1,700,000 was the following: a net reduction in Joint
Venture billing principally due to projects canceled in 1994 as compared to
1993 -- a reduction of $97,000; lower interest income due to an average lower
level of cash on hand -- $74,000; and lower royalty income for Actinex due to
disappointing sales results by Block -- $23,000.
 
     Total research and development expenses were $2,591,000 for 1994, a
reduction of $315,000 as compared to fiscal 1993. The reduction of spending was
in part due to lower spending associated with Joint Venture projects (down
$233,000) which is due to a net change in spending by project as follows:
Amlexanox -- up $234,000 due to completion of Phase III studies; EPC-K1 -- down
$29,000 as the program was delayed to due the decision by the FDA that the
compound could not be studied in adolescents as planned; PAF Antagonist -- down
$210,000 due to the discontinuance of the project in late 1993;
CHX-100 -- increase of $224,000 due to the commencement of studies in
photoaging; and Zinc/Durascreen -- down $278,000 due to the cancellation of
these projects. Projects outside the Joint Venture totaled $153,000 in 1994 a
reduction of $171,000 as compared to 1993. The decrease is principally due to
the cancellation of Cytarabine which had been studied as a treatment for genital
warts which was discontinued in late 1993.
 
     General and administrative operating expenses were $1,381,000 in 1994, a
reduction of $514,000 as compared to 1993. The reduction was due to a number of
cost reduction activities implemented in late 1993 which positively impacted
1994. A summary of the principal expense reductions are as follows: lower
compensation of $144,000 chiefly due to a reduction in the Chief Executive
Officers' salary of $42,000 and the elimination of bonuses paid to executive
officers of $92,000; the elimination of the use of public relations firm and the
elimination of developing a formal annual reportsavings of $118,000; and the
elimination of litigation legal fees resulting from the settlement of a lawsuit
against one current director (also a former officer) and two former
directors/officers -- savings of $194,000; and a reduction in other outside
legal fees -- $46,000.
 
     Related party professional fees decreased from $108,000 in 1993 to $27,000,
and in 1994 a further reduction of $81,000. The reduction was principally due to
legal fees to a former directors' law firm, which firm's services were
terminated in July 1993.
 
     Amortization of stock awards was an expense in 1994 of $122,000, and
represented the difference in the fair market value of Chemex's common stock as
of the date of grants of SARs which were issued in 1994 at zero value. SARs were
issued to employees who were not corporate officers in lieu of a cash bonus, and
to corporate officers which are to vest based on certain performance criteria.
For financial statement purposes, the excess of the market value over the zero
exercise price was expensed in 1994. In 1993, amortization of stock awards was a
credit of $161,000, which reflected the difference between the stock price of
the common stock on the date that certain SARs were exercised and the market
value of the SARs as originally expensed.
 
     In March 1994, Chemex contributed $475,000 to the final settlement of a
lawsuit against one current director and two former officers/directors of
Chemex. This amount had been accrued in fiscal 1993.
 
     Total expenses were $4,121,000 for fiscal 1994, as compared to $5,223,000
in 1993, a reduction of $1,102,000. The net loss in 1994 was $959,000 or a
reduction in loss of $2,608,000 from 1993. The reduction in net loss for 1994 as
compared to 1993 was principally due to the sale of proprietary rights to Block
for $1,700,000; the reduction of certain litigation expenses of $475,000; and
the net effect of general cost reductions.
 
                                       51
<PAGE>   63
 
     Consequently, the net loss for 1994 was $959,000, or $.11 loss per common
share, as compared to a net loss of $3,567,000, or $.43 loss per common share in
1993.
 
  Comparison of Years ended December 31, 1993 and 1992
 
     Total 1993 revenues were $1,656,000, a $7,390,000 decrease from 1992. The
decrease in revenues from 1992 was primarily a result of several one time
revenues achieved in 1992, as follows: $6 million of milestone payments received
in 1992 for achieving the FDA approval of Actinex; a decrease in reimbursement
of Joint Venture expenses in 1993 as 1992 had the benefit of virtually all Joint
Venture expenses paid by Block -- ($783,000), one time sale of NDGA to Block,
the active ingredient of Actinex ($408,000), and reimbursement from Block of
certain developmental expenses related to Actinex -- ($264,000).
 
     Total research and development expenses increased from $2,656,000 in 1992
to $2,906,000 in 1993, a 9.4% increase. The increase in spending was due to
higher Joint Venture research expenses of $477,000, partially offset by the
non-recurring research expenses related to Actinex (down by $265,000). Joint
Venture spending totaled $2,582,000 in 1993, of which Amlexanox was $1,580,000
or 62% of the total spending. Amlexanox was the most advanced product in the
Joint Venture portfolio in 1993. Spending for all other projects in the Joint
Venture were significantly lower as these projects were earlier in the FDA
process. Projects outside the Joint Venture totaled spending of $324,000, of
which $225,000 was related to Masoprocol anti-tumor research. During fiscal
1993, Chemex dropped two compounds being developed for psoriasis after initial
clinical trials proved to be inconclusive as to efficacy (Methotrezate and
TCV-309). In addition, Phase I clinical trials for Cyarabine, licensed from the
Upjohn Company, showed no clinical significance for the treatment of genital
warts and was dropped from the portfolio.
 
     General and administrative operating expenses were $1,895,000 in 1993, a
$411,000 increase over the 1992 comparable period. The primary reasons for the
increase is detailed as follows: increased litigation expenses related to a
lawsuit against former officers and directors in which Chemex was obligated to
indemnify -- $325,000; increased product liability insurance -- $40,000; higher
directors and officers insurance -- $38,000 and higher lease and related
costs -- $32,000.
 
     Related party professional fees decreased from $311,000 in 1992 to $108,000
in 1993, a reduction of $203,000. The reduction was due to the elimination of
consulting fees of $75,000, and the reduction in legal fees to a former
directors' law firm of $140,000.
 
     Amortization of stock awards were a credit to expenses of $161,000 in 1993,
as compared to a credit to expenses of $90,000 in 1992. The credit in 1993
reflected the difference between the stock price of the common stock on the date
certain SARs were exercised and the market value of the SARs as originally
expensed.
 
     In March 1994, Chemex agreed to contribute $475,000 to the settlement of a
lawsuit pending against one current director (who is also a former officer) and
two former officers/directors of Chemex. Since incurrence of this liability was
reasonably estimable and probable in 1993, Chemex accrued for this liability as
of December 31, 1993.
 
     Total expenses were $5,223,000 for 1993, as compared to $4,361,00 in 1992.
Losses before income taxes were $3,567,000 in 1993 as compared to profits before
income taxes in 1992 of $4,685,000. In summary, the reduction of earnings
between 1993 and 1992 of $8,257,000 was principally as follows: (1) reduction of
nonrecurring Actinex milestones -- $6,000,000; (2) elimination of one-time sale
and profit of Actinex raw material to Block -- $408,000; (3) elimination of
Block funding essentially all of 1992 Joint Venture research
expenses -- $1,125,000 which would have been Chemex's share; (4) 1993 settlement
costs of litigation -- $475,000; and (5) higher Joint Venture research spending
in 1993 (Chemex share) -- $250,000.
 
     As a result, net loss for 1993 was $3,567,000, or $.43 loss per common
share, as compared to a net income per common share and common share equivalents
of $.48 for 1992.
 
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<PAGE>   64
 
RECENT DEVELOPMENTS
 
     Pursuant to the terms of the Merger Agreement, Chemex is obligated to loan,
at any time prior to the Drop Dead Date, an aggregate amount of up to $250,000
to ACCESS, upon the request of ACCESS. On October 4, 1995, Chemex made a loan to
ACCESS of $100,000 which is evidenced by a Convertible Promissory Note,
convertible at Chemex's option upon a default under the Note into shares of
Series A Convertible Preferred Stock of ACCESS.
 
     Effective as of November 1, 1995, Chemex terminated its lease agreement
with DAL Associates for its principal office space at One Executive Drive, Fort
Lee, New Jersey, pursuant to a settlement agreement (the "Settlement
Agreement"). Pursuant to the Settlement Agreement Chemex paid to DAL Associates
approximately $79,000 in consideration of termination of the lease. Pending the
consummation of the Merger, Chemex has leased limited office space on a
temporary basis at 660 White Plains Road, Suite 400, Tarrytown, New York 10591.
 
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<PAGE>   65
 
                               BUSINESS OF ACCESS
 
INTRODUCTION
 
     ACCESS Pharmaceuticals, Inc. a Texas corporation, founded in 1988 is a
development stage company focused on the enhanced delivery of parenteral
therapeutic and diagnostic imaging agents through the utilization of its
patented and proprietary endothelial binding technology which selectively
targets sites of disease.
 
     ACCESS' principal executive office is at 2600 N. Stemmons Frwy., Suite 210,
Dallas, Texas 75207; its telephone number is (214) 905-5100.
 
     The ACCESS technology was researched and developed at the University of
Texas Southwestern Medical Center by Dr. David F. Ranney, ACCESS founder, who
was the Director of the Laboratory of Targeted Diagnosis and Therapy in the
departments of Pathology and Radiology. The technology is being developed to
increase the efficacy and reduce the side effects of therapeutics and diagnostic
agents by selectively targeting them to the sites of disease and accelerating
drug clearance. The principal form of the technology utilizes natural
carbohydrates, glycosaminoglycans ("GLYCOS") as the carrier system which
selectively targets sites of disease. GLYCOS work by recognizing and adhering to
cytokine-induced adhesive receptors on the walls of local blood vessels.
 
     The therapeutic focus of ACCESS is the development of proprietary
pharmaceuticals for the treatment of cancer and life-threatening infections and
the diagnosis and staging of cancer. ACCESS believes that the unique
pharmacologic profiles and selective targeting properties of GLYCOS could allow
its product candidates to become useful treatments for cancer and
life-threatening infections, and important diagnostic tools in the early
detection, prognosis and monitoring of cancer. The focus on acute care in large
expanding high-value hospital markets, particularly in the areas of oncology and
infectious disease, is designed to more rapidly accelerate development,
regulatory review and lower development cost in these life saving therapeutic
areas.
 
     ACCESS has developed four possible product candidates, two of which are
believed ready to be advanced into human testing. These product candidates are
new formulations of existing compounds which increase therapeutic efficacy and
reduce toxicity, designed to address the clinical shortfalls of available
treatments.
 
OVERVIEW OF OPERATIONS
 
     The ACCESS strategy is to initially focus on utilizing its GLYCOS
technology in combination with approved drug substances to develop novel
patentable physical formulations of potential therapeutic and diagnostic
products. It is anticipated that this will expedite product development, both
preclinical and clinical and ultimately product approval. To reduce financial
risk and equity financing requirements ACCESS is directing its resources to the
preclinical phase of development and plans to outlicense to or co-develop with
marketing partners the product candidates during the clinical development
phases.
 
     ACCESS has initiated and will continue to expand its internal core
capabilities of physical formulation, analytical methods development, initial
process scale up, carbohydrate analysis, drug/diagnostic targeting screens and
project management capability to maximize product opportunities in a timely
manner. The manufacturing scale-up, preclinical testing and product production
will be contracted to research organizations, contract manufacturers and
strategic partners. Given the current cost containment and managed care
environment both in the United States and overseas and the difficulty for a
small company to effectively market its products, ACCESS does not currently plan
to become a fully integrated company.
 
     Consequently, ACCESS expects to form strategic alliances for product
development and to outlicense the commercial rights to development partners. By
forming strategic alliances with major pharmaceutical and diagnostic companies
it is believed that the ACCESS technology will be more rapidly developed and
successfully introduced into the marketplace. Potential strategic partners are
and will continue to be screened based on the technology synergy, development
capabilities, expertise in the therapeutic/diagnostic area and
 
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<PAGE>   66
 
ability to globally maximize the potential product opportunity. Strategic
alliance agreements will be structured around milestone and diligence payments
commensurate with the opportunity, the level of development partner funding of
clinical development and regulatory costs and ACCESS receiving a royalty based
on worldwide product revenues.
 
SCIENTIFIC BACKGROUND
 
     Preclinical work to date has demonstrated that ACCESS' technology enhances
the performance of therapeutic and diagnostic/prognostic imaging agents by
binding them to GLYCOS carriers which rapidly target these bound actives to
sites of tissue disease and cause them to remain there for longer intervals
while rapidly clearing the nontargeted fraction. The GLYCOS technology is
patterned after an immune targeting system present in the body. GLYCOS mimic the
body's defense systems and appear capable of recognizing neovascular receptors
selectively at sites of disease, crossing vascular barriers and targeting drug
payloads to tumor sites, infections, inflammatory lesions, cardiovascular
disease and potentially other disease entities.
 
     ACCESS GLYCOS carriers are derived from natural sources and comprise the
carbohydrate portions of natural proteoglycans. GLYCOS have favorable toxicity
profiles compared to synthetic molecules. Also, currently they are the only cost
effective carrier substances available in the class of complex carbohydrates.
Examples of ACCESS carriers include heparin and dermatan sulfate, the former an
approved substance worldwide, and the latter a product in advanced clinical
development in Europe.
 
     Since its founding, ACCESS has been researching various GLYCOS for their
targeting, biodistribution, and clearance properties. ACCESS is now able to
select the combination of GLYCOS and active substances to provide optimal
formulation characteristics, minimize the dose-related side effects in
preclinical testing, optimize clearance rates and routes of different drugs and
potentially obtain site selectivity for different major classes of disease,
beginning with cancer and infection.
 
     Importantly, the binding of drugs and imaging agents to GLYCOS carriers is
typically by noncovalent physical processes. This results in simple formulations
which utilize existing, approved/approvable substances as carriers and are
expected to be compatible with a range of drugs and imaging agents.
 
     Unique to ACCESS, GLYCOS carriers bind first to the body's endothelial
receptors that are induced on the microvascular barrier between the bloodstream
and the tissue sites of disease. Consequently, in a fashion similar to the
body's own cellular immune mechanisms, ACCESS' GLYCOS formulations progressively
accumulate and cross into sites of disease from their initial binding/targeting
sites on induced endothelium and are able to continue such accumulation with
repeated dosing, depending on the nature, severity and persistence of the
disease and the tissue mediators. Being sulphated polysaccharides, these GLYCOS
appear to avoid inducing anticarrier antibodies to themselves except in the
extremely low incidence established for therapeutic heparinoids.
 
     Attaching a GLYCOS carrier to a drug or imaging agent causes the drug or
imaging agent to accumulate at the site of tissue damage more rapidly and to a
significantly greater extent than without the GLYCOS. Moreover, by piggybacking
on the physiological pathway that allows cells and molecules to penetrate the
endothelial barrier and permeate deep into the underlying tissue lesion, GLYCOS
help bring the drug closer to all sub-regions and cells of the pathologic
lesion.
 
     ACCESS believes that both the polymeric and multivalent binding properties
of GLYCOS are important for optimal disease site-localization of the attached
drug or diagnostic/prognostic. These aspects are important in optimizing
biodistribution, targeting and clearance and may also promote displacement of
the endogenous interfering substances which can be bound to diseased
endothelium, further enhancing the active endothelial translocation of the
GLYCOS drug or diagnostic into underlying sites of disease.
 
     Drug and diagnostic enhancement by ACCESS' GLYCOS occurs by a number of
mechanisms, the principal ones being rapid selective targeting to tissue sites
of disease, stabilization of the active during both storage and plasma transmit,
longer retention at the site of disease and rapid clearance of the non-targeted
fraction giving reduced imaging backgrounds and reduced drug toxicity.
 
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<PAGE>   67
 
ACCESS PRODUCT DEVELOPMENT
 
     ACCESS begins the product development effort by screening and formulating
potential product candidates, selecting an optimal active and formulation
approach and developing the processes and analytical methods. Pilot stability,
toxicity and efficacy testing are conducted prior to advancing the product
candidate into formal pre-clinical development. Specialized skills are required
to produce these product candidates utilizing the ACCESS technology. ACCESS has
a core internal development capability with significant experience in these
formulations.
 
     Once the product candidate has been successfully screened in pilot testing,
ACCESS scientists together with external consultants, assist in designing and
performing the necessary preclinical efficacy, pharmacokinetic and toxicology
studies required for IND submission. External investigators and scale-up
manufacturing facilities are selected in conjunction with Company consultants.
ACCESS does not plan to have an extensive clinical development organization as
this would be conducted by a development partner.
 
DEVELOPMENT AND RESEARCH PROJECTS
 
     With all of ACCESS' product development candidates, there can be no
assurance that the results of the in vitro or animal studies are or will be
indicative of the results that will be obtained when these product candidates
are tested in humans. There can be no assurance that any of these projects will
be successfully completed or that regulatory approval of any product will be
obtained.
 
CANCER
 
     Chemotherapy, surgery and radiation are the major components in the
clinical management of cancer patients. Chemotherapy is usually the primary
treatment of hematologic malignancies, which cannot be excised by surgery, and
is increasingly used as an adjunct to radiation and surgery, to improve
efficacy, and is used as the primary therapy for some solid tumors and
metastases. The current optimal strategy for chemotherapy involves exposing
patients to the most intensive cytotoxic regimens they can tolerate. Clinicians
attempt to design a combination of drugs, dosing schedule and method of
administration to increase the probability that cancerous cells will be
destroyed while minimizing the harm to healthy cells.
 
     Most current drugs have significant limitations. Certain cancers are
inherently unresponsive to chemotherapeutic agents, other cancers initially
respond but subgroups of cancer cells acquire resistance to the drug during the
course of therapy, with the resistant cells surviving and resulting in relapse.
As the cells acquire resistance to a specific agent, they often simultaneously
become resistant to a wide variety of agents through a phenomenon known as
multi-drug resistance. Another limitation of current anti-cancer drugs is that
serious toxicity, including bone marrow suppression or irreversible
cardiotoxicity, can prevent their administration in curative doses.
 
     ACCESS' cancer program is aimed at formulating generic chemotherapy agents
and proprietary products to enhance efficacy and reduce the toxicity compared
with the currently available chemotherapeutics.
 
  Product in Development
 
     AP-4010 -- ACCESS currently has one product in development, a GLYCOS-based
doxorubicin formulation for intravenous administration.
 
     The most widely used cancer agents are anthracyclines, such as doxorubicin,
which are broadly effective against proliferating cancer cells. Anthracyclines
have a number of limitations, certain cancer types are unresponsive and can
cause severe toxic effects, including myelosuppression, mucositis and cumulative
irreversible cardiotoxicity.
 
     ACCESS' animal studies have shown that higher doses of the product can be
tolerated with less acute toxicity and hence greater efficacy than standard
doxorubicin. It is possible that AP-4010 may have a better pharmacokinetic
profile than existing formulations of doxorubicin.
 
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<PAGE>   68
 
     ACCESS is currently conducting pilot scale up of production of AP-4010 for
animal toxicity testing prior to submission of an IND which ACCESS anticipates
filling in approximately 12 months. The clinical indications are currently under
evaluation by external company consultants.
 
INFECTIOUS DISEASES
 
     Systemic fungal infections are a major problem for patients with impaired
immune defense mechanisms, particularly cancer patients, diabetics and AIDS
patients. Available agents for the treatment of systemic fungal infections
include amphotericin B and fluconazole. Despite the availability of these
agents, serious fungal infections remain difficult to treat. Because fluconazole
is not effective in treating many strains of fungi and amphotericin B toxicities
remain difficult to manage at effective doses, mortality rates among such
patients remain high.
 
  Product in Development
 
     AP-1110 -- ACCESS' product development is focused on a GLYCOS-based
formulation of Amphotericin B, an effective cytocidal compound whose
effectiveness and regimens are limited by severe nephrotoxicity and prolonged
blood and body clearance. Amphotericin B remains the standard in the treatment
of fungal infections, however, because of nephroxicity, limitations on intensive
higher dosing regimens, it is difficult to cure many deep fungal infections.
 
     The GLYCOS formulation significantly reduces kidney toxicity by redirecting
the clearance of the drug through the liver, where no new hepatotoxicity has
been observed (in subacute mouse toxicity tests). The clearance in animals of
amphotericin B appears accelerated from 120 hours to 24 hours with the GLYCOS
formulation. Based on its improved tolerance and clearance, in animal testing it
was possible to sufficiently increase the dosing and regimen intensity of the
GLYCOS formulation to achieve cures, whereas none could be achieved with the
standard formulation.
 
     An additional animal study to confirm the findings with a second, fungal
model is required prior to formulation scale up and proceeding toward an IND.
This project had been scheduled as a subsequent development, pending further
definition of the market potential and the interest of a strategic partner. It
is now clear that this product candidate should be moved into clinical
development.
 
MRI DIAGNOSTIC AGENTS
 
     Preoperative diagnostic imaging technologies are used to determine the
existence and the extent of disease. The principal diagnostic imaging
technologies are CT Scanning and Magnetic Resonance Imaging ("MRI"). Both
methods produce images that show anatomic boundaries between the tissue
suspected of being malignant and the surrounding tissue, to reveal potential
disease. Neither method gives information allowing a clear distinction of
malignant from nonmalignant tissue. A more recently developed technology,
immunoscintigraphy, uses a gamma-ray detection camera externally to identify
internally localized radiolabeled antibodies potentially specific to certain
cancers. Although immunoscintigraphy with certain radiolabeled antibodies
appears capable of distinguishing malignant tumors from nonmalignant lesions and
surrounding tissues, none of the external imaging technologies, including
immunoscintigraphy, is effective in consistently identifying primary tumors
smaller than one centimeter, in precisely locating the site or margins of the
tumor, in consistently identifying all metastatic tumor nodules, or in
distinguishing pre-invasive from functionally invasive tumor behaviors.
 
     The currently available contrast agents for MRI are nonselective gadolinium
based extracellular agents predominantly used in imaging the central nervous
system.
 
     ACCESS is focused on expanding the utility of MRI imaging to include body
imaging by developing a site-selective intravenous contrast agent with improved
localization and performance outside as well as within the central nervous
system. ACCESS believes that improved site selectivity, longer site contrast
with rapid blood clearance, the ability to clearly delineate tumor boundaries
and metastases and the opportunity to obtain
 
                                       57
<PAGE>   69
 
additional valuable information on prognosis, function, therapeutic response
monitoring and anatomy at high resolution, could be major competitive advantages
of the GLYCOS formulations.
 
  Product in Development
 
     AP-2011 -- A pilot formulation utilizing the GLYCOS carrier, a chelating
agent and gadolinium has been prepared and an acceptable acute toxicity profile
obtained.
 
     Prior to advancing this product candidate further, additional toxicity and
animal efficacy studies are required. Encouraging initial results, including the
successful, rapid contrast enhancement of tumors of the liver and nonliver
tumors have been obtained in four different animal models and in three different
species. Acute toxicity studies have been completed. Production of GMP materials
and sub-acute toxicity testing is required before submission of an IND.
 
RADIOPHARMACEUTICALS
 
     Given currently available technologies, diagnostic techniques such as CT,
MRI and immunoscintigraphy are projected to be used by a large number of
physicians to detect, stage and monitor cancer. CT and MRI currently have not
effectively distinguished malignant from non-malignant tissue. Several
biotechnology-based companies are developing antibody products for
immunoscintigraphy in colorectal, ovarian, small cell lung, melanoma and breast
cancer. Although immunoscintigraphy with antibody agents and peptides has the
capacity to distinguish malignant from non-malignant tissue, none of the
technologies is effective in consistently identifying tumors smaller than one
centimeter or in precisely locating the site of a tumor. They only indicate that
cancer may be present within a general area. Because of these limitations, the
physician may frequently be making decisions concerning surgery and other
therapy with incomplete information.
 
     To date, radiopharmaceuticals have been limited to diagnostic indications
and bone pain management in patients with metastatic prostate cancer. There has
been little use in therapy due to the toxicities associated with the
radionuclides necessary to achieve therapeutic benefits, and also due to the
hetrogeneity of tumor-specific antigens on tumor cells and subregions, with the
prominent exception of B-cell lymphomas.
 
  Diagnostic Applications
 
     A pilot GLYCOS radiopharmaceutical diagnostic imaging agent has been
prepared and tested utilizing Gallium67. Animal studies have shown that the
GLYCOS have the ability to rapidly target and permeate AT-1 prostate tumors in
grown rats. These studies also showed fast clearance by the renal route and
negligible liver uptake. These characteristics support the development of
radiolabeled agents for tumor imaging. The pilot studies indicate selective
tumor localization of the radiolabeled agent within 5 minutes of injection
allowing optimal imaging between 15 minutes and 1 hour post injection.
 
     GLYCOS may provide the key additional information of tumor function and
prognosis in a way which can improve clinical diagnosis and staging, and allow
rapid early decision-making on patient management and therapeutic approaches,
including intraoperative approaches.
 
     Before advancing to preclinical development, product optimization
including, the selection of a radionuclide, chelator and GLYCOS carrier, must be
finalized in conjunction with an external advisory group.
 
PATENTS
 
     ACCESS believes that the value of the technology both to ACCESS and to
potential corporate partners is established and enhanced by its strong, broad
and specific intellectual property positions. Consequently, ACCESS already has
issued and seeks to obtain additional U.S. and foreign Patent protection for
products under development and for new discoveries. Patent applications are
filed with the U.S. Patent and Trademark Office and, when appropriate, with the
Paris Convention's Patent Cooperation Treaty (PCT) Countries (most major
countries in Western Europe and the Far East) for its inventions and prospective
products.
 
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<PAGE>   70
 
     ACCESS holds U.S. and European patents with broad composition of matter
claims encompassing glycosaminoglycan, acidic saccharide, carbohydrate and other
endothelial-binding and targeting carriers in combination with drugs and
diagnostic agents formulated by both physical and chemical covalent means. Eight
Patents have issued commencing in 1990 and an additional eight major patent
applications are pending.
 
     These patents and applications broadly cover the in vivo medical uses of
drugs and diagnostic carrier formulations which bind and cross endothelial and
epithelial barriers at sites of disease, including but not limited to treatment
and medical imaging of tumor, infarct, infection and inflammation. They further
disclose the body's induction of endothelial, epithelial, tissue and blood
adhesins, selectins, integrins, chemotaxins and cytotaxins at sites of disease
as a mechanism for selective targeting, and they claim recognized usable carrier
substances which selectively bind to these induced target determinants.
 
     ACCESS has a strategy of maintaining an ongoing line of continuation
applications for each major category of patentable carrier and delivery
technology. By this approach, ACCESS is extending the intellectual property
protection of its basic targeting technology and initial agents to cover
additional specific carriers and agents, some of which are anticipated to carry
the priority dates of the original applications.
 
     The intellectual property around which ACCESS was founded was originally
licensed by way of a License Agreement from the inventor and principal
shareholder Dr. David Ranney. A Patent Purchase Agreement dated April 5, 1994
terminated the License Agreement and provided for assignment of the rights to
the original patents to ACCESS. Additional patents covering the technology were
purchased from the University of Texas system on October 31, 1990 and applied
for directly by ACCESS. The technology was developed by Dr. David Ranney during
his tenure at the University of Texas Southwestern Medical School which retains
a royalty free non-exclusive right to use the patent rights for its own
research, teaching and other educationally-related purposes.
 
     Dr. David Ranney has signed an Assignment of Intellectual Property
Agreement whereby all rights, title and interest in and to all subsequent
inventions and confidential information will become the sole and exclusive
property of ACCESS at the earlier of the date of conception or development,
while he remains an employee of ACCESS and for a period of two years after he
ceases employment for inventions relating to the ACCESS technology.
 
     Under the terms of the Patent Purchase Agreement Dr. David Ranney has
retained certain rights and interests in the intellectual property which are
subject to further modification at the effective time of the closure of the
Merger as provided in the Stockholder's Agreement, including a non-exclusive
right to use the inventions and technology covered by or relating to the patents
for his own research, teaching or other academic related purposes, and after he
is no longer a full-time employee of ACCESS for research and development of uses
or implementations of the inventions and technology improvements. ACCESS
maintains the first right to negotiate the acquisition of any new inventions or
technology improvements developed by Dr. David Ranney relating to the
technology. ACCESS has agreed to pay Dr. David Ranney a royalty of three
quarters of one percent (0.75%) of ACCESS gross revenues derived from products
covered by the patents and pay certain minimum payments which began in 1994, and
which are subject to further modification at the effective time of the closure
of the Merger.
 
     In addition the Patent Purchase Agreement as amended subject to the closure
of the Merger, establishes certain additional rights of Dr. David Ranney. The
patent assignment will terminate in the event ACCESS fails to pay the amounts
due to Dr. David Ranney pursuant to the Agreement, files a Petition in
Bankruptcy, fails to commercially develop the patents or creates a security
interest in the patents without Dr. David Ranney's approval. Also, in the event
that parts of the ACCESS technology are not being developed four years after the
Merger Dr. David Ranney has the right of first refusal to license or acquire at
fair market value development rights to such parts of the ACCESS technology.
 
GOVERNMENT REGULATIONS
 
     ACCESS is subject to extensive regulations by the Federal Government,
principally by the FDA, and, to a lesser extent, by other Federal and State
agencies as well as comparable agencies in foreign countries where
 
                                       59
<PAGE>   71
 
registration of products will be pursued. Although a number of ACCESS GLYCOS
formulations incorporate extensively tested drug substances, because the
resulting GLYCOS formulations make claims of enhanced efficacy and/or improved
side effect profiles they are expected to be classified as new drugs by the FDA.
 
     The Federal Food, Drug and Cosmetic Act and other federal and state
statutes and regulations govern the testing, manufacturing, safety, labeling,
storage, shipping and record keeping of ACCESS' products. The FDA has the
authority to approve or not approve new drug applications and inspect research
and manufacturing records and facilities.
 
     Among the requirements for drug approval and testing is that the
prospective manufacturer's facilities and methods conform to the FDA's Code of
Good Manufacturing Practices regulations which establish the minimum
requirements for methods to be used in, and the facilities or controls to be
used during the production process and the facilities are subject to ongoing FDA
inspection to insure compliance.
 
     The steps required before a pharmaceutical product may be produced and
marketed in the U.S. include preclinical tests, the filing of an IND with the
FDA, which must become effective pursuant to FDA regulations before human
clinical trials may commence and the FDA approval of an NDA prior to commercial
sale.
 
     Preclinical tests are conducted in the laboratory, usually involving
animals, to evaluate the safety and efficacy of the potential product. The
results of preclinical tests are submitted as part of the IND application and
are fully reviewed by the FDA prior to granting the sponsor permission to
commence clinical trials in humans. Clinical trials typically involve a
three-phase process. Phase I, the initial clinical evaluations, consists of
administering the drug and testing for safety and tolerated dosages as well as
preliminary evidence of efficacy in humans. Phase II involves a study to
evaluate the effectiveness of the drug for a particular indication and to
determine optimal dosage and dose interval and to identify possible adverse side
effects and risks in a larger patient group. When a product is found effective
in Phase II, it is then evaluated in Phase III clinical trials. Phase III trials
consist of expanded multi-location testing for efficacy and safety to evaluate
the overall benefit-to-risk index of the investigational drug in relationship to
the disease treated. The results of preclinical and human clinical testing are
submitted to the FDA in the form of an NDA for approval to commence commercial
sales.
 
     The process of doing the requisite testing, data collection, analysis and
compilation of an IND and an NDA is labor intensive and costly and may take a
protracted time period. In some cases tests may have to be re-done or new tests
instituted to comply with FDA requests. Review by the FDA may also take a
considerable time period and there is no guarantee an NDA will be approved.
Hence, ACCESS cannot with any certainty estimate how long the approval cycle may
take.
 
     Current U.S. government revisions to the U.S. healthcare system are not yet
known in detail, but could have an impact on the pharmaceutical industry,
possibly in the form of pricing restrictions. Although ACCESS is developing new
novel drugs in the field of cancer and infectious disease that are currently not
treated effectively, there still can be no assurance that certain pricing
constraints would not pertain.
 
     ACCESS is also governed by other federal, state and local laws of general
applicability, such as laws regulating working conditions, employment practices,
as well as environmental protection.
 
COMPETITION
 
     The pharmaceutical and biotechnology industry is highly competitive. Most
pharmaceutical and biotechnology companies have considerably greater research
and development, financial, technical and marketing resources than ACCESS.
Although ACCESS' proposed products utilize a novel drug delivery system, they
will be competing with established pharmaceutical companies existing and planned
new product introductions and alternate delivery forms of the active substance
being formulated by ACCESS.
 
     A number of companies are developing or may, in the future, engage in the
development of products competitive with the ACCESS delivery system. Currently,
in the therapeutic area, liposomal formulations being developed by Nexstar,
Inc., The Liposome Company, Inc. and Sequus Pharmaceuticals, Inc. are the
 
                                       60
<PAGE>   72
 
major competitive intravenous drug delivery formulations which utilize similar
drug substances. A number of companies are developing or evaluating enhanced
drug delivery systems. ACCESS expects that technological developments will occur
at a rapid rate and that competition is likely to intensify as various
alternative delivery system technologies achieve certain if not identical
advantages.
 
     The principal current competitors to ACCESS' technology fall into three
categories: monoclonal antibodies, liposomes and peptides. ACCESS believes its
technology represents a significant advance over these older technologies
because it is the only system with a favorable pharmacokinetic profile which has
been shown to effectively bind and cross neovascular barriers and to deeply
penetrate the major classes of deep tissue and organ disease, which remain
partially inaccessible to older technologies.
 
     Even if ACCESS' products are fully developed and receive required
regulatory approval, regarding which there is no assurance, ACCESS believes that
its products can only compete successfully if marketed by a company having
expertise and a strong presence in the therapeutic area. Consequently, ACCESS
does not currently plan to establish an internal marketing organization. By
forming strategic alliances with major pharmaceutical and diagnostic medical
imaging companies, management believes that ACCESS' development risks should be
minimized and the technology will potentially be more rapidly developed and
successfully introduced into the marketplace.
 
EMPLOYEES
 
     As of September 30, 1995 ACCESS has 8 full time employees and one part time
employee two of whom have advanced scientific and medical degrees. ACCESS
believes that it maintains good relations with its personnel. In addition, to
complement its internal expertise, ACCESS contracts with scientific consultants,
contract research organizations and university research laboratories that
specialize in various aspects of drug development including toxicology,
sterility testing and preclinical testing to complement its internal expertise.
 
PROPERTIES
 
     ACCESS maintains one facility of administrative offices and laboratories in
Dallas, Texas. ACCESS has a lease agreement for the facility which has
approximately 5,500 square feet, which terminates in January 1998. Adjacent
space is available for expansion which would accommodate the growth planned for
the foreseeable future.
 
LEGAL PROCEEDINGS
 
     ACCESS is not a party to any legal proceedings.
 
                                       61
<PAGE>   73
 
                       SELECTED FINANCIAL DATA OF ACCESS
 
     The following data, insofar as it relates to each of the years in the five
year period ended December 31, 1994, has been derived from the audited financial
statements of ACCESS and notes thereto appearing elsewhere herein. The data for
the nine-month periods ended September 30, 1995 and September 30, 1994 have been
derived from unaudited financial statements also appearing herein and which, in
the opinion of management, include all adjustments (consisting only of normal
recurring adjustments) necessary for a fair statement of the financial position
and results for the unaudited interim periods presented. The operating results
for the interim periods are not necessarily indicative of results for any future
period. The report of Smith, Anglin & Co. which also appears herein contains an
explanatory paragraph which states that there is substantial doubt about the
ability of ACCESS to continue as a going concern.
 
<TABLE>
<CAPTION>
                                       FOR THE
                                     NINE MONTHS
                                        ENDED                             FOR THE
                                    SEPTEMBER 30,                 YEAR ENDED DECEMBER 31,
                                   ----------------    ----------------------------------------------
                                    1995      1994      1994     1993       1992      1991      1990
                                   ------    ------    ------   -------    ------    ------    ------
                                          (THOUSANDS, EXCEPT FOR NET INCOME (LOSS) PER SHARE)
<S>                                <C>       <C>       <C>      <C>        <C>       <C>       <C>
INCOME STATEMENT DATA:
Total Revenues...................  $  579    $  530    $1,048   $   356    $  694    $1,841    $  403
Total Expenses...................   1,049     1,095     1,524     1,740     1,554     1,427       621
Net Income (Loss)................    (470)     (565)     (476)   (1,384)     (860)      414      (218)
COMMON STOCK DATA:
Net Income (Loss) Per Share......  $ (.16)   $ (.19)   $ (.16)  $  (.47)   $ (.29)   $  .14    $ (.08)
Average Number of Common Shares
  and Common Equivalent Shares
  Outstanding....................   2,926     2,918     2,918     2,918     2,918     2,916     2,916
</TABLE>
 
<TABLE>
<CAPTION>
                                                                           DECEMBER 31,
                                            SEPTEMBER 30,    -----------------------------------------
                                                1995         1994     1993     1992     1991     1990
                                            -------------    -----    -----    -----    -----    -----
<S>                                         <C>              <C>      <C>      <C>      <C>      <C>
BALANCE SHEET DATA:
Total Assets..............................        754        1,261    1,079    2,444    3,558    3,462
Total Liabilities.........................        523          731       71       53      397    1,188
Stockholders' Equity......................        231          531    1,007    2,391    3,161    2,274
</TABLE>
 
                                       62
<PAGE>   74
 
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
           OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF ACCESS
 
  Liquidity and Capital Resources
 
     ACCESS is primarily engaged in developing enhanced intravenous therapeutics
and diagnostic agents using GLYCOS, a natural carbohydrate technology, through
the utilization of its patented and proprietary endothelial binding technology
which selectively target sites of disease.
 
   
     On April 26, 1994, ACCESS entered into agreements, as amended, with Corange
International Ltd. ("Corange") to develop drugs based on Access' endothelial
binding technology for the use in the oncology area. Under the agreements,
ACCESS granted Corange an option for a period up to two years, as defined, to
exclusively license worldwide any oncology agent developed pursuant to the terms
of the common research agreement. In 1994, Corange made initial option payments
of $600,000. Corange made $618,532 payments representing research and equipment
costs. Corange made further payments in 1995: research payments of $285,000, and
reimbursement of other research costs of $109,937. Corange terminated the
agreements on June 30, 1995.
    
 
     An option agreement with Yamanouchi Pharmaceutical Co., Ltd.
("Yamanouchi"), a major international pharmaceutical company, accounted for 100%
of the option income for 1993. The agreement was limited to the license of one
MRI product in a specified geographical area. In March 1994, Yamanouchi declined
to exercise its option.
 
     A joint research agreement with Yamanouchi for an Amphotericin formulation
accounted for 100% of the research and development revenues in 1992. This joint
research agreement was terminated by Yamanouchi effective July 31, 1992.
 
     As a result of the termination of the above agreements and options, ACCESS
has no active corporate sponsored research agreements. ACCESS has funds to meet
its projected cash expenditures through January 1996. ACCESS has been engaged
actively in pursuing additional equity financing, and/or partnering with major
pharmaceutical companies to attain financing, and/or merging ACCESS with a third
party. There can be no assurance that ACCESS will be successful in attaining
such financing and there remains a risk that ACCESS will be required to cease or
curtail active operations until additional funding is received.
 
  Comparison of Nine Months Ended September 30, 1995 and 1994
 
     Net revenues for the nine months ended September 30, 1995 were $574,937, as
compared to the same period in 1994 of $525,000, a reduction of $49,937. The
reduction is due to project and option revenues received from Corange. ACCESS
recorded seven months project revenue and reimbursement of research costs in
1995 whereas only five months project revenue and option payments were received
in 1994.
 
     Research and development expenses for the first nine months of 1995 were
$515,656 as compared to $523,564 for the same period in 1994, a decrease in
spending of $7,908. The decrease is due mainly to the reduced project activity
due to the termination of the Corange agreement.
 
     Total general and administrative were $391,080 for the first nine months of
1995, as compared to $487,319 for the comparable 1994 period, a reduction in
spending of $96,239. The reduction in spending in 1995 as compared to 1994 was
principally as follows: lower salary and related expenses -- $73,713 due to the
reduction of staff; lower legal fees -- $23,517 due to 1994 legal costs
associated with Corange agreements whereas 1995 related fees were minor; lower
investment banker costs -- $19,988 due to the termination of the investment
banker relationship; offset partially by higher patent costs -- $21,390
associated with the filing of new patents.
 
     Depreciation and amortization expenses for the nine months of 1995 were
$92,685 as compared to $83,187 for the comparable period in 1994 for an increase
of $9,498. The increase is due to depreciation on new equipment purchased for
the Corange oncology project.
 
                                       63
<PAGE>   75
 
     Interest expense for the nine months of 1995 were $49,631 as compared to
$810 for the comparable period in 1994 for an increase of $48,821. The increase
is due to nine months of interest costs in 1995 from to the sale leaseback of
assets and for the lease purchase of scientific equipment, both completed in
September 1994.
 
     As a result, the net loss for the nine months ended September 30, 1995 was
$469,557 or $.16 per share as compared to a net loss in the comparable 1994
period of $565,110 or $.19 per share. The difference is principally due to
revenues received for the Corange oncology project for seven months in 1995 as
compared to only five months of reimbursed costs in 1994 and lower general and
administrative expenses offset principally by higher interest expenses.
 
  Comparison of Years ended December 31, 1994 and 1993
 
   
     Revenues in 1994 were $1,038,532, an increase of $716,310 over 1993.
Revenues in 1994 were only from Corange and revenues in 1993 were only from
Yamanouchi. In April 1994, ACCESS concluded agreements, as amended, with Corange
for $1,038,532. The agreements were to develop drugs based on ACCESS'
endothelial binding technology for the use in the technology area and an option
for a period up to two years, as defined to exclusively license the product
worldwide.
    
 
     Total research and development expenses were $714,024 for 1994, a reduction
of $127,408 as compared with fiscal 1993. The reduction of spending was due to
wind up costs associated with the completion of Yamanouchi MRI project and the
start up of the new Corange oncology projects whereas 1993 had a full year of
active project costs.
 
     General and administrative expenses were $694,715 in 1994, a reduction of
$60,570 as compared to 1993. The reduction was due primarily to lower new
business professional fees ($70,125), scientific consulting ($19,207), travel
and entertainment ($26,024) offset partially by higher patent costs ($34,376)
and legal fees ($26,595).
 
     Other income-interest and miscellaneous income was $9,333 for 1994, a
reduction of $24,763 as compared with fiscal 1993. The reduction in other income
was due to lower cash balances on hand.
 
     Total expenses were $1,525,097 for fiscal 1994, as compared to $1,707,624
in 1993, a reduction of $182,527. The net loss in 1994 was $476,232 or a
reduction in loss of $907,296 from 1993. The reduction in net loss for 1994 as
compared to 1993 was principally due to the higher revenues received from
Corange due to the start of the oncology project and the net effect of research
and development and general cost reductions in 1994.
 
   
     Consequently, the net loss for 1994 was $476,232, or $.16 loss per common
share, as compared to a net loss of $1,383,528 or $.47 loss per common share in
1993.
    
 
  Comparison of Years Ended December 31, 1993 and 1992
 
     Total 1993 revenues were $322,222 received in 1993, a $266,434 decrease
from 1992. The decrease in revenues from 1992 was due to the change in research
projects at ACCESS. In 1993 the primary ACCESS project was the Yamanouchi-MRI
project where major funding of the MRI project of $950,000 in option funding was
received in 1991 and was supplemented with $322,222 to extend the option in
1993. Funding in 1992 was for research and development costs associated with the
Yamanouchi Amphotericin project.
 
     Research projects and development expenses were $841,432 for 1993, a
reduction of 228,401 as compared with fiscal 1992. The reduction of spending was
due to the change in projects which resulted in lower scientific salaries and
related costs and lower external contract expenditures associated with the
projects.
 
   
     General and administrative expenses were $755,285 in 1993, a $322,946
increase over the 1992 comparable period. The primary reasons for the increase
are detailed as follows: higher salaries and related employee expenses
($165,822), new business professional fees ($45,578), scientific consulting
($23,279), travel and entertainment ($51,024) and investment banking costs
($28,036) offset partially by lower patent costs ($28,340).
    
 
                                       64
<PAGE>   76
 
     Depreciation expenses were $110,907 in 1993, a $15,284 increase over the
1992 comparable period. The increase was due to new equipment bought for the MRI
project in mid-1992 which was depreciated only one-half year in 1992 but
depreciated one full year in 1993.
 
     Other income-interest and miscellaneous income was $34,096 for 1994, a
reduction of $71,621 as compared with fiscal 1993. The reduction was due to
lower cash balance on hand due to the termination of the Yamanouchi Amphotericin
project in July 1992.
 
   
     Total expenses were $1,707,624 for 1993, as compared to $1,597,795 in 1992.
Losses before income taxes were $1,351,306 in 1993, as compared to $903,422 in
1992. The increase loss in 1993 of $447,884 was principally as follows: (1)
lower revenues; $266,434, due to funding differences in projects; (2) higher
general and administrative expenses $322,946, due mainly to new business
efforts; (3) higher depreciation expenses ($15,284); (4) lower other income
($71,621); and (5) offset partially by lower research and development expenses
($228,401).
    
 
     As a result, net loss for 1993 was $1,383,528, or $.47 loss per common
share, as compared to a net loss of $859,546, or $.29 loss per common share for
1992.
 
                                       65
<PAGE>   77
 
                               CHEMEX AND ACCESS
 
                        PRO FORMA FINANCIAL INFORMATION
 
     The following unaudited pro forma combining balance sheet as of September
30, 1995 has been prepared using "purchase" accounting with ACCESS as the
acquirer, assuming that the merger of ACCESS and Chemex had occurred on
September 30, 1995. The values used in the preparation of the pro forma
financial statements were determined based on negotiations between companies and
comparable values for companies at ACCESS' stage of development. This statement
should be read in conjunction with the audited financial statements of ACCESS
and Chemex contained elsewhere in this Proxy Statement/Prospectus.
 
     The following unaudited pro forma combining statements of operations for
the year ended December 31, 1994 and for the nine month period ended September
30, 1995 have been prepared using "purchase" accounting with ACCESS as the
acquirer, assuming that the merger of ACCESS and Chemex had occurred on January
1, 1994. The values used in the preparation of the pro forma financial
statements were determined based on negotiations between companies and
comparable values for companies at ACCESS' stage of development. The statements
should be read in conjunction with the audited financial statements of ACCESS
and Chemex contained elsewhere in this Proxy Statement/Prospectus.
 
                                       66
<PAGE>   78
 
                   PRO FORMA COMBINED CONDENSED BALANCE SHEET
                               SEPTEMBER 30, 1995
                                  (UNAUDITED)
 
                                   HISTORICAL
 
<TABLE>
<CAPTION>
                                         CHEMEX             ACCESS         PRO FORMA
                                    PHARMACEUTICALS,   PHARMACEUTICALS,   ADJUSTMENTS         PRO FORMA
                                          INC.               INC.           (NOTE 1)           COMBINED
                                    ----------------   ----------------   ------------       ------------
<S>                                 <C>                <C>                <C>                <C>
ASSETS
Current assets:
  Cash and cash equivalents.......    $  2,348,000                 --                        $  2,348,000
  Accounts receivable.............          12,000       $    139,000                             151,000
  Prepaid expenses and other
     assets.......................          25,000                 --                              25,000
                                      ------------       ------------                          ----------
  Total current assets............       2,385,000            139,000                           2,524,000
Property, equipment and leasehold
  improvements, at cost...........          95,000            511,000                             606,000
Less accumulated depreciation and
  amortization....................         (64,000)          (146,000)                           (210,000)
                                      ------------       ------------                          ----------
                                            31,000            365,000                             396,000
Patents and application, net......                            248,000                             248,000
Other assets......................           1,000              2,000                               3,000
                                      ------------       ------------                          ----------
Total assets......................    $  2,417,000       $    754,000                        $  3,171,000
                                      ============       ============                          ==========
LIABILITIES AND
  STOCKHOLDERS' EQUITY
  (DEFICIT)
Current liabilities:
  Accounts payable................    $    126,000       $    118,000                        $    244,000
  Lease termination obligation....          60,000                 --                              60,000
  Accrued liabilities.............          13,000                 --     $    220,000(c)         233,000
  Current portion of capital
     leases.......................              --            159,000                             159,000
                                      ------------       ------------     ------------         ----------
  Total current liabilities.......         199,000            277,000          220,000            696,000
Long-term liabilities.............          10,000            246,000                             256,000
                                      ------------       ------------     ------------         ----------
Total liabilities.................         209,000            523,000          220,000            952,000
                                      ------------       ------------     ------------         ----------
Stockholders' equity (deficit)
  Preferred stock.................              --                 --                                  --
  Common stock....................         350,000             36,000          864,000(a)         900,000
                                                                              (350,000)(b)
  Additional paid-in capital......      40,367,000          3,411,000        9,136,000(a)      12,547,000
                                                                           (40,367,000)(b)
  Treasury stock..................          (5,000)                --            5,000(b)              --
  Deficit.........................     (38,504,000)        (3,216,000)     (10,000,000)(a)    (11,228,000)
                                                                            38,504,000(b)
                                                                             2,208,000(b)
                                                                              (220,000)(c)
                                      ------------       ------------     ------------         ----------
  Total stockholders equity.......       2,208,000            231,000         (220,000)         2,219,000
                                      ------------       ------------     ------------         ----------
Total Liabilities and Stockholders
  Equity..........................    $  2,417,000       $    754,000     $         --       $  3,171,000
                                      ============       ============     ============         ==========
</TABLE>
 
      See accompanying Notes to Pro Forma Combined Condensed Balance Sheet
 
                                       67
<PAGE>   79
 
                   NOTES TO PRO FORMA CONDENSED BALANCE SHEET
 
   
Note 1: The above statement gives effect to the following pro forma adjustments
        necessary to reflect the merger of Chemex and ACCESS, with ACCESS being
        the acquirer for accounting purposes, as if the transaction had occurred
        September 30, 1995.
    
 
(a)      To record the exchange, for accounting purposes, by ACCESS shareholders
         of their common stock (valued at $10,000,000) for 13,750,000 shares of
         Chemex (or 60% of Chemex's shares to be outstanding after the merger is
         consummated)(for legal purposes 13,750,000 shares of Chemex will be
         issued to acquire all the outstanding shares of ACCESS). The value
         placed on the shares was determined based on negotiations between the
         companies and comparable values for companies at ACCESS' stage of
         development. The valuation of the acquisition used in the accompanying
         proforma balance sheet is equivalent to approximately 75 cents per
         share of Chemex's common stock, before expenses of the Merger. The
         excess purchase price over the fair value of Chemex's assets acquired
         is being charged to deficit.
 
(b)      To eliminate the shareholders equity section of Chemex in connection
         with the merger and credit the net equity to combined deficit.
 
(c)      Accrual of $220,000 of estimated legal, accounting and other
         professional fees relating to the acquisition and merger.
 
     After the consummation of the transactions described herein, the Company
will have 40,000,000 common shares authorized, approximately 22,500,000 common
shares issued and outstanding, 10,000,000 preferred shares authorized and no
preferred shares issued.
 
                                       68
<PAGE>   80
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                      NINE MONTHS ENDED SEPTEMBER 30, 1995
                                  (UNAUDITED)
 
                                   HISTORICAL
 
   
<TABLE>
<CAPTION>
                                                    CHEMEX                    ACCESS             PRO FORMA
                                             PHARMACEUTICALS, INC.     PHARMACEUTICALS, INC.      COMBINED
                                             ---------------------     ---------------------     ----------
<S>                                          <C>                       <C>                       <C>
Revenues
  Research and development
     Joint venture.........................       $   352,000                        --          $  352,000
     Sponsored.............................                --               $   575,000             575,000
  Sale of Amlexanox rights.................         2,500,000                        --           2,500,000
  Royalty..................................             7,000                        --               7,000
                                                   ----------                ----------          ----------
          Total revenues...................         2,859,000                   575,000           3,434,000
Expenses
  Research and development
     Joint venture.........................           578,000                        --             578,000
     Sponsored.............................                --                   341,000             341,000
     Proprietary...........................           553,000                   175,000             728,000
  General and administrative and
     other operating expenses..............           885,000                   482,000           1,367,000
  Professional fees -- related parties.....             6,000                     1,000               7,000
  Interest expense.........................                --                    50,000              50,000
                                                   ----------                ----------          ----------
                                                    2,022,000                 1,049,000           3,071,000
                                                   ----------                ----------          ----------
                                                      837,000                  (474,000)            363,000
Interest and dividend income...............            26,000                     4,000              30,000
                                                   ----------                ----------          ----------
Income (loss) before tax...................           863,000                  (470,000)            393,000
Provision for income taxes.................                --                        --                  --
                                                   ----------                ----------          ----------
Net income (loss) after tax................       $   863,000               $  (470,000)         $  393,000
                                                   ==========                ==========          ==========
Net income (loss) per common share.........       $      0.10               ($     0.04)         $     0.02
                                                   ==========                ==========          ==========
Average number of common and equivalent
  common shares outstanding (Note 2, 3)....         8,713,000                11,044,000          19,757,000
                                                   ==========                ==========          ==========
    
<FN> 
- ---------------
 
Notes to Pro Forma Combined Condensed Statement of Operations
 
Note 1: The above statement gives effect to the merger of Chemex and ACCESS,
        with ACCESS being the acquirer for accounting purposes, as if the merger
        had occurred on January 1, 1994.
 
Note 2: The average number of outstanding shares of ACCESS gives retroactive
        effect to the proposed exchange of 3.7744 shares of Chemex for each
        outstanding share of ACCESS.
 
Note 3: The pro forma combined-weighted average number of Common outstanding
        shares is based on the weighted average number of shares of Common Stock
        of Chemex outstanding during the period plus those shares to be issued
        in conjunction with the merger. A reconciliation between the Chemex's
        historical weighted average shares outstanding and pro forma weighted
        average shares outstanding is as follows:
</TABLE>

<TABLE>
            <S>                                                        <C>
            Historical...............................................   8,713,000
            ACCESS equivalent shares giving effect to the Merger.....  11,044,000
                                                                       ----------
                                                                       19,757,000
                                                                       ==========
</TABLE>
 
                                       69
<PAGE>   81
 
              PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS
                          YEAR ENDED DECEMBER 31, 1994
                                  (UNAUDITED)
 
                                   HISTORICAL
 
   
<TABLE>
<CAPTION>
                                                     CHEMEX                   ACCESS             PRO FORMA
                                              PHARMACEUTICALS, INC.    PHARMACEUTICALS, INC.     COMBINED
                                              ---------------------    ---------------------    -----------
<S>                                           <C>                      <C>                      <C>
Revenues
  Sale of proprietary rights................       $ 1,700,000                       --         $ 1,700,000
  Research and development
     Joint venture..........................         1,371,000                       --           1,371,000
     Sponsored..............................                --              $   439,000             439,000
  Option income.............................                --                  600,000             600,000
  Royalty...................................            26,000                       --              26,000
                                                    ----------              -----------         -----------
          Total revenues....................         3,097,000                1,039,000           4,136,000
Expenses
  Research and development
     Joint venture..........................         2,438,000                       --           2,438,000
     Sponsored..............................                --                  248,000             248,000
     Proprietary............................           153,000                  466,000             619,000
  General and administrative and
     other operating expenses...............         1,381,000                  787,000           2,168,500
  Professional fees -- related parties......            27,000                    4,000              31,000
  Amortization of stock awards..............           122,000                       --             122,000
  Interest expense..........................                --                   19,000              19,000
                                                    ----------              -----------         -----------
                                                     4,121,000                1,524,000           5,645,000
                                                    ----------              -----------         -----------
                                                    (1,024,000)                (485,000)         (1,509,000)
Interest and dividend income................            65,000                    9,000              74,000
                                                    ----------              -----------         -----------
Net loss before tax.........................          (959,000)                (476,000)         (1,435,000)
Provision for income taxes..................                --                       --                  --
                                                    ----------              -----------         -----------
Net loss after tax..........................       ($  959,000)             ($  476,000)        ($1,435,000)
                                                    ==========              ===========         ===========
Net loss per common share...................       ($     0.11)             ($     0.04)        ($     0.07)
                                                    ==========              ===========         ===========
Average number of common and equivalent
  common shares outstanding (Note 2,3)......         8,543,000               11,015,000          19,558,000
                                                    ==========              ===========         ===========
    
<FN> 
- ---------------
 
Notes to Pro Forma Combined Condensed Statement of Operations
 
Note 1: The above statement gives effect to the merger of Chemex and ACCESS,
        with ACCESS being the acquirer for accounting purposes, as if the
        transaction had occurred on January 1, 1994. If the Merger had occurred
        on January 1, 1994, the combined company would have reflected an
        additional one time nonrecurring charge of $8,190,000 representing the
        write off of the excess purchase price and related costs over the fair
        market value of Chemex's assets as of January 1, 1994.
 
Note 2: The average number of outstanding shares of ACCESS gives retroactive
        effect to the proposed exchange of 3.7744 shares of Chemex for each
        outstanding share of ACCESS.
</TABLE>
 
                                       70
<PAGE>   82
Note 3: The pro forma combined-weighted average number of common outstanding
        shares is based on the weighted average number of shares of Common Stock
        outstanding during the period plus those shares to be issued in
        conjunction with the merger. A reconciliation between Chemex's
        historical weighted average shares outstanding and pro forma weighted
        average shares outstanding is as follows:
 
<TABLE>
        <S>                                                                <C>
        Historical.......................................................   8,543,000
        ACCESS equivalent shares giving effect to the Merger.............  11,015,000
                                                                           ----------
                                                                           19,558,000
                                                                            =========
</TABLE>
 
                              MANAGEMENT -- ACCESS
 
<TABLE>
<CAPTION>
                         NAME                           AGE        POSITION HELD WITH ACCESS
- ------------------------------------------------------  ---   ------------------------------------
<S>                                                     <C>   <C>
David F. Ranney, M.D..................................  52    Chairman of the Board of Directors,
                                                              Executive Vice President
Kerry P. Gray.........................................  42    President, Chief Executive Officer,
                                                              Director
</TABLE>
 
     David F. Ranney, M.D., Founder and Chairman of the Board of Directors since
inception, has been Executive Vice President since August 1995 and Vice
President, Research and Development since June 1993. Previously, he was
President and Chief Executive Officer of ACCESS since founding ACCESS in March
1988. Until November 1989, Dr. Ranney directed the Laboratory of Targeted
Diagnosis and Therapy at the University of Texas Southwestern Medical Center,
where he held a joint faculty appointment in Radiology and Pathology. Dr. Ranney
received a B.A. degree in Chemistry from Oberlin College and an M.D. from Case
Western Reserve Medical School. He has postdoctoral training in Biochemistry
(Case Western Reserve), Cardiovascular and Microvascular Surgery (Stanford
University Medical Center), Immunology and Cancer Biology (NIH), and Pathology
(University Of Texas Southwestern Medical Center). Dr. Ranney has published
multiple articles on Targeting Controlled Drug Delivery and is a member of the
American Association of Pharmaceutical Scientists and the American Association
of Pathologists.
 
     Kerry P. Gray, has been President and Chief Executive Officer and Director
of ACCESS since June 1993. Previously, Mr. Gray served as Vice President and
Chief Financial Officer of PharmaSciences, Inc., a company he co-founded to
acquire technologies in the drug delivery area. From May 1990 to August 1991,
Mr. Gray was Senior Vice President, Americas, Australia and New Zealand of
Rhone-Poulenc Rorer, Inc. Prior to the Rorer/Rhone Poulenc merger, he had been
Area Vice President Americas of Rorer International Pharmaceuticals. Previously,
from January 1986 to May 1988, he was Vice President, Finance of Rorer
International Pharmaceuticals, having served in that same capacity for the
Revlon Health Care Group of companies before their acquisition by Rorer Group.
Between 1975 and 1985, he held various senior financial positions in Revlon
Health Care Group. Mr. Gray's experience in the pharmaceutical industry totals
20 years.
 
                        EXECUTIVE COMPENSATION OF ACCESS
 
     The following table sets forth the aggregate compensation paid by ACCESS to
each of the most highly compensated executive officers of ACCESS for the year
ended December 31, 1994.
 
<TABLE>
<CAPTION>
                                                                                  LONG-TERM
                                                                             COMPENSATION AWARDS
                                                                         ---------------------------
                                                ANNUAL COMPENSATION      SECURITIES
                                                --------------------     UNDERLYING      ALL OTHER
         NAME AND PRINCIPAL POSITION             SALARY       BONUS      OPTIONS(2)     COMPENSATION
- ----------------------------------------------  --------     -------     ----------     ------------
<S>                                             <C>          <C>         <C>            <C>
David F. Ranney, M.D..........................  $145,000     $     0             0        $  7,500(1)
Chairman of the Board and Executive Vice
  President
Kerry P. Gray.................................  150,000..    150,000             0         150,000
President and CEO
<FN> 
- ---------------
(1) Pursuant to Dr. Ranney's Patent Purchase Agreement dated April 4, 1994, Dr.
    Ranney was paid $7,500.
</TABLE>
 
                                       71
<PAGE>   83

(2) In 1995, options were granted to the employees for the period 1993-95,
    compensation for deferral of salary increase and bonus payments. Mr. Gray
    and Dr. Ranney were granted 130,000 and 100,000 options respectively.
 
OPTIONS/SARS EXERCISES AND YEAR-END VALUE TABLE
 
     During 1994, no options were exercised by the named executive officers of
ACCESS.
 
                       AGGREGATED OPTION/SAR EXERCISES IN
                  LAST FISCAL YEAR AND FY-END OPTION/SAR VALUE
 
<TABLE>
<CAPTION>
                                                                    NUMBER OF
                                                                   SECURITIES                     VALUE OF
                                                                   UNDERLYING                   UNEXERCISED
                                                                   UNEXERCISED                  IN-THE-MONEY
                                                                 OPTIONS/SARS AT              OPTIONS/SARS AT
                      SHARES ACQUIRED                          FISCAL YEAR-END(#)            FISCAL YEAR-END($)
        NAME          ON EXERCISE(#)    VALUE REALIZED($)   EXERCISABLE/UNEXERCISABLE   EXERCISABLE/UNEXERCISABLE(1)
- --------------------  ---------------   -----------------   -------------------------   ----------------------------
<S>                   <C>               <C>                 <C>                         <C>
Kerry Gray..........           --               --                50,000/100,000                           --
<FN> 
- ---------------
(1) All of Mr. Gray's options have an exercise price of $0.25 and are thus
    "out-of-the-money."
</TABLE>
 
EMPLOYMENT AGREEMENT
 
     Kerry Gray.  Pursuant to a Letter Agreement dated June 30, 1993 (the "Gray
Agreement"), ACCESS agreed to pay Mr. Gray a starting monthly salary of $12,500
which is to be increased to $14,583.33 if successful sufficient funding (by any
means) is obtained. Pursuant to the Gray Agreement, Mr. Gray's salary will be
reviewed by the Board of Director's Audit or Compensation Committee every
eighteen months. The Gray Agreement also provided for the grant of 150,000
options (subject to certain anti-dilution protections) on the start date of Mr.
Gray's employment with ACCESS which options are subject to vesting contingent
upon the successful completion of certain financings. The Gray Agreement also
provides for coverage of Mr. Gray under ACCESS' Medical Insurance Plan, a life
insurance policy ($20,000) and disability and additional term life insurance
coverage (up to $3,000 in premiums per year).
 
                                       72
<PAGE>   84
 
                    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL
                        OWNERS AND MANAGEMENT -- ACCESS
 
     The following table sets forth as of September 30, 1995 information
concerning the beneficial ownership of ACCESS Common Stock and information
concerning beneficial ownership of Chemex Common Stock if the Merger is
consummated by: (i) those persons known to ACCESS to own beneficially 5% or more
of its outstanding common stock; (ii) each director of ACCESS; (iii) each of the
Named Executive Officers of ACCESS; and (iv) all directors and officers as a
group.
 
<TABLE>
<CAPTION>
                                                                           AMOUNT, NATURE AND
                                             AMOUNT, NATURE AND         PERCENTAGE OF BENEFICIAL
                                          PERCENTAGE OF BENEFICIAL     OWNERSHIP OF CHEMEX COMMON
                                         OWNERSHIP OF ACCESS COMMON      STOCK IF THE MERGER IS
                 NAME                    STOCK BEFORE THE MERGER(1)          CONSUMMATED(1)
- ---------------------------------------  --------------------------    ---------------------------
<S>                                      <C>                 <C>        <C>                  <C>
David F. Ranney, M.D. .................   2,392,000          64.8%       9,028,364           40%
Yamanouchi Pharmaceutical Co., Ltd. ...     284,527           7.7%       1,073,918            5%
Kerry P. Gray..........................     280,000           7.6%       1,056,832            5%
Stephen B. Thompson....................      14,500              *          54,728             *
All Directors and Officers as a group
  (consisting of the 3 persons)........   2,686,500          72.8%      10,139,925           45%
<FN> 
- ---------------
 *  Less than 1%
 
(1) The person or entity listed above has sole voting and investment power with
    respect to Shares shown, unless otherwise indicated. The Shares shown as
    beneficially owned also include shares representing options to purchase
    ACCESS Common Stock that are currently exercisable or are exercisable within
    sixty days of September 30, 1995, computed on the basis of a Conversion
    Number of 3.7744 of Chemex Common Stock for each share of ACCESS Common
    Stock.
</TABLE>
 
            CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS -- ACCESS
 
     On April 5, 1994 a Patent Purchase Agreement, which terminated a previous
License Agreement, between ACCESS and Dr. David Ranney, was executed. This
provided for the assignment of the rights to the original patents to ACCESS.
 
     Under the terms of the Patent Purchase Agreement Dr. David Ranney has
retained certain rights and interests in the intellectual property which are
subject to further modification at the Effective Time as provided in the
Stockholder's Agreement, including a non-exclusive right to use the inventions
and technology covered by or relating to the patents for his own research,
teaching or other academic related purposes, and after he is no longer a
full-time employee of ACCESS for research and development of uses or
implementations of the inventions and technology improvements. ACCESS maintains
the first right to negotiate the acquisition of any new inventions or technology
improvements developed by Dr. David Ranney relating to the technology. ACCESS
has agreed to pay Dr. David Ranney a royalty of three quarters of one percent
(0.75%) of ACCESS gross revenues derived from products covered by the patents
and to pay certain minimum payments which began in 1994, and which are subject
to further modification at the Effective Time.
 
     In addition the Patent Purchase Agreement as amended subject to the closure
of the Merger, establishes certain additional rights of Dr. David Ranney. The
patent assignment will terminate in the event ACCESS fails to pay the amounts
due to Dr. David Ranney pursuant to the Agreement, files a petition in
bankruptcy, fails to commercially develop the patents or creates a security
interest in the patents without Dr. David Ranney's approval. Also, in the event
that parts of the ACCESS technology are not being developed four years after the
Merger Dr. David Ranney has the right of first refusal to license or acquire at
fair market value development rights to such parts of the ACCESS technology.
 
     Dr. David Ranney has signed an Assignment of Intellectual Property
Agreement whereby all rights, title and interest in and to all subsequent
inventions and confidential information will become the sole and exclusive
property of ACCESS at the earlier of the date of conception or development,
while he remains an
 
                                       73
<PAGE>   85
 
employee of ACCESS and for a period of two years after he ceases employment for
inventions related to the ACCESS technology.
 
     On March 7, 1991 Yamanouchi Pharmaceutical Co., Ltd. entered into an Option
Agreement to license one product candidate in the field of MRI contrast agents
and one product candidate in the field of ultrasound contrast agents. The option
territory is Japan, China and other specified Asian countries. In a letter dated
March 11, 1994 Yamanouchi declined to exercise the option for MRI.
 
                      DESCRIPTION OF ACCESS CAPITAL STOCK
 
   
     Under ACCESS' Certificate of Incorporation, as amended, ACCESS is
authorized to issue up to 10,000,000 shares of ACCESS Common Stock, and
1,000,000 shares of ACCESS Preferred Stock. As of the Record Date, there were
2,925,983 shares of Common Stock issued and outstanding and no shares of
Preferred Stock issued and outstanding.
    
 
COMMON STOCK
 
     The holders of Common Stock are entitled to one vote for each share of such
stock held of record by them. The holders of Common Stock are entitled to
receive dividends when, as and if declared by the Board of Directors out of
funds legally available therefor, subject to the prior rights of the holders of
outstanding Preferred Stock of which there is none outstanding. Upon the
liquidation or dissolution of ACCESS, holders of ACCESS Common Stock are
entitled to receive all assets available for distribution to Stockholders, after
payment of creditors and preferential liquidation distributions to preferred
Stockholders. The ACCESS Common Stock has no preemptive or other subscription
rights or redemption or sinking fund provisions with respect to such shares. All
outstanding shares of Common Stock are fully paid and nonassessable.
 
PREFERRED STOCK
 
     The Board of Directors of ACCESS is authorized, subject to any limitations
prescribed by law without further stockholder approval, to issue from time to
time up to an aggregate of 1,000,000 shares of ACCESS Preferred Stock. ACCESS
Preferred Stock shall have such number of shares, designations, preferences,
voting powers, qualifications and special or relative rights or privileges,
which may include, among others, dividend rights, voting rights, redemption and
sinking fund provisions, liquidation preferences and conversion rights, as shall
be determined by the Board of Directors in a resolution or resolutions providing
for the issuance of such series. ACCESS Preferred Stock, if so determined by the
Board of Directors, may have full voting rights with the Common Stock or
superior or limited voting rights, and may be convertible into Common Stock or
another security of ACCESS. ACCESS has no present plans to issue any shares of
Preferred Stock.
 
DESCRIPTION OF WARRANTS
 
     Under the terms of the 1994 master lease agreement for financing $426,432
existing laboratory, furniture and office equipment, Aberlyn Capital Management
Limited Partnership received a warrant to purchase 35,536 shares of common
stock. The warrant remains exercisable for seven years from the date of issuance
and will expire on September 19, 2001. The warrant is exercisable at $2.00 per
share. The warrant may be adjusted under some conditions, as defined, for
dividends, changes in stock price, reorganization, consolidation or merger and
extraordinary events.
 
     Under terms of agreement, a private investor received a warrant to purchase
12,500 shares of Common Stock. The warrant remains exercisable for four years
from the date of issuance and will expire on October 5, 1999. The warrant is
exercisable at $2.00 per share.
 
                                       74
<PAGE>   86
 
   
                           COMPARATIVE PER SHARE DATA
    
 
   
     The following tabulation reflects the historical net income per share of
Chemex's Common Stock and the historical net income per share of ACCESS Common
Stock in comparison with the pro forma combined net income for the merged
companies. The following should be read in conjunction with the pro forma
financial information contained elsewhere herein.
    
 
   
<TABLE>
<CAPTION>
                                                                                   NINE MONTHS
                                                                  YEAR ENDED          ENDED
                                                                 DECEMBER 31,     SEPTEMBER 30,
                                                                     1994             1995
                                                                 ------------     -------------
    <S>                                                          <C>              <C>
    NET INCOME PER SHARE
    Chemex Historical..........................................     $(0.11)          $ (0.10)
    ACCESS Historical(1).......................................     $(0.04)          $ (0.04)
    Combined Pro Forma.........................................     $(0.07)          $  0.02
    
<FN> 
- ---------------
 
   
(1) Gives effect to the exchange of 3.7744 shares of Chemex Common Stock for
    each share of ACCESS Stock.
    
</TABLE>
 
   
                              BOOK VALUE PER SHARE
    
 
   
     The following tabulation reflects the historical book value per share of
Chemex Common Stock and the historical book value per share of ACCESS Common
Stock in comparison with the pro forma combined book value per share for the
merged companies. The following should be read in conjunction with the pro forma
financial information contained elsewhere herein.
    
 
   
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,    SEPTEMBER 30,
                                                                      1994            1995
                                                                  ------------    -------------
    <S>                                                           <C>             <C>
    BOOK VALUE PER SHARE
    Chemex Historical...........................................     $ 0.15           $0.25
    ACCESS Historical(1)........................................     $ 0.05           $0.02
    Combined Pro Forma..........................................     $ 0.08           $0.10
    
<FN> 
- ---------------
 
   
(1) Gives effect to the exchange of 3.7744 shares of Chemex Common Stock for
    each share of ACCESS Stock.
    
</TABLE>
 
                                       75
<PAGE>   87
 
                              MANAGEMENT -- CHEMEX
 
                        DIRECTORS AND EXECUTIVE OFFICERS
 
  Before the Consummation of the Merger
 
<TABLE>
<CAPTION>
    NAME                                        AGE            POSITION HELD WITH CHEMEX
    ------------------------------------------  ---    ------------------------------------------
    <S>                                         <C>    <C>
    Mr. Herbert H. McDade, Jr.................  68     Chairman of the Board of Directors,
                                                       Chief Executive Officer, President and
                                                       Treasurer/Principal Financial Officer
    Mr. Vernon Taylor III.....................  48     Director
    Mr. J. Michael Flinn......................  61     Director
    Charles G. Smith, Ph.D....................  67     Director
    Mrs. Elizabeth M. Greetham................  46     Director
    Mr. Paul P. Woolard.......................  71     Director
    Mr. Sandford D. Smith.....................  47     Director
</TABLE>
 
     The Board of Directors of Chemex is divided into three classes. Members of
each class serve a term of three years until the respective annual meeting of
stockholders and election and qualification of their successors. Messrs. Taylor
and Woolard and Mrs. Greetham are Class 1 Directors whose term expires in 1995
and are nominees for election at the Special Meeting (see "Election of
Directors"); Messrs. Smith and Smith are Class 2 Directors whose terms will
expire in 1996; and Messrs. Flinn and McDade are Class 3 Directors whose terms
will expire in 1997. Each officer of the Company is selected by the Board of
Directors for a term of one year. There is no family relationship among any of
the Directors or Executive Officers.
 
  After the Consummation of the Merger
 
     At the Effective Time and after the Merger, Kerry P. Gray, Dr. David Ranney
and one other person selected by ACCESS will become directors of Chemex and
Kerry P. Gray will become Chief Executive Officer and President of Chemex, Dr.
David Ranney the Executive Vice President of Chemex and Herbert H. McDade, Jr.
will become the Chairman of the Board of Directors of Chemex. In addition, at
the Effective Time, Vernon Taylor III, Charles G. Smith, Sandford D. Smith and
Paul P. Woolard will cease to be directors of Chemex and one additional director
will be selected jointly by ACCESS and Chemex. See "The Proposed
Merger -- Effects of the Merger -- Officers and Directors of the Surviving
Corporation." Information regarding ACCESS' executive officers and directors,
including those who will serve as executive officers and directors of Chemex
following the consummation of the Merger is set forth at "Management -- ACCESS."
 
BUSINESS AND EXPERIENCE OF DIRECTORS AND EXECUTIVE OFFICERS
 
     For the business and experience of Mrs. Greetham and Messrs. Taylor and
Woolard, see "Election of Directors."
 
     Mr. Herbert H. McDade, Jr. was elected a Director in January 1988. In
February 1989, he was elected Vice-Chairman of the Board of Directors and Chief
Executive Officer of the Company. In June 1989, he was appointed Chairman of the
Board of Directors and Treasurer in addition to his responsibilities as Chief
Executive Officer, and in May 1990 he assumed the position of President of the
Company. He is also a member of the Executive Committee of the Board of
Directors. He is currently President and Chief Executive Officer of the Thoma
Corporation, a closely-held health care consulting company. In addition, he is
the Chairman of the Board of Directors of CytRx Corporation. He also served on
the Board of Directors of Access Pharmaceuticals, Inc. from January 1989 until
July 1995. In addition, he has served on the board of directors of Shaman
Pharmaceutical Co., Vaxcel Inc. and Clarion Pharmaceuticals, Inc. From 1986 to
1987 he served as Chairman of the Board of Directors and President of Armour
Pharmaceutical Co., a wholly-owned subsidiary of Rorer Group, Inc. Prior to 1986
he served for approximately 13 years in various executive positions at Revlon,
Inc., including President of the International Division of the Revlon Health
Care Group from 1979 to 1986. He was also previously associated in various
executive capacities with The Upjohn
 
                                       76
<PAGE>   88
 
Company for twenty years. Mr. McDade received his undergraduate degree from
Notre Dame University and his graduate degree from Laval University in Quebec.
 
     Mr. J. Michael Flinn has served as a Director of the Company since 1983. He
also is a member of the Audit & Finance Committee of the Board of Directors.
Since 1970 he has been an investment counselor. He is a principal with the
investment counseling firm of Sirach Capital Management, Inc. He assists in the
management of pension, profit sharing, individual, corporate and foundation
accounts totaling over $4.5 billion.
 
     Dr. Charles G. Smith has served as a Director since March 1986. For the
past four years. he has been an independent, self-employed consultant to the
health care industry. Since 1988, Dr. Smith has also served on the Board of Dura
Pharmaceuticals, Inc. He was formerly Vice President of the Research and
Development Division of the Revlon Health Care Group from 1977 to 1986 and held
other executive positions with Revlon beginning in 1973. Dr. Smith holds a Ph.D.
in Biochemistry from the University of Wisconsin. He is a member of the American
Chemical Society, the Federation of American Societies of Experimental Biology
and the American Association for Cancer Research, Inc. Dr. Smith has published
43 scientific papers and has authored a book in the field of drug discovery.
 
     Mr. Sandford D. Smith is currently President and Chief Executive Officer of
Repligen Corporation, a biotechnology company located in Cambridge,
Massachusetts. Previously, Mr. Smith was with Bristol-Myers Squibb for ten
years, most recently holding the position of Vice President, Business
Development and Strategic Planning, U.S. Pharmaceutical and Nutritional Group.
Mr. Smith, who received his undergraduate degree from the University of Denver,
is a member of the Board of Directors of Ariad Pharmaceuticals and CSP, Inc.
 
                        EXECUTIVE COMPENSATION -- CHEMEX
 
     The following table sets forth the aggregate compensation paid by Chemex to
each of the most highly compensated executive officers of Chemex whose aggregate
salary and bonus exceeded $100,000 for services rendered in all capacities to
Chemex for the years ended December 31, 1994, 1993 and 1992.
 
<TABLE>
<CAPTION>
                                                                            LONG-TERM COMPENSATION
                                                                                    AWARDS
                                            ANNUAL COMPENSATION      ------------------------------------
  NAME AND                               -------------------------   SECURITIES UNDERLYING    ALL OTHER
  PRINCIPAL POSITION                     YEAR   SALARY(1)   BONUS      OPTIONS/SARS (#)      COMPENSATION
  -------------------------------------  -----  --------   -------   ---------------------   ------------
  <S>                                    <C>    <C>        <C>       <C>                     <C>
  Herbert H. McDade, Jr................  1994   $131,714   $     0          226,829            $ 46,122(2)
  Chairman & CEO                         1993    174,000    62,500           50,000              60,371
                                         1992    174,000    62,500           65,000              61,724
  Atul S. Khandwala....................  1994   $153,960   $     0          107,715              19,620(4)
  Executive Vice President               1993    160,626    30,519           25,000              28,662(3)
                                         1992    154,677    25,000           36,250              39,641
  Leonard F. Stigliano.................  1994   $156,960   $     0           96,877            $ 19,620(4)
  Vice President, Finance                1993    156,420    29,822           25,000              20,139(4)
                                         1992    144,000    25,000           36,250              18,750(4)
<FN> 
- ---------------
(1) These amounts are prior to reduction for deferred employer contributions
    under Chemex's Employee Stock Ownership Plan ("ESOP") pursuant to Section
    401(k) of the Internal Revenue Code of 1986, as amended (the "Code").
 
(2) Pursuant to Mr. McDade's employment agreement, Mr. McDade was reimbursed for
    certain expenses. In 1994, he was reimbursed for life insurance payments
    ($23,000) and auto allowance ($6,000) and auto insurance reimbursement
    ($658). In addition, Chemex made ESOP contributions in stock of $16,464.
 
(3) Represents Chemex ESOP contributions in stock of $20,560 and relocation
    expenses of $8,102.
 
(4) Represents Chemex ESOP contributions made in stock.
</TABLE>
 
                                       77
<PAGE>   89
 
OPTIONS/SAR GRANTS IN 1994
 
     The following table provides information regarding stock options granted to
the named executive officers during 1994.
 
                     OPTION/SAR GRANTS IN LAST FISCAL YEAR
                              INDIVIDUAL GRANTS(1)
 
<TABLE>
<CAPTION>
                                                               % OF TOTAL
                                                              OPTIONS/SARS
                                    NUMBER OF SECURITIES       GRANTED TO
                                         UNDERLYING        EMPLOYEES IN FISCAL
NAME                                    OPTIONS/SARS              YEAR           EXERCISE PRICE   EXPIRATION DATE
- ----------------------------------  --------------------   -------------------   --------------   ---------------
<S>                                        <C>                     <C>               <C>              <C>
H. McDade, Jr.....................         125,000                 24%               $ .875           4/29/04-
                                           101,829                 20%                0.00            7/29/04
A. Khandwala......................          46,715                  9%                 .875           4/29/04-
                                                                                                       7/29/04
                                            61,000                 12%                0.00           12/31/04
L. F. Stigliano...................          35,877                  7%                 .875            7/29/04
                                            61,000                 12%                0.00           12/31/04
<FN> 
- ---------------
(1) Vesting for all options granted in 1994 were based on performance criteria
    relating to the successful completion of the following: in exchange for a
    salary reduction of one year (McDade and Khandwala), and an equity financing
    or sale of Chemex (McDade, Khandwala, and Stigliano).
</TABLE>
 
OPTIONS/SARS EXERCISES AND YEAR-END VALUE TABLE
 
     During 1993, Messrs. A. Khandwala and L. Stigliano each exercised 25,000
SARs. This table includes the number of shares covered by both exercisable and
non-exercisable stock options/SARs as of December 31, 1994. Also reported are
the values for "in-the-money" stock options/SARs which represent the positive
spread between the exercise price of any such existing stock options/SARs and
the year-end price of Chemex's Common Stock.
 
           AGGREGATED OPTION/SAR EXERCISES IN LAST FISCAL YEAR AND FY
                              END OPTION/SAR VALUE
 
<TABLE>
<CAPTION>
                                                                  NUMBER OF SECURITIES
                                                                       UNDERLYING             VALUE OF UNEXERCISED
                                                                       UNEXERCISED                IN-THE-MONEY
                                                                     OPTIONS/SARS AT             OPTIONS/SARS AT
                                                                   FISCAL YEAR-END (#)         FISCAL YEAR-END($)
                       SHARES ACQUIRED ON                       -------------------------   -------------------------
NAME                      EXERCISE (#)      VALUE REALIZED($)   EXERCISABLE/UNEXERCISABLE   EXERCISABLE/UNEXERCISABLE
- ---------------------  ------------------   -----------------   -------------------------   -------------------------
<S>                    <C>                  <C>                 <C>                         <C>
H. McDade, Jr........          --                  --                193,337/296,667             $29,154/$56,520
A. Khandwala.........          --                  --                153,916/115,049                $563/$33,750
L.F. Stigliano.......          --                  --                 48,924/135,326              $1,036/$33,908
</TABLE>
 
EMPLOYMENT AGREEMENTS
 
     Mr. Herbert H. McDade, Jr.  Effective February 1, 1989, Chemex and Mr.
McDade entered into an employment agreement, as amended (the "McDade
Agreement"), which provides that he will serve as the Chief Executive Officer of
Chemex and Vice Chairman or Chairman of the Board of Directors. The McDade
Agreement was amended, effective June 25, 1991, to provide for a term ending
June 30, 1994 and in 1994, was extended to June 30, 1995. The annual base salary
during the term of the McDade Agreement was a minimum of $150,000 per year,
subject to increase by the Board of Directors. Mr. McDade is eligible to
participate in all Company employee benefit and welfare programs available to
executives. Chemex also pays insurance premiums on $1 million of life insurance
payable to his estate, medical expense coverage for Mr. McDade and his spouse
and long-term disability coverage for Mr. McDade. The McDade Agreement provided
that, upon termination, a cash severance payment equal to one year's salary
shall be paid if Mr. McDade is terminated by Chemex without cause and a cash
severance payment equal to two years' salary shall be paid if he terminates his
employment for good reason.
 
     Pursuant to the McDade Agreement and in accordance with Chemex's 1987 Stock
Awards Plan, Chemex granted to Mr. McDade (i) on February 1, 1989 options (the
"February Options") for the purchase of 50,000 shares of common stock, and (ii)
on December 31, 1989 options (the "December Options") for the
 
                                       78
<PAGE>   90
 
   
purchase of 37,500 shares of common stock, upon vesting and payment of the
exercise price. The February Options and December Options are referred to
collectively herein as the "New Options." On July 31, 1991, Mr. McDade exchanged
87,500 previously granted options for 80,625 New Options. The New Options are
identical to the exchanged options, except that the New Options have a lower
exercise price. All of the New Options have vested. On March 31, 1992, Mr.
McDade was granted 65,000 options at market value, which have vested as of
December 31, 1994. On July 29, 1993, Mr. McDade was granted 50,000 options at
market value which vest based on certain performance criteria. On April 29,
1994, Mr. McDade voluntarily accepted a salary reduction of approximately
$64,000 on an annualized basis. In exchange for this salary reduction, Mr.
McDade was granted 75,000 options at market value, to vest in one year from the
date of the grant. On July 29, 1994, Mr. McDade was granted 50,000 options at
market value, which vest based on certain performance criteria, none of which
have vested to date. On December 31, 1994, Mr. McDade was granted 101,829 SARs
with 0 base value or exercise price, based on certain performance criteria. Upon
Mr. McDade's termination of employment (other than termination by Chemex for
cause or by Mr. McDade without good reason), all options shall immediately vest
and become exercisable. In addition, all Options become immediately exercisable
upon a change in control of Chemex. Mr. McDade also holds 17,550 vested options
for the purchase of common stock granted pursuant to the Non-Employee Directors
Stock Option Plan. Mr. McDade has the right to request (subject to certain
limitations by the underwriters) that all shares of common stock which he owns
or may acquire in the future be included in registration statements of Company
securities filed with the Securities and Exchange Commission.
    
 
     The McDade Agreement also contains a provision for stock appreciation
rights ("SARs") pertaining to 50,000 shares of common stock with a zero base
value or exercise price. All of the stock appreciation rights have vested.
Appreciation on SARs is to be paid in shares of common stock; as of December 31,
1991, Mr. McDade has waived his right under the provision of the 1987 Stock
Awards Plan to request the Board to authorize a cash payment for any SARs he
elects to exercise.
 
     In addition, in consideration for the termination of his employment with
Chemex and for an agreement by Mr. McDade to forfeit severance pay equal to
approximately two years of his base salary which he would otherwise be entitled
to receive on a change in control of Chemex pursuant to the McDade, conditioned
upon the consummation of the merger Mr. McDade and Chemex have entered into an
agreement on October 4, 1995 pursuant to which, among other things, (i) Mr.
McDade will become a consultant to Chemex, providing consulting services, to
Chemex at least four days each month and will be paid a base of $1,500 per day
of consulting; (ii) Chemex will use its best efforts to retain Mr. McDade's
enrollment under its healthcare plan and (iii) the period for exercise for all
options and SARS owned by Mr. McDade will be extended from three months after
the termination of his employment with Chemex to the expiration of the option of
SAR. See "Security Ownership of Certain Beneficial Owners and Management" for
both Chemex and ACCESS.
 
     Severance Agreement -- Atul Khandwala.  With the cessation of all of
Chemex's research and development operations on July 31, 1995 (See "Business of
Chemex") Management determined that the services of Mr. Khandwala, Executive
Vice President of Chemex, were no longer needed by Chemex. By a Letter Agreement
dated August 18, 1995, Chemex agreed to (i) pay to Mr. Khandwala severance equal
to six months of his annual salary (approximately $80,313) reduced by applicable
taxes; (ii) extend the period for exercise of Mr. Khandwala's options and SARs
for the purchase of Chemex Common Stock from three months after the date of the
termination of Mr. Khandwala's employment with Chemex to the expiration date of
the options and SARs (See "Summary Compensation Table" and "Options/SARs
Exercises and Year-End Value Table"); (iii) pay Mr. Khandwala, promptly after
the approval by the Chemex stockholders of the sale of Amlexanox to Block,
approximately $9,846 for accrued but unused vacation time; and (iv) provide Mr.
Khandwala with medical insurance for three months.
 
DIRECTOR COMPENSATION
 
     Each Director who is not an employee of Chemex receives the sum of $500 for
each meeting of the Board of Directors attended. Each Director who is not an
employee of Chemex but is a member of the Executive Committee or the Audit and
Finance Committee received the sum of $400 for each committee meeting attended.
 
                                       79
<PAGE>   91
 
                    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL
                        OWNERS AND MANAGEMENT -- CHEMEX
 
     The following table sets forth beneficial ownership of Chemex Common Stock
as of September 30, 1995 by all Directors and named executive officers of the
Company and all Directors and Executive Officers as a group, and all owners of
5% or more of the Chemex's Common Stock and does not take into account the
proposed Merger:
 
<TABLE>
<CAPTION>
                                                                 COMMON STOCK BENEFICIALLY OWNED
                                                               ------------------------------------
                            NAME                               NUMBER OF SHARES(1)       % OF CLASS
- -------------------------------------------------------------  -------------------       ----------
<S>                                                            <C>                       <C>
Herbert H. McDade. Jr........................................         289,157(2)             2.1%
Sandford D. Smith............................................           6,667(3)              .1
Charles G. Smith, Ph.D.......................................         102,458(4)              .8
Vernon Taylor III............................................         412,671(5)             3.1
J. Michael Flinn.............................................          68,791(6)              .5
Atul S. Khandwala, Ph.D......................................         232,653(7)             1.8
Leonard F. Stigliano.........................................         123,080(8)             1.0
Paul P. Woolard..............................................          23,800(9)              .2
Elizabeth M. Greetham........................................          21,067(10)             .2
David Blech and Affiliates...................................       2,275,700(11)           17.2
All Directors and Executives Officers as a group (consisting
  of the
  9 persons named above).....................................       1,280,344                9.7%
<FN> 
- ---------------
 (1) Includes common stock outstanding plus all options exercisable within 60
     days after September 30, 1995. Unless otherwise indicated, the persons
     listed have sole voting and investment powers with respect to all such
     shares.
 
 (2) Including presently exercisable options for the purchase of 17,550 shares
     of common stock pursuant to the Non-Employee Director Plan, and 141,508
     shares of common stock and 51,829 SARs exercisable pursuant to the 1987
     Stock Option Plan and 69,270 shares issued in connection with the ESOP.
 
 (3) Including presently exercisable options for the purchase of 5,000 shares of
     common stock pursuant to the Non-Employee Director Plan.
 
 (4) Including presently exercisable options for the purchase of 51,375 shares
     of common stock pursuant to the Non-Employee Director Plan and 333 shares
     issuable upon the exercise of warrants.
 
 (5) As of September 30, 1995, Mr. Taylor is the owner of record of 227,460
     shares and 1,500 shares owned of record by Mr. Taylor's minor son, over
     which he has sole voting and investment power. Also included are 61,047
     shares which Mr. Taylor has the present right to acquire under the 1987
     Stock Option Plan, 77,664 shares issuable upon the exercise of warrants,
     and 30,000 shares issuable upon the exercise of options to purchase 12,500
     units consisting of one share of common stock, one warrant, and 4/10 of a
     warrant. Lastly, includes 15,000 exercisable options for the purchase of
     shares of common stock pursuant to Non-Employee Director Plan.
 
 (6) Including presently exercisable options for the purchase of 56,125 shares
     of common stock pursuant to the Non-Employee Director Plan, and 3,166
     shares issuable upon the exercise of warrants.
 
 (7) Including presently exercisable options for the purchase of 152,916 shares
     and 1,000 SARs pursuant to the 1987 Stock Option Plan and 76,737 shares
     issued in connection with the ESOP.
 
 (8) Including presently exercisable options for the purchase of 47,082 shares
     and 1,842 SARs pursuant to the 1987 Stock Option Plan, and 44,156 shares
     issued in connection with the ESOP.
 
 (9) Including presently exercisable options for the purchase of 13,400 shares
     of common stock pursuant to the Non-Employee Director Plan.
 
(10) Including presently exercisable options for the purchase of 15,067 shares
     of common stock pursuant to the Non-Employee Director Plan.
</TABLE>
 
                                       80
<PAGE>   92

(11) Sentinel Charitable Remainder Trust ("Sentinel"), 599 Lexington Avenue, New
     York, New York, is known to Chemex to be the beneficial owner of more than
     five percent of the Chemex Common Stock. Mr. David Blech is the direct and
     indirect owner of 1,075,700 shares of Chemex Common Stock which represents
     12.4% of the outstanding shares of Chemex Common Stock as of March 1, 1995.
     Of such shares, 5,000 (.06%) are owned directly by Mr. Blech, 1,020,000
     (11.75%) are owned by Sentinel, 25,950 (.30%) are owned by Lake Charitable
     Remainder Trust and 24,750 (:29%) are owned by Ocean Charitable Remainder
     Trust, Mr. Blech is the sole income beneficiary of the trusts, and as such
     may be deemed to be the beneficial owner of the securities held by them.
     Mr. Nicholas Madonia is the trustee of the trusts and as such may be deemed
     to be a beneficial owner of the securities held by them.
 
   
          In addition to the 1,020,000 shares of Common Stock held by Sentinel,
     Sentinel additionally has an option to purchase until July 31, 1996, up to
     500,000 units at $2.50 per unit. The units consist of 500,000 shares of
     Common Stock, 500,000 warrants with an expiration date of July 31, 1997 and
     an exercise price of $6.25 and 200,000 Warrants with an expiration date of
     July 31, 1997 and an exercise price of $2.50; provided, however, that if
     the Chemex Stockholders approve the Merger Agreement, by the terms of the
     Letter Agreement the expiration date of the Units will be changed to
     January 1, 1999 and the expiration date of the Warrants will be changed to
     January 1, 2000. Assuming the exercise of all of the options and warrants
     described above, Mr. Blech would have a beneficial ownership interest in
     Chemex of 25.5 %. Information is based on Form 4 as filed by D. Blech in
     October 1994.
    
 
                                       81
<PAGE>   93
 
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
TRANSACTIONS WITH MANAGEMENT AND OTHERS
 
     Dr. Charles G. Smith.  Dr. Smith was elected a Director of the Company in
March 1986. Since January 1987 he has served as a pharmaceutical consultant to
the Company and has been responsible for introducing the Company to third
parties for both in-licensing and out-licensing of drug product candidates. In
October 1991, he entered into a two-year consulting agreement with the Company
for a minimum of two days of extended consulting services per month.
 
     During 1994, the Company paid Dr. Smith consulting fees of $26,950. On May
2, 1991 Dr. Smith assigned his proprietary and other interests in Amlexanox, a
drug compound currently under development by Chemex, in exchange for rights to
50,000 shares of the Company's Common Stock. Dr. Smith will vest in the
ownership of the shares upon Chemex's accomplishment of certain drug development
and regulatory approval milestones for Amlexanox. As of March 1, 1995, Dr. Smith
had vested rights in 16,666 of such shares.
 
     Mr. David Blech.  Mr. Blech became a financial consultant to the Company on
October 1, 1990. His contract terminated in 1991 and under the terms of the
agreement, the Company paid Mr. Blech $75,000 in 1991 and $25,000 in 1990. In
1992, Mr. Blech performed consulting services for the Company and the Company
paid him $50,000. In addition, the Company paid $25,000 to Mr. Blech in January
1995 for consulting services rendered.
 
   
     As of December 14, 1995, Chemex, D. Blech & Co., and Sentinel Remainder
Trust (each affiliates of Mr. Blech), entered into the Letter of Agreement which
provided that Sentinel Remainder Trust would forfeit its rights to
representation on the Board of Directors of Chemex in consideration of the
extension of the expiration date of (i) 500,000 Units exercisable in the
aggregate for 500,000 shares of Chemex Common Stock and Warrants exercisable in
the aggregate for 700,000 shares of Chemex Common Stock pursuant to the terms of
the Conversion Agreement from July 31, 1996 to January 1, 1999 and (ii) the
Warrants underlying the Units from July 31, 1997 to January 1, 2000. (See
"Description of Chemex's Capital Stock")
    
 
     Dr. David Ranney.  Dr. David Ranney, the Executive Vice President and a
director of ACCESS will, upon the consummation of the Merger, become a director
of Chemex and will beneficially own, immediately after the Effective Time,
approximately 9,028,364 shares of Chemex Common Stock pursuant to the exchange
of shares of ACCESS Common Stock for Chemex Common Stock pursuant to the terms
of the Merger Agreement. See "Management of ACCESS," "Security Ownership of
Certain Beneficial Owners and Management -- ACCESS," and "Management of Chemex."
Dr. David Ranney and Chemex have entered into, subject to the closing of the
transactions contemplated by the Merger Agreement, the Stockholder's Agreement
providing for, among other matters, certain rights of Dr. David Ranney to be
nominated or to have his nominee nominated for election to the Board of
Directors of Chemex at any election of Chemex directors; a right of first
refusal of Dr. David Ranney to license or purchase certain technology and
intellectual property of Chemex under certain conditions; an agreement to amend
that certain Patent Purchase Agreement, dated as of April 5, 1994, between Dr.
David Ranney and ACCESS, regarding certain royalties payable to Dr. David Ranney
relating to certain technology and intellectual property of ACCESS and an
agreement, subject to certain conditions, by Dr. David Ranney not to sell,
transfer or otherwise dispose of his shares of the capital stock of Chemex for a
period of six months following the Effective Time of the Merger. See "The
Proposed Merger -- Stockholder's Agreement."
 
     In addition, pursuant to a Letter Agreement, dated as of September 1, 1995,
Dr. David Ranney agreed, subject to certain conditions, to vote (or consent) all
of the shares of ACCESS Common Stock for which he had voting power in favor of
any proposal to approve and adopt the Merger Agreement.
 
     Atul Khandwala.  With the cessation of all of Chemex's research and
development operations on July 31, 1995 (See "Business of Chemex") Management
determined that the services of Mr. Khandwala, Executive Vice President of
Chemex, were no longer needed by Chemex. By a Letter Agreement dated August 18,
1995, Chemex agreed to (i) pay to Mr. Khandwala severance equal to six months of
his annual salary (approximately $80,313) reduced by applicable taxes; (ii)
extend the period for exercise of
 
                                       82
<PAGE>   94
 
Mr. Khandwala's options and SARs for the purchase of Chemex Common Stock from
three months after the date of the termination of Mr. Khandwala's employment
with Chemex to the expiration date of the options and SARs (See "Summary
Compensation Table" and "Options/SARs Exercises and Year-End Value Table");
(iii) pay Mr. Khandwala, promptly after the approval by the Chemex stockholders
of the sale of Amlexanox to Block, approximately $9,846 for accrued but unused
vacation time; and (iv) provide Mr. Khandwala with medical insurance for three
months.
 
     Herbert McDade.  In consideration for the termination of his employment
with Chemex and for an agreement by Mr. McDade to forfeit severance pay equal to
approximately two years of his base salary which he would be otherwise entitled
to receive on a change in control of ACCESS pursuant to his employment agreement
with Chemex, conditioned upon the consummation of the Merger Mr. McDade and
Chemex have entered into an agreement on October 4, 1995, pursuant to which,
among other things, (i) Mr. McDade will become a consultant to Chemex, providing
consulting services, to Chemex at least four days each month and will be paid a
base of $1,500 per day of consulting; (ii) Chemex will use its best efforts to
retain Mr. McDade's enrollment under its healthcare plan and (iii) the period
for exercise for all options and SARS owned by Mr. McDade will be extended from
three months after the termination of his employment with Chemex to the
expiration of the option of SAR. See "Security Ownership of Certain Beneficial
Owners and Management" for both Chemex and ACCESS.
 
                                       83
<PAGE>   95
 
                        COMPARISON OF RIGHTS OF HOLDERS
                       OF ACCESS COMMON STOCK AND CHEMEX
                                  COMMON STOCK
 
     ACCESS is incorporated under the laws of the State of Texas, and Chemex is
incorporated under the laws of the State of Delaware. ACCESS stockholders whose
rights as stockholders are currently governed by Texas law under ACCESS'
Articles of Incorporation and Bylaws, will become, upon consummation of the
merger, stockholders of Chemex and their rights will be governed by Delaware law
and Chemex's Certificate of Incorporation and Bylaws. Many provisions of the
Texas Business Corporation Act have been conformed to provisions of the Delaware
General Corporation Law in recent years, including provisions which permit a
corporation to indemnify its directors, officers, agents and employees and which
permit it to exonerate its directors from liability to the corporation or its
stockholders for monetary damages, except in certain specified cases. ACCESS'
Articles of Incorporation or Bylaws currently provide for such indemnification
to the extent permitted by law and for such limitation of directors' liability
and Chemex's Certificate of Incorporation and Bylaws do so as well. Some of the
differences between the Texas and Delaware corporation laws, as such differences
may affect the rights of stockholders, are set forth below. It should be
understood that this description of the differences is a summary only and does
not purport to be a complete description of the differences between the Texas
Business Corporation Act and the Delaware General Corporation Law.
 
     Under Texas law and Delaware law, stockholders have the right to vote on
all mergers to which the corporation is a party except under certain
circumstances such as the merger into the surviving corporation of subsidiaries
owned 90% or more by the surviving corporation or on the acquisition by merger
directly into the surviving corporation of companies in cases where the amount
of the surviving corporation's common stock to be issued or delivered under the
plan of merger does not exceed 20% of the shares of common stock outstanding
immediately prior to the effective date of the merger. Under Texas law in
certain circumstances, different classes of securities may be entitled to vote
separately as classes with respect to such transactions. Approval of the holders
of at least two-thirds of all outstanding shares entitled to vote is required by
Texas law unless a corporation amends its articles of incorporation to provide
differently. ACCESS' Articles of Incorporation require the affirmative vote of
the holders of a majority of all outstanding shares entitled to vote in order to
approve a merger. Under Delaware law, approval of the holders of a majority of
shares is required for the merger of a Delaware corporation. Stockholders of
Texas corporations have the right to vote upon sales of substantially all of the
assets of a corporation, while stockholders of Delaware corporations have no
similar right.
 
     Except under certain circumstances, stockholders of Texas corporations have
appraisal rights in the event of a merger, consolidation or sale, lease,
exchange, or other disposition (excluding any pledge, mortgage, deed of trust,
or trust indenture, unless otherwise provided in the articles of incorporation)
of all, or substantially all, the property and assets of the corporation. See
"The Proposed Merger -- Appraisal Rights." Under Delaware law, stockholders
generally have appraisal rights with respect to a merger or consolidation, but
not with respect to a sale of assets. Stockholders of both corporations have no
appraisal rights in the event of a merger or consolidation of the corporation in
which they (i) receive shares of a corporation that are listed (or approved for
listing) on a national securities exchange or held of record by more than 2,000
stockholders, and (ii) are not required to accept any other consideration except
cash in lieu of fractional shares. The Delaware General Corporation Law extends
this exception to shares on Nasdaq and also limits appraisal rights where the
listing or holders of record requirements are met by the Delaware corporation on
the record date of the stockholder meeting to approve the merger or
consolidation.
 
     Under the Delaware statute, a corporation may not engage in a business
combination with any person who has acquired 15% or more of a Delaware
corporation's voting stock (an "interested stockholder") for a period of three
years after the 15% acquisition, unless (i) prior to the acquisition the board
of directors of the corporation has either approved the business combination or
the transaction which resulted in the 15% acquisition, (ii) upon consummation of
the transaction resulting in the 15% acquisition, the interested stockholder
owned at least 85% of the corporation's outstanding voting stock (excluding
shares owned by certain corporate insiders and employee stock plans), or (iii)
the business combination is approved by the corporation's board of directors and
authorized by holders of at least two-thirds of the outstanding voting stock
 
                                       84
<PAGE>   96
 
(excluding the stock owned by the interested stockholder). This statute applies
automatically to several classes of Delaware corporations, including those with
voting stock authorized for trading on Nasdaq, unless otherwise provided in the
certificate of incorporation or by action of a majority of the corporation's
stockholders. The Chemex Certificate of Incorporation and Bylaws do not provide
otherwise. No similar statute currently exists under Texas law, and ACCESS'
Articles of Incorporation do not include provisions restricting business
combinations with interested stockholders.
 
     Under Texas law, any vacancy occurring in the board of directions may be
filled by the stockholders or by the affirmative vote of a majority of the
remaining directors. A position to be filled by reason of an increase in the
number of directors may be filled by the stockholders or by the board of
directors for a term of office continuing only until the next election of one or
more directors by the stockholders, provided, that the board of directors may
not fill more than two such directorships during the period between any two
successive annual meetings of stockholders. Under Delaware law, unless the
certificate of incorporation or bylaws provide otherwise, vacancies and newly
created directorships resulting from any increase in the authorized number of
directors may be filled by a majority of the directors then in office. The
Chemex Certificate of Incorporation and Bylaws do not provide otherwise.
 
     Under Texas law, holders of not less than 10% of all the shares entitled to
vote have the right to call a special stockholders' meeting, unless the articles
of incorporation provide for a number of shares greater than or less than 10%
(but not greater than 50%), in which event, special meetings of the stockholders
may be called by the holders of at least the percentage of shares specified in
the articles of incorporation. ACCESS' Articles of Incorporation and Bylaws do
not provide otherwise. Delaware law provides that special meetings of the
stockholders may be called by the board of directors or such other persons
authorized in the certificate of incorporation or bylaws. Chemex' Certificate of
Incorporation and Bylaws do not provide for the calling of a special
stockholders' meeting by anyone other than the board of directors of Chemex.
 
     Neither Delaware nor Texas corporation law requires that stockholders have
preemptive rights or the right of cumulative voting. Stockholders of ACCESS do
not now have preemptive rights or the right of cumulative voting, in that
ACCESS' Articles of Incorporation deny such rights, and they will not have such
rights as stockholders of Chemex.
 
     Under Texas law, an amendment to the articles of incorporation requires the
approval of the holders of at least two-thirds of the outstanding shares of the
corporation, unless a different amount, not less than a majority, is specified
in the articles of incorporation. The ACCESS Articles of Incorporation do not
provide for such different amount for approval of an amendment to the Articles
of Incorporation. Delaware law provides that amendments to the certificate of
incorporation must be approved by the holders of a majority of the corporation's
stock entitled to vote thereon, unless the certificate of incorporation provides
for a greater number. The Certificate of Incorporation of Chemex does not
provide for any such greater number.
 
                                 LEGAL MATTERS
 
     Matters relating to the legality of the Shares of Chemex Common Stock
offered by this Proxy Statement/Prospectus are being passed upon by Bingham,
Dana & Gould, 150 Federal Street, Boston, Massachusetts 02110.
 
                                    EXPERTS
 
   
     The audited financial statements of Chemex Pharmaceuticals, Inc. as of
December 31, 1994 and 1993 and for each of the years in the three year period
ended December 31, 1994 have been included herein and in the Registration
Statement in reliance upon the report of KPMG Peat Marwick LLP, independent
certified public accountants, appearing elsewhere herein, and upon the authority
of said firm as experts in accounting and auditing. The report of KPMG Peat
Marwick LLP covering such financial statements contains an explanatory paragraph
that states that Chemex's recurring losses raise substantial doubt about
Chemex's ability to continue as a going concern. The financial statements do not
include any adjustments that might result from the outcome of that uncertainty.
    
 
                                       85
<PAGE>   97
 
   
     The audited financial statements of ACCESS Pharmaceuticals, Inc. as of
December 31, 1994 and 1993 and for each of the years in the three year period
ended December 31, 1994 have been included herein and in the Registration
Statement in reliance upon the report of Smith, Anglin & Co., independent
certified public accountants, appearing elsewhere herein, and upon the authority
of said firm as experts in accounting and auditing. The report of Smith, Anglin
& Co. covering such financial statements contains an explanatory paragraph that
states that ACCESS' recurring losses raise substantial doubt about ACCESS'
ability to continue as a going concern. The financial statements do not include
any adjustments that might result from the outcome of that uncertainty.
    
 
                             STOCKHOLDER PROPOSALS
 
     Stockholder proposals intended to be presented at Chemex's 1996 Annual
Meeting of Stockholders pursuant to the provisions of Rule 14a-8 of the
Commission, promulgated under the Exchange Act, must be received by Chemex at
its principal executive office by April 15, 1996 for inclusion in Chemex's proxy
statement and form of proxy relating to such meeting.
 
                                       86
<PAGE>   98
 
                            DISCRETIONARY AUTHORITY
 
     While the Notice of Special Meeting of Shareholders calls for the
transaction of such other business as may properly come before the Special
Meeting, the Board of Directors of Chemex has no knowledge of any matters to be
presented for action by the Stockholders at the Special Meeting other than as
set forth in the Notice to Stockholders. The enclosed Proxy gives discretionary
authority, however, if any other matters are properly presented at the Special
Meeting for consideration, including consideration of a motion to adjourn the
Special Meeting to another time and/or place (including for the purpose of
soliciting additional proxies).
 
                                          By Order of the Board of Directors
 
                                          Herbert H. McDade, Jr.
                                          Chairman of the Board
                                          President and Chief Executive Officer
 
                                       87
<PAGE>   99
 
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
CHEMEX PHARMACEUTICALS, INC.
Independent Auditors' Report..........................................................  F-2
Balance Sheets as of December 31, 1994 and 1993 and September 30, 1995*...............  F-3
Statements of Operations for each of the three years in the period ended December 31,
  1994 and for the nine months ended September 30, 1995* and for the nine months ended
September 30, 1994*...................................................................  F-4
Statements of Stockholders' Equity for each of the three years in the period
ended December 31, 1994*..............................................................  F-5
Statements of Cash Flows for each of the three years in the period ended December 31,
  1994 and for the nine months ended September 30, 1995* and for the nine months ended
September 30, 1994*...................................................................  F-6
Notes to Financial Statements.........................................................  F-7
    
<FN> 
- ---------------
   
* The financial statements as of September 30, 1995 for the nine months ended
  September 30, 1995 and for the nine months ended September 30, 1994 are
  unaudited.
    
</TABLE>
 
   
<TABLE>
<S>                                                                                     <C>
ACCESS PHARMACEUTICALS, INC.
Independent Auditors' Report..........................................................  F-15
Balance Sheets as of December 31, 1994 and 1993 and September 30, 1995*...............  F-16
Statements of Operations for each of the three years in the period ended December 31,
  1994 and for the nine months ended September 30, 1995 and for the nine months ended
September 30, 1994*...................................................................  F-17
Statements of Stockholders' Equity for each of the three years in the period
ended December 31, 1994...............................................................  F-18
Statements of Cash Flows for each of the three years in the period ended December 31,
  1994 and for the nine months ended September 30, 1995 and for the nine months ended
September 30, 1995*...................................................................  F-19
Notes to Financial Statements.........................................................  F-20
    
<FN> 
- ---------------
   
* The financial statements as of September 30, 1995 and for the nine months
  ended September 30, 1995 and
  for the nine months ended September 30, 1994 are unaudited.
    
</TABLE>
 
                                       F-1
<PAGE>   100
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Stockholders
Chemex Pharmaceuticals, Inc.:
 
   
     We have audited the financial statements of Chemex Pharmaceuticals, Inc. as
of December 31, 1994 and 1993, and the related statements of operations,
stockholders' equity and cash flows for each of the years in the period ended
December 31, 1994. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.
    
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Chemex Pharmaceuticals,
Inc., as of December 31, 1994 and 1993, and the results of its operations and
its cash flows for each of the years in the three-year period ended December 31,
1994, in conformity with generally accepted accounting principles.
 
     The accompanying financial statements have been prepared assuming that
Chemex Pharmaceuticals, Inc. will continue as a going concern. As discussed in
note 1 to the financial statements, the Company's recurring losses raise
substantial doubt about the entity's ability to continue as a going concern.
Managements' plans in regard to this matter are described in note 1. The
financial statements do not include any adjustments that might result from the
outcome of this uncertainty.
 
KPMG Peat Marwick LLP
 
New York, New York
March 30, 1995
 
                                       F-2
<PAGE>   101
 
                          CHEMEX PHARMACEUTICALS, INC.
 
                                 BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                                             
                                                                     
                                                                             DECEMBER 31,
                                                   SEPTEMBER 30,     -----------------------------
                                                       1995              1994             1993
                                                   -------------     ------------     ------------
                                                   (UNAUDITED)
<S>                                                <C>               <C>              <C>
                                              ASSETS
Current Assets:
  Cash and cash equivalents (Note 1).............  $   2,348,000     $  1,335,000     $  2,362,000
  Accounts receivable (Note 1)...................         12,000          136,000          353,000
  Prepaid expenses and other assets..............         25,000          151,000          194,000
                                                    ------------     ------------     ------------
          Total current assets...................      2,385,000        1,622,000        2,909,000
                                                    ------------     ------------     ------------
Furniture, Equipment and Leasehold
  Improvements, at cost..........................         95,000          123,000          157,000
  Less accumulated depreciation and
     amortization................................        (64,000)         (61,000)         (70,000)
                                                    ------------     ------------     ------------
                                                          31,000           62,000           87,000
                                                    ------------     ------------     ------------
Other Assets.....................................          1,000           20,000           20,000
                                                    ------------     ------------     ------------
          Total Assets...........................  $   2,417,000     $  1,704,000        3,016,000
                                                    ============     ============     ============
                               LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable...............................  $     126,000     $    190,000          284,000
  Lease termination obligation...................         60,000               --               --
  Accrued legal settlement (Note 5)..............             --               --          475,000
  Financed insurance premium.....................             --           90,000           98,000
  Accrued liabilities............................         13,000           85,000          113,000
                                                    ------------     ------------     ------------
          Total current liabilities..............        199,000          365,000          970,000
Long-term liabilities............................         10,000           12,000           16,000
                                                    ------------     ------------     ------------
          Total liabilities......................        209,000          377,000          986,000
                                                    ------------     ------------     ------------
Commitments (Note 5)
Stockholders' Equity (Notes 2 and 3)
  Preferred stock, $.01 par value. Authorized
  5,000,000 shares; none outstanding.............             --               --               --
Common stock, $.04 par value. Authorized
  22,000,000 shares; outstanding 8,737,788,
  8,678,660 and 8,524,076 shares.................        350,000          347,000          341,000
  Additional paid in capital.....................     40,367,000       40,352,000       40,102,000
  Treasury stock, 1,677 shares...................         (5,000)          (5,000)          (5,000)
  Deficit........................................    (38,504,000)     (39,367,000)     (38,408,000)
                                                    ------------     ------------     ------------
          Total Stockholders' Equity.............      2,208,000        1,327,000        2,030,000
                                                    ------------     ------------     ------------
  Total Liabilities and Stockholders' Equity.....  $   2,417,000     $  1,704,000        3,016,000
                                                    ============     ============     ============
</TABLE>
    
 
                 See accompanying notes to financial statements
 
                                       F-3
<PAGE>   102
 
                          CHEMEX PHARMACEUTICALS, INC.
 
   
                            STATEMENTS OF OPERATIONS
    
 
<TABLE>
<CAPTION>
                                         NINE MONTHS ENDED              
                                           SEPTEMBER 30,                YEAR ENDED DECEMBER 31,
                                     -------------------------   -------------------------------------   
                                        1995           1994          1994         1993          1992
                                     -----------    -----------   ----------   -----------   ----------
                                     (UNAUDITED)    (UNAUDITED)
<S>                                  <C>           <C>           <C>          <C>           <C>
REVENUES:
  Sale of Proprietary rights (Note
     8)............................  $        --   $ 1,700,000   $1,700,000   $        --   $       --
  Sale of Amlexanox rights.........    2,500,000            --           --            --           --
  Joint Venture project revenue
     (Note 8)......................       10,000     1,127,000    1,371,000     1,468,000    2,251,000
  Amlexanox project revenue........      342,000            --           --            --           --
  Actinex royalty (Note 7).........        7,000        25,000       26,000        49,000       45,000
  Actinex milestones (Note 7)......           --            --           --            --    6,000,000
  Actinex-sale of NDGA (Note 7)....           --            --           --            --      408,000
  Actinex-project revenue (Note
     7)............................           --            --           --            --      264,000
  Interest and dividend income.....       26,000        49,000       65,000       139,000       61,000
  Other Income.....................           --            --           --            --       17,000
                                     -----------    ----------   ----------   -----------   ----------
          Total Revenues...........    2,885,000     2,901,000    3,162,000     1,656,000    9,046,000
                                     -----------    ----------   ----------   -----------   ----------
EXPENSES:
  Research & Development
     (Notes 2,3,7 & 8)
     Joint Venture (Note 8)........      578,000     1,932,000    2,438,000     2,582,000    2,074,000
     Chemex proprietary............      553,000       145,000      153,000       324,000      317,000
     Actinex (Note 7)..............           --            --           --            --      265,000
  General and Administrative and
     Other Operating Expenses......      885,000     1,057,000    1,381,000     1,895,000    1,484,000
     Professional fees-related
       parties (Note 6)............        6,000        11,000       27,000       108,000      311,000
     Amortization of stock awards
       (Note 3(d)).................           --            --      122,000      (161,000)     (90,000)
     Settlement of litigation (Note
       5)..........................           --            --           --       475,000           --
                                     -----------    ----------   ----------   -----------   ----------
          Total Expenses...........    2,022,000     3,145,000    4,121,000     5,223,000    4,361,000
                                     -----------    ----------   ----------   -----------   ----------
Income (loss) before income
  taxes............................      863,000      (244,000)    (959,000)   (3,567,000)   4,685,000
Provision for income taxes (Note
  4)...............................           --            --           --            --      431,000
                                     -----------    ----------   ----------   -----------   ----------
Net Income (loss)..................  $   863,000   $  (244,000)  $ (959,000)  $(3,567,000)  $4,254,000
                                     ===========    ==========   ==========   ===========   ==========
Net Income (loss) per common share
  (Note 1).........................  $      0.10   $     (0.03)  $    (0.11)  $     (0.43)  $     0.48
                                     ===========    ==========   ==========   ===========   ==========
Average number of common and
  equivalent shares outstanding
  (Note 1).........................    8,713,000     8,542,000    8,543,003     8,384,904    8,843,465
                                     ===========    ==========   ==========   ===========   ==========
</TABLE>
 
                       See Notes to Financial Statements
 
                                       F-4
<PAGE>   103
 
                          CHEMEX PHARMACEUTICALS, INC.
 
   
                       STATEMENTS OF STOCKHOLDERS' EQUITY
    
                   YEARS ENDED DECEMBER 31, 1994, 1993, 1992
 
<TABLE>
<CAPTION>
                                                   COMMON       ADD'L                                    TOTAL
                                        COMMON     STOCK       PAID-IN                    TREASURY   STOCKHOLDERS'
                                        SHARES     AMOUNT      CAPITAL       DEFICIT       STOCK        EQUITY
                                      ----------  --------   -----------   ------------   --------   -------------
<S>                                   <C>         <C>        <C>           <C>            <C>        <C>
BALANCES AT DECEMBER 31, 1991.......   8,186,789  $328,000   $39,557,000   $(39,094,000)  $(5,000 )   $   786,000
                                       ---------  --------   -----------   ------------   -------     -----------
Issuance of common stock for
  services (Note 2a)................       1,200                   5,000                                    5,000
Issuance of common stock as servance
  (Note 2a).........................      34,626     1,000       124,000                                  125,000
Issuance of common stock for ESOP
  (Note 3c).........................      49,648     2,000       152,000                                  154,000
Exercise of stock options...........      42,300     2,000        49,000                                   51,000
Stock award expense (Note 3d).......                              14,000                                   14,000
SARs reclassed to Paid in Capital
  (Note 3d).........................                             137,000                                  137,000
Net profit -- 1992..................                                          4,254,000                 4,254,000
                                       ---------  --------   -----------   ------------   -------     -----------
BALANCES AT DECEMBER 31, 1992.......   8,314,563  $333,000   $40,038,000   $(34,841,000)  $(5,000 )   $ 5,525,000
                                       ---------  --------   -----------   ------------   -------     -----------
Issuance of common stock for ESOP
  (Note 3c).........................     117,763     5,000       156,000                                  161,000
Exercise of stock options/SARs (Note
  3a and 3b)........................      66,750     2,000        20,000                                   22,000
Stock award amortization (Note
  3d)...............................                            (161,000)                                (161,000)
Issuance of common stock for
  services (Note 2a)................      25,000     1,000        49,000                                   50,000
Net loss -- 1993....................                                         (3,567,000)               (3,567,000)
                                       ---------  --------   -----------   ------------   -------     -----------
BALANCES AT DECEMBER 31, 1993.......   8,524,076  $341,000   $40,102,000   $(38,408,000)  $(5,000 )   $ 2,030,000
                                       ---------  --------   -----------   ------------   -------     -----------
Issuance of common stock for ESOP
  (Note 3c).........................     154,580     6,000        95,000                                  101,000
Stock award expense (Note 3d).......                             155,000                                  155,000
Warrants exercised..................           4                                                               --
Net loss -- 1994....................                                           (959,000)                 (959,000)
                                       ---------  --------   -----------   ------------   -------     -----------
BALANCES AT DECEMBER 31, 1994.......   8,678,660  $347,000   $40,352,000   $(39,367,000)  $(5,000 )   $ 1,327,000
                                       ---------  --------   -----------   ------------   -------     -----------
</TABLE>
 
                       See Notes to Financial Statements
 
                                       F-5
<PAGE>   104
 
                          CHEMEX PHARMACEUTICALS, INC.
 
   
                            STATEMENTS OF CASH FLOWS
    
 
<TABLE>
<CAPTION>
                                                              NINE MONTHS ENDED
                                                                SEPTEMBER 30,               YEAR ENDED DECEMBER 31,
                                                           -----------------------   --------------------------------------
                                                              1995         1994         1994          1993          1992
                                                           ----------   ----------   -----------   -----------   ----------
<S>                                                        <C>          <C>          <C>           <C>           <C>
Cash Flows From Operating Activities:
  Net profit (Loss)......................................  $  863,000   $ (244,000)  $  (959,000)  $(3,567,000)  $4,254,000
  Adjustments to reconcile net income/(loss) to cash used
    by operating activities:
    Depreciation and amortization........................      19,000       19,000        25,000        24,000       30,000
    Common stock issued in payment for services..........          --           --            --        50,000        5,000
    Common stock contributed to Employee Stock Ownership
      Plan...............................................      20,000       32,000       101,000       161,000      154,000
    Stock amortization expense...........................      (2,000)      61,000       155,000      (161,000)     151,000
    Change in assets and liabilities:
      Decrease (increase) in receivables.................     124,000       75,000       217,000      (102,000)     193,000
      Decrease (increase) in prepaid expenses and other
        current assets...................................     126,000      141,000        43,000       (78,000)       6,000
      Decrease in other assets...........................      19,000           --            --            --        5,000
      Increase (decrease) in accounts payable............     (64,000)    (103,000)      (94,000)      (35,000)      55,000
      Decrease in accrued SARs...........................          --           --            --            --     (244,000)
      Increase in lease termination obligation...........      60,000           --            --            --           --
      Increase (decrease) in accrued taxes...............          --           --            --      (431,000)     405,000
      Increase (decrease) in litigation settlement.......          --     (475,000)     (475,000)      475,000           --
      Decreased in accrued severance.....................          --           --            --            --     (125,000)
      Increase (decrease) in other accrued liabilities...    (162,000)    (165,000)      (36,000)      (48,000)     153,000
                                                           ----------   ----------   -----------   -----------   ----------
        Net cash provided by (used by) operating
          activities.....................................   1,003,000     (659,000)   (1,023,000)   (3,712,000)   5,042,000
                                                           ----------   ----------   -----------   -----------   ----------
Cash Flows From Investing Activities:
  Capital expenditures...................................          --           --            --        (3,000)     (62,000)
                                                           ----------   ----------   -----------   -----------   ----------
      Net cash used by investing activities..............          --           --            --        (3,000)     (62,000)
                                                           ----------   ----------   -----------   -----------   ----------
Cash Flows From Financing Activities:
  Proceeds from exercising of stock options and common
    stock purchase warrants, net.........................          --           --            --        22,000       50,000
  Proceeds from sale of assets...........................      12,000           --            --            --           --
  Principal payments on capital leases...................      (2,000)      (2,000)       (4,000)       (5,000)      (8,000)
                                                           ----------   ----------   -----------   -----------   ----------
    Net cash provided by (used in) financing
      activities.........................................      10,000       (2,000)       (4,000)       17,000       42,000
                                                           ----------   ----------   -----------   -----------   ----------
Net increase (decrease) in cash and cash equivalents.....   1,013,000     (661,000)   (1,027,000)   (3,698,000)   5,022,000
                                                           ----------   ----------   -----------   -----------   ----------
Cash and cash equivalents at beginning of period.........   1,335,000    2,362,000     2,362,000     6,060,000    1,038,000
                                                           ----------   ----------   -----------   -----------   ----------
Cash and cash equivalents at end of period...............  $2,348,000   $1,701,000   $ 1,335,000   $ 2,362,000   $6,060,000
                                                           ==========   ==========   ===========   ===========   ==========
Cash paid for interest...................................  $       --   $       --   $     5,223   $     3,300   $    8,332
Cash paid for income taxes...............................  $       --   $       --   $        --   $   431,000   $       --
Other non-cash transaction-capital lease.................  $       --   $       --   $        --   $    19,000   $       --
</TABLE>
 
                       See Notes to Financial Statements
 
                                       F-6
<PAGE>   105
 
                          CHEMEX PHARMACEUTICALS. INC.
 
                         NOTES TO FINANCIAL STATEMENTS
   
(INFORMATION AS OF AND FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1995 AND 1994 IS
                                   UNAUDITED)
    
 
(1) THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  (a) The Company
 
     Chemex Pharmaceuticals, Inc. ("Chemex" or the "Company") is engaged in
research and development activities relating to the determination of the
potential use, if any, of elements of certain natural products and synthetic
compounds for therapeutic purposes. The creation of a Joint Venture (see note 8)
to commercialize these activities was signed with Block Drug Company, Inc.
("Block") in June 1991 and represented the commencement of planned operations.
The Joint Venture was dissolved effective December 31, 1994, and pursuant to
such dissolution, the original compounds that had been contributed to the Joint
Venture by Chemex, were returned to Chemex, with the exception of Amlexanox
which is now owned under a new joint ownership arrangement between the Company
and Block.
 
     The Company incurred significant losses in years 1994 and 1993, as well as
the years prior to 1992. In 1988, the Company filed for FDA approval for its
product Actinex(R). Actinex(R) was approved for sale in September 1992 and
resulted in Chemex receiving $6 million in milestone payments during fiscal
1992. However, in view of the losses in 1993 and 1994, the lack of new equity
financing during this time period, and the dissolution of the Joint Venture, the
Company only has funds to meet its revised "burn rate" until June 1995. The
Company is actively seeking a merger partner as a means of continuing its
operations and has an option to transfer its rights to Amlexanox to Block for an
upfront non-refundable prepaid royalty of $2.5 million plus future royalties,
subject to the consent of Takeda Chemicals (the licensor) and approval of Chemex
shareholders. Such payment to Chemex could enable the Company to fund its
operations through the end of fiscal 1995.
 
   
     If the Company does not complete a merger by the end of the second quarter
of 1995 as a means of continuing its operations, it will be forced to
dramatically curtail most of its expenses. (See Note 10) If such an event
occurs, even with the Chemex option to receive a non-refundable upfront payment
for Amlexanox, it will be unlikely that the Company will be able to continue as
a going concern. The financial statements do not include any adjustments
relating to the recoverability and classification of recorded asset amounts or
the amounts and classification of liabilities that might be necessary should the
Company he unable to continue as a going concern.
    
 
  (b) Reverse Split and Stock Dividend
 
     On August 27, 1991, the Company's stockholders approved a one for four
reverse stock split of all authorized shares of Chemex's common stock ("Reverse
Split"). The Board of Directors was authorized to implement the Reverse Split if
and when it deemed it to be in the interests of the Company to do so. On March
18, 1992, the Board of Directors approved a one for four reverse stock split for
the shareholders of record as of April 15, 1992 as well as an increase in common
stock par value from $.01 to $.04. Simultaneously, the Board authorized a 100%
stock dividend ("Stock Dividend"), which had the effect of a reverse split of
the stock on a one for two basis. These transactions also affected the option
and warrant holders of record as of April 15, 1992. The accompanying financial
statements and notes thereto give retroactive effect to the Reverse Split and
the Stock Dividend.
 
  (c) Cash and Cash Equivalents
 
     The Company considers all highly liquid debt instruments with an original
maturity of three months or less to be cash equivalents for purposes of the
statements of cash flows.
 
                                       F-7
<PAGE>   106
 
  (d) Depreciation
 
     Depreciation of furniture and equipment is provided using the straight-line
method based on estimated useful lives of 5 years. Depreciation expense for the
years ended December 31, 1994, 1993 and 1992, amounted to $25,000, $24,000, and
$30,000, respectively.
 
  (e) Net Income (Loss) Per Common Share
 
     Net income (loss) per common share is calculated based upon the weighted
average number of common shares and common equivalent shares outstanding during
the years ended December 31, 1994, 1993 and 1992 of 8,543,003, 8,384,904 and
8,843,465, respectively. There was no significant difference between primary and
fully diluted earnings in 1992, and in 1994 and 1993 any common equivalent
shares were anti-dilutive.
 
  (f) Revenues
 
     The Company entered into two separate agreements with Block under which it
performed contract research and development. The first agreement represents the
sale of Actinex(R) to Block, whereby the Company was reimbursed for any outside
costs it incurred in connection with the further development of Actinex(R). The
second agreement with Block was the Joint Venture, under which Chemex was
responsible for performing all research and development of the Joint Venture
products. Through December 31, 1994 (the effective date of the dissolution of
the Joint Venture), Chemex shared equally with Block all research and
development expenses after the first $3 million of expenditures which was paid
by Block, however, this agreement was terminated by mutual consent on December
31, 1994 (see note 8 for further discussion). As long as Block and Chemex remain
joint owners of Amlexanox, 50% of research conducted for Amlexanox will be
billed to Block.
 
  (g) Research and Development Expenses
 
     All costs of research and development are expensed in the period incurred.
 
  (h) Account Receivable
 
     Accounts receivable as of December 31, 1994 and December 31, 1993 were
$136,000 and $353,000, respectively, and were entirely due from Block Drug for
the Joint Venture research and development expenses and Actinex(R) royalty.
 
  (i) Interim Financial Statements
 
   
     The balance sheet as of September 30, 1995 and the statements of operations
and cash flows for the nine months ended September 30, 1995 and 1994 were
prepared by Chemex Pharmaceuticals, Inc. (the "Company") without audit. In the
opinion of management, all adjustments, including only normal recurring
adjustments necessary for the fair presentation of the financial position,
results of operations, and cash flows for such periods have been made. The
results of operations for the period ended September 30, 1995 is not necessarily
indicative of the operating results which may be expected for a full year.
    
 
(2) STOCKHOLDERS' EQUITY
 
  (a) Common Stock
 
     The Company issued restricted shares of its common stock as payment for
various costs and services. These shares were valued by the Company's Board of
Directors (the Board) based upon the quoted market price on the date of issue,
discounted as considered appropriate by the Board, for the restricted nature of
the stock. During the year ended December 31, 1994, the Company did not issue
any shares of common stock as payment for any obligations. During the year ended
December 31, 1993, the Company issued 25,000 shares of common stock at a value
of $50,000 as payment of outside investment banking services. During the year
ended December 31, 1992, the Company issued 1,200 shares valued at $4,656 as
payment for consulting services. During the year ended December 31, 1992, the
Company issued 34,626 shares at a value of $125,000 to its
 
                                       F-8
<PAGE>   107
 
former president as partial payment of severance cost (during 1991 and 1990,
49,139 shares and 41,151 shares, respectively were issued valued at $125,000
each year to the same individual).
 
     The Company paid the last $250,000 of a severance agreement to its former
president in July 1992. The Company paid 50% of this payment in the form of
common shares and the balance in cash; the entire amount paid in 1992 had been
expensed and accrued as of December 31, 1990.
 
  (b) Warrants
 
     The Company has two sets of warrants which are not redeemable by the
Company. At December 31, 1994 the following warrants were outstanding:
 
<TABLE>
<CAPTION>
                                                  NUMBER OF     EXERCISE PRICE      EXPIRATION
                                                  WARRANTS        PER SHARE            DATE
                                                  ---------     --------------     -------------
    <S>                                           <C>           <C>                <C>
    1989-1 Warrants.............................  2,183,877         $12.00         Mar. 31, 1995
    1994-2 Warrants.............................  1,187,499         $ 6.25         Oct. 31, 1995
                                                  ---------
    Total.......................................  3,371,380
                                                  =========
</TABLE>
 
(3) STOCK OPTION PLAN AND EMPLOYEE STOCK OWNERSHIP PLAN
 
  (a) Stock Option Plan
 
     The Company adopted a stock option plan (the "1987 Stock Awards Plan") and
reserved 1,725,000 shares of the Company's common stock for issuance to
optionees including officers, employees, and other individuals performing
services for the Company. The 1987 Stock Awards Plan replaced the previously
approved Restated Non-Qualified Stock Option Plan (the "Restated Plan") and
includes stock appreciation rights, which vest based on the achievement of
certain financial and operational benchmarks. Options granted under the plans
are generally exercisable over a ten-year period from the date of grant.
 
     Summarized information for the 1987 Plan is as follows:
 
   
<TABLE>
<CAPTION>
                                                                           1987 PLAN
                                                                   -------------------------
                                                                     INCENTIVE
                                                                   STOCK OPTIONS     SARS(1)
                                                                   -------------     -------
    <S>                                                            <C>               <C>
    Outstanding options at December 31, 1993.....................      873,315       101,122
    Granted......................................................      256,186       259,039
    Forfeited....................................................      (36,899)
    Exercised....................................................          -0-           -0-
                                                                   -------------     -------
    Outstanding options at December 31, 1994.....................    1,092,602       360,161
                                                                    ==========       =======
    At December 31, 1994:
      - Average exercise price of outstanding options............        $2.70       $  0.00
      - Exercisable options......................................      673,488       139,880
</TABLE>
    
 
- ---------------
Options for the purchase of 77,662 shares were available for grant as of
December 31, 1994
 
(1) See Note [3(d)]
 
                                       F-9
<PAGE>   108
 
  (b) Non-employee Director Stock Option Plan
 
     The Company adopted the Non-Employee Director Stock Option Plan during 1987
and reserved 467,500 shares of the Company's common stock for options awarded
under the plan. Directors who had options in the Restated Plan relinquished
those options for equivalent options in the Non-Employee Director Stock Option
Plan. During 1994, the Company had one Director reelected who received 20,000
options at market value as of the date of the grant. In addition, an aggregate
of 6,667 options were granted retroactively to two directors who had been
reelected to the Board of Directors one or more times. Shares under option at
December 31, 1994 are as follows:
 
                        1987 NON-EMPLOYEE DIRECTOR PLAN
 
<TABLE>
    <S>                                                                          <C>
    Outstanding options at December 31, 1993...................................  283,885
    Granted....................................................................   26,667
    Forfeited..................................................................  (13,498)
    Exercised..................................................................      -0-
                                                                                 -------
    Outstanding options at December 31, 1994...................................  299,054
                                                                                 -------
    At December 31, 1993:
      - Average price of outstanding options...................................    $3.02
      - Exercisable options....................................................  270,021
</TABLE>
 
     Both of the Plans described above provide for shares to be purchased for
cash or with shares of the Company's common stock owned by the optionee with a
market value equal to the aggregate option price.
 
     Stock options and stock appreciation rights vest to the optionees and are
payable immediately upon a change in control of the Company. Change in control
is generally defined as the acquisition of 25% or more of the common stock of
the Company by an individual or a group.
 
  (c) Employee Stock Ownership Plan ("ESOP")
 
     Effective January 1, 1986, the Company adopted a qualified Employee Stock
Ownership Plan (ESOP) in which all employees are eligible to participate. The
ESOP provides that the Company may elect to match employee contributions at
varying percentage rates designated by the Company (50% in 1992, 1993, and 1994)
and may make an annual contribution to the ESOP as determined by the Board, with
a maximum contribution not to exceed the amount deductible under the Internal
Revenue Code. Contributions to the ESOP can be made in cash, mutual funds or in
common stock of the Company. During the years ended December 31, 1994, 1993, and
1992, the Company contributed 151,608, 116,202, and 39,276 shares of common
stock to the ESOP valued at $98,006, $158,064, and $114,403, respectively.
Employee contributions to the ESOP during the year ended December 31, 1992
totaled $45,862, of which $39,666 was used to purchase 10,372 shares and $6,196
was invested in money market funds; and during the year ended December 1993,
contributions totaled $71,645, of which $2,744 was used to purchase 1,561 shares
and $68,901 was invested in mutual funds; and during the year ended December 31,
1994, contributions totaled $73,222 of which $2,535 was used to purchase 2,972
shares, and $70,687 was invested in mutual funds.
 
  (d) Stock Award Amortization/Cancellation
 
     The Company amortizes stock award compensation expense for the difference
between the issuance or exercise price of stock options granted and the fair
market value of the common stock on the date of the grant, over the period
benefited. SARs are treated in the same manner, however, a further amortization
expense (or credit to expense) is recorded for the difference between the fair
market value of the common stock at the current period end and the fair market
value on the grant date or the last fiscal period, whichever is later. In
addition, forfeited stock options for employees that terminate from the Company
prior to full vesting of their stock options are recorded as a reduction to
stock awards expense, representing the original difference between
 
                                      F-10
<PAGE>   109
 
fair market value of the common stock and the exercise price of the stock option
on the grant date, for any forfeited unvested options.
 
   
     In 1992, the Board of Directors passed a resolution that no SARs were to be
paid in cash. Accordingly, the remaining SAR holder gave up the right to cash
payment, thereby creating a reclassification from accrued liabilities to
paid-in-capital. The difference in fair market values between the date of the
original liability and the date of the Board action was recorded as a reduction
in stock award expense. During 1993, 50,000 SARs were exercised. The difference
between the fair market value of the stock as originally recorded and the market
value as of the date the SARs were exercised was recorded as a reduction of
stock award amortization of $161,000. In 1994, bonuses were paid to employees in
the form of SARs totaling 35,210 options. In addition, 223,829 SAR's were
awarded to the three Corporate Officers contingent on operational milestones.
The difference between the value of the SARs as of the date of the grant and the
zero exercise price was recorded as stock award expense of $122,000.
    
 
  (4) Income Taxes
 
   
     Statement of Financial Accounting Standards Number 109 -- Accounting for
Income Taxes ("FASB 109") was adopted by the Company as of January 1, 1992. No
provision for federal income taxes had been made since inception under the prior
accounting policy due to the operating losses incurred for both financial and
income tax purposes. At December 31, 1994, 1993 and 1992, under FASB 109, the
Company had a deferred tax asset primarily comprised of the tax benefits of net
operating loss carry-forwards and temporary differences relating to compensation
expenses as well as the benefit of general business credit carry-forwards and
the benefit of the alternative minimum tax credit carry-forwards. Because the
Company has a history of losses, a 100% provision against the deferred tax
assets has been recorded. As a result, the adoption of FASB 109 has had no
financial impact on the balance sheet or the results of operations. At December
31, 1994, the Company has a regular and alternative minimum tax net operating
loss carry-forward for federal income tax purposes of approximately $34,000,000
and $30,000,000, respectively, which if not utilized, will expire in varying
amounts through the year 2009. Additionally, the Company has a general business
credit carry-forward of approximately $633,000 at December 31, 1994, which
expires in varying amounts through December 31, 2002, if not utilized. In June
1990, the Company's NOL's were limited for purposes of general carryforward
availability and otherwise limited for specified carryforward purposes since a
change in control occurred for income tax reporting purposes.
    
 
     The federal net operating loss carry-forwards have offset any regular
federal income taxes that would have been payable on 1992 earnings. However, the
Company was subject to the alternative minimum tax and a $70,000 federal income
tax expense was recorded in 1992. Since the Company moved to New Jersey in
September 1991, the Company did not have sufficient net operating losses in the
State of New Jersey to offset its 1992 income. Accordingly, state income taxes
of $361,000 were paid for in 1992.
 
  (5) Commitments
 
     The Company is not currently a party to any material legal proceedings.
However, on February 3, 1992, a complaint was filed, and later amended, by
several former stockholders of the Company against one current director (who is
also a former officer) and two former directors/officers of the Company. The
Company was obligated, under certain circumstances, to indemnify each of the
named defendants for damages, costs and expenses, including legal fees. In March
1994, the Company agreed to contribute in principal $475,000 to the final
settlement of that litigation. Such amount was accrued as of December 31, 1993.
 
     On August 31, 1991, the Company signed an agreement to lease 7,650 square
feet to accommodate its corporate headquarters and research administration in
Fort Lee, New Jersey. The lease is for 60 months and expires August 31, 1996.
 
                                      F-11
<PAGE>   110
 
     Future minimum rental payments required under all operating leases that
have initial or remaining noncancellable lease terms in excess of one year as of
December 31, 1994, are as follows:
 
<TABLE>
            <S>                                                         <C>
            1995......................................................  $173,512
            1996......................................................   117,394
                                                                        --------
            Total.....................................................  $290,906
                                                                        ========
</TABLE>
 
     Rent expense was $201,552, $202,028 and $193,947 for the years ended
December 31, 1994, 1993 and 1992, respectively.
 
(6) RELATED PARTY TRANSACTIONS
 
     The following is a table of related party transactions for the years ended
December 31, 1994, 1993 and 1992.
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                           --------------------------------
                                                            1994        1993         1992
                                                           -------     -------     --------
    <S>                                                    <C>         <C>         <C>
    Legal fees -- Company's law firm of which a Partner
      was also a Director................................              $44,228     $181,642
    Consulting fees -- Director..........................  $26,950      54,132       29,700
    Consulting fees -- Director..........................               10,000       24,875
    Consulting fees -- Trustee of an investor............                            73,000
</TABLE>
 
     An attorney for the Company's law firm was and two consultants are members
of the Company's Board of Directors. The other Company consultant listed above
is the sole income beneficiary of a trust which is an investor in the Company.
As of July 29, 1993, the attorney did not stand for reelection to the Board and
his law firm is no longer retained by the Company.
 
(7) SALE OF ACTINEX(R) TECHNOLOGY
 
     On June 29, 1990, the Company signed a definitive agreement to sell
Actinex(R), a product developed by Chemex for the treatment and prevention of
actinic keratoses to Block. As of December 31, 1990, the Company received a
total of $2 million in non-refundable payments from Block for the sale of
Actinex(R). The Company received from Block during fiscal 1992 the following
additional milestone payments: $1 million upon receipt of the "approvable"
letter from the FDA, $3 million upon receipt of the "approval" letter from the
FDA, $2 million upon first sale of the product by Block. An additional milestone
of $2 million to be paid on the first two anniversaries of the first sale was
waived since the FDA did not grant the approval of the drug by June 29, 1992. In
its place, Block has agreed to pay a 2.3% royalty on the first $40 million of
cumulative sales of Actinex(R) (equivalent to $1 million). The Company is also
entitled to receive royalties on the sale of the product worldwide (5% on sales
in countries where the patent is protected and 2.3% on sales in countries where
the patent is not protected) after the first $40 million of cumulative sales are
achieved. The Company recorded royalties of $26,000 in 1994, $49,000 in 1993,
and $43,000 in 1992.
 
(8) BLOCK JOINT VENTURE AND SUBSEQUENT DISSOLUTION
 
     On June 20, 1991 the Company and Block entered into a Joint Venture and for
such purpose established an equally-owned New Jersey general partnership. The
objective of the Joint Venture was to develop, manufacture and market the
ensuing products developed by Joint Venture. Both companies were to share
equally in the profits of the Joint Venture.
 
     Chemex contributed all of its current dermatological products to the Joint
Venture and agreed to dedicate its current research staff to the performance of
the Joint Venture research and development of up to $17 million during the five
years of the research and development agreement. The initial $3 million of
research and development funding was paid for by Block after which each partner
was obligated to contribute 50% of research and development costs up to an
aggregate of $14 million. Each party was obligated to offer all of their
respective new dermatological products to the Joint Venture during the five year
period. In addition, under the
 
                                      F-12
<PAGE>   111
 
terms of the agreement, Block paid Chemex $2 million for certain proprietary
assets of Chemex and Block contributed such assets to the Joint Venture.
 
     As a result of entering into the Joint Venture, the Company's research and
development staff activities were directed almost exclusively to the Joint
Venture effort. The Joint Venture was developing Amlexanox (aphthous ulcers),
EPC-K (inflammation of the skin), CHX-100 (anti-wrinkling), and CHX108
(mild/moderate psoriasis).
 
     In June 1994, Block purchased 10% of the Joint Venture from Chemex (20% of
Chemex's share) for $1,700,000, thereby changing the Joint Venture ownership to
a 60/40 split in favor of Block. Chemex retained the right to re-purchase the
10% interest for up to eighteen months after the purchase of Block.
 
     Expenses for Joint Venture activities during 1994 amounted to $2,672,000,
of which $2,348,000 was expensed as research and development expense. The
balance of the reimbursement of expenses were related to indirect overhead and
were classified as general and administrative expenses. During 1994, Chemex
invoiced on a monthly basis to Block its share of Joint Venture expenses and
received payment in full within 30 days of invoicing.
 
     As of December 31, 1994, by mutual consent, Block and Chemex agreed to
terminate the Joint Venture. As part of the dissolution, Chemex returned to
Block for $1,700,000, the 10% Joint Venture ownership purchased by Block in June
1994 in return for the sale of certain proprietary rights for Amlexanox to Block
for a like amount; Block returned its 50% share of all of the Joint Venture
dermatology drug portfolio (except Amlexanox); Chemex returned its ownership
share of Penderm's Acticin to Block; and Block and Chemex entered into separate
joint ownership agreements for Amlexanox.
 
     Block and Chemex have concluded several agreements as part of the Joint
Venture dissolution: (1) Asset Distribution Agreement ("ADA") which effectively
dissolves the Joint Venture and specifies the distribution of assets of the
Joint Venture; (2) Product Development Agreement ("PDA") and Manufacturing,
Marketing and Distribution Agreement ("MMS") which establishes the joint
ownership of Amlexanox and the responsibilities of each party; and (3) a
separate agreement giving Chemex an option to transfer its share of the
ownership rights to Amlexanox to Block for a non-refundable upfront payment plus
future royalties, subject to consent by Takeda Chemicals (the licensor of
Amlexanox) and Chemex shareholder approval.
 
   
     The ADA distributes the following rights to products: Chemex -- receives
Block's share of the rights to EPC-K1, a drug under license from Senju
Pharmaceuticals for atopic dermatitis; CEDE- 108- potentially for psoriasis; and
CHX-100 for the treatment of photoaging of the skin; and Block -- receives
Chemex's share to the rights for Penederm's retinoic acid product.
    
 
     The PDA and MMS Agreements outline the responsibilities of the parties in
terms of the development and commercialization of any Amlexanox product for all
oral use. Chemex will be responsible for all development and regulatory
activities and Block will be responsible for manufacturing, marketing and
distribution of any Amlexanox products. The MMS Agreement also defines the
sharing of any profit or losses of any Amlexanox product and further allows
Chemex the option, on a country by country basis, to agree to a profit and loss
arrangement or a royalty.
 
     Lastly, the parties have agreed to give Chemex an option that expires May
30, 1995 to convert the above agreements into a royalty arrangement, whereby
Chemex will sell its share of the Amlexanox rights to Block for $2.5
non-refundable upfront payment and future royalties, subject to consent by
Takeda Chemicals (the licensor of Amlexanox) and approval by the Chemex
shareholders. This option is contingent upon Chemex receiving consent from
Takeda Chemicals (the licensor of Amlexanox) to assign all of the rights to
Amlexanox to Block Drug.
 
(9) THE SALE OF CHEMEX'S INTEREST IN AMLEXANOX (UNAUDITED)
 
     On June 7, 1995, the Company entered into an agreement with Block Drug,
Inc. to sell its rights to Amlexanox (the "Sale") for a non-refundable upfront
payment of $2,500,000 plus future royalties, if any, subject to shareholder
approval. Shareholder approval was obtained on September 14, 1995. If
shareholder
 
                                      F-13
<PAGE>   112
 
approval had not been obtained, it was probable that the Company would have
defaulted in its obligations to fund its share of the costs of commercialization
of Amlexanox and upon such default Block would have had the right to convert the
then current arrangement into a royalty arrangement, such arrangement being
without the upfront payment of $2,500,000 which was made pursuant to the Sale.
Block advanced $125,000 as of June 30, 1995 and another $125,000 in July 1995
for working capital needs while Chemex awaited shareholder approval of the Sale.
Accordingly, the prepaid royalty made to Chemex upon shareholder approval was
adjusted to a net amount of $2,250,000.
 
(10) SUBSEQUENT EVENTS (UNAUDITED)
 
   
     The Company has incurred losses in all fiscal years with the exception of
1992, the year it received FDA approval for Actinex (a drug developed by Chemex
and sold to Block in June 1990 for an upfront payment and future milestones and
royalties) which triggered milestone payments from Block of $6 million. In view
of these losses, the lack of new equity financing during the past five years,
and the dissolution of the Joint Venture with Block for dermatology, the Company
only had funds to meet its revised "burn rate" until June 1995 (see note (9)
describing the sale of Chemex's rights to Amlexanox to Block as well as advances
made by Block). The Company is actively seeking a merger partner as a means of
continuing its operations. If the Company does not complete a merger by early
fiscal 1996 as a means of continuing its operations, it may consider liquidating
its assets, even though expenses have been dramatically curtailed, including
reductions in staff effected in July 1995.
    
 
                                      F-14
<PAGE>   113
 
                          INDEPENDENT AUDITORS REPORT
 
To the Board of Directors and Stockholders
of ACCESS Pharmaceuticals, Inc.
 
     We have audited the accompanying balance sheets of ACCESS Pharmaceuticals,
Inc. (a development stage company) as of December 31, 1994 and 1993, and the
related statements of income, stockholders' equity, and cash flows for the three
year period ended December 31, 1994, and the period February 24, 1988
(Inception) through December 31, 1994. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of ACCESS Pharmaceuticals, Inc.
as of December 31, 1994 and 1993, and the results of operations and its cash
flows for each of the years in the three year period ended December 31, 1994,
and the period from February 24, 1988 (Inception) through December 31, 1994, in
conformity with generally accepted accounting principles.
 
     The accompanying financial statements have been prepared assuming that the
Company will continue as a going concern. As discussed in Note 1 to the
financial statements, the Company's significant operating losses and lack of new
equity financing or funding raises substantial doubt about its ability to
continue as a going concern. The financial statements do not include any
adjustments that might result from the outcome of this uncertainty.
 
                                          Smith, Anglin & Co.
 
Dallas, Texas
September 21, 1995
 
                                      F-15
<PAGE>   114
 
                          ACCESS PHARMACEUTICALS, INC.
                         (A DEVELOPMENT STAGE COMPANY)
 
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                               DECEMBER 31,
                                                      SEPTEMBER 30,     ---------------------------
                                                          1995             1994            1993
                                                      -------------     -----------     -----------
                                                       (UNAUDITED)  
                                                                    
                                                                    
<S>                                                   <C>               <C>             <C>
ASSETS
Current Assets:
Cash and cash equivalents...........................   $         --     $   533,456     $   367,327
Accounts receivable.................................        138,442             257             239
Accrued interest receivable.........................             --              --             112
Prepaid expenses and other assets...................            100          19,728             100
                                                        -----------     -----------     -----------
  Total Current Assets..............................        138,542         553,441         367,778
Property and Equipment, net.........................        365,252         453,428         482,593
Patents and Applicants, net of amortization of
  $4,185 in 1995, $4,921 in 1994 and $3,497 in
  1993..............................................        247,812         251,997         226,344
Other Assets, net...................................          2,042           2,460           1,793
                                                        -----------     -----------     -----------
          Total Assets..............................   $    753,648     $ 1,261,326     $ 1,078,508
                                                        ===========     ===========     ===========
                               LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable and accrued expenses.............   $    117,717     $    78,814     $    71,496
  Unearned revenue..................................             --         180,000              --
  Current portion of obligations under capital
     leases.........................................        159,236         118,306              --
                                                        -----------     -----------     -----------
          Total Current Liabilities.................        276,953         377,120          71,496
  Obligations under capital leases, net of current
     portion........................................        245,472         353,426              --
                                                        -----------     -----------     -----------
          Total Liabilities                                 522,425         730,546          71,496
Stockholders' Equity:
  Common stock, $.01 par value; authorized
     10,000,000 shares; outstanding 2,925,983,
     2,918,328 and 2,918,328 shares.................         36,149          29,183          29,183
  Additional paid-in capital........................      3,410,553       3,247,519       3,247,519
  Deficit accumulated during the development
     stage..........................................     (3,215,479)     (2,745,922)     (2,269,690)
                                                        -----------     -----------     -----------
          Total Stockholder's Equity................        231,223         530,780       1,007,012
                                                        -----------     -----------     -----------
          Total Liabilities and Stockholders'
            Equity..................................   $    753,648     $ 1,261,326     $ 1,078,508
                                                        ===========     ===========     ===========
</TABLE>
 
                       See Notes to Financial Statements
 
                                      F-16
<PAGE>   115
 
                          ACCESS PHARMACEUTICALS, INC.
                         (A DEVELOPMENT STAGE COMPANY)
 
                            STATEMENT OF OPERATIONS
 
<TABLE>
<CAPTION>                       NINE MONTHS ENDING     
                                  SEPTEMBER 30,                   YEAR ENDED DECEMBER 31,          FEBRUARY 24, 1988
                            --------------------------    ---------------------------------------    (INCEPTION) TO
                               1995           1994          1994          1993           1992      SEPTEMBER 30, 1995
                            -----------    -----------    ---------    -----------    -----------  ------------------
                            (UNAUDITED)    (UNAUDITED)                                                (UNAUDITED)
<S>                         <C>            <C>            <C>          <C>            <C>          <C>
Revenues:
  Sponsored research and
     development
     revenues..............  $  574,937     $  225,000    $ 438,532    $        --    $   588,656      $2,596,200
  Option income............          --        300,000      600,000        322,222             --       1,872,222
                             ----------     ----------    ----------   -----------     ----------     -----------
     Total Revenues........     574,937        525,000    1,038,532        322,222        588,656       4,468,422
                             ----------     ----------    ----------   -----------     ----------     -----------
Expenses:
  Sponsored research and
     development
     expenses..............     340,730         90,176      248,319             --        588,656       2,171,780
  Proprietary research and
     development
     expenses..............     174,926        433,388      465,725        841,432        481,177       2,195,102
General and administrative
  expense..................     391,080        487,319      676,106        755,285        432,339       3,083,261
  Interest expense.........      49,631            810       18,509             --             --          68,140
  Depreciation.............      92,685         83,187      115,338        110,907         95,623         496,625
                             ----------     ----------    ----------   -----------     ----------     -----------
     Total Expenses........   1,049,052      1,094,880    1,524,097      1,707,624      1,597,795       8,014,908
                             ----------     ----------    ----------   -----------     ----------     -----------
Net Income (Loss) From
  Operations...............    (474,115)      (569,880)    (485,565)    (1,385,402)    (1,009,139)     (3,546,486)
Other Income:
  Interest and
     miscellaneous
     income................       4,558          4,770        9,333         34,096        105,717         458,229
                             ----------     ----------    ----------   -----------     ----------     -----------
Net Income (loss) Before
  Tax......................  $ (469,557)    $ (565,110)   $(476,232)   $(1,351,306)   $  (903,422)     $(3,088,257)
Provision for Income
  Taxes....................          --             --           --         32,222        (43,876)        127,222
                             ----------     ----------    ----------   -----------     ----------     -----------
Net Income (loss) After
  Tax......................  $ (469,557)    $ (565,110)   $(476,232)   $(1,383,528)   $  (859,546)     $(3,215,479)
                             ==========     ==========    ==========   ===========     ==========     ===========
Net Income (Loss) Per
  Share....................  $    (0.16)    $    (0.19)   $   (0.16)         (0.47)   $     (0.29)
                             ==========     ==========    ==========   ===========     ==========
Weighted Average Common
  Shares Outstanding.......   2,925,983      2,918,328    2,918,328      2,918,328      2,918,328
                             ==========     ==========    ==========   ===========     ==========
</TABLE>
 
                       See Notes to Financial Statements
 
                                      F-17
<PAGE>   116
 
                          ACCESS PHARMACEUTICALS, INC.
                         (A DEVELOPMENT STAGE COMPANY)
 
                       STATEMENT OF STOCKHOLDER'S EQUITY
 
<TABLE>
<CAPTION>
                                                                                         DEFICIT
                                                                                       ACCUMULATED
                                                  COMMON STOCK          ADDITIONAL       DURING
                                              ---------------------      PAID-IN       DEVELOPMENT
                                               SHARES       AMOUNT       CAPITAL          STAGE
                                              ---------     -------     ----------     -----------
<S>                                           <C>           <C>         <C>            <C>
Balance -- February 24, 1988................         --     $    --     $       --     $        --
  Common stock issued, $1.00 per share......     98,000         980         97,020
  Common stock issued, $0.25 per share......     51,000         510         12,240
  Net loss for the period February 24, 1988
     to December 31, 1988...................                                               (30,198)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1988................    149,000       1,490        109,260         (30,198)
  Common stock issued, $1.00 per share......     29,000         290         28,710
  Common stock issued, $5.00 per share......     25,000         250        124,250
  Common stock issued, $0.01 per share......    650,000       6,500             --
  Stock split (Two shares issued for each
     one share held)........................  1,706,000      17,060        (17,060)
  Net loss for the year.....................                                              (191,631)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1989................  2,559,000      25,590        245,160        (221,829)
  Common stock issued, $3.00 per share......     71,001         710        212,294
  Common stock issued, $7.82 per share......    284,527       2,845      2,222,156
  Common stock grant........................      1,800          18          5,482
  Net loss for the year.....................                                              (218,498)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1990................  2,916,328      29,163      2,685,092        (440,327)
  Common stock issued, $3.00 per share......      2,000          20          5,980
  Additional paid-in-capital equipment......                               467,433
  Net income for the year...................                                               413,711
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1991................  2,918,328      29,183      3,158,505         (26,616)
  Additional paid-in-capital equipment......                                89,014
  Net loss for the year.....................                                              (859,546)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1992................  2,918,328      29,183      3,247,519        (886,162)
  Net loss for the year.....................                                            (1,383,528)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1993................  2,918,328      29,183      3,247,519      (2,269,690)
  Net loss for the year.....................                                              (476,232)
                                              ---------     -------     ----------     ------------
Balance -- December 31, 1994................  2,918,328     $29,183     $3,247,519     $(2,745,922)
                                              =========     =======     ==========     ============
</TABLE>
 
                       See Notes to Financial Statements
 
                                      F-18
<PAGE>   117
 
                          ACCESS PHARMACEUTICALS, INC.
                         (A DEVELOPMENT STAGE COMPANY)
 
                             STATEMENT OF CASH FLOW
 
<TABLE>                                                   
<CAPTION>                          NINE MONTHS ENDING     
                                      SEPTEMBER 30,                YEAR ENDED DECEMBER 31,          FEBRUARY 24, 1988
                                -------------------------   -------------------------------------     (INCEPTION) TO
                                   1995          1994         1994         1993          1992       SEPTEMBER 30, 1995
                                -----------   -----------   ---------   -----------   -----------   ------------------
                                (UNAUDITED)   (UNAUDITED)                                              (UNAUDITED)
<S>                             <C>           <C>           <C>         <C>           <C>           <C>
Cash Flows From Operating
  Activities:
Net income/loss...............   $(469,557)    $(565,110)   $(476,232)  $(1,383,528)  $  (859,546)     $ (3,215,479)
Adjustments to reconcile net
  income/loss to net cash used
  in operating activities:
  Depreciation and
     amortization of assets...      92,685        83,187      115,338       110,907        95,623           497,011
  Change in assets and
     liabilities:
     Accounts receivable......    (138,185)       (4,930)         (18)       29,136       (27,141)         (138,442)
     Accrued interest
       receivable.............          --           112          112        13,775        (4,887)               --
     Prepaid expenses and
       other assets...........      19,628            --      (19,628)           --          (418)             (518)
     Other assets.............         418          (667)        (667)           --            --            (1,624)
     Accounts payable and
       accrued expenses.......      38,903       (36,236)       7,318        18,475        (1,454)          117,717
     Deferred income taxes....          --            --           --            --       (43,876)               --
     Unearned revenue.........    (180,000)      115,000      180,000            --      (298,666)               --
                                -----------   -----------   ---------   -----------   -----------   ------------------
       Total adjustments......    (259,236)       73,279     (167,117)       61,386      (376,442)          (22,867)
                                -----------   -----------   ---------   -----------   -----------   ------------------
Net Cash (Used In) Operating
  Activities..................    (636,108)     (408,644)    (193,777)   (1,211,235)   (1,140,365)       (2,741,335)
Cash Flows From Investing
  Activities:
  Capital expenditures........        (324)      (81,881)     (81,253)      (12,846)     (140,098)         (847,727)
  Marketable securities.......          --            --           --     1,203,625      (603,625)               --
  Capitalized patent costs....          --        (2,396)     (30,573)      (93,641)      (24,173)         (262,349)
                                -----------   -----------   ---------   -----------   -----------   ------------------
Net Cash Provided by (Used In)
  Investing Activities........        (324)      (84,277)    (111,826)    1,097,138      (767,896)       (1,110,076)
Cash Flows From Financing
  Activities
  Proceeds from notes
     payable..................          --       502,248      502,248            --            --           502,248
  Repayment of notes
     payable..................     (67,024)       (4,510)     (30,516)           --            --           (97,540)
  Proceeds from stock
     issuance.................     170,000            --           --            --            --         2,890,255
  Proceeds from capital
     equipment................          --            --           --            --        89,014           556,448
                                -----------   -----------   ---------   -----------   -----------   ------------------
Net Cash Provided By Financing
  Activities..................     102,976       497,738      471,732            --        89,014         3,851,411
                                -----------   -----------   ---------   -----------   -----------   ------------------
Net Increase (Decrease) in
  Cash and Cash Equivalents...    (533,456)        4,817      166,129      (114,097)   (1,819,247)               --
Cash and Cash Equivalents At
  Beginning of Period.........     533,456       367,327      367,327       481,424     2,300,671                --
                                -----------   -----------   ---------   -----------   -----------   ------------------
Cash and Cash Equivalents At
  End of Period...............   $      --     $ 372,144    $ 533,456   $   367,327   $   481,424      $         --
                                 =========     =========    =========    ==========    ==========    ==============
Cash Paid for Interest........      49,631           810       18,510            --            --            68,141
Cash Paid for Income Taxes....          --            --           --        32,222            --           127,222
</TABLE>
 
                       See Notes to Financial Statements
 
                                      F-19
<PAGE>   118
 
                          ACCESS PHARMACEUTICALS, INC.
                         (A DEVELOPMENT STAGE COMPANY)
 
                         NOTES TO FINANCIAL STATEMENTS
                        DECEMBER 31, 1994, 1993 AND 1992
 
NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 
     Business -- ACCESS Pharmaceuticals, Inc. (the Company) is a company
developing enhanced parenteral therapeutics and diagnostic imaging agents
through the utilization of its patented and proprietary endothelial binding
technology which selectively targets sites of disease.
 
     The Company is in the development stage and its efforts have been
principally devoted to research and development. The Company incurred
significant losses in years 1994, 1993 and 1992. The lack of new equity
financing and/or funding from new relationships with major pharmaceutical
companies or a merger possibility will result in dramatically curtailed
operations in 1995.
 
     If the Company does not complete funding it will be unlikely that the
Company will be able to continue as a going concern. The financial statements do
not include any adjustments relating to the recoverability and classification of
recorded asset amounts or the amounts and classifications of liabilities that
might be necessary should the Company be unable to continue as a going concern.
 
     Cash and Cash Equivalents -- Cash and cash equivalents are composed of
immediately accessible funds held in bank checking accounts, money market
accounts, and highly liquid debt instruments with original maturities not
exceeding three months.
 
     Marketable Securities -- Marketable securities include obligations of
corporations and the federal government. They are carried at amortized cost
which approximates market value.
 
     Property and Equipment -- Property and equipment are recorded at cost.
Depreciation is provided using the straight-line method over the assets'
estimated useful lives of three to seven years. Assets acquired pursuant to
capital lease arrangements are amortized over the shorter of the estimated
useful lives or the lease terms.
 
     Patents and Applications -- The initial patent application costs are
capitalized. Patents and applications are amortized using the straight line
method over 17 years after the approval of the patent. All other patent costs
and fees are expensed as incurred.
 
     Revenue Recognition -- Research revenues are recognized as the expenses for
research and development activities performed under the terms of research
contracts are incurred. Advance revenues received are recorded as unearned
revenues until the related research activities are performed. Option revenues
are recognized under terms of the contract when received.
 
     Research and Development Costs -- Research and development costs are
expensed as incurred.
 
     Income Taxes -- Tax credits related to research and development and to
investments in equipment and improvements are reported as a reduction of income
tax expense in the year realized. Certain income and expense items are
recognized for financial reporting purposes in years different than for income
tax purposes.
 
     Net Loss Per Share -- Net loss per share is computed using the weighted
average of common shares outstanding during each period.
 
NOTE 2. RELATED PARTY TRANSACTIONS:
 
     Under consulting agreements between Thoma Corporation (Thoma) and the
Company, Thoma receives payments for consulting services and reimbursement of
direct expenses. Herbert H. McDade, Jr., a Director of the Company is an owner
of Thoma Corp. During 1994, 1993 and 1992 Thoma received payments for consulting
services of $1,688, $6,930 and $11,628, respectively. Thoma was also reimbursed
for consulting expenses of $2,761, $2,898 and $12,568, respectively.
 
                                      F-20
<PAGE>   119
 
     Mr. McDade's son, Mark McDade, was also a pharmaceutical consultant for the
Company. Mr. Mark McDade received payments for consulting services of $40,625
and $10,500 and reimbursements for expenses of $22,329 and $1,337 during 1993
and 1992, respectively.
 
     See also, Note 9. Commitments, for transactions regarding David F. Ranney,
Chairman, Vice President and major shareholder of the Company.
 
NOTE 3. RESEARCH AND DEVELOPMENT AGREEMENTS:
 
     On April 26, 1994, the Company entered into agreements, as amended, with
Corange International Ltd. (Corange) to develop drugs based on ACCESS'
endothelial binding technology for the use in the oncology area. Under the
agreements, the Company granted Corange an option for a period up to two years,
as defined, to exclusively license worldwide any oncology agent developed
pursuant to the terms of the common research agreement. In 1994, Corange made
initial option payments of $600,000. Corange also made $618,532 payments
representing research and equipment costs. Corange will pay research costs and
other option payments based on milestones for up to a two year period. Total
option fees and research payments will not exceed $1.86 million without
execution of a license. However, Corange can terminate the agreements with 45
days notice after the first anniversary date of the agreement.
 
     If Corange exercises its option to license a product, Corange is obligated
to pay further option fees, advance some royalty payments and pay royalties to
ACCESS on sales of such products. Total aggregate research and option fees will
approximate $6.46 million. The Corange agreement was terminated June 30, 1995.
 
     An option agreement with a major international pharmaceutical company
accounted for 100% of the option income for 1993. The agreement is limited to
the license of one product in a specified geographical area.
 
     A joint research agreement with a major international pharmaceutical
company accounted for 100% of the research and development revenues in 1992.
This joint research agreement was terminated by the sponsor effective July 31,
1992.
 
NOTE 4. PROPERTY AND EQUIPMENT:
 
     Property and Equipment is recorded at cost. Depreciation is provided using
the straight-line method over the assets' estimated useful lives of three to
seven years. Assets acquired pursuant to capital lease arrangements are
amortized over the shorter of the estimated useful lives or the lease terms.
Property and equipment consists of the following:
 
<TABLE>
<CAPTION>
                                                                         DECEMBER 31,
                                                                     ---------------------
                                                                       1994         1993
                                                                     --------     --------
    <S>                                                              <C>          <C>
    Laboratory equipment...........................................  $441,922     $645,994
    Laboratory and building improvements...........................    14,353       16,459
    Furniture and equipment........................................    54,118      102,133
                                                                     --------     --------
                                                                      510,393      764,586
    Less accumulated depreciation..................................    56,965      281,933
                                                                     --------     --------
    Net property and equipment.....................................  $453,428     $482,593
                                                                     ========     ========
</TABLE>
 
     Depreciation and amortization expense was $110,417, $107,410 and $94,359
for the years ended December 31, 1994, 1993 and 1992, respectively.
 
NOTE 5. OBLIGATIONS UNDER CAPITAL LEASES:
 
     In September 1994, the Company entered into a master lease agreement for
financing $426,432 in existing laboratory equipment, furniture and office
equipment and is payable in 42 monthly installments. The
 
                                      F-21
<PAGE>   120
 
loan is collateralized by the equipment and furniture. The agreement allows for
the purchase of the equipment at the end of the lease term at $42,643. The
Company also issued a warrant to purchase 35,536 shares of the Company's common
stock at an exercise price of $4.20 per share, subject to adjustment, as part of
the transaction.
 
     No value was assigned to the warrant because its value was de minimis.
Future principal note payments under the master loan agreement total $405,083,
net of interest of $116,832, as follows: $93,701 in 1995, $108,550 in 1996,
$125,752 in 1997 and $77,080 in 1998.
 
     Also during 1994 the Company entered into two other capital lease
agreements with large leasing companies for an aggregate obligation of $75,815.
The terms of these leases are 36 months and allow for the purchase of the
equipment at the end of the lease term at a price not to exceed 10 percent of
the purchase price at inception for one lease and fair market value for the
other lease. Future payments under all capital lease obligations total $66,648,
net of interest of $10,253, as follows: $24,605 in 1995, $24,605 in 1996 and
$17,438 in 1997.
 
NOTE 6. STOCKHOLDERS' EQUITY:
 
     The Company has a Stock Awards Plan -- Common Stock and a Stock Awards
Plan -- Options, as amended, under which up to 1,000,000 shares of common stock
and options may be awarded to the Company's employees, directors and
consultants. At December 31, 1994 no shares of common stock had been awarded
under the stock plan. Shares awarded generally vest immediately.
 
     The Company's option plan for incentive and nonqualified stock options
expire on dates up to ten years after the date of the grant. Options to purchase
455,500 shares at various prices between $.25 and $2.40 per share have been
granted under the plan; none have been exercised; and as of December 31, 1994,
300,000 options are exercisable.
 
     No dividends have been paid or declared by the Company.
 
     The Company is authorized to issue 1,000,000 shares of $.10 par value
preferred stock, none of which is currently outstanding.
 
     Under the terms of the 1994 lease agreement (described in Note 5), the
leasing company received a warrant to purchase 35,536 shares of common stock.
The warrant remains exercisable for seven years from the date of issuance and
will expire on September 19, 2001. The warrant is exercisable at $4.20 per
share. The warrant may be adjusted under some conditions, as defined, for
dividends, changes in stock price, reorganization, consolidation or merger and
extraordinary events. No value was assigned to the warrant because its value was
de minimis.
 
NOTE 7. INCOME TAXES:
 
     Deferred income tax expense results from timing differences in the
recognition of revenue and expense for tax and financial reporting purposes. Due
to net losses in 1994, 1993 and 1992 there is currently no deferred income tax
liability. Because the Company has a history of losses, a 100% provision against
the deferred tax assets has been recorded. As a result, the adoption of the
Statement of Financial Accounting Standards Number 109 -- Accounting for Income
Taxes, has had no financial impact on the balance sheet or the results of
operations. At December 31, 1994, the Company had $2,385,563 in federal net
operating loss carryforwards and $132,376 in research and development tax
credits to carryforward and offset future tax liabilities. Both the operating
loss carryforwards and credits mentioned above will expire beginning in years
2005 to 2008.
 
                                      F-22
<PAGE>   121
 
NOTE 8. LEASE OBLIGATIONS:
 
     The Company leases office and research and development facilities under an
operating lease. Rent expense for the years ended December 31, 1994, 1993 and
1992 was $50,225, $46,019 and $34,359. The minimum rental commitment on the
lease as of December 31, 1994 aggregates to $107,147. Future minimum rentals
required by this lease as of December 31, 1994 is for the following calendar
years:
 
              1995 -- $58,601
              1996 -- $48,546
 
NOTE 9. COMMITMENTS:
 
     Under the terms of the "Patent Purchase Agreement" between Dr. David F.
Ranney and the Company dated April 5, 1994, Dr. Ranney, Chairman and Vice
President Research & Development and majority stockholder is entitled to yearly
cash royalty payments as consideration for the assignment of patents to the
Company and termination of a previous license agreement. Dr. Ranney received on
April 5, 1994 the first payment of $7,500 and on January 31, 1995 a second
payment of $15,000. Payments are scheduled each year on January 31st of $25,000,
$50,000 and $75,000 for years 1996, 1997 and 1998, respectively. Payments of
$150,000 each year are scheduled for years 1998 and 1999 and payments of
$200,000 a year are scheduled each year after that for as long as one or more of
the Patents is still in force. For calendar year 1998 and thereafter, the
Company will also pay Dr. Ranney a royalty of three quarters of one percent
(0.075%) of gross revenues in excess of $20 million ($26.5 million for calendar
year 2000 and thereafter) in any way derived from patents and substitutions for
the patents.
 
     Under the terms of the "Exclusive Technology License Agreement" between Dr.
David F. Ranney and the Company, terminated April 5, 1994, Dr. Ranney, was
entitled to royalties equal to the greater of: (i) four percent (4%) of its Net
Product Revenues (as defined), or (ii) one percent (1%) of Gross Product
Revenues (as defined). No payments were made under this agreement in 1994, 1993
and 1992.
 
                                      F-23
<PAGE>   122
 
EXHIBIT A
 
                              AMENDED AND RESTATED
                            AGREEMENT OF MERGER AND
                             PLAN OF REORGANIZATION
 
                                    BETWEEN
 
                          ACCESS PHARMACEUTICALS, INC.
 
                                      AND
 
                          CHEMEX PHARMACEUTICALS, INC.
 
                          DATED AS OF OCTOBER 31, 1995
<PAGE>   123
 
                              AMENDED AND RESTATED
                 AGREEMENT OF MERGER AND PLAN OF REORGANIZATION
 
     AGREEMENT OF MERGER AND PLAN OF REORGANIZATION (the "Agreement"),
originally dated as of October 3, 1995, and amended and restated as of October
31, 1995, by and between ACCESS Pharmaceuticals Inc., a corporation organized
and existing under the laws of the State of Texas ("ACCESS"), and Chemex
Pharmaceuticals, Inc., a corporation organized and existing under the laws of
the State of Delaware ("CHEMEX").
 
                                    RECITALS
 
       I) The Board of Directors of each of ACCESS and CHEMEX, deeming it
advisable for the mutual benefit of ACCESS and CHEMEX and their respective
stockholders that ACCESS be merged with and into CHEMEX (the "Merger"), have
approved this Agreement.
 
      II) The Board of Directors of each of ACCESS and CHEMEX have determined
that it would also be desirable and in the best interests of their respective
corporations and stockholders that, immediately prior to the Effective Time (as
hereinafter defined) of the Merger, (i) CHEMEX amend its Certificate of
Incorporation by filing a Certificate of Amendment substantially in the form of
the attached Exhibit A (the "Charter Amendment"), such that CHEMEX's authorized
capital stock will consist of 40,000,000 shares of Common Stock, $0.04 par value
per share ("CHEMEX Common Stock"), and 10,000,000 shares of preferred stock,
$0.01 par value per share, and (ii) CHEMEX amend its Certificate of
Incorporation by filing the Charter Amendment to change its corporate name to
ACCESS Pharmaceuticals, Inc. (the "Name Change").
 
     III) The parties intend that the Merger shall qualify as a tax-free
reorganization within the meaning of section 368(a) of the Internal Revenue Code
of 1986, as amended (the "Code").
 
      IV) The parties also desire to make certain representations, warranties
and agreements in connection with the Merger and also to establish certain
conditions to consummation of the Merger.
 
     Now, therefore in consideration of the foregoing premises and mutual
covenants, agreements, representations and warranties herein contained, and for
the purpose of setting forth certain terms and conditions of the Merger, and the
mode of carrying the same into effect, ACCESS and CHEMEX hereby agree as
follows:
 
                                       A-1
<PAGE>   124
 
                                   ARTICLE 1
 
                           MERGER AND RELATED MATTERS
 
     0.1. THE MERGER.  Subject to the terms and conditions of Articles 6 and 7
of this Agreement, a closing (the "Closing") shall be held at the offices of
Bingham, Dana & Gould, 150 Federal Street, Boston, Massachusetts 02110, within
five business days after the satisfaction of the conditions precedent set forth
in Articles 6 and 7, or on such other date prior to the termination referred to
in Article 14, and at such other place, as may be agreed to by the parties (the
"Closing Date").
 
     1.2. EFFECT OF THE MERGER.  At the Effective Time, pursuant to this
Agreement and the Delaware Certificate of Merger and the Texas Articles of
Merger (each as hereinafter defined):
 
          (a) ACCESS shall be merged with and into CHEMEX and the separate
     existence of ACCESS shall cease. CHEMEX, as the Surviving Corporation,
     shall possess all the assets, properties, rights, privileges, powers and
     franchises, of a public or of a private nature, and be subject to all
     liabilities, restrictions, disabilities and duties of ACCESS. If at any
     time the Surviving Corporation shall consider or be advised that any
     further assignment or assurances in law or any things are necessary or
     desirable to vest in the Surviving Corporation, according to the terms
     hereof, the title to any property or rights of ACCESS, the last acting
     officers and directors of such corporation, as the case may be, or the
     corresponding officers and directors of the Surviving Corporation shall
     execute and make all such proper assignments and assurances and do all
     things necessary or proper to vest title in such property or rights in the
     Surviving Corporation, and otherwise to carry out the purposes of this
     Agreement. The name of the Surviving Corporation shall be changed to ACCESS
     Pharmaceuticals, Inc.
 
          (b) CHEMEX shall continue as the Surviving Corporation organized under
     the laws of the State of Delaware, the authorized capital stock of which
     shall be as set forth in the Certificate of Incorporation of CHEMEX, as
     amended and in effect on the Effective Date, which shall be the Certificate
     of Incorporation of CHEMEX in effect on the date hereof, as amended by the
     Charter Amendment, and shall thereafter continue to be its Certificate of
     Incorporation until duly amended or repealed.
 
          (c) The by-laws of CHEMEX, as heretofore amended and as in effect
     immediately prior to the Effective Time, shall be the by-laws of the
     Surviving Corporation ("By-laws") and shall thereafter continue to be its
     By-laws until duly amended or repealed.
 
          (d) Each share of ACCESS's Common Stock, $0.01 par value per share
     ("ACCESS Stock") issued and outstanding immediately prior to the Effective
     Time (other than any such shares held directly or indirectly by CHEMEX or
     ACCESS or by the dissenting stockholders referred to in Section 2.2(d)
     below) shall by virtue of the Merger become and be converted into 3.7487
     shares (subject to the payment of cash adjustments in lieu of the issuance
     of fractional shares as provided in Section 2.2(h) herein and as adjusted
     as described in the remainder of this sentence, the "Conversion Number") of
     CHEMEX Common Stock, subject to adjustment as provided in Section 2.1
     below; provided, however, that if at the Effective Time the Total Cash
     Assets of CHEMEX is less than the Minimum Cash Assets, then, for each one
     dollar that the Total Cash Assets are less than the Minimum Cash Assets,
     each share of ACCESS Stock shall by virtue of the Merger become and be
     converted into an additional .0000003635 shares of CHEMEX Common Stock
     (subject to the payment of cash adjustments in lieu of the issuance of
     fractional shares as provided in Section 2.2(h) herein). As of the
     Effective Time, each share of ACCESS Common Stock shall be canceled and
     shall cease to exist, and no payment shall be made with respect thereto.
 
          (e) From and after the Effective Time, the respective officers and
     members of the Board of Directors of the Surviving Corporation will consist
     of those persons named as such in the Delaware Certificate of Merger, each
     such person to hold office, subject to the applicable provisions of the
     Certificate of Incorporation and the By-laws of the Surviving Corporation,
     until the next annual meeting of the directors or stockholders, as the case
     may be, of the Surviving Corporation and until his or her successor shall
     be duly elected or appointed and shall duly qualify.
 
                                       A-2
<PAGE>   125
 
          (f) After the Effective Time, each Warrant to purchase ACCESS Stock
     (an "ACCESS Warrant") that is outstanding immediately prior to the
     Effective Time shall be deemed to be a Warrant to purchase from the
     Surviving Corporation up to that whole number of shares of CHEMEX Common
     Stock determined by multiplying the number of shares of ACCESS Stock
     subject to such Warrant by the Conversion Number, at a price per share of
     CHEMEX Common Stock determined by dividing the purchase price per share of
     ACCESS Common Stock provided for in such Warrant by the Conversion Number.
     No scrip or fractional shares shall be issued in connection with the
     exercise of any ACCESS Warrant. Except for the foregoing, each such ACCESS
     Warrant shall remain subject after the Effective Time to the same terms and
     conditions as were applicable to such ACCESS Warrant immediately prior to
     the Effective Time. ACCESS hereby represents and warrants to CHEMEX that
     the aggregate number of shares of ACCESS Stock subject to outstanding
     ACCESS Warrants is not greater than 48,036 as of the date hereof, and
     agrees not to issue any additional ACCESS Warrants.
 
          (g) The principal place of business and operations of the Surviving
     Corporation will be in Dallas, Texas.
 
     1.3 FILING OF CERTIFICATE OF MERGER.  On the Closing Date, CHEMEX and
ACCESS shall execute and deliver to each other a Certificate of Merger
substantially in the form of Exhibit B-1 attached hereto (the "Delaware
Certificate of Merger") and Articles of Merger substantially in the form of
Exhibit B-2 attached hereto (the "Texas Articles of Merger"), and shall cause
the Delaware Certificate of Merger to be filed with the Delaware Secretary of
State and the Recorder for the County of New Castle, Delaware, in order to cause
the Merger contemplated by this Agreement to become effective under the laws of
the State of Delaware, and shall cause the Texas Articles of Merger to be filed
with the Texas Secretary of State, in order to cause the Merger contemplated by
this Agreement to become effective under the laws of the State of Texas and will
take such other and further actions in connection therewith as may be required
by Texas or Delaware law to make the Merger effective as soon as practicable
thereafter. The Merger shall become effective on the date and at the time of the
later of (i) the date and time when the filing of the Delaware Certificate of
Merger with the Delaware Secretary of State has occurred, and (ii) the date and
time when the filing of the Texas Articles of Merger with the Texas Secretary of
State has occurred (the "Effective Time"). References herein to the "Surviving
Corporation" shall mean CHEMEX at and after the Effective Time. The Merger shall
become effective at the time such filings are made (the "Effective Time").
 
                                   ARTICLE 2
 
                          ANTIDILUTION; PAYMENTS, ETC.
 
     2.1. ANTIDILUTION.  In the event that, subsequent to the date of this
Agreement but prior to the Effective Time, the shares of CHEMEX Common Stock or
ACCESS Stock issued and outstanding as of the date of this Agreement shall have
been increased, decreased, or changed into or exchanged for a different number
or kind of shares or securities through reorganization, recapitalization,
reclassification, stock dividend, stock split, reverse stock split, or other
similar changes in CHEMEX's or ACCESS's capitalization, then an appropriate and
proportionate adjustment shall be made to the Conversion Number so that each
holder of ACCESS Stock immediately prior to the Effective Time shall receive
pursuant to Section 1.2(d) hereof: (a) in the event of any such change with
respect to ACCESS Stock, that number of shares of CHEMEX Common Stock (except
for fractional shares) that such holder would have received if such change had
never occurred, and (b) in the event of any such change with respect to CHEMEX
Common Stock, that number of shares of CHEMEX Common Stock (except for
fractional shares) that such holder would have received as a result of such
change if such change had occurred immediately after the Effective Time (and
such holders were treated for purposes of such change as holders of CHEMEX
Common Stock).
 
     2.2. PROCEDURES; FRACTIONAL SHARES, ETC.
 
          (a) Certificates that represent shares of ACCESS Stock that are
     outstanding immediately prior to the Effective Time (each a "Certificate")
     and are converted into shares of CHEMEX Common Stock pursuant to Section
     1.2(d) shall, after the Effective Time, be deemed to represent the shares
     of the
 
                                       A-3
<PAGE>   126
 
     CHEMEX Common Stock into which such shares have been converted and shall be
     exchangeable by the holders thereof in the manner provided in paragraphs
     (b) and (c) below for new certificates representing the shares of CHEMEX
     Common Stock into which such shares have been converted.
 
          (b) As promptly as practicable after the Effective Time, CHEMEX or its
     transfer agent for CHEMEX Common Stock shall send to each holder of record
     of shares of ACCESS Stock (other than any such shares held directly or
     indirectly by CHEMEX or ACCESS) outstanding at the Effective Time (the
     "ACCESS Stockholders"), transmittal materials for use in exchanging the
     Certificates for such shares for certificates for the shares of CHEMEX
     Common Stock into which such shares of ACCESS Stock have been converted
     pursuant to Section 1.2(d). Upon surrender of a Certificate to CHEMEX (or
     the transfer agent for CHEMEX Common Stock), together with a duly executed
     letter of transmittal and any other required documents, the holder of such
     Certificate shall be entitled to receive, in exchange therefor, a
     certificate for the number of shares of CHEMEX Common Stock to which such
     holder is entitled, and such Certificate shall forthwith be canceled.
 
          (c) No dividend or other distribution payable after the Effective Time
     with respect to CHEMEX Common Stock shall be paid to the holder of any
     unsurrendered Certificate until the holder thereof surrenders such
     Certificate, at which time such holder shall receive all dividends and
     distributions, without interest thereon, previously payable but withheld
     from such holder pursuant hereto. After the Effective Time, there shall be
     no transfers on the stock transfer books of ACCESS of shares of ACCESS
     Stock. If, after the Effective Time, Certificates are presented to the
     Surviving Corporation or its transfer agent for CHEMEX Common Stock for
     transfer, they shall be canceled and exchanged for the shares of CHEMEX
     Common Stock deliverable in respect thereof as determined in accordance
     with the provisions and procedures set forth in Section 1.2(d) and this
     Section 2.2 (or returned to the presenting Person, if the shares of ACCESS
     Stock formerly represented by such Certificate are held of record by a
     former ACCESS stockholder who has duly exercised the appraisal rights
     described in Section 2.2(e) below).
 
          (d) After the Effective Time, holders of ACCESS Stock shall cease to
     be, and shall have no rights as, stockholders of ACCESS, other than (i) to
     receive shares of CHEMEX Common Stock into which such shares have been
     converted pursuant to the provisions hereof and (ii) the rights afforded to
     any such holder who has demanded appraisal rights in compliance with all
     provisions of the Texas Business Corporation Act concerning the right of
     such holder to dissent from the Merger and demand appraisal of such shares
     of ACCESS Stock.
 
          (e) Neither CHEMEX nor ACCESS nor any other Person shall be liable to
     any former holder of shares of ACCESS Stock for any shares or any dividends
     or distributions with respect thereto properly delivered to a public
     official pursuant to applicable abandoned property, escheat, or similar
     laws.
 
          (f) In the event that any Certificate shall have been lost, stolen, or
     destroyed, upon receipt of appropriate evidence as to such loss, theft, or
     destruction and to the ownership of such Certificate by the person claiming
     such Certificate to be lost, stolen, or destroyed, and the receipt by the
     Surviving Corporation or its transfer agent for CHEMEX Common Stock of
     appropriate and customary indemnification, the Surviving Corporation or
     such transfer agent will issue in exchange for such lost, stolen, or
     destroyed Certificate the shares of CHEMEX Common Stock, deliverable in
     respect thereof as determined in accordance with Section 1.2(d) and this
     Section 2.2.
 
          (g) If any certificate representing shares of CHEMEX Common Stock is
     to be issued in a name other than that in which the Certificate surrendered
     in exchange therefor is registered, it shall be a condition to the issuance
     thereof that the Certificate so surrendered shall be properly indorsed (or
     accompanied by an appropriate instrument of transfer) and otherwise in
     proper form for transfer (including without limitation that the signature
     of the transferor shall be properly guaranteed by a commercial bank, trust
     company or member firm of the New York Stock Exchange), and that the Person
     requesting such exchange shall pay to the Surviving Corporation in advance
     any transfer or other taxes required by reason of the issuance of a
     certificate representing shares of CHEMEX Common Stock in any name other
     than that of the registered holder of the Certificate surrendered, or
     required for any other
 
                                       A-4
<PAGE>   127
 
     reason, or shall establish to the satisfaction of the Surviving Corporation
     that such tax has been paid or is not payable.
 
          (h) In lieu of the issuance of fractional shares of Chemex Common
     Stock pursuant to Section 1.2(d), cash adjustments, without interest, will
     be paid to the holders of ACCESS Stock in respect of any fractional share
     of Chemex Common Stock that would otherwise be issuable and the amount of
     such cash adjustment shall be equal to an amount equal to an amount in cash
     determined by multiplying such holder's fractional interest by $0.75. For
     purposes of determining whether, and in what amounts, a particular holder
     of ACCESS Stock would be entitled to receive cash adjustments under this
     Section 2.2(h), shares of record held by such holder and represented by two
     or more certificates shall be aggregated.
 
                                       A-5
<PAGE>   128
 
                                   ARTICLE 3
 
                         REPRESENTATIONS AND WARRANTIES
 
     Each of ACCESS and CHEMEX hereby represents and warrants to the other as
follows (subject in each case to the exceptions set forth in the representing
party's attached Disclosure Schedule in the labeled section corresponding to the
caption of the representation or warranty to which such exceptions relate):
 
     3.1. CORPORATE ORGANIZATION.  It is a corporation duly organized, validly
existing and in good standing under, in the case of ACCESS, the laws of the
State of Texas, and in the case of CHEMEX, the laws of the State of Delaware;
has full corporate power and authority to carry on its business as it is now
being conducted and to own, lease or operate its properties and assets; is duly
qualified or licensed to do business in good standing in every jurisdiction in
which the character or location of the properties and assets owned, leased or
operated by it or the conduct of its business requires such licensing or
qualification, and has heretofore delivered to the other party complete and
correct copies of its certificate of incorporation and by-laws, as presently in
effect.
 
     3.2. SUBSIDIARIES.  It does not have any Subsidiaries or own any legal
and/or beneficial interests in any partnerships, business trusts or joint
ventures or in any other unincorporated trade or business enterprises.
 
     3.3. CAPITALIZATION.  Its authorized and outstanding capital stock are as
set forth in Section 3.3 of its Disclosure Schedule, and in the case of ACCESS,
all such outstanding shares are owned of record and, to the best of its
knowledge, beneficially, as of the date of this Agreement by the Persons and in
the amounts listed in Section 3.3(a) of its Disclosure Schedule. All such issued
and outstanding shares of capital stock are duly authorized, validly issued,
fully paid and nonassesable. Except as set forth in Section 3.3(b) of its
Disclosure Schedule or as contemplated by this Agreement, it does not have and
is not bound by any (i) outstanding subscriptions, options, warrants, calls,
commitments, or agreements of any character calling for it to issue, deliver or
sell, or cause to be issued, delivered or sold, any shares of its capital stock
or any other equity security of it, or any securities described in the following
clause, or (ii) securities convertible into, exchangeable for, or representing
the right to subscribe for, purchase, or otherwise receive any shares of its
common stock or any other equity security of it, or obligating it to grant,
extend, or enter into any such subscriptions, options, warrants, calls,
commitments, or agreements. Except as set forth in Section 3.3(c) of its
Disclosure Schedule, as of the date hereof it (i) does not have any outstanding
obligations, contractual or otherwise, to repurchase, redeem, or otherwise
acquire any shares of its capital stock, (ii) is not a party to and is not bound
by, and does not have knowledge of, any agreement or instrument relating to the
voting of any of its voting securities, or (iii) is not a party to and is not
bound by any agreement or instrument under which any Person has the right to
require it to effect, or to include any securities held by such Person in, any
registration under the Securities Act of 1933, as amended (the "Securities
Act").
 
     3.4. POWER AND AUTHORITY.  It has full corporate power and authority to
enter into this Agreement and to carry out the transactions contemplated hereby.
Its Board of Directors have taken all action required by law, its charter, its
by-laws or otherwise to authorize the execution and delivery of this Agreement
and the transactions contemplated hereby. This Agreement has been duly and
validly executed and delivered by it. It will cause a shareholder meeting to
take place prior to, in the case of ACCESS, December 31, 1995, and in the case
of CHEMEX, January 30, 1996 (subject to extension only for any delays caused by
or associated with the review and clearance by the SEC of the Registration
Statement (as herein defined) and the review and clearance by any applicable
government agency or instrumentality of any applicable state with regard to the
Blue Sky Filings and only for the number of days directly attributable to any
such delays), to approve the transactions contemplated by this Agreement. This
Agreement is a valid and binding obligation of it enforceable against it in
accordance with its terms, except to the extent that: (i) the enforcement of
certain rights and remedies created by this Agreement is subject to bankruptcy,
insolvency, reorganization and similar laws of general application affecting the
rights and remedies of the parties, and (ii) the enforceability of any
particular provision of this Agreement under principles of equity or the
availability of equitable remedies, such as specific performance, injunctive
relief, waiver or other equitable remedies, is subject to the discretion of
courts.
 
                                       A-6
<PAGE>   129
 
     3.5. LAWFUL ISSUANCE.  All of the outstanding shares of its capital stock
were issued in compliance with (i) all applicable preemptive or similar rights
of any Person and (ii) all applicable provisions of the Securities Act and the
rules and regulations thereunder, and all applicable state securities laws and
the rules and regulations thereunder. No Person has a valid right to rescind any
purchase of any shares of capital stock of it from, or issuance thereof by, it.
 
     3.6. FINANCIAL STATEMENTS.  Attached as Section 3.6 of its Disclosure
Schedule are copies of (a) its audited balance sheets, as of December 31 in each
of the years, in the case of CHEMEX, 1992 to 1994, inclusive, and in the case of
ACCESS, 1992 to 1993 inclusive (together with unaudited statements for 1994),
and the related statements of income, changes in stockholders' equity, and cash
flows for the fiscal years ended on such dates, respectively, accompanied by an
audit report thereon of Smith, Anglin & Co., in the case of ACCESS, and KPMG
Peat Marwick, in the case of CHEMEX, and (b) its unaudited balance sheet as of
June 30, 1995, (the "Interim Balance Sheet" of the applicable party), and the
related statements of income, changes in stockholders' equity, and cash flows
for the respective periods commencing January 1, 1995 and ended on such dates
(collectively, such financial statements referred to in this clause (b), the
"Unaudited Financial Statements" of the applicable party). Except as noted in
the following sentence, each of such financial statements was prepared in
accordance with GAAP applied on a basis consistent with prior periods. The
Unaudited Financial Statements were prepared in accordance with GAAP for
unaudited interim statements, and thus do not contain all notes, year end
adjustments and prior period comparative data that are required to be prepared
in accordance with GAAP. Each of such balance sheets fairly presents its
financial condition in all material respects as of the date of such balance
sheet; and each of such statements of income, statements of changes in
stockholders' equity, and cash flows fairly presents in all material respects
the results of operations, changes in stockholders' equity, or cash flows, as
the case may be, of it for the period covered thereby.
 
     3.7. ABSENCE OF CERTAIN CHANGES.  Except as set forth in Section 3.7 of its
Disclosure Schedule, since the date of its Interim Balance Sheet, there has not
been: (a) any material change in its assets, liabilities, or business or in its
relationships with suppliers, customers, or lessors, other than changes in the
ordinary course of business that have not resulted, either in any case or in the
aggregate, in a Material Adverse Effect; (b) any transaction with any of its
Affiliates (other than the payment of compensation and reimbursement of expenses
in accordance with existing employment arrangements and usual past practices) or
any acquisition or disposition by it of any material asset or property or other
transaction other than in the ordinary course of business; (c) any damage,
destruction, or loss, whether or not covered by insurance, that, either in any
case or in the aggregate, could reasonably be expected to have a Material
Adverse Effect; (d) any declaration, setting aside, or payment of any dividend
or any other distribution in respect of any class of its capital stock; (e) any
issuance of any shares of any class of its capital stock or any direct or
indirect redemption, purchase, or other acquisition by it of any class of its
capital stock; (f) the loss of any officer or key employee of it; (g) any
increase in the compensation or other benefits payable or to become payable by
it to any of its officers or employees, or any bonus payments or arrangements
made to or with any of such officers or employees; (h) any forgiveness or
cancellation of any debt or claim by it or any waiver by it of any right of
material value, other than compromises of accounts receivable in the ordinary
course of business; (i) any entry by it into any material transaction other than
in the ordinary course of business; (j) any incurrence by it of any material
obligations or material liabilities, whether absolute, accrued, contingent, or
otherwise (including without limitation liabilities, as guarantor or otherwise,
with respect to obligations of others), other than obligations and liabilities
incurred in the ordinary course of business; (k) the incurrence of any mortgage,
pledge, lien, lease, security interest, or other charge or encumbrance on any of
its assets, tangible or intangible; (l) any change in its accounting principles,
practices, or methods; or (m) any discharge or satisfaction by it of any lien or
encumbrance or payment by it of any obligation or liability (fixed or
contingent) other than (A) current liabilities included in its Interim Balance
Sheet, (B) current liabilities incurred since the date of its Interim Balance
Sheet in the ordinary course of business and (C) current liabilities incurred in
connection with this transaction and set forth in Section 3.7 of its Disclosure
Schedule.
 
                                       A-7
<PAGE>   130
 
     3.8. TAXES AND TAX RETURNS.
 
          (a) All material Taxes of any nature whatsoever due and payable by it
     prior to the execution hereof and all Tax Returns required to be filed
     prior to such date have been properly computed, duly and timely filed
     (taking into consideration extensions of time to file) and fully paid and
     discharged. There are no outstanding agreements or waivers extending the
     statutory period of limitations applicable to any Tax or Tax Return for any
     period. It has paid all material Taxes which have become due pursuant to
     Tax Returns and has paid all installments of estimated Taxes due. All
     material Taxes and other assessments and levies which it is required by law
     to withhold or to collect have been duly withheld and collected, and have
     been paid over to the proper governmental authorities to the extent due and
     payable. All material Taxes not yet due and payable have been properly
     accrued on the financial statements of it. Subsequent to the date hereof
     and prior to the Closing Date hereunder, all Tax Returns shall be timely
     and accurately filed, and any material Tax payable as shown thereby shall
     be paid, as required by applicable law. It has not requested nor been
     granted an extension of the time for filing any Tax Return to a date later
     than the Closing Date. There are no determined material tax deficiencies or
     proposed tax assessments (or to the best of its knowledge and belief, the
     prospects for the same) against it. It has not incurred any material
     liability for penalties, assessments or interest under any federal, state,
     local or foreign tax laws. It has withheld and paid all material Taxes
     required to have been withheld and paid by it in connection with amounts
     paid or owing to any employee, creditor, independent contractor or other
     third party.
 
          (b) There are no liens for Taxes (other than current Taxes not yet due
     and payable) on its assets. There is no audit, action, suit, or taxing
     authority proceeding now in progress, pending or threatened against it or
     with respect to any Tax of it, and no claim has ever been made by a taxing
     authority in a jurisdiction where it does not pay Tax or file Tax Returns
     that it is or may be subject to Taxes assessed by that jurisdiction.
 
          (c) It has not been a member of any affiliated group (as defined in
     Section 1504 of the Code) or filed or been included in a combined,
     consolidated, aggregate, or unitary income Tax Return. It has never been
     and is not now a party to or bound by any Tax indemnification, Tax
     allocation, or Tax sharing agreement or other contractual obligation
     pursuant to which it is or may at any time in the future be obligated to
     indemnify any other person or entity with respect to Taxes.
 
          (d) It is not a party to any agreement, contract, arrangement, or plan
     that has resulted, or could result by reason of the transactions
     contemplated hereby, separately or in the aggregate, in the payment of any
     "excess parachute payments" within the meaning of Section 280G of the Code.
 
          (e) It has provided the other party with true and complete copies of
     all Tax Returns filed with respect to it for taxable periods ending after
     December 31, 1990, and all examination reports and statements of
     deficiencies assessed against or agreed to be paid by it with respect to
     such taxable periods.
 
     3.9. NO VIOLATIONS.  Except as set forth in Section 3.9 of its Disclosure
Schedule, the execution, delivery and performance of this Agreement and the
consummation of the transactions contemplated herein will not (a) conflict with
its charter or by-laws, (b) violate any order, writ, injunction or decree
applicable to it, or (c) result in any breach or termination of, or constitute a
default under, or constitute an event which, with notice or lapse of time, or
both, would become a default under, or result in the creation of any encumbrance
upon the assets of, or create any rights of termination, cancellation, or
acceleration in any person under any agreement, arrangement, or commitment, or
violate any provision of laws, rules or regulations or any order, writ,
injunction or decree to which it is a party, or by which it or its assets or
business may be bound or affected. To the best of its knowledge and belief, no
employee or consultant of it is in violation of any term of any employment
contract, confidentiality agreement or any other contract or agreement relating
to the right of any such employee or consultant to be employed by it because of
the nature of the business conducted or to be conducted by it or for any other
reason, and the continued employment of such employees or consultants will not
result in any violations or adversely affect the performance of any duties of
such employees or consultants.
 
                                       A-8
<PAGE>   131
 
     3.10. LITIGATION.  Except as set forth in Section 3.10 of its Disclosure
Schedule, there is no legal, administrative, arbitration or other proceeding,
claim, or action of any nature or investigation pending or threatened against or
involving it, or which questions or challenges the validity of this Agreement,
any action taken or to be taken by it pursuant to this Agreement or in
connection with the transactions contemplated hereby; and it does not know or
have any reason to know of any valid basis for any such legal administrative,
arbitration or other proceeding claim, investigation or action of any nature. It
is not subject to any judgment, order or decree entered in any lawsuit or
proceeding which has had an adverse effect on its business practices or on its
ability to acquire any property or conduct its business in any area.
 
     3.11. SAFETY, ZONING AND ENVIRONMENTAL MATTERS.  Except as described in
Section 3.11 of its Disclosure Schedule:
 
          (a) It is not in material violation of any applicable statute, law, or
     regulation relating to occupational health or safety, and no charge,
     complaint, action, suit, proceeding, hearing, investigation, claim, demand,
     or notice has been filed or commenced against, or received by, it alleging
     any failure by it to comply with any such statute, law, or regulation, nor,
     to the best of its knowledge, is there any reasonable basis therefor.
 
          (b) To the best of its knowledge, none of the real properties leased
     by it, nor any leasehold improvements thereto, nor any business conducted
     by it thereon, are or have been in material violation of any applicable
     land use or zoning requirements, including without limitation any building
     line or use or occupancy restriction, any public utility or other easement,
     any limitation, condition, or covenant of record, or any zoning or building
     law, code, or ordinance.
 
          (c) To the best of its knowledge:
 
             (1) Neither it nor any operator of its Real Properties is presently
        in violation, or alleged violation, of any judgment, decree, order, law,
        permit, license, rule, or regulation pertaining to environmental
        matters, including without limitation those arising under the Resource
        Conservation and Recovery Act ("RCRA"), the Comprehensive Environmental
        Response, Compensation and Liability Act of 1980 as amended ("CERCLA"),
        the Superfund Amendments and Reauthorization Act of 1986 ("SARA"), the
        Federal Clean Water Act, the Federal Clean Air Act, the Toxic Substances
        Control Act, or any state or local statute, regulation, ordinance, order
        or decree relating to health, safety, or the environment (collectively,
        "Environmental Laws").
 
             (2) It has not received any notice or request for information (an
        "Environmental Notice") from any third party, including without
        limitation any federal, state, or local governmental authority, (i) that
        it has been identified by the United States Environmental Protection
        Agency ("EPA") as a potentially responsible party under CERCLA with
        respect to a site listed on the National Priorities List, 40 C.F.R. Part
        300 Appendix B; (ii) that any hazardous waste, as defined by 42 U.S.C.
        sec. 6903(5), any hazardous substances as defined by 42 U.S.C. sec.
        9601(14), any pollutant or contaminant as defined by 42 U.S.C. sec.
        9601(33), or any toxic substance, methane gas, oil, or hazardous
        materials or other chemicals or substances regulated by any
        Environmental Laws (collectively, "Hazardous Substances") that it has
        generated, transported, or disposed of has been found at any site at
        which a federal, state, or local agency or other third party has
        conducted or has ordered that it conduct a remedial investigation,
        removal or other response action pursuant to any Environmental Law; or
        (iii) that it is or shall be a named party to any claim, action, cause
        of action, complaint, or legal or administrative proceeding arising out
        of any third party's incurrence of costs, expenses, losses, or damages
        of any kind whatsoever in connection with the release of Hazardous
        Substances. To the best of its knowledge, no circumstances exist that
        could give rise to any Environmental Notice to it or to any complaints,
        costs, expenses, penalties, losses, or damages of the types described
        above.
 
             (3) (i) No portion of any of its Real Properties has been used for
        the handling, processing, storage, or disposal of Hazardous Substances
        except in accordance with applicable Environmental Laws; and no
        underground tank or other underground storage receptacle for Hazardous
        Substances
 
                                       A-9
<PAGE>   132
 
        is located on its Real Properties; (ii) in the course of any activities
        conducted by it and its operators at its Real Properties, no Hazardous
        Substances have been generated or are being used on such properties
        except in accordance with applicable Environmental Laws; (iii) there
        have been no unpermitted Releases or threatened Releases of Hazardous
        Substances on, upon, into, or from any of its Real Properties; (iv) to
        the best of its knowledge, there have been no Releases on, upon, from,
        or into any real property in the vicinity of any of its Real Properties
        that, through soil or groundwater contamination, may have come to be
        located on and adversely affect its Real Properties; and (v) any
        Hazardous Substances that have been generated by it or its operators at
        its Real Properties have been transported offsite only by licensed
        carriers having an identification number issued by the EPA, and have
        been treated or disposed of only by treatment or disposal facilities
        maintaining valid permits as required under applicable Environmental
        Laws, which transporters and facilities, to the best of its knowledge,
        have been and are operating in compliance with such permits and
        applicable Environmental Laws.
 
             (4) None of its Real Properties is or shall be subject to any
        applicable environmental clean-up responsibility law or environmental
        restrictive transfer law or regulation, by virtue of the transactions
        set forth herein and contemplated hereby.
 
     3.12. INTELLECTUAL PROPERTY RIGHTS.  Section 3.12 of its Disclosure
Schedule contains an accurate and complete list of all patents, patent
applications, trademarks, tradenames, service marks, logos, copyrights, and
licenses known to be used in or necessary to its business as now being conducted
(collectively, and together with any technology, know-how, trade secrets,
processes, formulas and techniques used in or necessary to its business, the
"Intellectual Property"). It owns, or is licensed or believes to otherwise have
the full unrestricted right to use, all Intellectual Property used in or
necessary to its business, and no other intellectual property rights,
privileges, licenses, contracts, or other instruments, or evidences of interests
are believed necessary to the conduct of its business as currently conducted,
with only such exceptions as have no Material Adverse Effect on its business
condition (financial or otherwise), or its prospects.
 
     In any instance where its rights to Intellectual Property arise under a
license or similar agreement, this is indicated in Section 3.12 of its
Disclosure Schedule and such rights are licensed exclusively to it, except as
indicated in Section 3.12 of its Disclosure Schedule. Except as indicated in
Section 3.12 of its Disclosure Schedule, it has no knowledge of any obligation
to compensate any other Person for the use of any Intellectual Property. Section
3.12 of its Disclosure Schedule lists every instance in which it has granted to
any other Person any license or other right to use in any manner any of the
Intellectual Property, whether or not requiring the payment of royalties (other
than commercial licenses of software entered into in the ordinary course of
business). No other Person has an interest in or right or license to use any of
its Intellectual Property. To the best of its knowledge, none of its
Intellectual Property (except patent applications) is being infringed by others,
or is subject to any outstanding order, decree, judgment, or stipulation. Except
as set forth in Section 3.12 of its Disclosure Schedule, no litigation (or other
proceedings in or before any court or other governmental, adjudicatory,
arbitral, or administrative body) relating to its Intellectual Property is
pending, or to the best of its knowledge, threatened, nor, to the best of its
knowledge, is there any basis for any such litigation or proceeding. No
litigation (or other proceedings in or before any court or other governmental,
adjudicatory, arbitral, or administrative body) charging it with infringement of
any patent, trademark, copyright, or other proprietary right is pending, or to
the best of its knowledge, threatened, nor, to the best of its knowledge, is
there any basis for any such litigation or proceeding. It maintains reasonable
security measures for the preservation of the secrecy and proprietary nature of
such of its Intellectual Property as constitutes trade secrets.
 
     3.13. CONTRACTS AND COMMITMENTS; NO DEFAULT.  Except as set forth in
Section 3.13 of its Disclosure Schedule:
 
          (a) it has no (1) employment contracts, (2) consulting agreements, or
     (3) agreements providing for severance payments or other additional rights
     or benefits (whether or not optional) in the event of the sale or other
     change in control of it;
 
                                      A-10
<PAGE>   133
 
          (b) it has no agreement for the purchase, sale, lease or license by or
     from it of assets, products, or services requiring total payments by or to
     it in excess of $100,000 in any instance or entered into other than in the
     ordinary course of the operation of its business;
 
          (c) it has not purchased or entered into a barter, currency or
     interest rate swap, collar, or hedge;
 
          (d) it has no agreement the performance of which is reasonably likely
     to result in a loss to it;
 
          (e) it has no collective bargaining or union contracts or agreements;
 
          (f) it is not restricted by agreement from carrying on its business or
     any part thereof anywhere in the world or competing in any line of business
     with any Person;
 
          (g) it has no debt obligation for borrowed money, including guarantees
     of or agreements to acquire any such debt obligation of others except as
     set forth in Section 4.18 herein and in its financial statements;
 
          (h) it has no outstanding loan to any Person (except as set forth in
     Section 4.18 herein);
 
          (i) it has no obligation or liability as guarantor, surety, co-signer,
     endorser, co-maker, indemnitor or otherwise in respect of the obligation of
     any other Person;
 
          (j) it is not subject to any obligation or requirement to provide
     funds to or make any investment (in the form of a loan, capital
     contribution or otherwise) in any Person (except as set forth in Section
     4.18 herein);
 
          (k) it is not a party to any agreement, contract, commitment or loan
     to which any of its officers or directors is a party (other than standard
     contracts relating to the performance of services or, in the case of
     directors, agreements regarding indemnification);
 
          (l) There are no outstanding sales or purchase contracts, commitments
     or proposals of it; and
 
          (m) it has not given any irrevocable power of attorney to any person,
     firm, corporation or other entity for any purpose whatsoever, except the
     appointment of agents to accept service of process.
 
     3.14. CONSENTS AND APPROVALS OF GOVERNMENT AUTHORITIES.  Except as set
forth in Section 3.14 of its Disclosure Schedule and the filing and recordation
of appropriate merger documents as required by the laws of the States of Texas
and Delaware and the filing of the Registration Statement (as hereinafter
defined) with the SEC and the SEC's declaration of the effectiveness thereof,
and the filing of the Blue Sky Filings and the action of the relevant
governmental authorities in connection therewith, no consent, approval or
authorization of, or declaration, filing or registration with, any governmental
or regulatory authority is required in connection with the execution, delivery
and performance of this Agreement by it and the consummation of the transactions
contemplated thereby.
 
     3.15. COMPLIANCE WITH LAW.  It has complied with, and is in compliance
with, (a) all laws, statutes, governmental regulations, judicial or
administrative tribunal orders, judgments, writs, injunctions, decrees, and
similar commands applicable to it and its business, (b) all unwaived terms and
provisions of all contracts, agreements, and indentures to which it is a party,
or to which it or any of its properties are subject, and (c) its charter
documents and by-laws, each as amended to date, except, in the cases of clauses
(a) and (b), for any noncompliances that singly or in the aggregate do not and
could not reasonably be expected to have a Material Adverse Effect. It has not
committed, been charged with, or, to its knowledge, been under investigation
with respect to, nor does there exist, any violation by it of any provision of
any federal, state, or local law or administrative regulation, except for any
violations that singly or in the aggregate do not and could not reasonably be
expected to have a Material Adverse Effect. It has and maintains, and Section
3.15 of its Disclosure Schedule sets forth, a complete and correct list of, all
such licenses, permits, and other authorizations from all such governmental
authorities as are necessary or desirable for the conduct of its business or in
connection with the ownership or use of its properties (including without
limitation such licenses, permits, and authorizations relating to the
environment or to the protection of public health or safety from pollution or
environmental contamination of any kind that are required in connection with the
conduct of
 
                                      A-11
<PAGE>   134
 
its business), except for any licenses, permits, and authorizations that, if not
obtained, both singly and in the aggregate do not and could not reasonably be
expected to have a Material Adverse Effect, and all of which (except as
expressly designated on Section 3.15 of its Disclosure Schedule) are in full
force and effect in all material respects, and true and complete copies of all
of which have previously been delivered to the other party hereto.
 
     3.16 TITLE TO PROPERTY; LEASES, ETC.  Except as described in Section 3.16
of its Disclosure Schedule, it has good and marketable title to all of its
properties and assets, including without limitation, all of its Intellectual
Property and all of those properties and assets reflected in its Interim Balance
Sheet (except for properties or assets sold or otherwise disposed of in the
ordinary course of business since the date of such balance sheet), all free and
clear of all liens, pledges, charges, security interests, mortgages, leases,
encumbrances, or title retention agreements of any kind or nature. It does not
own or have an option or other right to acquire any real property. It has not
received any notice that either the whole or any portion of any real property
leased by it is to be condemned, requisitioned, or otherwise taken by any public
authority. It does not have any knowledge of any public improvement that may
result in special assessments against or otherwise affecting any of the real
property leased by it. Section 3.16 of its Disclosure Schedule sets forth a
complete and correct description of all leases of real or personal property
under which it is lessor or lessee. Complete and correct copies of all such
leases and all amendments, supplements, and modifications thereto, other than
any personal property lease with an annual rent of less than $15,000 and total
remaining rental payments of less than $30,000, have been delivered to the other
party hereto. Each such lease is valid and subsisting and no event or condition
exists that constitutes, or after notice or lapse of time or both would
constitute, a default thereunder by it or, to the best of its knowledge, the
other party thereto. Its leasehold interests are subject to no lien or other
claim, charge, or encumbrance, and it is in quiet possession of the properties
covered by such leases. No provision of any real property lease or sublease to
which it is a party restricts its ability to remove at
the end of the applicable lease term any machinery and equipment and any
leasehold improvements. It has established an adequate reserve, which is
reflected in its Interim Balance Sheet, for the anticipated costs of any
property renovation and repairs to its leased premises required to be performed
or paid for by it upon termination of any of its leases of real property.
 
     3.17. INDEBTEDNESS.  Except as described in Section 3.17 of its Disclosure
Schedule, it does not have any Indebtedness outstanding at the date hereof. It
is not in default with respect to any outstanding Indebtedness or any instrument
or agreement relating thereto, and no such Indebtedness or any instrument or
agreement relating thereto purports to limit the issuance of any securities by
it or the operation of its business. Complete and correct copies of all
instruments and agreements (including all amendments, supplements, waivers, and
consents) relating to any Indebtedness of it have been furnished to the other
party hereto. As used herein "Indebtedness" means (a) all indebtedness for
borrowed money, whether current or funded, or secured or unsecured, (b) all
indebtedness for the deferred purchase price of property or services represented
by a note or security agreement, (c) all indebtedness created or arising under
any conditional sale or other title retention agreement (even though the rights
and remedies of the seller or lender under such agreement in the event of
default may be limited to repossession or sale of such property), (d) all
indebtedness secured by a purchase money mortgage or other lien to secure all or
part of the purchase price of property subject to such mortgage or lien, (e) all
obligations under leases that have been or must be, in accordance with GAAP,
recorded as capital leases in respect of which it is liable as lessee, (f) any
liability in respect of banker's acceptances or letters of credit, and (g) all
indebtedness referred to in clause (a), (b), (c), (d), (e), or (f) above that is
directly or indirectly guaranteed by it or that it has agreed (contingently or
otherwise) to purchase or otherwise acquire or in respect of which it has
otherwise assured a creditor against loss.
 
     3.18. ABSENCE OF UNDISCLOSED LIABILITIES.  Except to the extent reflected
or reserved against in its Interim Balance Sheet or incurred in the ordinary
course of business after the date of such balance sheet or incurred in
connection with the transactions contemplated by this Agreement and described in
Section 3.18 of its Disclosure Schedule or as otherwise described in its
Disclosure Schedule, it does not have any material liabilities or obligations of
any nature, whether accrued, absolute, contingent, or otherwise (including
without limitation liabilities as guarantor or otherwise with respect to
obligations of others) and whether due or to become due.
 
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<PAGE>   135
 
     3.19. INSURANCE.  Section 3.19 of its Disclosure Schedule lists the
policies of theft, fire, liability (including products liability), worker's
compensation, life, property and casualty, directors' and officers', and other
insurance owned or held by it. Such policies of insurance are maintained with
financially sound and reputable insurance companies, funds, or underwriters, are
of the kinds and cover such risks, and are in such amounts and with such
deductibles and exclusions, as are consistent with prudent business practice.
All such policies are in full force and effect, are sufficient for compliance in
all material respects by it with all requirements of law and of all agreements
to which it is a party, and provide that they will remain in full force and
effect through the respective dates set forth in Section 3.19 of its Disclosure
Schedule, and will not terminate or lapse or otherwise be affected in any way by
reason of the Merger or the other transactions contemplated hereby.
 
     3.20. BROKERS.  Except for its arrangements with its Financial Adviser, no
finder, broker, agent, or other intermediary has acted for or on behalf of it
or, to its knowledge, its stockholders, in connection with the negotiation or
consummation of the transactions contemplated hereby.
 
     3.21. DIVIDENDS.  There are no dividends declared or unpaid on any of its
capital stock as of the date hereof.
 
     3.22. COMPLAINTS.  It has received no material complaints from any of its
stockholders which have not been resolved without penalty to or sanction of it
and, to the best of its knowledge and belief, there is no such complaint pending
or threatened and no basis therefor.
 
     3.23. AGREEMENTS TO VOTE IN FAVOR OF THE MERGER.  In the case of ACCESS
only, binding written agreements to vote in favor of approving this Agreement
and the Merger from stockholders of ACCESS holding at least 66 2/3% of the
outstanding shares of ACCESS Stock have been delivered to CHEMEX.
 
     3.24. FULL DISCLOSURE.  To the best of its knowledge and belief, (i) it has
provided the other party hereto with full and complete disclosure and access
concerning all material aspects of and information with respect to it, (ii) all
written information which has been communicated by it to the other party hereto
with respect to the assets, liabilities, business, operations, financial
condition and business prospects of it is true, correct and complete, (iii)
there exist no facts other than those set forth herein, including its Disclosure
Schedule and other documents referred to herein, or which have not otherwise
been disclosed to the other party hereto in writing, which would make any
material facts set forth herein or otherwise disclosed to the other party hereto
misleading, incomplete or incorrect, and (iv) there are no other representations
or warranties which have not been made in writing and which are required in
order to inform the other party hereto materially concerning the business,
operations, financial condition and business prospects of it.
 
                                   ARTICLE 4
 
                CONDUCT OF BUSINESS PRIOR TO THE EFFECTIVE TIME
 
     Each of ACCESS and CHEMEX hereby covenants and agrees as follows, from and
after the date of this Agreement and until the Effective Time, except as
otherwise specifically agreed to in writing by the other party:
 
     4.1. FULL ACCESS.  It shall provide the other party and its authorized
representatives full access during normal business hours to all of its
properties, books, records, contracts, and documents, including without
limitation the opportunity to ask questions of its officers, employees,
accountants and counsel, and furnish to the other party and its authorized
representatives all information with respect to its business and financial
affairs that the other party may reasonably request.
 
     4.2. CARRY ON IN REGULAR COURSE.  It shall maintain its owned and leased
properties in good operating condition and repair, reasonable wear and tear
excepted. It shall carry on its business in the usual and ordinary course and
not make or institute any unusual method of purchase, sale, lease, management,
accounting or operation. It shall preserve all of its accounting and business
records, corporate records and Intellectual Property for the benefit of the
Surviving Corporation.
 
                                      A-13
<PAGE>   136
 
     4.3. NO GENERAL INCREASE.  It shall not grant any increases in the rates of
pay to its employees, consultants or officers nor by means of any bonus,
insurance, pension or stock option or other benefit plan or other contract or
commitment increase in any amount the benefits or compensation of any such
person.
 
     4.4. SEVERANCE.  It shall not obligate itself to pay severance compensation
to any officer or employee.
 
     4.5. CONTRACTS AND COMMITMENTS.  It shall not enter into any contract or
commitment or engage in any transaction (a) which is not in the usual and
ordinary course of its business, or (b) which involves the acquisition or
disposition of a material asset or any material technology license.
 
     4.6. SALES OF CAPITAL ASSETS.  It shall not sell, lease or dispose of any
capital assets.
 
     4.7. CAPITAL EXPENDITURES.  It shall not make any material capital
expenditures or capital additions or enter into any leases of capital equipment.
 
     4.8. BORROWING AND LIENS.  It shall not create or incur any indebtedness
for borrowed money, mortgage, lien, charge or encumbrance of any kind except as
provided for in Section 4.18 hereof or guarantee or otherwise incur any
liability with respect to the obligations of any Person.
 
     4.9. DIVIDENDS AND DISTRIBUTIONS.  It shall not (a) declare or pay any
dividends (whether in cash, shares of stock, or otherwise) on, or make any other
distribution in respect of, any shares of its capital stock, (b) sell, issue,
purchase, redeem, or acquire for value any shares of its capital stock, or any
securities convertible into or exchangeable for, or options, warrants, or other
rights to acquire, shares of its capital stock, other than the issuance of
shares upon the exercise, conversion, or exchange in accordance with their
respective terms of such convertible securities, options, warrants, and rights
as are outstanding as of the date hereof, or (c) agree to do any of the
foregoing.
 
     4.10. NO DEFAULT.  It shall not do any act or omit to do any act, or permit
any act or omission to act, which would cause a breach of any material contract,
commitment or obligation which would materially and adversely affect its
business or financial condition.
 
     4.11. PRESS RELEASE.  It shall provide the other party and its authorized
representatives with copies of (i) in the case of CHEMEX only, the SEC filings
required to be filed by CHEMEX at least twenty-four hours prior to sending such
filings to the SEC, and (ii) all press releases or reports to stockholders in
advance of the issuance or distribution of such press releases or reports,
provided that no press release or report concerning the Merger or related
matters shall be issued or distributed by it without the prior consent of the
other party, such consent not to be unreasonably withheld.
 
     4.12. NO INVESTMENTS.  It will not establish any new Subsidiary or make or
commit to make any investment in any Subsidiary or other Person.
 
     4.13. PRESERVATION OF ORGANIZATION.  It shall use its best efforts to
preserve its business organization intact, to keep available to the Surviving
Corporation its present key officers and employees, and to preserve for the
Surviving Corporation its present relationships with suppliers and customers and
others having business relations with it. Except as contemplated by this
Agreement, it shall not amend its certificate of incorporation or other charter
documents or by-laws. It shall not (i) merge or consolidate with any other
Person, (ii) acquire any stock of any Person, (iii) acquire any capital asset
with a market value in excess of $20,000, or capital assets of market value
aggregating in excess of $50,000, or (iv) acquire any asset other than in the
ordinary course of business, whether by purchase, lease, license, or otherwise.
 
     4.14. COMPLIANCE WITH LAWS.  It shall duly comply in all material respects
with all applicable laws, regulations, and orders.
 
     4.15. ADVICE OF CHANGE.  It shall promptly advise the other party in
writing of any development or change in circumstances (including any litigation
to which it may become a party or of which it may gain knowledge) that does or
could reasonably be expected to (i) call into question the validity of this
Agreement or any action taken or to be taken pursuant hereto, (ii) adversely
affect the ability of the parties to consummate the transactions contemplated
hereby, or (iii) have a Material Adverse Effect with respect to it.
 
                                      A-14
<PAGE>   137
 
     4.16. CONSENTS OF THIRD PARTIES.  It shall employ its best efforts to
secure, before the Closing Date, the consent, in form and substance satisfactory
to the other party and its counsel, to the consummation of the transactions
contemplated by this Agreement by each party to any of its contracts,
commitments, or obligations under which such transactions would constitute a
default, or would accelerate, modify, or vest any rights or obligations of it or
any other party thereto, or would permit cancellation or termination by any
other party of any such contract, commitment, or obligation.
 
     4.17. TRANSACTIONS WITH AFFILIATES.  It shall not enter into any
transaction with any Affiliate other than (a) transactions involving only the
elimination of rights, claims, or other benefits of such Affiliate, with no
adverse consequence to it, and (b) the payment of compensation and reimbursement
of expenses in accordance with existing employment arrangements and usual past
practices.
 
     4.18. LOANS FROM CHEMEX TO ACCESS.  CHEMEX shall, at the request of ACCESS
at any time on or prior to the Drop Dead Date, make interest-bearing loans to
ACCESS in an aggregate principal amount not to exceed $250,000 upon the terms
and conditions set forth in, and as shall be evidenced by, a Convertible
Promissory Note substantially in the form of Exhibit E attached hereto.
 
                                   ARTICLE 5
 
                        REGISTRATION AND PROXY STATEMENT
 
     As promptly as practicable CHEMEX shall prepare and file with the SEC, and
utilize its best efforts to cause to become effective, a registration statement
and proxy statement on Form S-4 (the "Registration Statement") under the
Securities Act with respect to the registration of the CHEMEX stock to be issued
to the ACCESS stockholders and the meeting of the stockholders of CHEMEX to be
held to consider the Board of Directors recommendation to approve the Merger.
ACCESS and CHEMEX shall furnish to one another all information required for the
Registration Statement and each shall indemnify the other and their respective
officers, directors and agents with respect to any cost or liability incurred as
a result of any untrue statement of a material fact or omission to state a
material fact in such information which is required to be included therein or
necessary to make such information not misleading. CHEMEX represents and
warrants that the Registration Statement shall comply in all material respects
with the requirements of the Securities Act and shall not contain any untrue
statement of material fact or omit to state a material fact required to be
stated therein or necessary to make the statement therein, in light of
circumstances under which they were made, not misleading, except with respect to
information furnished by ACCESS. CHEMEX shall file the Blue Sky Filings with
regard to the shares of CHEMEX Stock to be issued to ACCESS stockholders, under
the "blue sky" laws of each state and other jurisdiction in which such
stockholders reside.
 
                                   ARTICLE 6
 
                   CONDITIONS PRECEDENT TO CHEMEX OBLIGATIONS
 
     Each and every obligation of CHEMEX to be performed under this Agreement
shall be subject to the satisfaction of the following conditions prior to or at
the Closing hereunder:
 
     6.1. REPRESENTATIONS AND WARRANTIES TRUE AT CLOSING DATE.  The
representations and warranties made by ACCESS shall be true on and as of Closing
hereunder as if made on that date, and ACCESS shall have delivered to CHEMEX a
certificate of its President so stating.
 
     6.2. RESOLUTIONS.  ACCESS shall have delivered to CHEMEX a certified copy
of the resolutions of its Board of Directors authorizing or ratifying the
execution and performance of this Agreement and approving the Merger.
 
     6.3. SHAREHOLDER APPROVAL.  The stockholders of ACCESS shall have approved
the Merger as required by the Texas Business Corporation Act, ACCESS's
certificate of incorporation, by-laws, and any other instruments or agreements
to which it is a party or is subject and bearing on such matters.
 
                                      A-15
<PAGE>   138
 
     6.4. COMPLIANCE WITH AGREEMENT.  ACCESS shall have performed and complied
with all of the obligations under this Agreement which are to be performed or
complied with by it prior to or at Closing and shall have delivered to CHEMEX a
certificate of its President so stating.
 
     6.5. OPINION OF COUNSEL FOR ACCESS.  CHEMEX shall have received at Closing
an opinion of Ralph L. Poucher Esq., counsel for ACCESS, dated the Closing Date,
in form and substance reasonably satisfactory to CHEMEX and substantially in the
form of Exhibit C-1 attached hereto.
 
     6.6. NO LITIGATION.  No suit, action or other proceeding shall be pending
or threatened before any court or governmental agency in which it is sought to
restrain, prohibit or to obtain damages or other relief in connection with this
Agreement or the consummation of the transactions contemplated hereby.
 
     6.7. CERTIFICATE OF GOOD STANDING.  ACCESS shall have delivered to CHEMEX a
certificate dated not more than ten days prior to the Closing date issued by the
Secretary of State of the State of Texas evidencing the good standing of ACCESS
in such jurisdiction.
 
     6.8. GOVERNMENTAL CONSENTS, ETC.  All necessary consents, approvals, and
orders shall have been obtained from such regulators and other governmental
entities as are necessary in order to permit the Merger to take place as
contemplated and the business of the Surviving Corporation to be continued
substantially as currently conducted.
 
     6.9. REGISTRATION STATEMENT.  The Registration Statement shall have been
filed with and declared effective by the SEC and as of the Closing Date shall
remain effective and shall not be subject to any stop order.
 
     6.10. BLUE SKY FILINGS.  As of the Closing Date, all of the Blue Sky
Filings shall have been made and shall be in effect and not subject to any
suspension, revocation, or stop order, and all such consents and approvals shall
have been obtained and shall be effective and not subject to any suspension,
revocation, or stop order, as may be required in order for the issuance of
CHEMEX Common Stock in the Merger to be in full compliance with all applicable
state securities laws and regulations and such issuance shall be legally
permitted by all such laws and regulations.
 
     6.11. DISSENTING SHARES.  Holders of at least 90% of the issued and
outstanding shares of ACCESS Stock shall have voted in favor of or consented to
the Merger or shall have otherwise waived or failed to perfect any appraisal
rights to which they may otherwise be entitled under the Texas Business
Corporation Act, and the President and Secretary of ACCESS shall have delivered
to CHEMEX a certificate dated as of the Closing Date to the foregoing effect.
 
     6.12. DELIVERY OF CERTIFICATES OF MERGER.  ACCESS shall have duly executed
and delivered the Delaware Certificate of Merger and the Texas Articles of
Merger.
 
     6.13. NO MATERIAL CHANGE.  Since the date of this Agreement there shall not
have been any material damage to or loss or destruction of any of the properties
or assets owned or leased by ACCESS (whether or not covered by insurance) or any
Material Adverse Effect with respect to ACCESS, or the imposition of any laws,
rules, or regulations that could reasonably be expected to have a Material
Adverse Effect with respect to ACCESS.
 
     6.14. FAIRNESS OPINION.  On or before the date the Registration Statement
is declared effective by the SEC, CHEMEX shall have received a written opinion
from its Financial Adviser substantially to the effect that the terms of the
Merger are fair to its stockholders, from a financial point of view; and on or
as of the Closing Date, it shall have received from its Financial Adviser
written confirmation of such opinion dated as of the Closing Date.
 
     6.15. NO PAYMENTS OR SEVERANCE BENEFITS TO EMPLOYEES.  The transactions
contemplated hereby shall not have triggered, and shall have no remaining
potential to trigger, any contractual obligation on the part of the other party
to make any compensation or other payments to its officers or employees; and the
other party shall have no contractual obligation to provide any severance
benefits to any of its employees in connection with any termination of their
employment.
 
                                      A-16
<PAGE>   139
 
     6.16. PROCEEDINGS AND DOCUMENTS SATISFACTORY.  All proceedings in
connection with the Merger and the other transactions contemplated by this
Agreement and all certificates and documents delivered to it by or on behalf of
the other party pursuant to this Agreement shall be reasonably satisfactory to
it and its counsel.
 
     6.17. INCOME TAX MATTERS.  CHEMEX shall have received the opinion of its
tax counsel, Bingham, Dana & Gould, dated the Closing Date, in form reasonably
satisfactory to it and substantially in the form of Exhibit C-3 attached hereto.
 
     6.18. TAX MATTERS CERTIFICATE.  CHEMEX shall have received from ACCESS an
executed original of a certificate substantially in the form attached as an
exhibit to the tax matters opinion of its tax counsel referred to in Section
6.17 hereof.
 
     6.19. STOCKHOLDERS AGREEMENT.  Dr. David F. Ranney, the principal
shareholder of ACCESS, shall have executed and delivered to CHEMEX a
Stockholders Agreement substantially in the form of Exhibit D attached hereto.
 
     6.20. FINANCIAL STATEMENTS.  ACCESS shall have delivered to CHEMEX copies
of its audited balance sheet as of December 31, 1994 and the related statements
of income, changes in stockholders' equity and cash flows for the year ended on
such date, accompanied by an audit report thereon of Smith, Anglin & Co., which
balance sheet and financial statements shall be reasonably satisfactory to
CHEMEX.
 
                                   ARTICLE 7
 
                   CONDITIONS PRECEDENT TO ACCESS OBLIGATIONS
 
     Each and every obligation of ACCESS to be performed under this Agreement
shall be subject to the satisfaction of the following conditions prior to or at
the Closing hereunder:
 
     7.1. REPRESENTATIONS AND WARRANTIES TRUE AT CLOSING DATE.  The
representations and warranties made by CHEMEX shall be true on and as of Closing
hereunder as if made on that date, and CHEMEX shall have delivered to ACCESS a
certificate of its President or a Vice-President so stating.
 
     7.2  AUTHORIZED STOCK.  CHEMEX shall have taken all necessary actions and
completed all appropriate filings, including without limitation the filing of
the Charter Amendment with the Secretary of State of the State of Delaware, to
increase its authorized common stock to 40,000,000 shares and it authorized
preferred stock to 10,000,000 shares.
 
     7.3. RESOLUTIONS.  CHEMEX shall have delivered to ACCESS a certified copy
of the resolutions of its Board of Directors authorizing or ratifying the
execution and performance of this Agreement and approving the Merger.
 
     7.4. SHAREHOLDER APPROVAL.  The stockholders of CHEMEX shall have approved
the Merger as required by the Delaware General Corporation Law, CHEMEX's
certificate of incorporation, By-laws, and any other instruments or agreements
to which it is a party or is subject and bearing on such matters.
 
     7.5. COMPLIANCE WITH AGREEMENT.  CHEMEX shall have performed and complied
with all of the obligations under this Agreement which are to be performed or
complied with by it prior to or at Closing and shall have delivered to ACCESS a
certificate of its President or a Vice-President so stating.
 
     7.6. OPINION OF COUNSEL FOR CHEMEX.  ACCESS shall have received at Closing
an opinion of Bingham, Dana & Gould, counsel for CHEMEX, dated the Closing Date,
in form and substance reasonably satisfactory to ACCESS and substantially in the
form of Exhibit C-2 attached hereto.
 
     7.7. NO LITIGATION.  No suit, action or other proceeding shall be pending
or threatened before any court or governmental agency in which it is sought to
restrain, prohibit or to obtain damages or other relief in connection with this
Agreement or the consummation of the transactions contemplated hereby.
 
                                      A-17
<PAGE>   140
 
     7.8. CERTIFICATE OF GOOD STANDING.  CHEMEX shall have delivered to ACCESS a
certificate dated not more than ten days prior to the Closing Date issued by the
Secretary of State of the State of Delaware evidencing the good standing of
CHEMEX in such jurisdiction.
 
     7.9. GOVERNMENTAL CONSENTS, ETC.  All necessary consents, approvals, and
orders shall have been obtained from such regulators and other governmental
entities as are necessary in order to permit the Merger to take place as
contemplated and the business of the Surviving Corporation to be continued
substantially as currently conducted.
 
     7.10. REGISTRATION STATEMENT.  The Registration Statement shall have been
filed with and declared effective by the SEC and, as of the Closing Date, shall
remain effective and shall not be subject to any stop order.
 
     7.11. BLUE SKY FILINGS.  As of the Closing Date, all of the Blue Sky
Filings shall have been made and shall be in effect and not subject to any
suspension, revocation, or stop order, and all such consents and approvals shall
have been obtained and shall be effective and not subject to any suspension,
revocation, or stop order, as may be required in order for the issuance of
CHEMEX Common Stock in the Merger to be in full compliance with all applicable
state securities laws and regulations and such issuance shall be legally
permitted by all such laws and regulations.
 
     7.12. DELIVERY OF CERTIFICATES OF MERGER.  CHEMEX shall have duly executed
and delivered the Delaware Certificate of Merger and the Texas Articles of
Merger.
 
     7.13. NO MATERIAL CHANGE.  Since the date of this Agreement there shall not
have been any material damage to or loss or destruction of any of the properties
or assets owned or leased by CHEMEX (whether or not covered by insurance) or any
Material Adverse Effect with respect to CHEMEX, or the imposition of any laws,
rules, or regulations that could reasonably be expected to have a Material
Adverse Effect with respect to CHEMEX.
 
     7.14. NO PAYMENTS OR SEVERANCE BENEFITS TO EMPLOYEES.  The transactions
contemplated hereby shall not have triggered, and shall have no remaining
potential to trigger, any contractual obligation on the part of CHEMEX to make
any compensation or other payments to its officers or employees; and CHEMEX
shall have no contractual obligation to provide any severance benefits to any of
its employees in connection with any termination of their employment.
 
     7.15. PROCEEDINGS AND DOCUMENTS SATISFACTORY.  All proceedings in
connection with the Merger and the other transactions contemplated by this
Agreement and all certificates and documents delivered to it by or on behalf of
the other party pursuant to this Agreement shall be reasonably satisfactory to
it and its counsel.
 
     7.16. OPINION OF TAX COUNSEL.  ACCESS shall have received an opinion of its
tax counsel, Robert McGuinness, Esq., dated the Closing Date, in form reasonably
satisfactory to it and substantially in the form attached as Exhibit C-4 hereto.
 
     7.17. TAX MATTERS CERTIFICATE.  ACCESS shall have received from CHEMEX an
executed original of a certificate substantially in the form attached as an
exhibit to the tax matters opinion of its tax counsel referred to in Section
7.16 hereof.
 
     7.18. DISSENTING SHARES.  Holders of at least 90% of the issued and
outstanding shares of ACCESS Stock shall have voted in favor of or consented to
the Merger or shall have otherwise waived or failed to perfect any appraisal
rights to which they may otherwise be entitled under Texas Business Corporation
Act.
 
     7.19. TOTAL CASH ASSETS OF CHEMEX.  At the Effective Time CHEMEX shall have
cash and cash equivalents of at least One Million Six Hundred Thousand Dollars
($1,600,000) minus (i) any and all prepaid premium payments made in the ordinary
course of business for continuing insurance coverage, and (ii) the then
outstanding principal amounts of any loans from CHEMEX to ACCESS.
 
                                      A-18
<PAGE>   141
 
                                   ARTICLE 8
 
                       COVENANTS OF SURVIVING CORPORATION
 
     8.1. BOARD OF DIRECTORS.  The directors of the Surviving Corporation on the
Closing shall be as set forth on the Delaware Certificate of Merger as filed
with the Secretary of State of Delaware who shall be Herbert H. McDade, Jr., two
additional members to be appointed by CHEMEX, Dr. David F. Ranney, Kerry P.
Gray, and one additional member appointed by ACCESS and one member to be jointly
appointed by ACCESS and CHEMEX for a total of seven members. Each of such
directors shall hold office after the Closing until his or her successor is duly
elected or appointed and qualified in the manner provided in the Certificate and
Bylaws of the Surviving Corporation, or as otherwise provided by law. All
directors of the Surviving Corporation shall be entitled to indemnification
agreements with the Surviving Corporation in a form substantially the same as
the indemnification agreements between CHEMEX and its directors in effect at the
Effective Time. The Chairman of the Board of the Surviving Corporation on the
Closing shall be Herbert H. McDade, Jr. The current directors of CHEMEX shall
take all such actions as may be necessary to effect the provisions of this
Section 8.1.
 
     8.2. OFFICERS.  The officers of the Surviving Corporation on the Closing
shall be as follows:
 
<TABLE>
            <S>                                           <C>
            Kerry P. Gray                                 President and CEO.
            Dr. David F. Ranney                           Executive Vice President
            Herbert H. McDade, Jr.                        Secretary
            Stephen B. Thompson                           Assistant Secretary
            Justin P. Morreale                            Assistant Secretary
</TABLE>
 
     Such officers shall hold office after the Closing for the terms to which
they were elected, subject to the provisions set forth in the Bylaws of the
Surviving Corporation. The directors of CHEMEX shall take all such actions as
may be necessary to effect the provisions of this Section 8.2.
 
     8.3. ISSUANCE OF WARRANTS.  Upon the achievement of the provisions outlined
below the Surviving Corporation will issue up to 750,000 warrants, each
exercisable for the purchase of one share of CHEMEX Common Stock with a 5 year
expiration from the date of issue at an exercise price of $0.75 per share.
Warrants issuable under this provision will be issued on a pro rata basis to
stockholders of record of ACCESS Stock at the Effective Time. The provisions for
the issuance of such warrants are as follows:
 
          a) 350,000 warrants will be issuable upon the Surviving Corporation
     signing a binding MRI contrast agent development agreement which provides
     for guaranteed minimum payments of $3,000,000 during the initial 2 year
     period of the Agreement; or
 
          b) 400,000 warrants will be issuable upon the Surviving Corporation
     signing a binding small molecule oncology development agreement which
     provides for guaranteed minimum payments of $4,000,000 during the initial 2
     year period of the Agreement.
 
          c) To qualify for the issuance of warrants under this Section 8.3
     either of such development agreements must be signed within 12 months of
     the Closing.
 
                                   ARTICLE 9
 
                 NO SURVIVAL OF REPRESENTATIONS AND WARRANTIES
 
     The respective representations, warranties, obligations, agreements, and
promises of the parties contained in this Agreement and in any schedule,
certificate, or letter delivered pursuant to this Agreement, other than those
that by their terms apply to the Surviving Corporation after the Effective Time
of the Merger, shall terminate as of, and shall not survive, the Effective Time
of the Merger.
 
                                      A-19
<PAGE>   142
 
                                   ARTICLE 10
 
                        TAX CONSEQUENCES TO THE PARTIES
 
     The parties understand and agree that neither of them is making any
representation or warranty as to the tax consequences of this Agreement, the
Merger, or the events and actions contemplated hereby. Nonetheless, the parties
intend the transactions contemplated hereby to constitute a tax-free
reorganization under sec. 368(a) of the Code, and agree to report these
transactions as such on their respective tax returns.
 
                                   ARTICLE 11
 
                                 BREAK UP FEES
 
     11.1. ACCESS FEE.  In consideration for the efforts to be made by ACCESS
for the accomplishment of the Merger and to induce it to carry out this
Agreement, if on or before the Drop Dead Date there is announced the acquisition
or merger of CHEMEX by or with any other entity or the execution and delivery by
CHEMEX, without the consent of ACCESS, of any legally binding agreement relating
to such a merger or acquisition, there shall be paid to ACCESS in immediately
negotiable good federal funds within 30 days of the announcement of such other
transaction a fee of $600,000. Such fee shall not be payable in the event of any
uncured breach by ACCESS of its obligations under this Agreement.
 
     11.2. CHEMEX FEE.  In consideration for the efforts to be made by CHEMEX
for the accomplishment of the Merger and to induce it to carry out this
Agreement, if on or before the Drop Dead Date there is announced the acquisition
or merger of ACCESS by or with any other entity or the entering into, without
the prior written consent of CHEMEX of any other arrangement for the financing
of the technology development of ACCESS or the execution and delivery by ACCESS,
without the consent of CHEMEX of any legally binding agreement relating to such
a merger or acquisition or for the financing of the technology development of
ACCESS there shall be paid to CHEMEX in immediately negotiable good federal
funds upon the consummation of such other transaction a fee of $600,000. Such
fee shall not be payable in the event of any uncured breach by CHEMEX of its
obligations under this Agreement.
 
                                   ARTICLE 12
 
                                    EXPENSES
 
     Except as specifically provided in this Agreement, each of the parties
hereto shall bear all of its expenses incurred in connection with the
negotiation and preparation of this Agreement and the transactions contemplated
hereby. All amounts, if any, payable to the Financial Adviser of either party in
connection with this Agreement and the transactions contemplated hereby shall be
the responsibility of such party if the Merger is not consummated; but all such
amounts, if any, shall be the responsibility of the Surviving Corporation if the
Merger is consummated.
 
                                   ARTICLE 13
 
                                CONFIDENTIALITY
 
     Any and all non-public information disclosed by or on behalf of either
party to the other party or its representatives in connection with the
negotiations and/or due diligence investigations leading to the execution of
this Agreement, or in furtherance hereof, shall remain subject to the terms of
the Confidentiality Agreements by and between the parties dated as of July 11,
1995 (the "Confidentiality Agreement").
 
                                      A-20
<PAGE>   143
 
                                   ARTICLE 14
 
                          TERMINATION AND ABANDONMENT
 
     14.1. TERMINATION.  This Agreement may be terminated at any time prior to
the Effective Time, whether before or after approval by the stockholders of
either party:
 
          a) by mutual consent of the Board of Directors of ACCESS and the Board
     of Directors of CHEMEX.
 
          b) by either party upon written notice to the other, if all of the
     conditions precedent to the Closing set forth in Articles 6 and 7 of this
     Agreement have not been satisfied or waived on or before the Drop Dead
     Date.
 
          c) By ACCESS if there has been a material breach of any covenant or
     agreement on the part of CHEMEX set forth in this Agreement which remains
     uncured for a period of 30 calendar days; and by CHEMEX, if there has been
     a material breach of any covenant or agreement on the part of ACCESS set
     forth in this Agreement which remains uncured for a period of 30 calendar
     days.
 
          d) By either party if (i) any temporary restraining order, preliminary
     or permanent injunction, or other order issued by any court of competent
     jurisdiction, or other legal restraint or prohibition preventing the
     consummation of the Merger, shall at any time be in effect for a period of
     more than ten consecutive business days, or shall be in effect as of the
     Drop Dead Date, or (ii) any petition or request for any such injunction or
     other order shall be pending on or after the Drop Dead Date.
 
     14.2. PROCEDURE AND EFFECT OF TERMINATION.  Except for the provisions of
Article 11 ("Break Up Fees") herein, if the Agreement is terminated as provided
herein no party hereto shall have any liability or further obligation to any
other party to this Agreement unless such termination is the result of a
material breach of this Agreement by a party to this Agreement, including
without limitation any material inaccuracy of any representation or warranty
contained herein. The Confidentiality Agreement and the provisions of Article 12
("Expenses") and Section 15.10 ("Public Statements or Releases") hereof shall
survive any termination of this Agreement.
 
                                   ARTICLE 15
 
                                 MISCELLANEOUS
 
     15.1. ASSIGNMENTS.  This Agreement and all of the provisions hereof shall
be binding upon and inure to the benefit of the parties hereto and their
respective successors and permitted assigns, but neither this agreement nor any
of the rights, interests or obligations hereunder shall be assigned by any of
the parties hereto without the prior written consent of the other party.
 
     15.2. NOTICES.  All notices, requests and demands or other communications
hereunder shall be in writing and shall be deemed to have been duly given if
delivered by hand, courier, facsimile or certified or registered mail with
postage prepaid:
 
         I) If to ACCESS, to:
            Kerry P. Gray
            President and CEO
            2600 N. Stemmons Frwy.
            Suite 210
            Dallas, TX 75207
            FAX: 214/905-5101
 
                                      A-21
<PAGE>   144
 
            with a copy to:
            Ralph Poucher, Esq.
            7600 E. Orchard Road
            Suite 230 South
            Englewood, CO 80111
 
        II) If to CHEMEX, to:
            Herbert H. McDade, Jr.
            Fort Lee Executive Park One
            One Executive Drive
            Fort Lee, NJ 07024
            FAX: 201/944-9474
 
            with a copy to:
            Justin P. Morreale, Esq.
            Bingham, Dana & Gould
            150 Federal Street
            Boston, MA 02110
 
or to such other person or address as either party may furnish to the other
party in writing.
 
     15.3. GOVERNING LAW.  This Agreement and the legal relations among the
parties hereto shall be governed by and interpreted and construed in accordance
with laws of the State of Delaware (without reference to principles of conflicts
or choice of law that would cause the application of the internal laws of any
other jurisdiction).
 
     15.4. COUNTERPARTS.  This Agreement may be executed simultaneously in two
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.
 
     15.5. HEADINGS.  The headings of the Sections and Articles of this
Agreement are inserted for convenience only and shall not constitute a part
hereof.
 
     15.6. ENTIRE AGREEMENT.  This Agreement, including the Disclosure Schedules
and other documents referred to herein which form a part hereof, embodies the
entire agreement and understanding of the parties hereto in respect of the
subject matter contained herein. There are no restrictions, promises,
warranties, covenants or undertakings, other than those expressly set forth or
referred to herein. This Agreement supersedes all prior agreements and
understandings between the parties with respect to such subject matter.
 
     15.7. REPRESENTATIONS AND WARRANTIES.  The respective representations and
warranties of each party hereto contained herein shall not be deemed waived or
otherwise affected by an investigation made by the other party hereto.
 
     15.8. WAIVER OF COMPLIANCE.  Any failure of ACCESS, on the one hand, or
CHEMEX, on the other, to comply with any obligation, agreement or condition
herein may be expressly waived in writing by ACCESS or CHEMEX, respectively, but
such waiver or failure to insist upon strict compliance with such obligation,
covenant, agreement or condition shall not operate as a waiver of, or estoppel
with respect to, any subsequent or other failure.
 
     15.9. PUBLIC STATEMENTS OR RELEASES.  Neither party to this Agreement shall
(a) make, issue, or release any announcement, whether to the public generally,
or to employees, suppliers, or customers, with respect to this Agreement or the
transactions provided for herein, or (b) prior to the filing of the Registration
Statement, make any statement or acknowledgment of the existence of, or reveal
the status of, this Agreement or the transactions provided for herein, without
the prior consent of the other party, provided, that nothing contained in this
Section 15.10 shall prevent either party from making such public announcements
as such party may consider necessary in order to satisfy such party's legal or
contractual obligations, but to the extent not inconsistent with such legal and
contractual obligations, each party shall provide the other party with an
opportunity to review and comment on any proposed public announcement before it
is made.
 
                                      A-22
<PAGE>   145
 
                                   ARTICLE 16
 
                              CERTAIN DEFINITIONS
 
     As used herein the following terms not otherwise defined have the following
respective meanings:
 
     "Affiliate" means, with respect to any Person, any other Person directly or
indirectly controlling, controlled by, or under common control with such Person.
 
     "Affiliated Group" means, with respect to any Person, any affiliated group
(as defined in Section 1504 of the Code) of which such Person or any Subsidiary
of such person is or ever has been a member (or any analogous combined,
consolidated, aggregate, or unitary group defined under state, local, or foreign
income Tax law).
 
     "Affiliated Tax" means, with respect to any Person, any Tax of any
Affiliated Group for which it or any Subsidiary of it is or may be liable,
whether jointly or severally or otherwise.
 
     "Blue Sky Filings" means all filings with the appropriate state securities
administrators of the Registration Statement and/or such other documents as may
be required under applicable blue sky laws to register or qualify the CHEMEX
Common Stock to be offered and sold to ACCESS stockholders pursuant to the
Merger in such states as are necessary to consummate the Merger.
 
     "Drop Dead Date" means February 28, 1996.
 
     "Financial Adviser," means, with regard to CHEMEX, Advisory Capital
Partners.
 
     "GAAP" means generally accepted accounting principles that are (a)
consistent with the principles promulgated or adopted by the Financial
Accounting Standards Board and its predecessors, (b) applied on a basis
consistent with prior periods, and (c) such that, insofar as the use of
accounting principles is pertinent, a certified public accountant would be in a
position to deliver an unmodified opinion as to financial statements in which
such principles have been properly applied.
 
     "Material Adverse Effect" means, with respect to either party, a material
adverse effect on the condition (financial or otherwise), operations, business,
assets, or its prospects, or on its ability to consummate the transactions
contemplated hereby.
 
     "Minimum Cash Assets" means $2,000,000 in cash and cash equivalents minus
(i) the transaction costs associated with this Agreement and the transactions
contemplated herein including but not limited to the Merger, the preparation and
filing of the Registration Statement and the Blue Sky Filings, which amount
shall not exceed $100,000, (ii) any and all prepaid premium payments made in the
ordinary course of business for continuing insurance coverage, and (iii) the
outstanding principal amounts of any loans from CHEMEX to ACCESS.
 
     "Person" means a corporation, an association, a partnership, an
organization, a business, an individual, a government or political subdivision
thereof, or a governmental agency.
 
     "Release" has the meaning specified in the Comprehensive Environmental
Response, Compensation and Liability Act of 1980, 42 U.S.C. sec.sec. 9601 et
seq.
 
     "SEC" means the United States Securities and Exchange Commission or other
federal agency administering the Securities Act as of the relevant time of
reference.
 
     "Subsidiary" means, with respect to any Person, any corporation a majority
(by number of votes) of the outstanding shares of any class or classes of which
shall at the time be owned by such Person or by a Subsidiary of such Person, if
the holders of the shares of such class or classes (a) are ordinarily, in the
absence of contingencies, entitled to vote for the election of a majority of the
directors (or persons performing similar functions) of the issuer thereof, even
though the right so to vote has been suspended by the happening of such a
contingency, or (b) are at the time entitled, as such holders, to vote for the
election of a majority of the directors (or persons performing similar
functions) of the issuer thereof, whether or not the right so to vote exists by
reason of the happening of a contingency.
 
                                      A-23
<PAGE>   146
 
     "Tax" or "Taxes" means any federal, state, local, or foreign income, gross
receipts, franchise, estimated, alternative minimum, add-on minimum, sales, use,
transfer, registration, value added, excise, natural resources, severance,
stamp, occupation, premium, windfall profit, environmental, customs, duties,
real property, personal property, capital stock, intangibles, social security,
unemployment, disability, payroll, license, employee, or other tax or levy, of
any kind whatsoever, including any interest, penalties, or additions to tax in
respect of the foregoing.
 
     "Tax Return" means any return, declaration, report, claim for refund,
information return, or other document (including any related or supporting
estimates, elections, schedules, statements, or information) filed or required
to be filed in connection with the determination, assessment, or collection of
any Tax or the administration of any laws, regulations, or administrative
requirements relating to any Tax.
 
     "Total Cash Assets" means the total amount of cash and cash equivalents of
CHEMEX.
 
     IN WITNESS WHEREOF, the parties hereto have caused this Amended and
Restated Agreement to be duly executed by their authorized representatives as of
the day and year first above written.
 
<TABLE>
<S>                                           <C>
ATTEST                                        Chemex Pharmaceuticals, Inc.

                                              by: /s/  HERBERT H. MCDADE, JR.
- ------------------------------------             ---------------------------------
                                                 Herbert H. McDade, Jr., President
[seal]
ATTEST                                        ACCESS Pharmaceuticals, Inc.

                                              by: /s/  KERRY P. GRAY
- ------------------------------------             ---------------------------------
                                                 Kerry P. Gray, President
[seal]
</TABLE>
 
                                      A-24
<PAGE>   147
 
                                                                       EXHIBIT B
 
                        ADVISORY CAPITAL PARTNERS, INC.
                         176 Federal Street, 5th Floor
                          Boston, Massachusetts 02110
                    Tel: (617) 261-7682 Fax: (617) 261-1529
 
                                                                 October 3, 1995
 
Board of Directors
Chemex Pharmaceuticals, Inc.
One Executive Drive
Fort Lee, New Jersey 07024
 
Gentlemen:
 
     As described in the Merger Agreement and Plan of Reorganization dated
October 3, 1995 (the "Merger Agreement") by and between Chemex Pharmaceuticals,
Inc. ("Chemex") and Access Pharmaceuticals, Inc. ("Access"), Chemex and Access
have proposed to merge Access with and into Chemex by converting each share of
Access common stock into 3.7744 shares of Chemex common stock (the "Proposed
Transaction"). The number of Chemex shares that will be issued to Access common
stockholders will be 13,750,000, subject to adjustment in certain circumstances.
The terms and conditions of the Proposed Transactions are more fully set forth
in the Merger Agreement.
 
     You have requested our opinion as to the fairness, from a financial point
of view, to the holders of outstanding shares of common stock of Chemex (the
"Stockholders") of the Proposed Transaction.
 
     In connection with our opinion, we have, among other things, reviewed the
Merger Agreement, certain financial and other information of Chemex and Access,
including certain filings with the Securities and Exchange Commission, internal
analyses, reports, forecasts and other information. We have held discussions
with senior management of Chemex and Access concerning current operations,
financial condition and prospects of each of Chemex and Access and the companies
on a combined basis. We have visited Chemex's facility in Fort Lee, New Jersey,
and Access' facility in Dallas, Texas. In addition, we have conducted such other
studies, analyses, inquiries and investigations, and reviewed such other factors
as we deemed appropriate.
 
     We have assumed and relied upon, without independent verification, the
accuracy and completeness of all information received by us for purposes of this
opinion. With respect to financial projections, we have assumed that they have
been reasonably prepared on bases reflecting the best currently available
information and judgments of the future financial performance of Chemex and
Access. We have not made any independent valuation or appraisal of the assets or
liabilities of Chemex. We have assumed that the Proposed Transactions will be
treated as a tax free reorganization.
 
     Our opinion is necessarily based upon financial, economic, market and other
conditions as they exist on, and information made available to us as of, the
date hereof. It should be understood that, although subsequent developments may
affect this opinion, we do not have any obligation to update, revise or reaffirm
this opinion. Furthermore, we express no opinion as to the price or trading
range at which the Chemex stock will trade subsequent to the date of our
opinion. Payment of Advisory Capital Partners' fee is not contingent upon the
conclusion reported.
 
     Based upon the foregoing, it is our opinion as investment bankers that the
Proposed Transaction is fair, from a financial point of view, to the
Stockholders of Chemex.
<PAGE>   148
 
Board of Directors
Chemex Pharmaceuticals, Inc.
October 3, 1995
Page 2
 
   
     This letter is for the information of the Board of Directors in connection
with its consideration of the Proposed Transaction and does not constitute a
recommendation to any stockholder as to how such stockholder should vote on the
Proposed Transaction, and may not be used for any other purpose without our
prior written consent. We hereby consent, however, to the inclusion of this
opinion as an exhibit to any proxy or registration statement distributed in
connection with the Proposed Transactions.
    
 
                                          Sincerely yours,
 
                                          ADVISORY CAPITAL PARTNERS, INC.
 
                                          By: /s/ Frank W. Haydu III
 
                                            ------------------------------------
                                            Frank W. Haydu III
                                            Managing Director
 
                                       B-2
<PAGE>   149
 
                                                                       EXHIBIT C
 
            CERTAIN PROVISIONS OF THE TEXAS BUSINESS CORPORATION ACT
 
5.11 Rights of Dissenting Shareholders in the Event of Certain Corporate
Actions.
 
     A. Any shareholder of a domestic corporation shall have the right to
dissent from any of the following corporate actions:
 
          (1) Any plan of merger to which the corporation is a party if
     shareholder approval is required by Article 5.03 or 5.16 of this Act and
     the shareholder holds shares of a class or series that was entitled to vote
     thereon as a class or otherwise;
 
          (2) Any sale, lease, exchange or other disposition (not including any
     pledge, mortgage, deed of trust or trust indenture unless otherwise
     provided in the articles of incorporation) of all, or substantially all,
     the property and assets, with or without good will, of a corporation
     requiring the special authorization of the shareholders as provided by this
     Act;
 
          (3) Any plan of exchange pursuant to Article 5.02 of this Act in which
     the shares of the corporation of the class or series held by the
     shareholder are to be acquired.
 
     B. Notwithstanding the provisions of Section A of this Article, a
shareholder shall not have the right to dissent from any plan of merger in which
there is a single surviving or new domestic or foreign corporation, or from any
plan of exchange, if (1) the shares held by the shareholder are part of a class
shares of which are listed on a national securities exchange, or are held of
record by not less than 2,000 holders, on the record date fixed to determine the
shareholders entitled to vote on the plan of merger or the plan of exchange, and
(2) the shareholder is not required by the terms of the plan of merger or the
plan of exchange to accept for his shares any consideration other than (a)
shares of a corporation that, immediately after the effective time of the merger
or exchange, will be part of a class or series of shares of which are (i)
listed, or authorized for listing upon official notice of issuance, on a
national securities exchange, or (ii) held of record by not less than 2,000
holders, and (b) cash in lieu of fractional shares otherwise entitled to be
received.
 
5.12 Procedure for Dissent by Shareholders as to Said Corporate Actions.
 
     A. Any shareholder of any domestic corporation who has the right to dissent
from any of the corporate actions referred to in Article 5.11 of this Act may
exercise that right to dissent only by complying with the following procedures:
 
          (1) (a) With respect to proposed corporate action that is submitted to
     a vote of shareholders at a meeting, the shareholder shall file with the
     corporation, prior to the meeting, a written objection to the action,
     setting out that the shareholder's right to dissent will be exercised if
     the action is effective and giving the shareholder's address, to which
     notice thereof shall be delivered or mailed in that event. If the action is
     effected and the shareholder shall not have voted in favor of the action,
     the corporation, in the case of action other than a merger, or the
     surviving or new corporation (foreign or domestic) or other entity that is
     liable to discharge the shareholder's right of dissent, in the case of a
     merger, shall, within ten (10) days after the action is effected, deliver
     or mail to the shareholder written notice that the action has been
     effected, and the shareholder may within ten (10) days from the delivery or
     mailing of the notice, make written demand on the existing, surviving, or
     new corporation (foreign or domestic) or other entity, as the case may be,
     for payment of the fair value of the shareholder's shares. The fair value
     of the shares shall be the value thereof as of the day immediately
     preceding the meeting, excluding any appreciation or depreciation in
     anticipation of the proposed action. The demand shall state the number and
     class of the shares owned by the shareholder and the fair value of the
     shares as estimated by the shareholder. Any shareholder failing to make
     demand within the ten (10) day period shall be bound by the action.
 
             (b) With respect to proposed corporate action that is approved
        pursuant to Section A of Article 9.10 of this Act, the corporation, in
        the case of action other than a merger, and the surviving or new
        corporation (foreign or domestic) or other entity that is liable to
        discharge the shareholder's
 
                                       C-1
<PAGE>   150
 
        right of dissent, in the case of a merger, shall, within ten (10) days
        after the date the action is effected, mail to each shareholder of
        record as of the effective date of the action notice of the fact and
        date of the action and that the shareholder may exercise the
        shareholder's right to dissent from the action. The notice shall be
        accompanied by a copy of this Article and any articles or documents
        filed by the corporation with the Secretary of State to effect the
        action. If the shareholder shall not have consented to the taking of the
        action, the shareholder may, within twenty (20) days after the mailing
        of the notice, make written demand on the existing surviving, or new
        corporation (foreign or domestic) or other entity, as the case may be,
        for payment of the fair value of the shareholder's shares. The fair
        value of the shares shall be the value thereof as of the date the
        written consent authorizing the action was delivered to the corporation
        pursuant to Section A of Article 9.10 of this Act, excluding any
        appreciation or depreciation in anticipation of the action. The demand
        shall state the number and class of shares owned by the dissenting
        shareholder and the fair value of the shares as estimated by the
        shareholder. Any shareholder failing to make demand within the twenty
        (20) day period shall be bound by the action.
 
          (2) Within twenty (20) days after the receipt by the existing,
     surviving, or new corporation (foreign or domestic) or other entity, as the
     case may be, of a demand for payment made by a dissenting shareholder in
     accordance with Subsection (1) of this Section, the corporation (foreign or
     domestic) or other entity shall deliver or mail to the shareholder a
     written notice that shall either set out that the corporation (foreign or
     domestic) or other entity accepts the amount claimed in the demand and
     agrees to pay that amount within ninety (90) days after the date on which
     the action was effected, and, in the case of shares represented by
     certificates, upon the surrender of the certificates duly endorsed, or
     shall contain an estimate by the corporation (foreign or domestic) or other
     entity of the fair value of the shares, together with an offer to pay the
     amount of that estimate within ninety (90) days after the date on which the
     action was effected, upon the receipt of notice within sixty (60) days
     after that date from the shareholder that the shareholder agrees to accept
     that amount and, in the case of shares represented by certificates, upon
     the surrender of the certificates duly endorsed.
 
          (3) If, within sixty (60) days, after the date on which the corporate
     action was effected, the value of the shares is agreed upon between the
     shareholder and the existing surviving, or new corporation (foreign or
     domestic) or other entity, as the case may be, payment for the shares shall
     be made within ninety (90) days after the date on which the action was
     effected and, in the case of shares represented by certificates, upon
     surrender of the certificates duly endorsed. Upon payment of the agreed
     value, the shareholder shall cease to have any interest in the shares or in
     the corporation.
 
     B. If, within the period of sixty (60) days after the date on which the
corporate action was effected, the shareholder and the existing, surviving, or
new corporation (foreign or domestic) or other entity, as the case may be, do
not so agree, then the shareholder or the corporation (foreign or domestic) or
other entity may, within sixty (60) days after the expiration of the sixty (60)
day period, file a petition in any court of competent jurisdiction in the county
in which the principal office of the domestic corporation is located, asking for
a finding and determination of the fair value of the shareholder's shares. Upon
the filing of any such petition by the shareholder, service of a copy thereof
shall be made upon the corporation (foreign or domestic) or other entity, which
shall, within ten (10) days after service, file in the office of the clerk of
the court in which the petition was filed a list containing the names and
addresses of all shareholders of the domestic corporation who have demanded
payment for their shares and with whom agreements as to the value of their
shares have not been reached by the corporation (foreign or domestic) or other
entity. If the petition shall be filed by the corporation (foreign or domestic)
or other entity, the petition shall be accompanied by such a list. The clerk of
the court shall give notice of the time and place fixed for the hearing of the
petition by registered mail to the corporation (foreign or domestic) or other
entity and to the shareholders named on the list at the addresses therein
stated. The forms of the notices by mail shall be approved by the court. All
shareholders thus notified and the corporation (foreign or domestic) or other
entity shall thereafter be bound by the final judgment of the court.
 
     C. After the hearing of the petition, the court shall determine the
shareholders who have complied with the provisions of this Article and have
become entitled to the valuation of and payment for their shares, and
 
                                       C-2
<PAGE>   151
 
shall appoint one or more qualified appraisers to determine that value. The
appraisers shall have power to examine any of the books and records of the
corporation the shares of which they are charged with the duty of valuing, and
they shall make a determination of the fair value of the shares upon such
investigation as to them may seem proper. The appraisers shall also afford a
reasonable opportunity to the parties interested to submit to them pertinent
evidence as to the value of the shares. The appraisers shall also have such
power and authority as may be conferred on Masters in Chancery by the Rules of
Civil Procedure or by the order of their appointment.
 
     D. The appraisers shall determine the fair value of the shares of the
shareholders adjudged by the court to be entitled to payment for their shares
and shall file their report of that value in the office of the clerk of the
court. Notice of the filing of the report shall be given by the clerk to the
parties in interest. The report shall be subject to exception to be heard before
the court both upon the law and the facts. The court shall by its judgment
determine the fair value of the shares of the shareholders entitled to payment
for their shares and shall direct the payment of that value by the existing,
surviving, or new corporation (foreign or domestic) or other entity, together
with interest thereon, beginning 91 days after the date on which the applicable
corporate action from which the shareholder elected to dissent was effected to
the date of such judgment, to the shareholders entitled to payment. The judgment
shall be payable to the holders of uncertificated shares immediately but to the
holders of shares represented by certificates only upon, and simultaneously with
the surrender to the existing, surviving, or new corporation (foreign or
domestic) or other entity, as the case may be, of duly endorsed certificates for
those shares. Upon payment of the judgment, the dissenting shareholders shall
cease to have any interest in those shares or in the corporation. The court
shall allow the appraisers a reasonable fee as court costs, and all court costs
shall be allotted between the parties in the manner that the court determines to
be fair and equitable.
 
     E. Shares acquired by the existing, surviving, or new corporation (foreign
or domestic) or other entity, as the case may be, pursuant to the payment of the
agreed value of the shares or pursuant to payment of the judgment entered for
the value of the shares, as in this Article provided, shall, in the case of a
merger, be treated as provided in the plan of merger and, in all other cases,
may be held and disposed of by the corporation as in the case of other treasury
shares.
 
     F. The provisions of this Article shall not apply to a merger if, on the
date of the filing of the articles of merger, the surviving corporation is the
owner of all the outstanding shares of the other corporations, domestic or
foreign, that are parties to the merger.
 
     G. In the absence of fraud in the transaction, the remedy provided by this
Article to a shareholder objecting to any corporate action referred to in
Article 5.11 of this Act is the exclusive remedy for the recovery of the value
of his shares or money damages to the shareholder with respect to the action. If
the existing, surviving, or new corporation (foreign or domestic) or other
entity, as the case may be, complies with the requirements of this Article, any
shareholder who fails to comply with the requirements of this Article shall not
be entitled to bring suit for the recovery of the value of his shares or money
damages to the shareholder with respect to the action.
 
5.13 Provisions Affecting Remedies of Dissenting Shareholders.
 
     A. Any shareholder who has demanded payment for his shares in accordance
with either Article 5.12 or 5.16 of this Act shall not thereafter be entitled to
vote or exercise any other rights of a shareholder except the right to receive
payment for his shares pursuant to the provisions of those articles and the
right to maintain an appropriate action to obtain relief on the ground that the
corporate action would be or was fraudulent, and the respective shares for which
payment has been demanded shall not thereafter be considered outstanding for the
purposes of any subsequent vote of shareholders.
 
     B. Upon receiving a demand for payment from any dissenting shareholder, the
corporation shall make an appropriate notation thereof in its shareholder
records. Within twenty (20) days after demanding payment for his shares in
accordance with either Article 5.12 or 5.16 of this Act, each holder of
certificates representing shares so demanding payment shall submit such
certificates to the corporation for notation thereon that such demand has been
made. The failure of holders of certificated shares to do so shall, at the
option of the
 
                                       C-3
<PAGE>   152
 
corporation, terminate such shareholder's rights under Article 5.12 and 5.16 of
this Act unless a court of competent jurisdiction for good and sufficient cause
shown shall otherwise direct. If uncertificated shares for which payment has
been demanded or shares represented by a certificate on which notation has been
so made shall be transferred, any new certificate issued therefor shall bear
similar notation together with the name of the original dissenting holder of
such shares and a transferee of such shares shall acquire by such transfer no
rights in the corporation other than those which the original dissenting
shareholder had after making demand for payment of the fair value thereof.
 
     C. Any shareholder who has demanded payment for his shares in accordance
with either Article 5.12 or 5.16 of this Act may withdraw such demand at any
time before payment for his shares or before any petition has been filed
pursuant to Article 5.12 or 5.16 of this Act asking for a finding and
determination of the fair value of such shares, but no such demand may be
withdrawn after such payment has been made or, unless the corporation shall
consent thereto, after any such petition has been filed. If, however, such
demand shall be withdrawn as hereinbefore provided, or if pursuant to Section B
of this Article the corporation shall terminate the shareholder's rights under
Article 5.12 or 5.16 of this Act, as the case may be, or if no petition asking
for a finding and determination of fair value of such shares by a court shall
have been filed within the time provided in Article 5.12 or 5.16 of this Act, as
the case may be, or if after the hearing of a petition filed pursuant to Article
5.12 or 5.16, the court shall determine that such shareholder is not entitled to
the relief provided by those articles, then, in any such case, such shareholder
and all persons claiming under him shall be conclusively presumed to have
approved and ratified the corporate action from which he dissented and shall be
bound thereby, the right of such shareholder to be paid the fair value of his
shares shall cease, and his status as a shareholder shall be restored without
prejudice to any corporate proceedings which may have been taken during the
interim, and such shareholder shall be entitled to receive any dividends or
other distributions made to shareholders in the interim.
 
                                       C-4
<PAGE>   153
 
                                                                       EXHIBIT D
 
              SECTION 262 OF THE DELAWARE GENERAL CORPORATION LAW
 
     262 APPRAISAL RIGHTS.  (a) Any stockholder of a corporation of this State
who holds shares of stock on the date of the making of a demand pursuant to
subsection (d) of this section with respect to such shares, who continuously
holds such shares through the effective date of the merger or consolidation, who
has otherwise complied with subsection (d) of this section and who has neither
voted in favor of the merger or consolidation nor consented thereto in writing
pursuant to sec.228 of this title shall be entitled to an appraisal by the Court
of Chancery of the fair value of his shares of stock under the circumstances
described in subsections (b) and (c) of this section. As used in this section,
the word "stockholder" means a holder of record of stock in a stock corporation
and also a member of record of a nonstock corporation; the words "stock" and
"share" mean and include what is ordinarily meant by those words and also
membership or membership interest of a member of a nonstock corporation; and the
words "depository receipt" mean a receipt or other instrument issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.
 
          (b) Appraisal rights shall be available for the shares of any class or
     series of stock of a constituent corporation in a merger or consolidation
     to be effected pursuant to sec.251, 252, 254, 257, 258, 263 or 264 of this
     title:
 
             (1) Provided, however, that no appraisal rights under this section
        shall be available for the shares of any class or series of stock which
        stock, or depository receipts in respect thereof, at the record date
        fixed to determine the stockholders entitled to receive notice of and to
        vote at the meeting of stockholders to act upon the agreement of merger
        or consolidation, were either (i) listed on a national securities
        exchange or designated as a national market system security on an
        interdealer quotation system by the National Association of Securities
        Dealers, Inc. or (ii) held of record by more than 2,000 stockholders;
        and further provided that no appraisal rights shall be available for any
        shares of stock of the constituent corporation surviving a merger if the
        merger did not require for its approval the vote of the stockholders of
        the surviving corporation as provided in subsections (f) or (g) of
        sec.251 of this title.
 
             (2) Notwithstanding paragraph (1) of this subsection, appraisal
        rights under this section shall be available for the shares of any class
        or series of stock of a constituent corporation if the holders thereof
        are required by the terms of an agreement of merger or consolidation
        pursuant to sec.sec.251, 252, 254, 257, 258, 263 and 264 of this title
        to accept for such stock anything except:
 
                a. Shares of stock of the corporation surviving or resulting
           from such merger or consolidation, or depository receipts in respect
           thereof;
 
                b. Shares of stock of any other corporation, or depository
           receipts in respect thereof, which shares of stock or depository
           receipts at the effective date of the merger or consolidation will be
           either listed on a national securities exchange or designated as a
           national market system security on an interdealer quotation system by
           the National Association of Securities Dealers, Inc. or held of
           record by more than 2,000 stockholders;
 
                c. Cash in lieu of fractional shares or fractional depository
           receipts described in the foregoing subparagraphs a. and b. of this
           paragraph; or
 
                d. Any combination of the shares of stock, depository receipts
           and cash in lieu of fractional shares or fractional depository
           receipts described in the foregoing subparagraphs a., b. and c. of
           this paragraph.
 
             (3) In the event all of the stock of a subsidiary Delaware
        corporation party to a merger effected under sec.253 of this title is
        not owned by the parent corporation immediately prior to the merger,
        appraisal rights shall be available for the shares of the subsidiary
        Delaware corporation.
 
                                       D-1
<PAGE>   154
 
          (c) Any corporation may provide in its certificate of incorporation
     that appraisal rights under this section shall be available for the shares
     of any class or series of its stock as a result of an amendment to its
     certificate of incorporation, any merger or consolidation in which the
     corporation is a constituent corporation or the sale of all or
     substantially all of the assets of the corporation. If the certificate of
     incorporation contains such a provision, the procedures of this section,
     including those set forth in subsections (d) and (e) of this section, shall
     apply as nearly as is practicable.
 
          (d) Appraisal rights shall be perfected as follows:
 
             (1) If a proposed merger or consolidation for which appraisal
        rights are provided under this section is to be submitted for approval
        at a meeting of stockholders, the corporation, not less than 20 days
        prior to the meeting, shall notify each of its stockholders who was such
        on the record date for such meeting with respect to shares for which
        appraisal rights are available pursuant to subsections (b) or (c) hereof
        that appraisal rights are available for any or all of the shares of the
        constituent corporations, and shall include in such notice a copy of
        this section. Each stockholder electing to demand the appraisal of his
        shares shall deliver to the corporation, before the taking of the vote
        on the merger or consolidation, a written demand for appraisal of his
        shares. Such demand will be sufficient if it reasonably informs the
        corporation of the identity of the stockholder and that the stockholder
        intends thereby to demand the appraisal of his shares. A proxy or vote
        against the merger or consolidation shall not constitute such a demand.
        A stockholder electing to take such action must do so by a separate
        written demand as herein provided. Within 10 days after the effective
        date of such merger or consolidation, the surviving or resulting
        corporation shall notify each stockholder of each constituent
        corporation who has complied with this subsection and has not voted in
        favor of or consented to the merger or consolidation of the date that
        the merger or consolidation has become effective; or
 
             (2) If the merger or consolidation was approved pursuant to sec.228
        or 253 of this title, the surviving or resulting corporation, either
        before the effective date of the merger or consolidation or within 10
        days thereafter, shall notify each of the stockholders entitled to
        appraisal rights to the effective date of the merger or consolidation
        and that appraisal rights are available for any or all of the shares of
        the constituent corporation, and shall include in such notice a copy of
        this section. The notice shall be sent by certified or registered mail,
        return receipt requested, addressed to the stockholder at his address as
        it appears on the records of the corporation. Any stockholder entitled
        to appraisal rights may, within 20 days after the date of mailing of the
        notice, demand in writing from the surviving or resulting corporation
        the appraisal of his shares. Such demand will be sufficient if it
        reasonably informs the corporation of the identity of the stockholder
        and that the stockholder intends thereby to demand the appraisal of his
        shares.
 
          (e) Within 120 days after the effective date of the merger or
     consolidation, the surviving or resulting corporation or any stockholder
     who has complied with subsections (a) and (d) hereof and who is otherwise
     entitled to appraisal rights, may file a petition in the Court of Chancery
     demanding a determination of the value of the stock of all such
     stockholders. Notwithstanding the foregoing, at any time within 60 days
     after the effective date of the merger or consolidation, any stockholder
     shall have the right to withdraw his demand for appraisal and to accept the
     terms offered upon the merger or consolidation. Within 120 days after the
     effective date of the merger or consolidation, any stockholder who has
     complied with the requirements of subsections (a) and (d) hereof, upon
     written request, shall be entitled to receive from the corporation
     surviving the merger or resulting from the consolidation a statement
     setting forth the aggregate number of shares not voted in favor of the
     merger or consolidation and with respect to which demands for appraisal
     have been received and the aggregate number of holders of such shares. Such
     written statement shall be mailed to the stockholder within 10 days after
     his written request for such a statement is received by the surviving or
     resulting corporation or within 10 days after expiration of the period for
     delivery of demands for appraisal under subsection (d) hereof, whichever is
     later.
 
                                       D-2
<PAGE>   155
 
          (f) Upon the filing of any such petition by a stockholder, service of
     a copy thereof shall be made upon the surviving or resulting corporation,
     which shall within 20 days after such service file in the office of the
     Register in Chancery in which the petition was filed a duly verified list
     containing the names and addresses of all stockholders who have demanded
     payment for their shares and with whom agreements as to the value of their
     shares have not been reached by the surviving or resulting corporation. If
     the petition shall be filed by the surviving or resulting corporation, the
     petition shall be accompanied by such a duly verified list. The Register in
     Chancery, if so ordered by the Court, shall give notice of the time and
     place fixed for the hearing of such petition by registered or certified
     mail to the surviving or resulting corporation and to the stockholders
     shown on the list at the addresses therein stated. Such notice shall also
     be given by 1 or more publications at least 1 week before the date of the
     hearing, in a newspaper of general circulation published in the City of
     Wilmington, Delaware or such publication as the Court deems advisable. The
     forms of the notices by mail and by publication shall be approved by the
     Court, and the costs thereof shall be borne by the surviving or resulting
     corporation.
 
          (g) At the hearing on such petition, the Court shall determine the
     stockholders who have complied with this section and who have become
     entitled to appraisal rights. The Court may require the stockholders who
     have demanded an appraisal for their shares and who hold stock represented
     by certificates to submit their certificates of stock to the Register in
     Chancery for notation thereon of the pendency of the appraisal proceedings,
     and if any stockholder fails to comply with such direction, the Court may
     dismiss the proceedings as to such stockholder.
 
          (h) After determining the stockholders entitled to an appraisal, the
     Court shall appraise the shares, determining their fair value exclusive of
     any element of value arising from the accomplishment or expectation of the
     merger or consolidation, together with a fair rate of interest, if any, to
     be paid upon the amount determined to be the fair value. In determining
     such fair value, the Court shall take into account all relevant factors. In
     determining the fair rate of interest, the Court may consider all relevant
     factors, including the rate of interest which the surviving or resulting
     corporation would have had to pay to borrow money during the pendency of
     the proceeding. Upon application by the surviving or resulting corporation
     or by any stockholder entitled to participate in the appraisal proceeding,
     the Court may in its discretion, permit discovery or other pretrial
     proceedings and may proceed to trial upon the appraisal prior to the final
     determination of the stockholder entitled to an appraisal. Any stockholder
     whose name appears on the list filed by the surviving or resulting
     corporation pursuant to subsection (f) of this section and who has
     submitted his certificates of stock to the Register in Chancery, if such is
     required, may participate fully in all proceedings until it is finally
     determined that he is not entitled to appraisal rights under this section.
 
          (i) The Court shall direct the payment of the fair value of the
     shares, together with interest, if any, by the surviving or resulting
     corporation to the stockholders entitled thereto. Interest may be simple or
     compounded, as the Court may direct. Payment shall be so made to each such
     stockholder, in the case of holders of uncertificated stock forthwith, and
     the case of holders of shares represented by certificates upon the
     surrender to the corporation of the certificates representing such stock.
     The Court's decree may be enforced as other decrees in the Court of
     Chancery may be enforced, whether such surviving or resulting corporation
     be a corporation of this State or of any state.
 
          (j) The costs of the proceeding may be determined by the Court and
     taxed upon the parties as the Court deems equitable in the circumstances.
     Upon application of a stockholder the Court may order all or a portion of
     the expenses incurred by any stockholder in connection with the appraisal
     proceeding, including, without limitation, reasonable attorney's fees and
     the fees and expenses of experts, to be charged pro rata against the value
     of all the shares entitled to an appraisal.
 
          (k) From and after the effective date of the merger or consolidation,
     no stockholder who has demanded his appraisal rights as provided in
     subsection (d) of this section shall be entitled to vote such stock for any
     purpose or to receive payment of dividends or other distributions on the
     stock (except dividends or other distributions payable to stockholders of
     record at a date which is prior to the effective date of the merger or
     consolidation); provided, however, that if no petition for an appraisal
     shall be filed
 
                                       D-3
<PAGE>   156
 
     within the time provided in subsection (e) of this section, or if such
     stockholder shall deliver to the surviving or resulting corporation a
     written withdrawal of his demand for an appraisal and an acceptance of the
     merger or consolidation, either within 60 days after the effective date of
     the merger or consolidation as provided in subsection (e) of this section
     or thereafter with the written approval of the corporation, then the right
     of such stockholder to an appraisal shall cease. Notwithstanding the
     foregoing, no appraisal proceeding in the Court of Chancery shall be
     dismissed as to any stockholder without the approval of the Court, and such
     approval may be conditioned upon such terms as the Court deems just.
 
          (l) The shares of the surviving or resulting corporation to which the
     shares of such objecting stockholders would have been converted had they
     assented to the merger or consolidation shall have the status of authorized
     and unissued shares of the surviving or resulting corporation.
 
                                       D-4
<PAGE>   157
 
                                                                       EXHIBIT E
 
                          CERTIFICATE OF AMENDMENT OF
                          CERTIFICATE OF INCORPORATION
                                       OF
                          CHEMEX PHARMACEUTICALS, INC.
 
     CHEMEX PHARMACEUTICALS, INC., a corporation organized under the General
Corporation Law of the State of Delaware (the "Corporation"),
 
DOES HEREBY CERTIFY:
 
     FIRST: That by written consent of all of the directors of the Corporation,
a resolution was duly adopted setting forth a proposed amendment of the
Certificate of Incorporation of the Company, declaring such proposed amendment
to be advisable and calling a meeting of the stockholders of the Corporation for
consideration thereof. The resolution setting forth the proposed amendment is as
follows:
 
     RESOLVED: That it is advisable that Article V, Sections A and B of the
Company's Certificate of Incorporation be amended to read in their entirety as
follows; and that such Article V, Sections A and B of the Company's Certificate
of Incorporation be amended to read in their entirety as follows:
 
          A. The aggregate number of shares of common stock which the
     Corporation shall have authority to issue is Forty Million (40,000,000)
     shares with a par value of four cents ($0.04) per share.
 
          B. The aggregate number of shares of preferred stock which the
     Corporation shall have authority to issue is Ten Million (10,000,000)
     shares with a par value of one cent ($0.01) per share in one or more
     series. Each series of preferred stock shall be designated by the board of
     directors so as to distinguish the shares thereof and the shares of all
     other series and classes. The board of directors may, by resolution, from
     time to time divide shares of the preferred stock into series and fix and
     determine the number of shares and the relative rights and preferences of
     any series so established, which relative rights and preferences may be
     greater or lesser than those granted to the common stock as provided
     herein. Notwithstanding the foregoing, all shares of preferred stock shall
     be identical, except as to the following relative rights and preferences,
     in respect of any or all of which there may be variations between different
     series, namely, the rate of dividends (including the date from which
     dividends shall be cumulative), the price at, and the terms and conditions
     on which, shares may be redeemed, the amounts payable on shares in the
     event of voluntary or involuntary liquidation or dissolution, sinking fund
     provisions for the redemption or purchase of shares in the event shares of
     any series or issue with sinking fund provisions, and the terms and
     conditions on which shares of any series may be converted in the event
     shares of any series are issued a privilege of conversion. Each share of
     any series of preferred stock shall be identical with all the shares of
     such series. The consideration for the issuance of shares may be paid in
     whole or in part in money and other property, tangible or intangible, or in
     labor or in services actually performed for the Corporation. When payment
     of the consideration for which shares are to be issued has been received
     or, when payment of the capital consideration has been received and the
     Corporation has received a binding obligation from the purchaser to pay the
     balance of the purchase price; such shares shall be deemed to be fully paid
     and not liable for any further call or assessment thereon.
 
     SECOND: That thereafter, pursuant to resolution of its Board of Directors,
a meeting of the stockholders of the Corporation was duly called and held, upon
notice in accordance with Section 222 of the General Corporation Law of the
State of Delaware at which meeting the necessary number of shares as required by
the General Corporation Law of the State of Delaware voted in favor of the
amendment.
 
     THIRD: That such amendment was duly adopted in accordance with the
provisions of Section 242 of the General Corporation Law of the State of
Delaware.
 
     FOURTH: That the capital of the Corporation shall not be reduced under or
by reason of said amendment.
 
                                       E-1
<PAGE>   158
 
     FIFTH: That the effective date of this amendment shall be             ,
199 .
 
     IN WITNESS WHEREOF, Chemex Pharmaceuticals, Inc. has caused this
Certificate to be executed by Herbert H. McDade, Jr., its Chief Executive
Officer, this      day of           , 1996.
 
                                          By:
 
                                            ------------------------------------
                                                   Herbert H. McDade, Jr.
                                                  Chief Executive Officer
 
ATTEST:
 
        ------------------------------
              Justin P. Morreale
             Assistant Secretary
 
                                       E-2
<PAGE>   159
 
                             CERTIFICATE OF MERGER
                                       OF
                          ACCESS PHARMACEUTICALS, INC.
                                 WITH AND INTO
                          CHEMEX PHARMACEUTICALS, INC.
 
     The undersigned hereby certify as follows:
 
     (1) That the respective names and states of incorporation of each of the
constituent corporations to the merger hereby effected (the "Merger") are Chemex
Pharmaceuticals, Inc., a Delaware corporation, and ACCESS Pharmaceuticals, Inc.,
a Texas corporation.
 
     (2) An Agreement of Merger and Plan of Reorganization, dated as of October
  , 1995 (the "Merger Agreement"), has been approved, adopted, certified,
executed and acknowledged by each of the constituent corporations to the Merger
in accordance with Title 8, Chapter 1, Section 252 of the Delaware Code.
 
     (3) The name of the surviving corporation of the merger is Chemex
Pharmaceuticals, Inc.
 
     (4) The Certificate of Incorporation and By-laws, respectively, of Chemex
Pharmaceuticals, Inc., a corporation organized under the laws of the State of
Delaware, as amended and in effect immediately prior to the effective time of
the Merger, shall be the Certificate of Incorporation and By-laws, respectively,
of the surviving corporation, except that Article I of the Certificate of
Incorporation is hereby amended to change the name of the surviving corporation
to ACCESS Pharmaceuticals, Inc.
 
     (5) A copy of the executed Merger Agreement is on file at the principal
place of business of the surviving corporation and its address is:
 
     2600 North Stemmons Freeway
     Suite 210
     Dallas, Texas 75207
 
     (6) A copy of the Merger Agreement will be furnished on request and without
cost to any stockholder of either of the constituent corporations.
 
     (7) The respective officers and directors of the surviving corporation
shall be as follows:
 
<TABLE>
<S>                                           <C>
Officers:
President and Chief Executive Officer         Kerry P. Gray
Executive Vice President                      Dr. David F. Ranney
Secretary                                     Herbert H. McDade, Jr.
Assistant Secretary                           Stephen B. Thompson
Assistant Secretary                           Justin P. Morreale
</TABLE>
 
     Directors:
 
     Class 1
 
- ---------------------------------------
 
- ---------------------------------------
 
     Class 2
     Dr. David F. Ranney
     Elizabeth M. Greetham
 
     Class 3
 
     Kerry P. Gray
     Herbert H. McDade, Jr.
     J. Michael Flinn
 
                                       E-3
<PAGE>   160
 
     Each to hold office until his or her successor is duly elected or appointed
and qualified in the manner provided for in the Certificate of Incorporation and
By-laws of the surviving corporation.
 
     (8) The authorized capital stock of ACCESS Pharmaceuticals, Inc., a
corporation organized under the laws of the State of Texas, consists of
10,000,000 shares of common stock, $0.01 par value per share and 1,000,000
shares of preferred stock, par value $0.10 per share.
 
     (9) This Certificate of Merger shall become effective upon the later of (i)
the filing thereof with the Secretary of State of the State of Delaware or (ii)
the filing of Articles of Merger with the Secretary of State of the State of
Texas.
 
<TABLE>
<S>                                              <C>
Executed on               , 1996.
Chemex Pharmaceuticals, Inc.                     Access Pharmaceuticals, Inc.
By:                                              By:
- ---------------------------------------------    ---------------------------------------------
Name: Herbert H. McDade, Jr.                     Name: Kerry P. Gray
Title:  Chief Executive Officer                  Title:  President

ATTEST:                                          ATTEST:
By:                                              By:
- ---------------------------------------------    ---------------------------------------------
Name:                                            Name:
Title:                                           Title:
</TABLE>
 
                                       E-4
<PAGE>   161
 
                                                                       EXHIBIT F
 
                          CHEMEX PHARMACEUTICALS, INC.
 
                             1995 STOCK OPTION PLAN
 
     1. DEFINITIONS.  As used in this 1995 Stock Option Plan of Chemex
Pharmaceuticals, Inc., the following terms shall have the following meanings:
 
     Award means the grant or sale pursuant to the Plan of any Option or SAR.
 
     Code means the Internal Revenue Code of 1986, as amended.
 
     Committee means a committee comprised of two or more Directors of the
Company, appointed by the Board of Directors of the Company, responsible for the
administration of the Plan, as provided in Section 4.
 
     Company means Chemex Pharmaceuticals, Inc., a Delaware corporation.
 
     Grant Date means the date on which an Option or SAR is granted, as
specified in Section 7 or Section 10.
 
     Incentive Option means an Option that satisfies the requirements of Section
422 of the Code.
 
     Market Value means the closing bid price, if available, or otherwise the
mean between the high and low sale prices of Common Stock on the stock exchange
or market on which Common Stock is primarily traded on the date as of which such
value is being determined or, if there shall be no bid or sale on that date, the
fair market value for a share of the Stock on such date shall be as determined
by the Committee.
 
     Nonstatutory Option means an Option that will not be treated as an
Incentive Option.
 
     Option means an option to purchase shares of the Stock granted under the
Plan, which shall be either an Incentive Option, Nonstatutory Option or Stock
Appreciation Right.
 
     Option Agreement means an agreement between the Company and an Optionee,
setting forth the terms and conditions of an Option.
 
     Optionee means a person eligible to receive an Option, as provided in
Section 6 or Section 10, to whom an Option shall have been granted under the
Plan.
 
     Participant means any person to whom an Award shall have been granted.
 
     Person means any individual, corporation, partnership or other person or
entity, together with its "Affiliates" and "Associates" (as defined in Rule
12b-2 under the Securities Exchange Act of 1934).
 
     Plan means this 1995 Stock Option Plan of the Company, as amended.
 
     Stock means the Common Stock, $.04 par value per share, of the Company.
 
     Stock Appreciation Right means the right, pursuant to an Award granted
under Section 11 below, to surrender to the Company all (or a portion) of an
Option in exchange for an amount equal to the difference between (i) the Market
Value, as of the date such Option (or such portion thereof) is surrendered, of
the shares of Stock covered by such Option (or such portion thereof) and (ii)
the aggregate exercise price of such Option (or such portion thereof).
 
     2. PURPOSE.  The Plan is intended to encourage ownership of the Stock by
employees, consultants and directors of the Company and its subsidiaries and is
intended to provide additional incentive for them to promote the success of the
Company's business. The Plan is intended to be an incentive stock option plan
within the meaning of Section 422 of the Code, but not all Options granted
hereunder are required to be or to remain Incentive Options.
 
     3. TERM OF THE PLAN.  Options under the Plan may be granted on or after
September 14, 1995 but not later than September 14, 2005.
 
                                       F-1
<PAGE>   162
 
     4. ADMINISTRATION.  The Plan shall be administered by the Committee. No
member of the Committee shall have received an Option during service on the
Committee or during the one-year period preceding such service, other than an
Option received pursuant to Section 10. Subject to the provisions of the Plan,
the Committee shall have complete authority, in its discretion, to make the
following determinations with respect to each Option to be granted by the
Company to any employee of the Company or a subsidiary: (a) whether the Option
will be an Incentive Option, Nonstatutory Option or Stock Appreciation Right;
(b) the person to receive the Option; (c) the time of granting the Option; (d)
the number of shares subject to the Option; (e) the option price; (f) the
vesting period (if any) applicable to, and the term of, any Option; (g) the
restrictions (if any) to be imposed upon transfer of shares of the Stock
purchased by the Optionee upon the exercise of the Option; and (h) whether and
under what circumstances an Option may be settled in cash or Stock. The
Committee shall have complete authority to interpret the Plan, to prescribe,
amend and rescind rules and regulations relating to it, to determine the terms
and provisions of the respective option agreements (which need not be
identical), and to make all other determinations necessary or advisable for the
administration of the Plan. The Committee's determination on the matters
referred to in this Section 4 shall be conclusive.
 
     5. STOCK SUBJECT TO THE PLAN.  The Plan covers 2,000,000 shares of Stock,
subject, however, to the provisions of Section 17. The number of shares
purchased pursuant to the exercise of Options granted under the Plan and the
number of shares subject to outstanding Options granted under the Plan shall be
charged against the shares covered by the Plan; but shares subject to Options
which terminated without being exercised shall not be so charged. Shares to be
issued upon the exercise of Options granted under the Plan may be either
authorized but unissued shares or shares held by the Company in its treasury. If
any Option expires or terminates for any reason without having been exercised in
full, the shares not purchased thereunder shall again be available for Options
thereafter to be granted.
 
     6. ELIGIBILITY.  An Incentive Option may be granted only to an employee of
the Company or one or more of its subsidiaries. A Nonstatutory Option or Stock
Appreciation Right may be granted to any person designated by the Committee. Any
person who, within the meaning of Section 422(b)(6) of the Code, is deemed to
own stock possessing more than 10% of the total combined voting power of all
classes of stock of the Company (or of a parent or subsidiary corporation
thereof) shall be eligible to receive an Incentive Option only if the option
price of such Incentive Option is at least 110% of the Market Value as of the
Grant Date and the term of such Incentive Option is not more than five years.
 
     7. TIME OF GRANTING OPTIONS.  Subject to the provisions of the Plan, the
granting of Options shall take place at the time specified by the Committee.
 
     8. OPTION PRICE.  Subject to the provisions of the Plan, the option price
shall be determined by the Committee, but the option price for each Incentive
Option shall be the Market Value on the Grant Date.
 
     9. MAXIMUM SIZE OF OPTIONS.  The aggregate Market Value of Stock for which
Incentive Options become exercisable by an Optionee for the first time in any
calendar year shall not exceed $100,000. To the extent that such aggregate
Market Value exceeds $100,000, those Options intended to be Incentive Options
shall be treated as Nonstatutory Options. For purposes of this Section 9, all
Incentive Options granted to an Optionee by the Company shall be considered in
the order in which they were granted, and the Market Value shall be determined
as of each Grant Date. The maximum number of Options which may be granted in any
fiscal year to any one individual is 500,000.
 
     10. FORMULA AWARDS.
 
          10.1. AUTOMATIC GRANTS.  On each date that a Non-Employee Director (as
     defined below) is reelected to the Board of Directors by the stockholders
     of the Company, such Non-Employee Director shall receive a Nonstatutory
     Option for the purchase of 20,000 shares of Stock. On the date that a Non-
     Employee Director is initially elected or appointed by the Board of
     Directors such Non-Employee Director shall receive a Nonstatutory Option to
     purchase 30,000 shares of Stock.
 
          10.2. TERM AND VESTING.  Each Option granted under Section 10.1 shall
     expire at the earlier of (i) 90 days after such Non-Employee Director no
     longer serves as a director of the Company or (ii) the
 
                                       F-2
<PAGE>   163
 
     end of ten years and one day after the Grant Date. Each Option shall be
     fully exercisable six (6) months after the Grant Date.
 
          10.3. NON-EMPLOYEE DIRECTOR.  For purposes of the grant of Options
     hereunder upon appointment, election or reelection to the Board of
     Directors, "Non-Employee Director" shall mean a member of the Board of
     Directors who is not an employee of the Company on the date of such
     election or reelection, as applicable.
 
     11. STOCK APPRECIATION RIGHTS.
 
          11.1. PROVISION FOR GRANT.  Stock Appreciation Rights may be granted
     in conjunction with all or part of any Option granted under the Plan. In
     the case of a Nonstatutory Option, such rights may be granted either at or
     after the time of the grant of such Option. In the case of an Incentive
     Option, such rights may be granted only at the time of the grant of such
     Option.
 
          11.2. TERMINATION.  A Stock Appreciation right or applicable portion
     thereof granted with respect to a given Option shall terminate and no
     longer be exercisable upon the termination or exercise of the related Stock
     Option, except that, unless otherwise determined by the Committee at the
     time of grant, a Stock Appreciation Right granted with respect to less than
     the full number of shares covered by a related Option shall not be reduced
     until the number of shares covered by an exercise or termination of the
     related Option exceeds the number of shares not covered by the Stock
     Appreciation Right.
 
          11.3. MANNER AND EFFECT OF EXERCISE.  A stock Appreciation Right may
     be exercised by an Optionee, in accordance with Section 11.4, by
     surrendering the applicable portion of the related Option. Upon such
     exercise and surrender, the Optionee shall be entitled to receive an amount
     determined in the manner prescribed in Section 11.4. Options which have
     been so surrendered, in whole or in part, shall no longer be exercisable to
     the extent the related Stock Appreciation Right has been exercised.
 
          11.4. OTHER TERMS AND CONDITIONS.  Stock Appreciation Rights granted
     under the Plan shall be subject to the following terms and conditions, and
     shall contain such additional terms and conditions, not inconsistent with
     the provisions of the Plan, as the Committee shall deem appropriate:
 
             (a) EXERCISABILITY.  Stock Appreciation Rights shall be exercisable
        only at such time or times and to the extent that the Options to which
        they relate, if any, shall be exercisable in accordance with the
        provision of the Plan; provided, however, that a Stock Appreciation
        Right granted subsequent to the grant of the related Option shall not be
        exercisable during the first six months of its term; and provided,
        further, however, that a Stock Appreciation Right granted in connection
        with an Incentive Option may be exercised only if and when the market
        price of the Stock subject to the Incentive Option exceeds the exercise
        price of such Stock Option.
 
             (b) AMOUNT PAYABLE.  Upon the exercise of a Stock Appreciation
        Right, an Optionee shall be entitled to receive up to, but not more
        than, an amount in cash or shares of Stock equal in value to the excess
        of the Market Value of one share of Stock over the option price per
        share specified in the related Option, multiplied by the number of
        shares in respect of which the Stock Appreciation Right shall have been
        exercised. The Committee shall determine the form of payment.
 
             (c) TRANSFERABILITY.  Stock Appreciation Rights shall be
        transferable only when and to the extent that the underlying Option
        would be transferable under the Plan.
 
     12. EXERCISE OF OPTION.  In order to exercise an Option, the Optionee shall
give written notice of exercise to the Chief Financial Officer of the Company.
The Optionee shall enclose a personal check equal to the option price or shares
of Stock with a Market Value on the purchase date at least equal to the option
price. The Company shall deliver or cause to be delivered to the Optionee a
certificate for the number of shares then being purchased by him. If any law or
applicable regulation of the Securities and Exchange Commission or other body
having jurisdiction in the premises shall require the Company or the Optionee to
take any action in connection with shares being purchased upon exercise of the
Option, exercise of the Option and delivery of the certificate or certificates
for such shares shall be postponed until completion of the necessary action.
Each
 
                                       F-3
<PAGE>   164
 
outstanding Option shall be reduced by one share for each share of the Stock
purchased upon exercise of the option.
 
     13. PURCHASE FOR INVESTMENT.  Unless the shares to be issued upon exercise
of an Option have been effectively registered under the Securities Act of 1933
as now in force or hereafter amended, the Company shall be under no obligation
to issue any shares covered by any Option unless the person who exercises the
Option, in whole or in part, shall give a written representation to the Company,
satisfactory in form and substance to its counsel and upon which the Company may
reasonably rely, that he or she is acquiring such shares as an investment and
not with a view to, or for sale in connection with, the distribution of any such
shares. Each certificate representing a share of Stock issued pursuant to the
exercise of an Option may bear a reference to any investment representation made
in accordance with this Section 13 and to the fact that no registration
statement has been filed with the Securities and Exchange Commission in respect
to that Stock.
 
     14. WITHHOLDING; NOTICE OF DISPOSITION OF STOCK PRIOR TO EXPIRATION OF
SPECIFIED HOLDING PERIOD.
 
          14.1. Whenever shares are to be issued upon exercise of an Option, the
     Company shall have the right to require the Optionee to remit to the
     Company an amount sufficient to satisfy federal, state, local or other
     withholding tax requirements (whether so required to secure for the Company
     an otherwise available tax deduction or otherwise) if and to the extent
     required by law prior to the delivery of any certificate or certificates
     for such shares.
 
          14.2. The Company may require as a condition to the issuance of shares
     covered by any Incentive Option that the person exercising the Option give
     a written representation to the Company, satisfactory in form and substance
     to its counsel and upon which the Company may reasonably rely, that he or
     she will report to the Company any disposition of those shares prior to the
     expiration of the holding periods specified by Section 422(a)(1) of the
     Code. If and to the extent that the disposition imposes upon the Company
     federal, state, local or other withholding tax requirements, or any such
     withholding is required to secure for the Company an otherwise available
     tax deduction, the Company shall have the right to require that the person
     making the disposition remit to the Company an amount sufficient to satisfy
     those requirements.
 
     15. TRANSFERABILITY OF OPTIONS.  Options shall not be transferable,
otherwise than by will or the laws of descent and distribution, and may be
exercised during the life of the Optionee only by the Optionee; provided,
however, the Committee may grant Options that are transferable, without payment
of consideration, to immediate family members of the Optionee or to trusts or
partnerships for such family members. The Committee may also amend outstanding
Options to provide for such transferability.
 
     16. REORGANIZATION OF THE COMPANY.  Notwithstanding any provisions of this
Plan to the contrary, including those with respect to vesting contained herein,
Options herein granted may be exercised (in the manner set forth herein) for the
full number of shares covered upon the occurrence of any of the following events
subsequent to the effective date of this Plan (other than pursuant to the
currently contemplated merger of the Company and Access Pharmaceuticals, Inc.):
 
          (a) any Person or Persons acting as a group, become(s) after the date
     of this Agreement the "beneficial owner" (as defined in Rule 13d-3 under
     the Securities Exchange Act of 1934, as amended), directly or indirectly,
     of voting shares (or shares convertible into voting shares) representing
     25% or more of the Company's then outstanding voting shares (or shares
     convertible into voting shares); or
 
          (b) there shall be a sale of all, or substantially all, of the
     Company's assets, or the Company shall merge or consolidate with another
     corporation and the stockholders of the Company immediately prior to such
     transaction do not own, immediately after such transaction, stock of the
     purchasing or surviving corporation in this transaction (or of the parent
     corporation of the purchasing or surviving corporation) possessing more
     than 50% of the voting power (for the election of Directors) of the
     outstanding stock of that corporation, which ownership shall be measured
     without regard to any stock of the purchasing, surviving or parent
     corporation owned by the stockholders of the Company before the
     transaction;
 
provided, however, the provisions of this Section which would otherwise be
applicable, shall not apply to a merger or consolidation which does not change
any voting securityholder's percentage ownership of the
 
                                       F-4
<PAGE>   165
 
outstanding voting stock in any successor to the Company from the percentage of
such stock beneficially owned by such holder in the Company prior to such merger
or consolidation, and shall not apply to a transfer of all or substantially all
of the assets of the Company to a wholly-owned subsidiary of the Company.
 
     17. ADJUSTMENT OF NUMBER OF SHARES.  In the event of any stock dividend
payable in the Stock or any split-up or contraction in the number of shares of
the Stock occurring after the date of the agreement and prior to the exercise in
full of the Option, the number of shares for which the Option may thereafter be
exercised shall be proportionately adjusted. In case of any reclassification or
change of outstanding shares of the Stock, shares of stock or other securities
equivalent in kind and value to those shares which a holder would have received
if he or she had held the full number of shares of the Stock subject to the
Option immediately prior to such reclassification or change and had continued to
hold those shares (together with all other shares, stock and securities
thereafter issued in respect thereof) to the time of exercise of the Option
shall thereupon be subject to the Option. Subject to the provisions of Section
16, in case of any consolidation or merger of the Company with or into another
company or in case of any sale or conveyance to another company or entity of the
property of the Company as a whole, the Option shall terminate and, to the
extent that the value of the shares of stock, other securities or cash which a
stockholder is entitled to receive for one share of Stock in connection with
such transaction exceeds the option price of the Option, the Optionee shall be
entitled to receive either cash or shares of stock or other securities
equivalent in kind to the cash or those shares which a holder would have
received if he or she had exercised the Option in full (to the extent then
exercisable) and held the total number of shares of the Stock subject to such
Option immediately prior to such consolidation, merger, sale or conveyance and
with a value equal to such excess amount multiplied by the number of shares he
or she would have received if he or she so exercised the Option at such time.
Subject to the provisions of Section 16, upon dissolution or liquidation of the
Company, the Option shall terminate, but the Optionee (if at the time in the
employ of the Company or any of its subsidiaries) shall have the right,
immediately prior to such dissolution or liquidation, to exercise the Option to
the full extent not theretofore exercised. No fraction of a share shall be
purchasable or deliverable, but in the event any adjustment of the number of
shares covered by the Option shall cause such number to include a fraction of a
share, such fraction shall be adjusted to the nearest smaller whole number of
shares. In the event of changes in the outstanding Common Stock by reason of any
stock dividend, split-up, contraction, reclassification, or change of
outstanding shares of the Stock of the nature contemplated by this Section 17,
the number of shares of the Stock available for the purpose of the Plan as
stated in Section 5 shall be correspondingly adjusted.
 
     18. LIMITATION OF RIGHTS IN OPTION STOCK.  The Optionee shall have no
rights as a stockholder in respect of shares as to which his or her Option shall
not have been exercised, certificates issued and delivered and payment as herein
provided made in full, and shall have no rights with respect to such shares not
expressly conferred by this Plan.
 
     19. STOCK RESERVED.  The Company shall at all times during the term of the
Options reserve and keep available such number of shares of the Stock as will be
sufficient to satisfy the requirements of this Plan and shall pay all other fees
and expenses necessarily incurred by the Company in connection therewith.
 
     20. PURCHASE FOR INVESTMENT.  The Optionee shall make such representations
with respect to investment intent and the method of disposal of optioned shares
as the Board of Directors of the Company may deem advisable in order to assure
compliance with applicable securities laws.
 
     21. TERMINATION AND AMENDMENT OF PLAN.  The Board of Directors of the
Company may at any time terminate the Plan or make such modifications of the
Plan as it shall deem advisable, provided, however, that, if required by
applicable law with respect to a certain modification, the Board shall seek the
approval of such modification by the holders of a majority of the outstanding
Stock present or represented and entitled to vote at a meeting of the
stockholders of the Company, and further provided, that the Board of Directors
of the Company may not amend the Plan more than once in any six (6) month period
so as to modify Section 10, except that the Board of Directors may make an
amendment to Section 10 to comport with changes in the Code, the Employee
Retirement Income Security Act of 1974, as amended, or the rules and regulations
under either such statute. No termination or amendment of the Plan may, without
the consent of the Optionee to whom any Option shall theretofore have been
granted, adversely affect the rights of that Optionee under that Option.
 
                                       F-5
<PAGE>   166
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     Section 145 of the Delaware General Corporation Law (the "DGCL") empowers a
Delaware corporation to indemnify any person who was or is, or is threatened to
be made, a party to any threatened, pending or completed action, suit or
proceeding, whether civil, criminal, administrative or investigative (other than
an action by or in the right of such corporation) by reason of the fact that
such person is or was a director, officer, employee or agent of such
corporation, or is or was serving at the request of such corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise, provided that such person acted in good
faith and in a manner that such person reasonably believed to be in or not
opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, such person had no reasonable cause to believe
his conduct was unlawful. The indemnity may include expenses (including
attorneys' fees), judgments, fines and amounts paid in settlement actually and
reasonably incurred by such person in connection with such action, suit or
proceeding. A Delaware corporation may also indemnify such persons against
expenses (including attorneys' fees) in actions brought by or in the right of
the corporation to procure a judgment in its favor, subject to the same
conditions set forth in the immediately preceding sentences, except that no
indemnification is permitted in respect of any claim, issue or matter as to
which such person shall have been adjudged to be liable to the corporation
unless and to the extent the Court of Chancery of the State of Delaware or the
court in which such action or suit was brought shall determine upon application
that, in view of all the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expenses as the Court of Chancery or
other such court shall deem proper. To the extent such person has been
successful on the merits or otherwise in defense of any action referred to
above, or in defense of any claim, issue or matter therein, the corporation must
indemnify such person against expenses (including attorneys' fees) actually and
reasonably incurred by such person in connection therewith. The indemnification
and advancement of expenses provided for in, or granted pursuant to, Section 145
is not exclusive of any other rights to which those seeking indemnification or
advancement of expenses may be entitled under any by-law, agreement, vote of
stockholders or disinterested directors or otherwise.
 
     Section 145 of the DGCL also provides that a corporation may maintain
insurance against liabilities for which indemnification is not expressly
provided by the statute. The Registrant is insured against liabilities which it
may incur by reason of its indemnification obligations under its Certificate of
Incorporation, Bylaws and indemnification agreements.
 
     Article X of the Registrant's Certificate of Incorporation provides that
the Registrant will indemnify, defend and hold harmless directors, officers,
employees and agents of the Registrant to the fullest extent currently permitted
under the DGCL.
 
     In addition, Article X of the Registrant's Certificate of Incorporation,
provides that neither the Registrant nor its stockholders may recover monetary
damages from the Registrant's directors for a breach of their fiduciary duty in
the performance of their duties as directors of the Registrant, unless such
breach relates to (i) the director's duty of loyalty, (ii) acts or omissions not
in good faith or which involve intentional misconduct or a knowing violation of
law, (iii) unlawful payments of dividends or unlawful stock repurchases or
redemptions as provided in Section 174 of the DGCL or (iv) any transactions for
which the director derived an improper personal benefit. The By-Laws of the
Registrant provide for indemnification of the Registrant's directors, officers,
employees and agents on the terms permitted under Section 145 of the DGCL
described above.
 
     The Registrant has entered into indemnification agreements with certain of
its directors and executive officers. These agreements provide rights of
indemnification to the full extent allowed and provided for by Section 145 of
the DGCL and the Certificate of Incorporation and Bylaws of Chemex.
 
                                      II-1
<PAGE>   167
 
ITEM 21. EXHIBITS
 
a. Financial Statements and Exhibits.
 
     1. FINANCIAL STATEMENTS.  The following financial statements are submitted
        as part of this report with respect to both the Registrant and ACCESS
        Pharmaceuticals, Inc.:
 
        Independent Auditors' Report
 
   
        Balance Sheets -- September 30, 1995 and December 31, 1994 and 1993
    
 
   
        Statements of Operations -- Years Ended December 31, 1994, 1993 and 1992
        and the nine month periods ended September 30, 1995 and September 30,
        1994
    
 
        Statements of Stockholders' Equity -- Years Ended December 31, 1994,
        1993 and 1992
 
   
        Statements of Cash Flows -- Years Ended December 31, 1994, 1993 and 1992
        and the nine month periods ended September 30, 1995 and September 30,
        1994
    
 
        Notes to Financial Statements
 
     2. FINANCIAL STATEMENT SCHEDULE.  All schedules have been omitted as they
        are not required.
 
     3. EXHIBITS
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER
- ------
<C>          <S>
 +2.0        Agreement of Merger and Plan of Reorganization between the Registrant and ACCESS
             Pharmaceuticals, Inc. (Included as Exhibit A to Proxy Statement/Prospectus)
  3.0        Certificate of Incorporation and Bylaws:
  3.1        Certificate of Incorporation (Incorporated by reference to Exhibit 3(a) of the
             Chemex Form 8-B dated July 12, 1989, Commission File Number 0-9134)
  3.2        Bylaws (Incorporated by referenced to Exhibit 3(b) of the Chemex Form 8-B dated
             July 12, 1989, Commission File Number 0-9314)
 +5.0        Opinion of Bingham, Dana & Gould with respect to the legality of the shares
             being registered including Consent
  8.0        Form of Opinion of Bingham, Dana & Gould regarding tax matters including
             Consent.
 10.0        Material contracts:
*10.1        Employee Stock Ownership Plan (Incorporated by reference to Exhibit 10 of the
             Chemex Form 10-K for the year ended December 31, 1986, Commission File Number
             0-9314)
*10.2        Employee Stock Ownership Trust (Incorporated by reference to Exhibit 10 of the
             Chemex Form 10-K for the year ended December 31, 1986, Commission File Number
             0-9314)
*10.3 (a)    Employment Agreement of Mr. Herbert H. McDade, Jr. (Incorporated by reference to
             Exhibit 10 of the Chemex Form 10-K for the year ended December 31, 1988,
             Commission File Number 0-9314)
*10.3 (b)    First Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated July
             31, 1989 (Incorporated by reference to Exhibit 10.5(b) of the Chemex Form S-I
             dated November 7, 1989, Commission File Number 33-306S5)
*10.3 (c)    Second Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated
             December 13, 1989 (Incorporated by reference to Exhibit 10.3(a) of the Chemex
             Form 10-K for the year ended December 31, 1990)
*10.3 (d)    Third Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated July
             11, 1990 (Incorporated by reference to Exhibit 10.3(a) of the Chemex Form 10-K
             for the year ended December 31, 1990)
</TABLE>
    
 
                                      II-2
<PAGE>   168
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER
- ------
<C>          <S>
*10.3 (e)    Fourth Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated
             June 25, 1991 (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K
             for the year ended December 31, 1991)
*10.3 (f)    Fifth Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated
             December 31, 1991 (Incorporated by reference to Exhibit 10.6 of the Chemex Form
             10-Q for the quarter ended June 30, 1994)
*10.3 (g)    Sixth Amendment to Employment Agreement of Mr. Herbert H. McDade, Jr. dated
             April 29, 1994 (Incorporated by reference to Exhibit 10.6 of the Chemex Form
             10-Q for the quarter ended June 30, 1994)
*10.4        Consultants Agreement with Dr. Charles G. Smith for scientific and business
             advice dated October 4. 1991 (Incorporated by reference to Exhibit 10 of the
             Chemex Form 10-K for the year ended December 31,1991)
 10.5        Joint Venture and General Partnership Agreement between Block Drug Company and
             Chemex Pharmaceuticals, Inc., dated June 20, 1990, (Incorporated by reference to
             Exhibit 28.1 of the Chemex Form 5-3 dated August 5, 1991, Commission File Number
             33-42052)
 10.6        Products Development Agreement between Block/Chemex, G.P. and Chemex
             Pharmaceuticals, Inc. dated June 20, 1991, (incorporated by reference to Exhibit
             28.2 of the Chemex Form S-3 dated August 5, 1991, Commission File Number
             33-42052)
 10.7        Patent Purchase Agreement between Block Drug Company, Inc. and Chemex
             Pharmaceuticals, Inc. dated June 20, 1992, (Incorporated by reference to Exhibit
             28.2 of the Chemex Form S-3 dated August 5 1991, Commission File Number
             33-42052)
 10.8        Irrevocable Assignment of Proprietary Information with Dr. Charles G. Smith
             (Incorporated by reference to Exhibit 10.6 of the Chemex Form 10-K for the year
             ended December 31, 1991)
 10.9        Lease Agreement with DAL Associates dated August 31, 1991 (Incorporated by
             reference to Exhibit 10.13 of the Chemex Form 10-K for the year ended December
             31, 1991)
*10.10       Option Agreement with Mr. Vernon Taylor III dated September 25, 1990
             (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K for the year
             ended December 31, 1990)
 10.11       Loan and Security Agreement with Sentinel Charitable Remainder Trust dated May
             18, 1990 (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K for
             the year ended December 31, 1990)
 10.12       Conversion Agreement with Sentinel Charitable Remainder Trust dated June 18,
             1990 (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K for the
             year ended December 31, 1990)
 10.13       Advisory Agreement with D. Blech & Company, Inc. dated November 8, 1990
             (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K for the year
             ended December 31, 1990)
 10.14       Asset Purchase Agreement with Block Drug Company dated June 29, 1990
             (Incorporated by reference to Exhibit 10 of the Chemex Form 10-K for the year
             ended December 31, 1990)
 10.15       Assignment by Block Drug to Joint Venture of Block/Penederm, Inc. Agreement
             dated March 24, 1993 (Incorporated by reference to Exhibit 10 of the Chemex Form
             10-K for the year ended December 31,1993)
 10.16       Sale of 10% interest in the Block/Chemex Joint Venture by Chemex
             Pharmaceuticals, Inc. to the Block Drug Company, Inc. (Incorporated by reference
             to Exhibit 6 of the Chemex Form 10-Q for the quarter ended June 30, 1994)
</TABLE>
 
                                      II-3
<PAGE>   169
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER
- ------
<C>          <S>
 10.17       Asset Distribution Agreement among Block Drug Company, Inc., Chemex
             Pharmaceuticals, Inc. and Block/Chemex, G.P. dated December 31, 1994
             (Incorporated by reference to Exhibit 10.22 of the Chemex Form 10-Q for the
             quarter ended March 31, 1995)
 10.18       Assignment Agreement -- Amlexanox, dated December 31, 1994 by and among
             Block/Chemex, G.P., Chemex Pharmaceuticals, Inc. and Block Drug Company, Inc.
             (incorporated by reference to Exhibit 10.23 of the Chemex Form 10-Q for the
             quarter ended March 31, 1995)
 10.19       Takeda Chemical Industries, Ltd. Consent and Agreement, dated March 17, 1995
             (Incorporated by reference to Exhibit 10.24 of the Chemex Form 10-Q for the
             quarter ended March 31, 1995)
 10.20       Assignment Agreement -- Penederm Agreements dated December 31, 1994
             (Incorporated by reference to Exhibit 10.25 of the Chemex Form 10-Q for the
             quarter ended March 31, 1995)
 10.21       Letter dated March 17, 1995 from Block Drug Company, Inc. to Chemex as to Chemex
             option to assign Chemex share of Amlexanox ownership to Block for non-refundable
             upfront royalty payment and future royalties (Incorporated by reference to
             Exhibit 10.26 of the Chemex Form 10-Q for the quarter ended March 31, 1995)
 10.22       Agreement between Block and Chemex regarding the purchase of bulk Amlexanox from
             Takeda dated May 4, 1995 (Incorporated by reference to Exhibit 10.27 of the
             Chemex Form 10-Q for the quarter ended June 30, 1995)
 10.23       Asset Purchase and Royalty Agreement between Block and Chemex dated June 7, 1995
             (Incorporated by reference to Exhibit 10.24 of the Chemex Form 10-Q for the
             quarter ended June 30, 1995)
 23.0        Consents of experts and counsel:
 23.1        Consent of KPMG Peat Marwick LLP, independent auditors
 23.2        Consent of Smith, Anglin & Co., independent auditors
 23.3        Consent of Advisory Capital Partners
 23.4        Consent of Bingham, Dana & Gould, counsel to the Registrant (included in Exhibit
             5)
 23.5        Consent of Bingham, Dana & Gould, counsel to Registrant regarding opinion on tax
             matters (included in Exhibit 8)
 24          Power of Attorney (included on signature page)
+99          Form of Proxy Cards.
</TABLE>
    
 
- ---------------
* Management contract or compensatory plan required to be filed as an Exhibit to
  this Form pursuant to Item 14(c) of this report
 
   
+ Previously filed.
    
 
ITEM 22. UNDERTAKINGS
 
     The undersigned registrant hereby undertakes:
 
          (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 (the "Securities Act");
 
             (ii) To reflect in the prospectus any facts or events arising after
        the effective date of the 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 the registration statement;
 
                                      II-4
<PAGE>   170
 
             (iii) To include any material information with respect to the plan
        of distribution not previously disclosed in the registration statement
        or any material change to such information in the registration
        statement.
 
         (2) That, for the purpose of determining any liability under the
  Securities Act, each such post-effective amendment 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.
 
          (3) 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.
 
          (4) That, for purposes of determining any liability under the
     Securities Act, each filing of the registrant's annual report pursuant to
     section 13(a) or section 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 bona fide offering thereof.
 
          (5) That prior to any public reoffering of the securities registered
     hereunder through use of a prospectus which is a part of this registration
     statement, by any person or party who is deemed to be an underwriter within
     the meaning of Rule 145(c), the issuer undertakes that such reoffering
     prospectus will contain the information called for by the applicable
     registration form with respect to reofferings by persons who may be deemed
     underwriters, in addition to the information called for by the other items
     of the applicable form.
 
          (6) That every prospectus (i) that is filed pursuant to paragraph (5)
     immediately preceding, or (ii) that purports to meet the requirements of
     section 10(a)(3) of the Securities Act and is used in connection with an
     offering of securities subject to Rule 415, will be filed as a part of an
     amendment to the registration statement and will not be used until such
     amendment is effective, and that, for purposes of determining any liability
     under the Securities Act, each such post-effective amendment 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.
 
          (7) 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 foregoing provisions, 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 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 whether such indemnification by it is
     against public policy as expressed in the Securities Act and will be
     governed by the final adjudication of such issue.
 
          (8) To respond to requests for information that is incorporated by
     reference into the prospectus pursuant to Items 4, 10(b), 11, or 13 of this
     Form, within one business day of receipt of such request, and to send the
     incorporated documents by first class mail or other equally prompt means.
     This includes information contained in documents filed subsequent to the
     effective date of the registration statement through the date of responding
     to the request.
 
          (9) To supply by means of a post-effective amendment all information
     concerning a transaction, and the company being acquired involved therein,
     that was not the subject of and included in the registration statement when
     it became effective.
 
                                      II-5
<PAGE>   171
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Tarrytown, State of New
York, on December 14, 1995.
    
 
                                          CHEMEX PHARMACEUTICALS, INC.
 
                                          By: /s/  Herbert H. McDade, Jr.
 
                                            ------------------------------------
                                            Name: Herbert H. McDade, Jr.
                                            Title: Chairman of the Board, Chief
                                                Executive Officer, President
                                                and Treasurer
 
                        POWER OF ATTORNEY AND SIGNATURES
 
     Each person whose signature appears below constitutes and appoints Herbert
H. McDade, Jr., his true and lawful attorney-in-fact and agent, with full power
of substitution and resubstitution in or him and in his name, place and stead,
and in any and all capacities, to sign any and all amendments (including
post-effective amendments) to this Registration Statement on Form S-4 of Chemex
Pharmaceuticals, Inc., and to file the same, with all exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorney-in-fact and agent, full power and authority to do
and perform each and every act and thing necessary or desirable to be done in
and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent or any of his substitutes may lawfully do or cause to
be done by virtue hereof.
 
   
     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on December 14, 1995.
    
 
   
<TABLE>
<CAPTION>
                    SIGNATURE                                            TITLE
- --------------------------------------------------        -----------------------------------
<C>                                                       <S>
           /s/  HERBERT H. MCDADE, JR.                    Chairman of the Board Chief
- --------------------------------------------------        Executive Officer, President and
              Herbert H. McDade, Jr.                      Treasurer
                        *                                 Director
- --------------------------------------------------
                Vernon Taylor III
                        *                                 Director
- --------------------------------------------------
                 J. Michael Flinn
                        *                                 Director
- --------------------------------------------------
                 Charles G. Smith
</TABLE>
    
 
                                      II-6
<PAGE>   172
 
   
<TABLE>
<CAPTION>
                    SIGNATURE                                            TITLE
- --------------------------------------------------        -----------------------------------
<C>                                                       <S>
                        *                                 Director
- --------------------------------------------------
              Elizabeth M. Greetham
                        *                                 Director
- --------------------------------------------------
                 Paul P. Woolard
                        *                                 Director
- --------------------------------------------------
                 Sanford D. Smith

     *By:  /s/  Herbert H. McDade, Jr.
         -----------------------------------------
              Herbert H. McDade, Jr.
                 Attorney-in-Fact
</TABLE>
    
 
                                      II-7
<PAGE>   173
 
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
EXHIBIT NO.                                  DESCRIPTION                                 PAGE NO.
- -----------   -------------------------------------------------------------------------  --------
<C>           <S>                                                                        <C>
     8.0      Form of Opinion of Bingham, Dana & Gould with respect to tax matters
              including Consent........................................................     11-9
    23.1      Consent of KPMG Peat Marwick LLP, independent auditors...................    11-11
    23.2      Consent of Smith, Anglin & Co., independent auditors.....................    11-12
    23.3      Consent of Advisory Capital Partners.....................................    11-13
    23.4      Consent of Bingham, Dana & Gould, counsel to the Registrant (included in
              Exhibit 5)...............................................................        -
    23.5      Consent of Bingham, Dana & Gould, counsel to the Registrant regarding tax
              matters (included in Exhibit 8)..........................................        -
</TABLE>
    

<PAGE>   1
Exhibit 8                                                       
- ---------

                                Form of Opinion
                             Bingham, Dana & Gould
                               150 Federal Street
                          Boston, Massachusetts 02110


                                          , 199


Chemex Pharmaceuticals, Inc.
One Executive Drive
Fort Lee, New Jersey 07024


Ladies and Gentlemen:

        This opinion is furnished to you pursuant to Section 6.17 of the
Agreement of Merger and Plan of Reorganization (the "Merger Agreement"), dated
as of October 3, 1995, as amended and restated as of October 31, 1995, between
Chemex Pharmaceuticals, Inc., a Delaware corporation ("Chemex"), and ACCESS
Pharmaceuticals, Inc., a Texas corporation ("ACCESS").  The Merger Agreement
provides for the merger (the "Merger") of ACCESS with and into Chemex.  Except
as specifically provided below, all capitalized terms not otherwise defined
herein have the meanings ascribed to them in the Merger Agreement.

        We have acted as special tax counsel for Chemex in connection with, and
in such capacity are familiar with the principal terms of, the proposed 
Merger. In connection with this opinion we have examined and relied upon the 
originals or copies, certified or otherwise identified to us to our 
satisfaction, of the Merger Agreement, the draft Joint Proxy 
Statement/Prospectus (the "Joint Proxy/Prospectus") included in the 
Registration Statement on Form S-4 filed with the Securities and Exchange 
Commission (the "Commission") on November 7, 1995, and as amended by 
Amendment No. 1 filed with the Commission on December 14, 1995 by Chemex in 
connection with the Merger, and related documents, including the Exhibits and 
Schedules to the Merger Agreement (collectively, the "Documents").  In that 
examination, we have assumed the genuineness of all signatures, the 
authenticity and completeness of all documents purporting to be originals 
(whether reviewed by us in original or copy form) and the conformity to the 
originals of all documents purporting to be copies.

        As to certain factual matters, we have relied with your consent upon,
and our opinion is limited by, the representations of the various parties set
forth in the Documents and on certificates delivered to us by each of ACCESS,
Chemex and certain stockholders of ACCESS dated on or about the date hereof, 
copies of which are attached hereto (the "Certificates").  We have assumed 
with your permission, that the Merger constitutes a merger in accordance with 
and under the laws of the State of Texas insofar as the same apply to the 
Merger.  In addition, our opinion assumes that (i) all representations set 
forth in the Documents and in such Certificates are true and correct in all 
material aspects at and as of the date of the Merger, (ii) the Merger 
Agreement is implemented in accordance with its terms and consistent with the 
representation set out in the Documents and Certificates, and (iii) 
stockholders owning in the aggregate no more than 10% of the ACCESS Stock will
demand and perfect appraisal rights under the Texas Business Corporation Act.
Our opinion is limited solely to the specific matters addressed herein and is 
based on the provisions of the federal Internal Revenue Code as now in effect 
(the "Code"), and the regulations, rulings, and interpretations thereof in 
force as of this date.  We assume no obligation to update our opinion to 
reflect any changes in law or in the interpretation thereof that may 
hereafter occur.

<PAGE>   2

Chemex Pharmaceuticals, Inc.
           , 199
Page 2

        On the basis of and subject to the foregoing, we are of the opinion
that for federal income tax purposes, the Merger will constitute a
reorganization under Section 368(a) of the Internal Revenue Code of 1986, as
amended, and that, therefore, no gain or loss will be recognized by Chemex or
ACCESS as a result of the Merger.

        This opinion is being delivered solely to you for your use in
connection with the referenced transaction, and may not be relied upon by any
other person or used for any other purpose.

        We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm under the heading
"Legal Matters" in the Proxy Statement/Prospectus included in the Registration
Statement.

                                                Very truly yours,


                                                
                                                -------------------------
                                                BINGHAM, DANA & GOULD



<PAGE>   1
                                                                    EXHIBIT 23.1


                        INDEPENDENT AUDITORS' CONSENT


The Board of Directors
Chenex Pharmaceuticals, Inc.:


We consent to the use of our report included herein and to the reference to our
firm under the heading "Selected Financial Data of Chemex" and "Experts" in the
prospectus.

Our report dated March 30, 1995 contains an explanatory paragraph that states
that the Company's recurring losses raise substantial doubt about the entity's
ability to continue as a going concern. The financial statements do not include
any adjustments that might result from the outcome of that uncertainty.


/s/ KPMG Peat Marwick LLP
- ------------------------
KPMG Peat Marwick LLP

New York, New York
December 14, 1995



<PAGE>   1
 
                                                                    EXHIBIT 23.2
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To: ACCESS Pharmaceuticals, Inc.:
 
     As independent public accountants, we hereby consent to the use of our
report included in the registration statement.
 
                                          /s/  Smith, Anglin & Co.
                                          ---------------------------------
                                          SMITH, ANGLIN & CO.
 
Dallas, Texas
   
December 13, 1995
    
 
                                        2

<PAGE>   1
 
                                                                    EXHIBIT 23.3
 
                        ADVISORY CAPITAL PARTNERS, INC.
                         176 Federal Street, 5th Floor
                          Boston, Massachusetts 02110
                    Tel: (617) 261-7682  Fax: (617) 261-1529
 
   
                                                    December 14, 1995
    
 
Chemex Pharmaceuticals, Inc.
One Executive Drive
Fort Lee, New Jersey 07024
 
Attention: Herbert H. McDade, Jr.
          Chairman of the Board and Chief Executive Officer
 
                                  Re: CONSENT
 
     We consent to the inclusion in this Registration Statement on Form S-4 of
Chemex Pharmaceuticals, Inc. of our opinion addressed to the Board of Directors
of Chemex Pharmaceuticals, Inc. We also consent to the description of and
reference to our firm and such opinion under the caption "Opinion of Financial
Advisor."
 
                                          Sincerely yours,
 
                                          ADVISORY CAPITAL PARTNERS, INC.
 
                                          By: /s/  FRANK W. HAYDU III
 
                                            ------------------------------------
                                            Frank W. Haydu III
                                            Managing Director
 
                                        3


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