SHAMAN PHARMACEUTICALS INC
S-1, 1999-05-07
PHARMACEUTICAL PREPARATIONS
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     As Filed with the Securities and Exchange Commission on May 7 , 1999
                                                     Registration No. 333-______

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                 ---------------

                                    FORM S-1
                                 ---------------
                             REGISTRATION STATEMENT

                                      Under
                           THE SECURITIES ACT OF 1933
                                 ---------------
                          SHAMAN PHARMACEUTICALS, INC.
             (Exact name of registrant as specified in its charter)

               Delaware                              94-3095806
   (State or other jurisdiction of                (I.R.S. Employer
    Incorporation or organization)             Identification Number)

                              213 East Grand Avenue
                   South San Francisco, California 94080-4812
                                 (650) 952-7070
    (Address, including zip code, and telephone number, including area code,
                of the Registrant's principal executive offices)

                                  LISA A. CONTE
                      President and Chief Executive Officer
                          Shaman Pharmaceuticals, Inc.
                              213 East Grand Avenue
                   South San Francisco, California 94080-4812
                                 (650) 952-7070
            (Name, address, including zip code, and telephone number,
              including area code, of agent for service of process)

                                   Copies to:
                                Donald C. Reinke
                                Bruce P. Johnson
                            Bay Venture Counsel, LLP
                        1999 Harrison Street, Suite 1300
                            Oakland, California 94612
                                  510-273-8750

        Approximate date of commencement of proposed sale to the public: As soon
  as practicable after this Registration Statement becomes effective.
                                ---------------

     If any of the Securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]


<TABLE>
<CAPTION>
                         CALCULATION OF REGISTRATION FEE

====================================================================================================================================
                                                                                              Proposed     Proposed
                                                                                               Maximum       Maximum
                                                                                 Amount       Offering     Aggregate     Amount of
Title of Each Class of                                                           to be        Price Per     Offering   Registration
Securities to be Registered                                                   Registered(1)    Share         Price          Fee
- ------------------------------------------------------------------------------------------------------------------------------------
<S>     <C>    <C>    <C>    <C>    <C>    <C>
Series R Convertible Preferred Stock, $.001 par value......................    7,500,000       $2.00      $15,000,000      $4,170
====================================================================================================================================
Rights to purchase Series R Preferred Stock, $.001 par value...............    7,500,000          $0               $0          $0
====================================================================================================================================
Common Stock, $.001 par  value (2) ........................................   50,000,000          --               --          --
====================================================================================================================================

</TABLE>

(1) Represents (i) the maximum number of shares of Series R Convertible
Preferred Stock being sold pursuant to this offering, and (ii) an estimated
number of additional shares of common stock as may from time to time become
issuable upon conversion of such preferred stock or by reason of stock
splits, stock dividends and other similar transactions.

(2) The number of shares of common stock to be registered is estimated using
the conversion price of $0.30 per share, which was 10% of the average
closing price of the common stock reported on the OTC Bulletin Board for the
ten (10) trading days from April 19, 1999 to April 30, 1999. The number of
shares of common stock and the conversion price reflect a 1-for-20 reverse
stock split of the common stock anticipated to be effected in June 1999.
                                ---------------
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>


               Subject to Completion, Dated ________________, 1999

        7,500,000 Rights to Purchase Series R Convertible Preferred Stock

            7,500,000 Shares of Series R Convertible Preferred Stock

                          SHAMAN PHARMACEUTICALS, INC.

We are offering to sell up to 7,500,000 shares of our Series R Convertible
Preferred Stock to all persons who were owners of our common stock on
_____________, 1999, and an indeterminate number of shares of our common stock
as may be issuable upon conversion of the Series R Convertible Preferred Stock
or as a result of stock splits, stock dividends and other similar transactions.
This offering is not being underwritten.

Each share of Series R Preferred Stock will automatically convert on
February 1, 2000 into shares of common stock at a conversion price equal to the
lesser of $_____ per share (which is equal to 10% of the average closing sales
price of our common stock as reported on the OTC Bulletin Board for the 10
trading days ending three trading days prior to the date of this prospectus), or
the per share price that is equal to 10% of the average closing sales price of
our common stock for the 10 trading days ending three trading days prior to
February 1, 2000. The Series R Preferred Stock will be entitled to receive
dividends only to the extent that our common stock is entitled to receive
dividends. In the event of liquidation, dissolution or winding up of Shaman, the
holders of the Series R Preferred Stock are entitled to receive, in preference
to the holders of the common stock but after payment of the liquidation
preferences of any outstanding shares of Series A Preferred Stock, Series C
Preferred Stock, and Series D Preferred Stock, an amount equal to $2.00 per
share. Each share of Series R Preferred Stock will have the right to vote on all
matters submitted or required to be submitted to the vote of the stockholders
and shall have 10 votes per share.

If you owned common stock on ______________, 1999, the record date for this
offering, you will receive, at no cost, a right to buy ___ shares of Series R
Convertible Preferred Stock at a price of $2.00 per share for each share of
common stock that you owned on this record date. This right is called the basic
subscription privilege. If you decide to elect to purchase all of the shares
that you are eligible to purchase, you may also request to buy additional shares
of Series R Convertible Preferred Stock at the same price as the basic
subscription privilege. This right is called the over-subscription privilege. We
will not issue rights for fractional shares of Series R Preferred Stock and we
will not issue cash in lieu of fractional rights. You must purchase a minimum of
50 shares of Series R Preferred Stock to participate, and if you hold fewer than
___ shares of common stock on the record date, you will be allowed to purchase
50 shares of Series R Preferred Stock, which will be considered your basic
subscription privilege.

The right to purchase these shares is exercisable beginning on the date of
this prospectus and continuing until 5:00 p.m. Eastern Daylight Savings Time on
July ___, 1999. If you wish to participate in this offering, we recommend that
you follow the instructions set forth in this document and that you submit all
subscription documents to the subscription agent at least 10 days before the
deadline. All subscriptions will be held in escrow by our subscription agent,
BankBoston, N.A., until accepted by Shaman. We reserve the right to cancel or
extend the subscription rights offering at any time before the expiration date.

     There is no minimum number of shares that we must sell in order to complete
the rights offering. Stockholders that do not participate in the rights offering
will continue to own the same number and type of shares currently held, but will
own a smaller percentage of the total number of shares outstanding. The exact
amount of this share dilution will depend on the number of shares of Series R
Preferred Stock sold in the offering. Your subscription rights are not
transferable and will not be listed for trading on any stock exchange. Our
common stock is traded on the Over-the-Counter Electronic Bulletin Board under
the symbol "SHMN." On April 30, 1999, the last sale price for the common stock
as quoted on the OTC Bulletin Board was $0.14 per share. We have applied for
approval for quotation of the Series R Preferred Stock on the OTC Bulletin Board
under the symbol "SHMNO," and expect that these preferred shares will trade
prior to their conversion to common stock on February 1, 2000.


                                 --------------
You should carefully consider the risk factors beginning on page 9 before
purchasing any of the Series R Convertible Preferred Stock.
                                ---------------

Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.


           The Date of this prospectus is _____________________, 1999

The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective and all consents have been
obtained from the relevant state securities commissions. We are not offering to
sell these securities and we are not soliciting an offer to buy these securities
in any state where the offer or sale is not permitted.




                                       1
<PAGE>







                      [This Page Intentionally Left Blank]





                                       2
<PAGE>





                               PROSPECTUS SUMMARY

     This summary highlights information contained elsewhere in this prospectus.
You should read the entire prospectus, including "Risk Factors" and the
financial statements, carefully before making an investment decision.

      All information  contained in this prospectus  reflects a 1-for-20 reverse
stock split of the common stock effected on June ___, 1999.



                                   Our Company

Our Business, Strategy and Products

     We are focused on the discovery, development, and marketing of novel,
proprietary botanical dietary supplements derived from tropical plant
sources. We intend to develop and commercialize our Shaman-branded products
through our recently established division, ShamanBotanicals.com. We also have
available for out-licensing a pipeline of novel pharmaceutical products for
major human diseases developed by isolating active compounds from tropical
plants with a history of medicinal use.

     In 1997, the U.S.  dietary  supplement  market was $12.9 billion,  of which
over $4.0 billion was comprised of herbal or botanical dietary supplements. In
1998, this number was projected to reach $5.0 billion, with a compounded yearly
growth rate of 15% to 25%. In 1997, 24% of people within U.S. households
reported using botanical dietary supplements. The growth of this market has been
led by consumers who are interested in complementary, non-pharmaceutical options
for treating symptoms, fulfilling unmet dietary needs, and optimizing health,
either as an alternative to, or in conjunction with, more conventional medical
approaches. We believe that the use of these products will continue to expand
based upon the aging of the U.S. population, increasing scientific evidence and
acceptance by the conventional medical establishment, and the recent entrance of
powerful consumer companies which provide greater product confidence, while
broadening the base of consumer users.

     The unique positioning of our botanicals business stems from our
significant financial investment, our prior pharmaceutical product candidates,
more than 10 years of extensive field research by our teams of ethnobotanists
and physicians, and pharmaceutical-level chemical standardization, and
biological and clinical testing. We are applying this methodology to our new
industry, and we intend to set a new standard in this industry. In the last
decade, we have amassed a large body of information on the health benefits of
thousands of tropical plant species that have a history of human use and have
organized this information into an extensive relational database. This database
includes information on over 2,600 tropical plants, many of which have not been
introduced or fully developed in the U.S. dietary supplement market. We have
identified plants with a documented ethnomedical history of use in our library
and database of botanicals for use in key market categories with significant
commercial potential. Because many of these plants reflect the previously
untapped plant diversity of the rain forests, many represent novel botanical
products that have the opportunity to attain a strong, proprietary market
position. We currently have a fully-developed product, SB-300, and we expect to
commercialize this product in the near future by applying the funds raised in
this rights offering and raised through partnering development agreements we are
working to put in place.

     We have the opportunity to differentiate our product candidates in
consumers' minds relative to those of our competitors. Key points of
differentiation include:


        - Novel plants/products for unmet needs;
        - Documented, first-hand field experience with traditional use;
        - Rainforest-based plants and products (most products currently
          come from plants found in temperate areas);
        - Our commitment to conservation and reciprocity;
        - Sustainable sourcing and supply;
        - Quality manufactured, standardized products; and
        - Clinically-tested products.

     We have identified multiple areas of dietary supplement product interest
and have identified specific priority product candidates. Some of these proposed
product areas include gastrointestinal relief, energy boosters, sexual function
aids, antioxidants, sleeping aids, calming agents and weight management. We have
developed two product lines, the Croton line and the EthnoEssentials line, with
products to address these areas.




                                       3
<PAGE>



     Our marketing strategy for dietary supplements involves a step-wise product
introduction and distribution approach. First, we plan to launch our first
product, SB-300. This product prevents fluid loss and promotes normal bowel
function. We intend to market the product to the HIV/AIDS Community for people
with chronic diarrhea. We will target this market through the Internet, on our
web site, ShamanBotanicals.com, and through direct response marketing. We may
also market SB-300 to the acute watery diarrhea or traveler's diarrhea markets,
again through the Internet, possibly in conjunction with an Internet site
partner. We also plan to partner and possibly co-brand with first-rate, quality
partners in the three key growth channels of distribution: mass market,
Internet, and multi-level (or network) marketing. Finally, building on the
expected growing recognition of the Shaman brand name (to be built in the future
by product introduction), we plan to broaden our Internet presence both within
the HIV/AIDS niche and beyond to include a full line of Shaman Botanicals, and
will also explore niche retail opportunities.

     The customer base for dietary  supplements in the United States is growing.
In recent consumer surveys conducted by Hartman/New Hope and Nutrition Business
Journal, 25% to 30% of consumers report having used an herbal or botanical
dietary supplement, and 36% report moderate to heavy use of complementary
medicine. We believe that our Botanicals business has two key initial classes of
customers: consumers, primarily in the HIV/AIDS Community and the travelers
market, who could purchase our first product, SB-300, designed to prevent fluid
loss and normalize bowel function; and mass market, Internet and multi-level
companies that may be interested in licensing or partnering with us for the
commercialization of our products.


Our History

     Until December  1998, we were solely focused on developing  pharmaceuticals
products derived from tropical plant sources. Our pharmaceutical business model
was dependent upon our ability to launch our first pharmaceutical product in
1999. As a result of the U.S. Food and Drug Administration response to our
proposed fast-track (single-pivotal trial) New Drug Application package for our
leading pharmaceutical product candidate, SP-303/Provir, and insufficient
resources to continue the costly process of conducting a second pivotal trial,
which would have created significant delays, we restructured our business to
focus operationally on the development and marketing of dietary supplements. As
a result, we now have available for out-licensing our pipeline of novel
pharmaceutical product candidates for major human diseases developed by
isolating active compounds from tropical plants with a history of medicinal use.

     We were incorporated in California in May 1989, began operations in March
1990 and reincorporated in Delaware in January 1993. Our address is 213 East
Grand Avenue, South San Francisco, California, 94080-4812 and our telephone
number is (650) 952-7070. Our web site is located at http://www.shaman.com.
Information contained on our web site does not constitute part of this
prospectus.

     Provir(TM), SP-303(TM), EthnoEssentials(TM), SB-300(TM),
ShamanBotanicals.com(TM), and our stylized logo are trademarks of Shaman. Shaman
Pharmaceuticals(R) is a registered U.S. trademark of Shaman.


                               The Rights Offering

Series R Convertible Preferred
Stock offered by Shaman........  7,500,000 shares at $2.00 per share offered
                                 on a pro-rata "rights offering" basis to
                                 all owners of shares of our common stock on
                                 ___________, 1999.

Preferred Stock outstanding
after the offering... .........  Up to 7,500,000 shares of Series R Convertible
                                 Preferred Stock
                                 400,000 shares of Series A Convertible
                                 Preferred Stock
                                 115,958 shares of Series C Convertible
                                 Preferred Stock
                                 1,898 shares of Series D Convertible
                                 Preferred Stock


Common stock outstanding after
the offering.................... 2,226,852 shares

                                 This number is based on shares outstanding as
                                 of April 30, 1999 and excludes (i) 73,676
                                 shares of common stock subject to outstanding
                                 options under our stock option plans; (ii)
                                 104,833 shares reserved for issuance for
                                 outstanding warrants; (iii) 27,157 shares
                                 reserved for issuance upon the conversion of
                                 Series A Preferred Stock; (iv) an estimate
                                 4,529,609 shares reserved for issuance upon the
                                 conversion of Series C Convertible Preferred
                                 Stock; and (v) an estimated  2,635,432 shares
                                 reserved for issuance upon the conversion of
                                 Series D Convertible Preferred Stock and (vi)
                                 approximately 50,265,111 shares reserved for
                                 issuance upon the conversion of the Series R
                                 Preferred Stock being offered hereby and the
                                 shares of Series R Preferred Stock reserved for
                                 issuance upon exercise of outstanding warrants
                                 (based upon a conversion price of the Series R
                                 Preferred Stock of $0.30).




                                       4
<PAGE>



Use of proceeds................  We intend to use the funds generated by this
                                 rights offering to retire the Senior 
                                 Subordinated Secured Convertible Promissory 
                                 Note of approximately $1.0 million, fund the 
                                 initial commercialization of our first product 
                                 SB-300 (approximately $2.5 million for initial 
                                 launch), pursue development, production and 
                                 marketing of our botanicals products, and for
                                 working capital, including significant current 
                                 liabilities and general purposes.

Description of Series R
Convertible Preferred Stock....  The Series R Preferred Stock will automatically
                                 convert into shares of common stock on February
                                 1, 2000. The conversion price will be equal to
                                 the lower of $_______, which is equal to 10%
                                 of the average closing sales price of our
                                 common stock on the OTC Bulletin Board for the
                                 10 trading days ending three trading days
                                 prior to the date of this prospectus, or a
                                 per share price that is equal to 10% of the
                                 average closing sales price of our common
                                 stock for the 10 trading days ending three
                                 trading days prior to February 1, 2000.  The
                                 following is the formula which will be used to
                                 calculate the conversion of Series R Preferred
                                 Stock:  $2.00 divided by the conversion price
                                 equals the number of shares into which the 
                                 Series R Preferred Stock is convertible.  The 
                                 Series R Preferred Stock will be entitled to
                                 receive dividends only to the extent that out
                                 common stock is entitled to receive dividends.
                                 In the event of liquidation, dissolution or
                                 winding up of Shaman, the holders of the Series
                                 R Preferred Stock are entitled to receive, in  
                                 preference to the holders of the common stock
                                 but after payment of the liquidation
                                 preferences of any outstanding shares of Series
                                 A Preferred Stock, Series C Preferred Stock,
                                 and Series D Preferred Stock, an amount equal
                                 equal to $2.00 per share.  Each share of Series
                                 R Preferred Stock will have the right to vote
                                 on all matters submitted or required to be 
                                 submitted to the vote of the stockholders and
                                 shall have 10 votes per share.

Eligible Stockholders..........  Only persons who owned shares of our common
                                 stock on _________________, 1999 will be
                                 eligible to purchase shares of Series R
                                 Preferred Stock in the rights offering.

Subscription Rights............  If you are an eligible stockholder, you
                                 will have two subscription rights:

                                 (1) Basic subscription privilege. If you held
                                 common stock on  ____________,  1999, then you
                                 will have the right to  purchase ___ shares of
                                 Series R Preferred  Stock at a price of $2.00
                                 per share, for each share of common stock you
                                 owned as of  ____________, 1999.  If you hold
                                 fewer than ____ shares, you will be allowed to
                                 purchase 50 shares of Series R Preferred Stock
                                 to meet the minimum subscription requirement.
                                 See "Basic Subscription Privilege."

                                 (2) Over-subscription privilege. If you elect
                                 to purchase all of the shares that you are
                                 eligible to purchase in your basic subscription
                                 privilege, you may also request to buy
                                 additional shares. In exercising this
                                 over-subscription privilege, you must specify
                                 the maximum number of shares of Series R
                                 Preferred Stock that you are willing to buy at
                                 $2.00 per share.

                                 We will round up to the nearest whole number in
                                 determining the number of shares that we will
                                 issue to each stockholder pursuant to these
                                 rights.



                                       5
<PAGE>

Basic Subscription Privilge....  We require a minimum subscription of 50 shares
                                 of Series R Preferred Stock, or $100.  This
                                 means that if you hold fewer than ___ shares of
                                 common stock on the record date, you will be
                                 allowed to purchase 50 shares of  Series R
                                 Preferred Stock, which will be considered your
                                 basic subscription privilege.

Non-Transferability of
Subscription Rights............  Your basic subscription and over-subscription
                                 rights are not transferable.

Allocation of Shares...........  If we receive subscriptions for more shares
                                 than are being offered, we will allocate shares
                                 first to those stockholders who are exercising
                                 their basic subscription privilege.  We will
                                 then allocate the remaining shares among those
                                 who exercise the over-subscription privilege,
                                 in proportion to the maximum number of shares
                                 that each subscriber offers to purchase above
                                 his basic subscription privilege.

Payment for  Shares............  Payment  for shares may be made by delivery of
                                 cash, money order, wire transfer or, for
                                 certain  stockholders,  cancellation of
                                 existing debt.

How to Subscribe...............  You should carefully complete and sign the
                                 subscription agreement enclosed with this
                                 prospectus and forward it to BankBoston,
                                 N.A., our subscription agent, whose address
                                 appears below.  Be sure to include with
                                 your subscription agreement a check or
                                 money order for the full amount of your
                                 subscription price, including any shares
                                 for which you have over-subscribed, unless
                                 you choose to pay by wire transfer or by
                                 cancellation of debt.  Checks and money
                                 orders will be cashed and held in escrow by
                                 our subscription agent, but will not be
                                 distributed to Shaman until we accept your
                                 subscription in whole or in part.  If your
                                 subscription is accepted in part due to
                                 over-subscription, the subscription agent
                                 will forward to you a check for the
                                 difference. No interest will be paid on the
                                 funds submitted for subscription.

Cancellation of Subscription...  Once you have submitted your subscription
                                 documents, your exercise of subscription
                                 rights may not be revoked.

Delivery of Subscription
Documents......................  Subscription documents should be delivered to:

                                   BankBoston, N.A.
                                   40 Campanelli Drive
                                   Braintree, Massachusetts, 02184

Persons Wishing to Exercise
for the Benefit of Others......  Brokers, banks, trustees and other
                                 individuals or entities that hold common
                                 stock for the benefit of others may, if
                                 authorized by the beneficial owner, complete
                                 the subscription agreement and submit it to the
                                 subscription agent with the proper payment.

Delivery of Certificates for
Series R Convertible Preferred
Stock.........................   Certificates representing shares of Series
                                 R Convertible Preferred Stock will be
                                 delivered to subscribers as soon as practicable
                                 after your basic subscription has been
                                 accepted, which may occur at any time prior to
                                 the expiration of this offering. We may accept
                                 your basic subscription amount prior to
                                 accepting your over-subscription amount. In
                                 that event, we will deliver stock certificates
                                 for the basic subscription amount, and the
                                 subscription agent will retain the over
                                 subscription amount in escrow until the
                                 expiration of this offering. At that time, we
                                 will determine the amount of the
                                 over-subscription to be accepted for each
                                 stockholder, and will issue stock certificates
                                 and refund any balance due to the stockholders.
                                 We expect that this may take two weeks or
                                 longer following our acceptance of your
                                 subscription, due to the need to allow checks
                                 for subscription funds to clear.



                                       6
<PAGE>

Certain Federal Income Tax
Consequences..................   Your receipt or exercise of the
                                 subscription rights should not be treated
                                 as a taxable event for United States
                                 federal income tax purposes, but may have
                                 other tax effects.

Expiration Date of Rights
Offering.....................    July ____, 1999, at 5:00 p.m. Eastern
                                 Daylight Savings Time, unless extended by
                                 Shaman in its sole discretion.


Termination of Offering......    We may cancel this offering at any time. If
                                 we cancel the offering, we will return your
                                 subscription payment without interest.

Proposed OTC Bulletin Board
Trading  symbol for the
Series R Convertible
Preferred Stock.............     SHMNO

Questions Regarding the
Offering....................     If you have any questions about this
                                 offering, including questions about
                                 subscription procedures and requests for
                                 additional copies of this prospectus or other
                                 documents, please contact:

                                 Shareholder Communications Corporation
                                 17 State Street New York,  NY 10004
                                 or by telephone at 1-800-546-8622.




                                       7
<PAGE>


                          Summary Financial Information

      We are providing the following  information  to aid you in the analysis of
the offering.  We derived this information from our audited financial statements
for 1996  through 1998 which are included  elsewhere  in this  prospectus.  This
information  is only a  summary  and you  should  read  it in  conjunction  with
Shaman's  financial  statements (and related notes) and Management's  Discussion
and Analysis of Financial Condition and Results of Operations included elsewhere
in this prospectus and contained in annual reports,  quarterly reports and other
information on file with the Securities and Exchange Commission.

<TABLE>
<CAPTION>


Statement of Operations Data
(in thousands, except per share data)


                                                       Year Ended December 31,
                                                  --------------------------------
                                                    1996         1997        1998
                                                  --------     --------    --------

<S>                                              <C>          <C>         <C>

 Revenue from collaborative agreements            $  3,406     $  3,500    $  2,660

  Operating expenses:
     Research and development                       19,138       24,140      32,393
     General and administrative                      3,537        4,833       5,565
                                                  --------     --------    --------
 Total operating expenses                           22,675       28,973      37,958
                                                  --------     --------    --------
 Loss from operations                              (19,269)     (25,473)    (35,298)
 Interest income (expense), net                        479       (3,815)     (1,483)
                                                  --------     --------    --------
 Net loss                                          (18,790)     (29,288)    (36,781)
 Deemed dividend on Preferred Stock                      -            -      (1,742)
                                                  --------     --------    --------
 Net loss applicable to Common Stockholders       $(18,790)    $(29,288)   $(38,523)
                                                 =========    =========   =========
 Basic and diluted net loss per Common Share      $ (27.85)    $ (34.44)   $ (38.31)
                                                 =========    =========   =========
 Shares used in calculation of basic and
   diluted net loss per Common Share                   675          850       1,006
                                                 =========    =========   =========
</TABLE>

     The  following  table  indicates a summary of our balance sheet at December
31, 1998,  and as adjusted to reflect the sale of  7,500,000  shares of Series R
Convertible  Preferred  Stock after  deducting  estimated  offering  expenses of
$300,000. See "Use of Proceeds" and "Capitalization."

<TABLE>
<CAPTION>
Balance Sheet Data

                                                           At December 31, 1998
                                                           --------------------
                                                           Actual   As Adjusted
                                                          -------   -----------
<S>                                                           <C>        <C>

  Cash, cash equivalents, and short-term investments      $  9,165     $ 23,865
  Working capital                                            1,043       15,743
  Total assets                                              13,139       27,839
  Long-term obligations, including current installments      5,219        5,219
  Accumulated deficit                                     (150,434)    (150,434)
  Total stockholders' equity                                 2,110       16,810

</TABLE>

                                       8
<PAGE>

                              RISK FACTORS

     This offering involves a high degree of risk. You should carefully consider
the risks described below and the other information in this prospectus before
deciding to invest in shares of our Series R Convertible Preferred Stock. The
risks and uncertainties described below may not be the only ones facing Shaman.
Additional risks and uncertainties not presently known to us may also impair our
business. These risk factors supplement and do not supercede the risk factors
contained in our Annual Report on Form 10-K for the year ended December 31, 1998
and any other filings we make with the Securities and Exchange Commission. If
any of the following risks actually occur, our business, operating results and
financial condition and your investment in us could be materially and adversely
affected. In such case, the trading price of our stock, both common and
preferred, could decline and you might lose all or part of your investment.

     This prospectus also contains forward-looking statements that involve
risks and uncertainties. Our actual results could differ materially from those
anticipated in these forward-looking statements as a result of many factors,
including the risks faced by us described below and elsewhere in this
prospectus.

Risks Related to the Rights Offering

You will likely experience immediate and substantial dilution in the book value 
of your investment

      Assuming that the price at which the Series R Preferred Stock will convert
into shares of common stock is $_____ (which is equal to 10% of the average
closing sales price of the common stock for the 10 trading days ending three
trading days prior to the date of this prospectus), each share of Series R
Preferred Stock will convert into __________ shares of common stock. Since the
price of the Series R Preferred Stock is $2.00 per share, this means that the
effective per share price of the common stock to be issued upon conversion will
be $__________. Although this price is less than the current market price of our
common stock, it is substantially higher than the net tangible book value of our
common stock. In the event that the actual conversion price is equal to this
price, purchasers of shares of Series R Preferred Stock (on an as-converted into
common stock basis) in this offering will experience immediate and substantial
dilution of $_______ in the pro forma net tangible book value per share of
common stock. See "Dilution."

The rights offering will significantly reduce the ownership interest of
stockholders who do not participate

     If you do not exercise your subscription rights, your relative ownership
interest in Shaman will be decreased by the issuance of shares of Series R
Preferred Stock to those stockholders who exercise their subscription rights. In
addition, since the effective price of the common stock into which the Series R
Preferred Stock is convertible will be substantially below the market price of
the common stock, the issuance of the common stock upon conversion of the Series
R Preferred Stock, and subsequent sales of this common stock, will likely
depress the market price of the common stock. Any such decrease in the market
price of the common stock will in turn also increase the number of shares of
common stock into which any shares of Series C and Series D Convertible
Preferred Stock that are then outstanding are convertible, causing further
dilution to the holders of our common stock, particularly to those stockholders
who do not participate.

We have not obtained any independent appraisal of Shaman or the value of the
common stock or Series R Preferred Stock

     We intend to obtain  prior to the  effective  date an opinion  from Alliant
Partners that the terms of the rights offering are fair, from a financial
point of view, to our stockholders. Nevertheless, the offering price does not
necessarily bear any relationship to the book value of our assets, past
operations, cash flow, earnings, financial condition or any other established
criteria for value and should not be considered an indication of our underlying
value. Our common stock and the Series R Preferred Stock may trade at prices
below the offering price at any time after the date of this prospectus. This
offering is not being managed by any underwriter or market maker. As a result,
the price of the Series R Convertible Preferred Stock may be subject to
fluctuation and variability and may trade substantially below the initial
offering price.

You will not be able to cancel your subscription prior to the expiration date of
the offering and will be unable to sell your shares until stock certificates are
issued to you

     The public trading market price of the Series R Preferred Stock may
decline before the subscription rights expire. Once you have exercised your
subscription rights, you may not revoke your exercise for any reason. Until
certificates are delivered upon acceptance of your subscription, you will not be
able to sell the shares of Series R Preferred Stock that you purchase in the
rights offering. Delivery of these certificates is subject to delay. We will not
pay you interest on funds delivered to the subscription agent pursuant to the
exercise of your subscription rights. We may terminate the rights offering at
any time. If we elect to withdraw or terminate the rights offering, neither we
nor the subscription agent will have any obligation with respect to the
subscription rights except to return, without interest, any subscription
payments.



                                       9
<PAGE>

Possible loss of net operating losses as a result of a change in control

     The completion of the rights offering may result in a "change of control"
under the provisions of the Internal Revenue Code of 1986 and similar state
provisions. Utilization of our net operating losses and credits may be subject
to a substantial annual limitation due to these "change in ownership"
provisions. The annual limitation may result in the expiration of net operating
losses and credits before utilization, which could subject us to greater tax
liabilities in future periods and adversely affect our financial condition.

We expect to record a significant deemed dividend in connection with the 
issuance of the Series R Preferred Stock

     The conversion price at which the Series R Preferred Stock is convertible
into shares of our common stock will be discounted from the reported trading
price by 90%.  For financial accounting purposes, a portion of the proceeds of 
this offering will be allocated to this "beneficial conversion" feature and
recognized as a deemed dividend to our preferred stockholders over the period
from the date the shares are issued to February 1, 2001.  This deemed dividend 
will increase the net loss applicable to our common stockholders.  We will be
unable to determine the exact amount of the dividend to be recognized until the
date the Series R Preferred Stock is issued.

Risks Associated with our Business

We will need significant additional capital to fund continuing operations

     Shaman needs  substantial  working  capital to fund its  operations.  As of
December 31, 1998, we had cash, cash equivalents and short-term investment
balances of approximately $9.2 million. Our long-term capital requirements will
depend on numerous factors, including among others, the extent and progress of
additional development activities related to the botanicals products, the
success of any marketing efforts related to the botanicals products, the success
of any out-licensing efforts with respect to the pharmaceuticals programs, and
the extent and timing of additional costs associated with patents and other
intellectual property rights. Our projections show that cash on hand will be
sufficient only to fund operations at the current level through the end of the
quarter ended June 30, 1999. Unless we are successful in our efforts to secure
at least $1.0 million under the Senior Secured Convertible Promissory Notes, to
sell or out-license our pharmaceutical products, or to sell or establish
collaborative agreements to sell our botanical products, we will be unable to
fund our current operations beyond quarter ended June 1999. In addition, unless
we are successful in our efforts to raise additional capital through this
offering or other offerings of equity securities, to sell or out-license our
pharmaceutical products, or to sell or establish collaborative agreements to
sell our botanical products, our cash resources will be used to satisfy our
existing liabilities, and we will therefore be unable to fund the operations of
our botanicals business, which may result in significant delays of our planned
activities or the cessation of our operations. Even if we are successful in
these efforts to raise additional funds, such funds may not be adequate to fund
the operations of our botanicals business on a long-term basis.

     In addition, we may need additional capital to fund the redemption of our
Series D Preferred Stock or to pay accumulated dividends. The delisting of our
common stock from The Nasdaq National Market constituted an optional redemption
event for our Series D Preferred Stock. Since we do not have adequate resources
to pay to redeem the Series D Preferred Stock, we have issued a notice to the
holders of the Series D Preferred Stock as required under our charter that
prevented the redemption of the Series D Preferred Stock. Under the terms of our
charter, the effect of preventing this redemption event by issuing the notice
was to increase the annual cumulative dividend payable to the Series D Preferred
Stock holders to $180 per share and to adjust the conversion price of the Series
D Preferred Stock to 72% of the lowest trading price for a designated period
prior to the conversion. The notice preventing the redemption of the Series D
Preferred Stock will remain in effect for as long as our securities are not
listed on any of The Nasdaq National Market, The Nasdaq SmallCap Market, the
American Stock Exchange or the New York Stock Exchange.

     We will need to obtain additional funding through public or private equity
or debt financing, collaborative agreements or from other sources to continue
our research and development activities, fund operating expenses and prepare for
commercialization of products. If we raise additional funds by issuing equity
securities, current stockholders may experience significant dilution. If we
obtain additional funds through collaborative agreements, we may be required to
relinquish rights to certain of our technologies, product candidates, products
or marketing territories that we would otherwise seek to develop or
commercialize ourselves. We may be unable to obtain adequate financing on
acceptable terms when needed. If we are unable to obtain adequate funds, we may
be required to reduce significantly our spending and delay, scale back or
eliminate one or more of our research, development, or commercialization
programs, which would have a material adverse effect on our business, financial
condition and results of operations.

Possible inability to continue as a going concern increases investment risk

     Shaman has suffered  recurring and significant  losses from operations.  It
has also relied upon debt and equity financing to fund these losses and cash
flow deficits. Cash flows from future operations, if any, may not be sufficient
to enable Shaman to continue its current level of operations, or to meet its
debts as they come due. As a result, Shaman may not be able to continue as a
going concern. For the year ended December 31, 1998, our independent auditors
have issued a report which contains explanatory language for the uncertainty
related to the Company's ability to continue as a going concern beyond December
31, 1999. If Shaman is to remain as a going concern, we will need to become and
remain profitable and will also need additional financing. Shaman may not be
successful in obtaining new financing or in achieving profitability. This factor
increases the risk to investors.



                                       10
<PAGE>

We have a history of operating losses, expect continuing losses and may never
achieve profitability

     Shaman has incurred significant operating losses in each year since our
founding in 1989 and expects to continue to incur net losses for the foreseeable
future. We incurred a net loss of approximately $36.8 million for the year ended
December 31, 1998, and as of December 31, 1998, our accumulated deficit was
approximately $150.4 million.

     If we are to become and remain  profitable,  we will need to,  among  other
things, generate product revenues. We have not generated any product sales to
date. We have changed the direction of our operations and are pursuing a new
business model in the botanical dietary supplement industry. Our botanical
dietary supplement products are being prepared for commercial introduction. In
order to generate revenues or profits, we must successfully market these
products or enter into collaborative agreements with others who can successfully
market them. Even if our products are introduced, they may not achieve market
acceptance or we may not achieve profitability.

     Our pharmaceutical product candidates and compounds are still in the
research and development stage and we have ceased all our pharmaceutical
operations. In order to generate revenues from these products, we must
out-license these product candidates. It is possible that our out-licensing
efforts may not be successful, and that we or our licensees may not obtain
required regulatory approvals. Even if our product candidates are developed and
introduced, they may not be successfully marketed or may not achieve market
acceptance or we may not achieve profitability.

The ownership interests of our common stockholders will be substantially reduced
by future issuance of stock upon exercises and conversions of currently
outstanding options, warrants and preferred stock

     We currently have  outstanding  many securities  that are convertible  into
shares of common stock. The holders of common stock will be diluted upon the
exercise of outstanding options and warrants and upon conversion of the Series A
Preferred Stock, the Series C Preferred Stock and the Series D Preferred Stock.
The Series D Preferred Stock is currently convertible into common stock at a
price equal to 72% of the market price of the common stock, and commencing in
August 1999, the Series C Preferred Stock will be convertible at a price equal
to 85% of the market price of the common stock and may be freely resold on the
market. The common stock issued upon conversion of the Series C and Series D
Preferred Stock will substantially dilute the common stock and will likely
depress the price of the common stock if large amounts are offered for sale in
the open market. In addition, there are outstanding warrants to purchase up to
585,844 shares of Series R Preferred Stock. The exercise of these warrants and
the sale of common stock underlying the Series R Preferred Stock will also
dilute the common stock.

We have no experience in the business of botanical dietary supplements and may
not be successful in transitioning into this new business

     We are in the process of transitioning our operations from pharmaceutical
product development to botanical dietary supplement development and
commercialization. We have no experience in this new industry segment and must
create a new business model. Some skills and relationships developed over time
may not be transferable to our new business. While we have been working with
natural products since our inception, we have no prior experience manufacturing
or marketing dietary supplements. We may not be successful in these activities.

     Our botanical products are at various stages of development, ranging from
initial research to final formulation. We will need to conduct additional
research and development to move our product candidates toward
commercialization. Our research and development efforts on potential products
may not lead to development of products that we can successfully commercialize.
In addition, we may not be able to produce our products in commercial quantities
at acceptable costs, or to market and sell our products successfully. Our
products may also prove to have undesirable or unintended side effects that may
prevent or limit their commercial use. Accordingly, we may curtail, redirect,
suspend or eliminate our product development or commercialization at any time.

The failure or loss of third parties on which we rely to manufacture our
products and to perform other services could adversely affect our future
operations and financial results

     We currently produce products only in pilot scale quantities and do not
have the staff or facilities necessary to manufacture products in commercial
quantities. Therefore, we must rely on collaborative partners or third party
manufacturing facilities. We may not be successful in entering into third party


                                       11
<PAGE>

manufacturing arrangements on acceptable terms, if at all. In addition, should
we or our third party manufacturers encounter delays or difficulties in
producing, packaging and distributing our finished products, our clinical trials
and market introduction and subsequent sales of our products could be adversely
affected.

     Contract manufacturers must conform to certain Good Manufacturing
Practices regulations for foods on an ongoing basis. Our dependence on third
parties for the manufacture of our products may adversely affect our ability to
develop and deliver products on a timely and competitive basis. If we are
required to manufacture our own products, we will be required to build or
purchase a manufacturing facility, will be subject to manufacturing requirements
and to similar risks regarding delays or difficulties encountered in
manufacturing any such products, and we will require substantial additional
capital. We may be unable to manufacture any such products successfully or in a
cost-effective manner.

We have only a limited marketing staff and may be unable to launch our products
in the marketplace

     We currently have minimal marketing staff. If we are unable to
successfully establish, execute and finance a complete marketing plan, we may
not achieve a successful product entry into the marketplace. Such failure would
have a material adverse effect on our business, financial condition and results
of operations.

Our success will depend on entering into strategic partnership relationships

     Our ability to develop, commercialize, market and sell our botanical
supplement products will depend on our entering into strategic partner
relationships. We are currently searching for strategic partners for development
and commercialization. Our success in the botanicals market depends in part upon
our ability to attract, retain and motivate key strategic partners in each major
sales and distribution channel. See "Business--Botanicals-Customers and
Partners." We may not be successful in negotiating or entering into such
agreements on terms favorable to us, or at all, and any agreement, if entered
into, may be unsuccessful. We may never derive any significant revenues from any
of our existing or future collaborations.

     We  also   intend  to  seek   collaborative   agreements   to  develop  and
commercialize our pharmaceutical product candidates. We may not be successful in
negotiating  or entering  into such  agreements  on terms  favorable to us or at
all,and any agreement, if entered into, may be unsuccessful.

We may incur costs in connection with the termination of prior research and
development agreement

     The research and development efforts in our discontinued diabetes program
were dependent upon arrangements with Lipha/Merck. We are currently in
negotiations with Lipha/Merck for the discontinuation of their research
agreement. Lipha/Merck will make no further research payments, and may have a
claim against Shaman in connection with the termination of the agreement. We may
never derive any significant revenues from any of our existing or future
collaborations and may incur a loss in connection with the termination of
existing collaborations.

We are subject to intense competition in the botanical dietary supplement
industry

     The dietary supplement business is highly competitive and is characterized
by short product life cycles, significant pressure on pricing and heavy
commitment of marketing resources. Many of our existing competitors are
substantially larger and have greater financial, research and development,
production, marketing, sales and other resources than we do. Such companies
offer a variety of competitive products and services and much broader product
lines. We face actual and potential competition not only from these established
companies, but also from start-up companies developing and marketing new
commercial products. Our failure to successfully compete for customers could
adversely affect our future growth, revenues and profitability.

Risks related to the use of the Internet to sell our products

We have no experience in marketing products over the Internet and may not 
succeed

      We intend to market our first product,  SB-300, directly to consumers
through the Internet on our web site. We have no experience in marketing any
product on the Internet, and we have no market visibility or brand name
awareness on the Internet. Although Internet sites marketing dietary supplements
do exist, the Internet may never develop as a strong or viable marketing and 
distribution channel for dietary supplements. We may not be successful in using 
the Internet as a direct marketing and distribution channel for our products.



                                       12
<PAGE>

The  failure  of  third  party  Internet  access  providers to keep our web site
operational could adversely affect our business

     We will rely entirely or in part on third parties to provide us with access
to the Internet and to enable commerce over our web site, including providing
adequate security of information provided over the web site. Any failure by such
third party providers to provide uninterrupted access by our customers to our
web site and to ensure that commerce can be conducted on our web site could have
a material adverse effect on our business, financial condition and results of
operations.

We will only be able to execute our business plan if Internet usage grows

     The future  success of our first product launch and a portion of our future
business is highly dependent on the adoption of the Internet as a widely-used
medium for commercial activities, including advertising, direct marketing and
other commerce. The Internet market is at a very early stage of development, is
rapidly evolving and is characterized by an increasing number of entrants that
are introducing or developing competing products and services. The Internet has
experienced, and is expected to continue to experience, significant growth in
the number of users and amount of traffic. However, the Internet infrastructure
may not be able to support the demands placed on it by this continued growth. In
addition, the Internet could lose its viability due to delays in the development
or adoption of new standards and protocols to handle increased levels of
Internet activity or due to increased governmental regulation. Moreover,
critical issues concerning the commercial use of the Internet, including
security, reliability, cost, ease of use, accessibility and quality of service,
remain unresolved. Such issues may negatively affect the growth of Internet use
or the attractiveness of commerce and communication on the Internet. Our
business, financial condition and operating results will be materially adversely
affected if critical issues concerning the commercial use of the Internet are
not favorably resolved, the necessary infrastructure is not developed, or the
Internet does not become a viable commercial marketplace.

Failure of the web infrastructure would harm our business

     The  success  of our  first  product  launch  and a portion  of our  future
business will substantially depend, among other things, upon the continued
expansion and maintenance of the web infrastructure as a reliable network
backbone. This requires the necessary speed, capacity and security, and timely
development of enabling products such as high speed modems, for providing
reliable web access and services. We do not know whether the web infrastructure
will continue to be able to support the growing demands placed upon it as the
web continues to grow in terms of the number of users, the frequency of users
and the increased bandwidth requirements. The performance or reliability of the
web could be adversely affected by these demands. In addition, the Internet
could lose its viability due to delays in the development or adoption of new
standards and protocols required to handle increased levels of Internet activity
or due to increased governmental regulation. Changes in, or insufficient
availability of, telecommunications services to support the Internet could also
result in slower response times and adversely affect usage of the web. The web
has experienced a number of outages and other delays due to damage to portions
of its web infrastructure. Any such outages or any other failure of the Internet
infrastructure to effectively support the expected growth could delay the growth
of the Internet and adversely affect our business.

On-line security breaches could harm our business

      A significant  barrier to electronic  commerce and  communications  is the
secure transmission of confidential information over public networks. We plan to
rely on encryption and authentication technology licensed from third parties to
provide the security and authentication necessary to effect secure transmission
of confidential information to and from our web site. It is possible that
advances in computer capabilities, new discoveries or other developments will
result in a compromise or breach of the algorithms that we select for this
purpose. This could have a material adverse effect on our business, results of
operations and financial condition.

      We may be required to expend  significant  capital and other  resources to
protect against the threat of such security breaches or to alleviate problems
caused by such breaches. The public's concern over the security of Internet
transactions and the privacy of users may also inhibit the growth of the web as
a means of conducting commercial transactions. To the extent that our activities
or those of third party contractors involve the storage and transmission of
proprietary information, such as credit card numbers, security breaches could
expose us to a risk of loss or litigation and possible liability. Our security
measures may not be sufficient to prevent security breaches, and the failure to
prevent such security breaches could have a material adverse effect on our
business, results of operations and financial condition.



                                       13
<PAGE>

Legal and regulatory uncertainties regarding the Internet could harm our 
business

      There is an increasing  number of laws and  regulations  pertaining to the
Internet. In addition, a number of legislative and regulatory proposals are
under consideration by federal, state, local and foreign governments and
agencies. Laws or regulations may be adopted with respect to the Internet
relating to liability for information retrieved from or transmitted over the
Internet, online content regulation, user privacy, taxation, pricing and quality
of products and services. The growth and development of the market for online
commerce may prompt more stringent consumer protection laws that may impose
additional burdens on conducting business online. Moreover, the applicability to
the Internet of existing laws governing issues such as intellectual property
ownership and infringement, copyright, trademark, trade secret, obscenity,
libel, employment and personal privacy is uncertain and developing. Any new
legislation or regulation, or the application or interpretation of existing
laws, may decrease the growth in the use of the Internet, increase our cost of
doing business or otherwise have a material adverse effect on our business,
operations and financial condition. In addition, since we expect that our
products will be available over the Internet in multiple states, and as we
expect to have consumers residing in such states, these jurisdictions may claim
that we are required to qualify to do business as a foreign corporation in each
such state. We are currently qualified to do business only in California, and
failure to qualify as an out-of-state or foreign corporation in a jurisdiction
where we are required to do so could subject us to taxes and penalties for the
failure to qualify.

Government regulation

     The manufacturing, processing, formulating, packaging, labeling and
advertising of our botanical dietary supplement products are subject to
regulation in the United States by several federal agencies, including the Food
and Drug Administration, the Federal Trade Commission, the Consumer Product
Safety Commission, the Department of Agriculture and the Environmental
Protection Agency. Our activities are also regulated by various agencies of the
states and localities where we will distribute and sell our products.

     The composition and labeling of dietary supplements is most actively
regulated by the FDA under the provisions of the Federal Food, Drug, and
Cosmetic Act. The FFDC Act has been revised in recent years by the Nutrition
Labeling and Education Act of 1990 and by the Dietary Supplement Health and
Education Act of 1994.

     Our botanical product candidates are generally regulated as dietary
supplements under the 1994 Dietary Supplement Health and Education Act, and are,
therefore, generally not subject to pre-market approval by the FDA. However,
these product candidates are subject to FDA regulation, particularly relating to
adulteration and misbranding. For instance, we are responsible for ensuring that
all dietary ingredients in a supplement are safe, and must notify the FDA in
advance of putting a product containing a new dietary ingredient (i.e., an
ingredient not marketed in the United States before October 15, 1994) on the
market and furnish adequate information to provide reasonable assurance of the
ingredient's safety. Currently, we are only pursuing products that are old
dietary ingredients and are therefore not subject to this procedure. Further, if
we make statements about a supplement's effects on the structure or function of
the body, we must, among other things, substantiate that the statements are
truthful and not misleading. In addition, our product labels must bear proper
ingredient and nutritional labeling and we must manufacture our supplements in
accordance with current Good Manufacturing Practices regulations for foods. A
product can be removed from the market if it is shown to pose a significant or
unreasonable risk of illness or injury. Moreover, if the FDA determines that the
"intended use" of any of the our products is for the diagnosis, cure,
mitigation, treatment or prevention of disease, the product would meet the
definition of a drug and would require pre-market approval of safety and
effectiveness prior to its manufacture and distribution. Our failure to comply
with applicable FDA regulatory requirements may result in, among other things,
injunctions, product withdrawals, recalls, product seizures, fines, and criminal
prosecution.

     In March 1999, new FDA regulations governing the labeling of dietary
supplements took effect. The new rules require that information such as the
complete list of ingredients and levels of vitamins and minerals be included on
product labels. While in our judgment these regulatory changes are generally
favorable to the dietary supplements industry, in the future we may be subject
to additional laws or regulations that could have an adverse effect on the
industry and on our business. In addition, existing laws and regulations may be
repealed and applicable regulatory authorities may interpret them stringently or
unfavorably.

     We cannot predict the nature of future laws, regulations, interpretations
or applications, nor can we determine what effect either additional government
regulations or administrative orders, when and if promulgated, or disparate
federal, state and local regulatory schemes would have on our business in the
future. Any change could materially and adversely affect our results of
operations and financial condition.

     Governmental regulations in foreign countries where we may commence or
expand sales may prevent or delay entry into the market or prevent or delay the
introduction, or require the reformulation, of our products. Compliance with


                                       14
<PAGE>

such foreign governmental regulations is generally the responsibility of our
partners or distributors in those countries, which distributors are independent
contractors over whom we have limited or no control.

Environmental regulation

     In connection with our research and development activities and
manufacturing of materials, we are subject to federal, state and local laws,
rules, regulations and policies governing the use, generation, manufacture,
storage, air emission, effluent discharge, handling and disposal of certain
materials and wastes. Although we believe we comply with these laws and
regulations in all material respects and have not been required to take any
action to correct any noncompliance, we may be required to incur significant
costs to comply with environmental and health and safety regulations in the
future. Our research, development, and manufacturing activities involve the
controlled use of hazardous materials and chemicals. Although we believe that
our safety procedures for handling and disposing of such materials comply with
the standards prescribed by state and federal regulations, we cannot eliminate
the risk of accidental contamination or injury from these materials completely.
In the event of an accident, we could be held liable for any resulting damages.
Although we have secured insurance to mitigate such expense, any such liability
could exceed our insurance coverage and resources. Such liability could have a
material adverse effect on our business, financial condition and results of
operations.

Product liability claims asserted against us in the future could adversely
affect our business

     Our business exposes us to potential product liability risks that are
inherent in the development, testing, manufacture, marketing and sale of
pharmaceutical and dietary supplement products. Product liability insurance for
the pharmaceutical and dietary supplement industries generally is expensive. Our
present product liability insurance coverage, which includes coverage for acts
by third parties, including manufacturers of our product candidates, may not be
adequate. We will also need to increase our insurance coverage as we further
develop our products, and we may be unable to obtain adequate insurance coverage
against all potential claims at a reasonable cost. Some of our development and
manufacturing agreements contain insurance and indemnification provisions
pursuant to which we could be held accountable for certain occurrences. If we
are subject to product liability claims for which we have inadequate insurance
we could suffer a material adverse effect on our business, financial condition
and results of operations.

Negative publicity regarding the safety or quality of our products could
adversely impact our business

     Because we depend on consumers' perception of the safety and quality of
our products as well as similar products distributed by other companies (which
may not adhere to the same quality standards as ours), if our products or a
competitor's similar products were asserted to be harmful to consumers, our
business could be adversely affected by that negative publicity. In addition,
because we depend on perceptions, adverse publicity associated with illness or
other adverse effects resulting from consumers' failure to use our products as
we suggest, other misuse or abuse of our products or any similar products
distributed by other companies could affect the market acceptance of our
products and materially adversely affect our business.

     Furthermore, we believe the recent growth experienced by the nutritional
supplement market is based in part on national media attention regarding recent
scientific research suggesting potential health benefits from regular
consumption of certain dietary supplements and other nutritional products. This
research has been described in major medical journals, magazines, newspapers and
television programs. The scientific research to date is preliminary, and in the
future scientific results and media attention may contain unfavorable or
inconsistent findings that could have a material adverse effect on our business.

Our dependence on raw plant material from Latin and South America, Africa and
Asia makes us particularly susceptible to the risks of interruptions in our
supplies

     We currently import all of the plant materials for our products from
countries in Latin and South America, Africa and Southeast Asia. We are
dependent upon a supply of raw plant material to make our products. We do not
have formal agreements in place with all of our suppliers. Continued source of
plant supply risks include:

     - unexpected changes in regulatory requirements,
     - exchange rates, tariffs and barriers,
     - difficulties in coordinating and managing foreign operations,
     - political instability, and
     - potentially adverse tax consequences.



                                       15
<PAGE>

     Interruptions in supply or material increases in the cost of supply could
have a material adverse effect on our business, financial condition and results
of operations. If the prices of raw materials rise, we may not be able to raise
prices quickly enough to offset the effect of these increased raw material
costs, if at all.

     In addition, tropical rainforests and irreplaceable plant resources found
only in such rainforests are currently threatened with destruction. The
destruction of portions of the rainforests which contain the source material
from which our current or future products are derived could materially and
adversely affect our business, financial condition and results of operations.

The failure to protect our intellectual property rights could adversely impact
our business

     Our success will be substantially dependent on our proprietary technology.
We rely primarily on a combination of patent, copyright and trademark laws,
trade secrets, confidentiality procedures and contractual provisions to protect
our intellectual property. These means of protecting our proprietary rights may
not be adequate. Our trademarks are valuable assets that are very important to
the marketing of our products. Our policy is to pursue registrations for all of
the trademarks associated with our key products. We currently have 20 U.S.
patents issued, 12 U.S. patent applications pending, and one international
application filed. The pending patents may never be approved or issued. Any
issued patents may not provide sufficiently broad protection or may not prove
valid or enforceable in actions against alleged infringers. Others may
independently develop similar products, duplicate any of our products or design
around any of our patents. In addition, many foreign countries may not protect
our products and intellectual property rights to the same extent as the laws of
the United States, and there is considerable variation between countries as to
the level of protection afforded under patents and other proprietary rights.
Such differences may expose Shaman to increased risks of commercialization in
each foreign country in which we may sell products. We also depend on unpatented
trade secrets. All of our employees have entered into confidentiality
agreements. However, others may independently develop substantially equivalent
information and techniques or otherwise gain access to our trade secrets, our
trade secrets may be disclosed or we may be unable to effectively protect our
rights to unpatented trade secrets. To the extent that we or our consultants or
research collaborators use intellectual property owned by others in their work
for us, disputes also may arise as to the rights in related or resulting
know-how and inventions. Litigation may be necessary in the future to enforce
our intellectual property rights, protect our trade secrets or to determine the
validity and scope of the intellectual property rights of others. In the event
of litigation to determine the validity of any third party's claims, we could be
required to expend significant resources and divert the efforts of our technical
and management personnel, whether or not such litigation is determined in our
favor.

     Our success in outlicensing our pharmaceutical assets depends in large
part on our ability to obtain and maintain patents, protect trade secrets and
operate without infringing upon the proprietary rights of others. The patent
position of companies in the pharmaceutical industry generally is highly
uncertain, involves complex legal and factual questions, and has recently been
the subject of much litigation. No consistent policy has emerged from the U.S.
Patent and Trademark Office, or PTO, or the courts regarding the breadth of
claims allowed or the degree of protection afforded under pharmaceutical
patents.

     We are currently in a dispute in Europe regarding a patent for our
proanthocyanidin polymer composition (which covers the active ingredient in
SP-303/Provir). The European Patent Office, the French Patent Office, the German
Patent Office and the Australian Patent Office have each granted a patent
containing broad claims to proanthocyanidin polymer compositions (and methods of
use of such compositions), which are similar to our specific composition, to
Leon Cariel and the Institut des Substances Vegetales. The effective filing date
of these patents is prior to the effective filing date of our foreign pending
patent application in Europe. Certain of the foreign patents have been granted
in jurisdictions where examination is not rigorous. Shaman has instituted an
Opposition in the European Patent Office against granted European Patent No.
472531 owned by Leon Cariel and Institut des Substances Vegetales. We believe
that the granted claims are invalid and intend to vigorously prosecute the
Opposition. In the United States, the Patent and Trademark Office awarded
judgment to Shaman in an Interference regarding a this patent dispute.

     We may be unsuccessful in having the granted European patent revoked or
the claims sufficiently narrowed so that our proanthocyanidin polymer
composition and methods of use are not potentially covered. The holders of the
granted European patent may assert against us claims relating to this patent. If
they are successful, we may not be able to obtain a license to this patent at
all, or at reasonable cost, or be able to develop or obtain alternative
technology to use in Europe or elsewhere. If we cannot obtain licenses to the
patent, we may not be able to introduce or sell our SP-303/Provir product in
Europe. The earlier effective filing date of this patent could limit the scope
of the patents, if any, that we may be able to obtain or result in the denial of
our patent applications in Europe or elsewhere.



                                       16
<PAGE>

We may be subject to infringement claims by third parties

     The pharmaceutical industry and, to a lesser extent, the dietary
supplement industry, is subject to frequent litigation regarding patent and
other intellectual property rights. Leading companies and organizations in these
industries have numerous patents that protect their intellectual property rights
in these areas. Third parties may assert claims against us with respect to our
existing and future products. In the event of litigation to determine the
validity of any third party's claims, we could be required to expend significant
resources and divert the efforts of our technical and management personnel,
whether or not such litigation is determined in our favor. In the event of an
adverse result of any such litigation, among other requirements, we could be
required to develop non-infringing technology or to obtain licenses to the
technology that is the subject of the litigation. We may not be successful in
developing non-infringing technology or in obtaining a license to use the
technology on commercially reasonable terms.

Our executive officers and key personnel are critical to our business
and may not remain with Shaman in the future

     Our success depends in large part upon the continued contributions of our
key senior management. Our future performance also depends on our ability to
attract and retain qualified management and scientific personnel. Competition
for such personnel is intense, and we may be unable to continue to attract,
assimilate or retain other highly qualified technical and management personnel
in the future. The loss of key personnel or the failure to recruit additional
personnel or to develop needed expertise could have a material adverse effect on
our business, financial condition and results of operations.

Potential Year 2000 computer software problems could adversely impact
future operations

     The year 2000 issue is the result of computer programs being written using
two digits rather than four to define the applicable year. Any of our computer
programs or hardware that have date-sensitive software or embedded chips may
recognize a date using "00" as the year 1900 rather than the year 2000. This
could result in a system failure or miscalculations causing disruptions of
operations, including, among other things, a temporary inability to process
transactions or engage in similar normal business activities.

     Based on recent assessments, we have determined that we will be required
to certify portions of our internal operating systems software and certain
hardware so that those systems will properly utilize dates beyond December 31,
1999. We presently believe that with modifications or replacements of existing
software and certain hardware, the year 2000 issue can be mitigated. We believe
that such modification and replacements are not significant, and should such
modification and replacements be delayed there would be no material impact on
our operations. We cannot, however, be certain that we have identified all of
the potential risks to our business that could result from matters related to
the year 2000.

     We are approximately 85% complete with the assessment of all internal
systems that could be significantly affected by the year 2000. After the
assessment phase is completed, we will need to purchase, install and test the
upgrades to ensure they meet internal year 2000 compliance. We expect to
complete our internal year 2000 readiness program in the third quarter of 1999.
We are in the process of asking our significant suppliers and subcontractors
that do not share information systems with us (external agents) whether their
systems are year 2000 compliant. To date, we are not aware of any external agent
with a year 2000 issue that would materially impact our results of operations,
liquidity, or capital resources. However, we have no means of ensuring that
external agents will be year 2000 ready. The inability of external agents to fix
their year 2000 problems in a timely fashion could materially adversely affect
us.

     We currently have no contingency plans in place in the event we do not
complete all phases of our year 2000 program. We plan to evaluate the status of
completion in the second quarter of 1999 and determine whether such a plan is
necessary.

The recent delisting from the Nasdaq National Market may reduce the liquidity
and marketability of our stock and may depress the market price of our stock

     On February 2, 1999, Nasdaq delisted our common stock from The Nasdaq
National Market and moved our stock to the National Association of Securities
Dealers, Inc.'s OTC Bulletin Board. Although our securities are included on the
OTC Bulletin Board, there can be no assurance that a regular trading market for
the securities will be sustained in the future. The OTC Bulletin Board is an


                                       17
<PAGE>

unorganized, inter-dealer, over-the-counter market which provides significantly
less liquidity than The Nasdaq Stock Market, and quotes for stocks included on
the OTC Bulletin Board are not listed in the financial sections of newspapers as
are those for The Nasdaq Stock Market. Therefore, prices for securities traded
solely on the OTC Bulletin Board may be difficult to obtain. The reduced
liquidity of our stock and the reduced public access to quotations for our stock
could depress the market price of our stock.

"Penny Stock" regulations may impose restrictions on marketability of our stock

     The Securities and Exchange Commission has adopted regulations which
generally define "penny stock" to be any equity security that is not traded on a
national securities exchange or Nasdaq and that has a market price of less than
$5.00 per share or an exercise price of less than $5.00 per share, subject to
certain exceptions. Since our securities that are currently included on the OTC
Bulletin Board are trading at less than $5.00 per security at any time, our
stock may become subject to rules that impose additional sales practice
requirements on broker-dealers who sell such securities to persons other than
established customers and accredited investors (generally, such investors have
assets in excess of $1,000,000 or an individual annual income exceeding
$200,000, or, together with the investor's spouse, a joint income of $300,000).
For transactions covered by these rules, the broker-dealer must make a special
suitability determination for the purchase of such securities and have received
the purchaser's written consent to the transaction prior to the purchase.
Additionally, for any transaction involving a penny stock, unless exempt, the
rules require, among other things, the delivery, prior to the transaction, of a
risk disclosure document mandated by the SEC relating to the penny stock market
and the risks associated therewith. The broker-dealer must also disclose the
commission payable to both the broker-dealer and the registered representative,
current quotations for the securities and, if the broker-dealer is the sole
market-maker, the broker-dealer must disclose this fact and the broker-dealer's
presumed control over the market. Finally, monthly statements must be sent
disclosing recent price information for the penny stock held in the account and
information on the limited market in penny stocks. Consequently, the penny stock
rules may restrict the ability of broker-dealers to sell our securities and may
affect the ability of stockholders to sell our securities in the secondary
market.

Our stock price has been and may continue to be highly volatile

     The price of our common stock has been particularly volatile and will
likely continue to fluctuate in the future. Announcements of technological
innovations, regulatory matters or new commercial products by us or our
competitors, developments or disputes concerning patent or proprietary rights,
publicity regarding actual or potential product results relating to products
under development by us or our competitors, regulatory developments in both the
United States and foreign countries, public concern as to the safety of
pharmaceutical or dietary supplement products, and economic and other external
factors, as well as period-to-period fluctuations in financial results, may have
a significant impact on the market price of our common stock. In addition, from
time to time, the stock market experiences significant price and volume
fluctuations that may be unrelated to the operating performance of particular
companies or industries. The market price of our common stock, like the stock
prices of many publicly traded smaller companies, has been and may continue to
be highly volatile.

Anti-takeover Provisions in our Charter Documents and Delaware law may inhibit
potential acquisition bids for Shaman, which may adversely affect the market
price of our common stock and the voting rights of the holders of the common
stock

     Certain provisions of our charter documents and Delaware law make it more
difficult for a third party to acquire, and may discourage a third party from
attempting to acquire, us, even if a change in control would be beneficial to
our stockholders. These provisions could also limit the price that certain
investors might be willing to pay in the future for shares of the common stock.
The provisions include the division of our board of directors into two separate
classes, the ability of the board to elect directors to fill vacancies created
by an expansion of the board, the power of the board to amend our bylaws, and
the requirement that at least 66 2/3% of the outstanding shares are required to
call a special meeting of stockholders. Our board will also have the authority
to issue up to 1,393,715 additional shares of preferred stock and to fix the
price, rights, preferences, privileges and restrictions of those shares without
any further vote or action by the stockholders. The rights of the holders of
common stock will be subject to, and may be adversely affected by, the rights of
the holders of any preferred stock that may be issued in the future. The
issuance of preferred stock with voting rights could make it more difficult for
a third party to acquire a majority of the outstanding voting stock. Certain
provisions of Delaware law applicable to us could also delay or make more
difficult a merger, tender offer or proxy contest involving Shaman, including
Section 203 of the Delaware General Corporation Law, which prohibits a Delaware
corporation from engaging in any business combination with any interested
stockholder for a period of three years unless certain conditions are met.


                                       18
<PAGE>

                       WHERE YOU CAN FIND MORE INFORMATION

     This prospectus is part of a registration statement on Form S-1 we have
filed with the Securities and Exchange Commission. This 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
SEC. For further information regarding Shaman, you may refer to the registration
statement, including its exhibits and schedules. The registration statement may
be inspected at the public reference facilities maintained by the SEC at Room
1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and copies of all or any
part of the registration statement may be obtained from the SEC upon payment of
the prescribed fees.

     We also file annual, quarterly and special reports, proxy statements and
other information with the SEC. You may read and copy any document we file at
the SEC's Public Reference Room at 450 Fifth Street, N.W., Washington, D.C.
20549, and at the SEC's regional offices located at 75 Park Place, New York, New
York 10007, and 500 West Madison Street, Suite 1400, Chicago, Illinois
60661-2511. You may also obtain copies of such material by mail from the SEC's
Public Reference Room at 450 Fifth Street, N.W., Washington, D.C. 20549, at
prescribed rates. Please call the SEC at 1-800-SEC-0330 for further information
on the public reference rooms. You may also examine our SEC filings through the
SEC's web site at http://www.sec.gov.




                                       19
<PAGE>

                                 USE OF PROCEEDS

     We estimate that the net proceeds from the sale of the 7,500,000  shares of
Series R Preferred Stock offered by this prospectus will be $14,700,000, after
deducting estimated offering expenses of $300,000. We intend to use the funds
generated by this offering to retire certain existing debt, pursue development,
production and marketing of products within the botanicals business and for
working capital purposes.

     We intend to use a  approximately  $1 million of the net  proceeds to repay
the Senior Subordinated Secured Convertible Promissory Note. We expect to use
the balance of the net proceeds for the initial commercialization of our first
product, SB-300, currently budgeted at approximately $2.5 million, and for the
development, production, and marketing of our other botanical product
candidates, for working capital, including significant current liabilities and
for general corporate purposes. In the event that less than all of the shares of
Series R Preferred Stock are sold, we will still be required to repay a maximum
of $2 million in outstanding indebtedness under the Senior Subordinated Secured
Convertible Promissory Note. We will therefore have fewer funds available for
the commercialization of SB-300.

     The amounts actually expended for these purposes may vary significantly
depending upon numerous factors, including the amount raised by this offering,
progress of our research and development programs, the status of competitive
products and the availability of alternative financing, including agreements
with other companies relating to the development and marketing of our products
and the other factors described under "Risk Factors." Accordingly, we will
retain broad discretion in the allocation of the net proceeds of this offering.
Pending such uses, the net proceeds of this offering will be invested in United
States government securities, other investment grade debt securities and other
short-term investments. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations -- Liquidity and Capital Resources."




                                       20
<PAGE>


                      PRICE RANGE OF COMMON STOCK


     Since February 2, 1999, Shaman's common stock has been traded on the OTC
Bulletin Board of the National Association of Securities Dealers, Inc. under the
symbol "SHMN." Our common stock was traded on the Nasdaq Stock Market from our
initial public offering on January 26, 1993 until February 1, 1999.

     Set forth below is the range of high and low closing sale prices for
Shaman's common stock for the periods indicated, as reported by the OTC Bulletin
Board or The Nasdaq Stock Market, as applicable, and as adjusted for the
1-for-20 reverse stock split effected on June ___ 1999:


<TABLE>
<CAPTION>
                                                         High           Low
                                                        ------         -----
<S>                                                    <C>             <C>
Fiscal Year 1997
     First Quarter Ended March 31, 1997                $ 125.00       $  77.60
     Second Quarter Ended June 30, 1997                $ 123.80       $  93.80
     Third Quarter Ended September 30, 1997            $ 140.00       $ 102.40
     Fourth Quarter Ended December 31, 1997            $ 141.20       $  85.00

Fiscal Year 1998
     First Quarter Ended March 31, 1998                $ 110.00       $  82.60
     Second Quarter Ended June 30, 1998                $ 100.00       $  88.20
     Third Quarter Ended September 30, 1998            $  80.00       $  63.80
     Fourth Quarter Ended December 31, 1998            $  66.20       $  21.80

Fiscal Year 1999
     First Quarter Ended March 31, 1999                $  40.60       $   3.40
     Second Quarter Ending June 30, 1999
      (through  April 30, 1999)                        $   4.60       $   1.20

</TABLE>


                                 DIVIDEND POLICY

     We have paid no cash dividends on the common stock since the Company's
inception and do not anticipate paying any dividends in the foreseeable future.
The Company's loan agreement with MMC/GATX Partnership No. 1 restricts the
payment of cash dividends on any equity security so long as any amount remains
outstanding under such loan agreement. In addition, Shaman's charter requires
that Shaman pay all required dividends to the holders of Series A Preferred
Stock, Series C Preferred Stock, and Series D Preferred Stock, respectively,
prior to the payment of dividends to the holders of our common stock or Series R
Convertible Preferred Stock. At December 31, 1998, we had an accumulated deficit
of $150.4 million and, until this deficit is eliminated, we will be prohibited
from paying cash dividends except out of net profits.


                                       21
<PAGE>


                                 CAPITALIZATION

     The following table sets forth the actual capitalization of the Company as
of December 31, 1998 and as adjusted to reflect the sale of 7,500,000 shares of
Series R Convertible Preferred Stock offered hereby at the estimated public
offering price of $2.00 per share and after deducting the estimated offering
expenses of $300,000.

<TABLE>
<CAPTION>

                                                                                           December 31, 1998
                                                                          -------------------------------------------------
                                                                          (in thousands except share and per share amounts)


                                                                                     Actual (2)    As Adjusted (1)
                                                                                    ------------  -----------------
<S>                                                                                 <C>           <C>

 Long-term debt and capital lease obligations, including current portion...........   $   5,219        $   5,219

 Stockholders' equity
       Preferred Stock, $.001 par value per share, 1,000,000 shares authorized;
          Series A Preferred Stock, 400,000 shares authorized and designated;
               400,000 shares issued and outstanding, actual and as adjusted.......          --               --
          Series C Preferred Stock, 200,000 shares authorized and designated;
               115,958 issued and outstanding, actual and as adjusted
          Series D Preferred Stock, 6,285 shares authorized and designated;
               3,575 shares issued and outstanding, actual and as adjusted.........          --               --
          Series R Preferred Stock 10,000,000 shares authorized and designated;
               7,500,000 shares issued and outstanding, as adjusted................          --                8
          Common Stock, $.001 par value per share, 40,000,000 shares authorized;
               1,519,147 shares issued and outstanding, actual and as adjusted.....           2                2
       Additional paid-in capital..................................................     152,728          167,420
       Deferred compensation and other adjustments.................................        (186)            (186)
       Accumulated deficit.........................................................    (150,434)        (150,434)    
                                                                                     ----------       ----------
              Total stockholders' equity...........................................       2,110           16,810
                                                                                     ----------       ----------
              Total capitalization.................................................   $   7,329        $  22,029
                                                                                     ==========       ==========
</TABLE>

- ----------

(1)  Adjusted to reflect the sale of 7,500,000 shares of Series R Convertible
Preferred Stock at the estimated public offering price of $2.00 per share and
estimated net proceeds of approximately $14.7 million.  See "Use of Proceeds."

(2)  See "Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Liquidity and Capital Resources."




                                       22
<PAGE>


                               SELECTED FINANCIAL DATA

     We are providing the following information to aid you in the analysis of
the offering. We derived this information from our audited financial statements
for 1994 through 1998. The 1996 through 1998 financial statements are included
elsewhere in this prospectus. This information is only a summary and you should
read it in conjunction with Shaman's financial statements (and related notes)
and Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere in this prospectus and contained in annual
reports, quarterly reports and other information on file with the Securities and
Exchange Commission.



<TABLE>
<CAPTION>

                                                                               Year Ended December 31,
                                                           -----------------------------------------------------------
                                                             1994         1995         1996         1997        1998
                                                           --------     --------     --------     --------    --------
                                                              (in thousands, except per share data)
<S>                                                         <C>          <C>          <C>          <C>         <C>
Statement of Operations Data:
 Revenue from collaborative agreements                      $  1,360    $  2,210     $  3,406     $  3,500    $  2,660

  Operating expenses:
     Research and development                                 18,643      17,635       19,138       24,140      32,393
     General and administrative                                3,545       3,705        3,537        4,833       5,565
                                                            --------    --------     --------     --------    --------
 Total operating expenses                                     22,188      21,340       22,675       28,973      37,958
                                                            --------    --------     --------     --------    --------
 Loss from operations                                        (20,828)    (19,130)     (19,269)     (25,473)    (35,298)
 Interest income                                               2,045       1,695        1,082        1,218         550
 Interest expense                                               (698)       (569)        (603)      (5,033)     (2,033)
                                                            --------    --------     --------     --------    --------
 Net loss                                                    (19,481)    (18,004)     (18,790)     (29,288)    (36,781)

 Deemed dividend on Preferred Stock                                -           -            -            -      (1,742)
                                                            --------     --------     --------     --------    --------
 Net loss applicable to Common Stockholders                 $(19,481)   $(18,004)    $(18,790)    $(29,288)   $(38,523)
                                                           =========   =========    =========    =========   =========
 Basic and diluted net loss per Common Share(1)             $ (30.02)   $ (27.36)    $ (27.85)    $ (34.44)   $ (38.31)
                                                           =========   =========    =========    =========   =========
 Shares used in calculation of basic and
   diluted net loss per Common Share(1)                          649         658          675          850       1,006
                                                           =========   =========    =========    =========   =========

</TABLE>


<TABLE>
<CAPTION>
                                                                                    At December 31,
                                                            -----------------------------------------------------------
                                                              1994         1995         1996         1997        1998
                                                            --------     --------     --------     --------    --------
<S>                                                            <C>         <C>         <C>        <C>          <C>

Balance Sheet Data:
  Cash, cash equivalents, and short-term investments        $ 39,843    $ 26,665     $ 16,533     $ 21,421    $  9,165
  Working capital                                             33,422      22,850        9,641       14,547       1,043
  Total assets                                                49,673      33,810       22,377       26,753      13,139
  Long-term obligations, including current installments        5,017       6,041        4,816        6,802       5,219
  Senior convertible notes                                         -           -            -        9,967           -
  Accumulated deficit                                        (45,828)    (63,832)     (82,622)    (111,910)   (150,434)
  Total stockholders' equity                                $ 41,300    $ 24,205     $ 11,977     $  5,148    $  2,110

</TABLE>

- ----------

(1) Basic and diluted net loss per share is based on the weighted average number
of Common Shares outstanding during the period. We have not paid any cash
dividends on our capital stock since inception.



                                       23
<PAGE>


                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview of Historical Operations

     Until recently, Shaman was focused on discovering and developing novel
pharmaceutical products for major human diseases by isolating and optimizing
active compounds found in tropical plants with a history of medicinal use. We
have conducted human clinical trials with our three lead product candidates --
SP-303/Provir (Phase III/II), nikkomycin Z (Phase I) and SP-134101 (Phase I) --
targeting five indications. Due to unforeseen delays and costs necessary to
complete additional necessary trials for our lead compound, SP-303/Provir for
the treatment of diarrhea in people with AIDS, we have chosen to discontinue all
pharmaceutical development, manufacturing and marketing activities. Although we
intend to out-license worldwide marketing rights to our pharmaceutical assets,
we now focus our efforts on our new ShamanBotanicals.com division.

     Effective with the close of business on February 1, 1999, our common stock
was delisted from the Nasdaq National Market and moved to the OTC Bulletin Board
effective February 2, 1999.

     On February 1, 1999, we announced and initiated implementation of a
restructuring plan which resulted in the closing down of the operations of our
pharmaceutical business. We now intend to out-license worldwide marketing rights
to all our pharmaceutical compounds and will focus our efforts on the
development and commercialization of botanical dietary supplements through our
ShamanBotanicals.com division. The restructuring plan includes: cessation of
pharmaceutical research and development activities and related operations; sale
or outlicensing of all of our current pharmaceutical research programs;
reduction in force of approximately 60 employees (65% of workforce) and an
additional 12 employees who assisted in closing down the pharmaceutical
business; negotiating a termination of the research and development contract
with Lipha S.A., a wholly-owned subsidiary of Merck KgaA, Darmstadt, Germany
("Lipha/Merck"); settlement of outstanding long-term equipment financing
obligations; sale or disposal of all of our fixed assets that are not needed for
our botanicals business; and sub-leasing a portion of the facility.

     The termination of 60 employees occurred on February 1, 1999. We are in
the process of finalizing an estimate of the costs of the restructuring which
will be recorded in the first quarter of 1999. We expect that such charge will
range from $2.4 million to $5.0 million.

Overview of Current Operations

     The concept for our ShamanBotanicals.com division was developed in 1998,
and it has become the focus of our operations in 1999. The purpose of the
botanicals business is to discover, develop and market novel, proprietary
botanical dietary supplements derived from tropical plant sources. The unique
positioning of our botanicals business stems from significant financial
investment, more than 10 years of extensive field research by our teams of
ethnobotanists and physicians, and pharmaceutical-level chemical
standardization, biological and clinical testing. In the last decade, we have
amassed a large body of information on the health benefits of thousands of
tropical plant species that have a history of human use and have organized this
into an extensive relational database. This database includes over 2,600
tropical plants, many of which have not been introduced or fully developed in
the U.S. dietary supplement market. We have identified plants with a documented
ethnomedical history of use in our library and database of botanicals for use in
key market categories with significant commercial potential. Because many of
these plants reflect the previously untapped plant diversity of the rainforests,
many represent novel botanical products that have the opportunity to
attain a strong, proprietary market position.

     We began our pharmaceutical  operations in March 1990. To date, we have not
sold any products and do not anticipate receiving product revenue in the near
future from our pharmaceutical operations. Our accumulated deficit at December
31, 1998, was approximately $150.4 million. We expect to continue to incur
losses through at least 1999 and for the foreseeable future as we close down our
pharmaceutical business and focus our efforts to discover, develop, and market
botanical dietary supplements derived from tropical plant sources through our
ShamanBotanicals.com. As of December 31, 1998, we had cash, cash equivalents and
short-term investment balances of approximately $9.2 million. Unless we are
successful in our efforts to out-license the pharmaceutical programs, partner
our botanical programs, sell our botanical products, or obtain additional
funding, our cash resources will be substantially used in satisfying our
existing liabilities, and hence, we will be unable to fund the operations of our
botanicals business.



                                       24
<PAGE>

Results of Operations for the Years Ended December 31, 1998, 1997 and 1996

     The results of operations for the years ended December 31, 1998, 1997 and
1996 were for our pharmaceutical operations. Our results of operations for
fiscal year 1999 will not be comparable, as we ceased operations of our
pharmaceutical business and focused our efforts in our botanical business in
first quarter of 1999.

     We recorded collaborative revenues of $2.7 million, $3.5 million and $3.4
million for 1998, 1997, and 1996, respectively. Revenues for 1998 resulted from
research funding from our collaboration with Lipha/Merck and research funding
from our collaboration with Ono Pharmaceutical Co. Ltd. of Osaka, Japan ("Ono"),
which expired in May 1998. Revenues for 1997 also resulted from research funding
from our collaboration with Lipha/Merck and Ono. Revenues for 1996 resulted from
research funding from our collaboration with Ono, an additional $1.0 million
payment from Ono for enhanced rights to our antidiabetic compounds, and research
payments and access fees from our collaboration with Lipha/Merck.

     In December 1998, we renegotiated the terms of the existing agreement with
Lipha/Merck. Under the new terms, we forgave $6.0 million in aggregate payments
due over the remaining term of the original agreement in exchange for a one-time
up-front payment of an aggregate of $2.0 million, consisting of a $1.0 million
research payment (which remains recorded as deferred revenue that we have not
yet earned) and a $1.0 million equity investment. We are currently in
negotiations with Lipha/Merck for the discontinuation of this agreement. There
will be no further research payments from Lipha/Merck.

     We incurred research and development expenses of $32.4 million, $24.1
million, and $19.1 million for 1998, 1997 and 1996, respectively. These expenses
include salaries for scientific personnel, clinical development costs,
laboratory supplies, patent protection and consulting fees, travel, plant
collections, facilities expenses and other expenditures relating to research and
product development. Research and development expenses increased $8.3 million in
1998 compared with 1997, and increased $5.0 million in 1997 compared with 1996.
The increases in 1998 were primarily attributable to the completion of a $7.0
million Phase III human clinical trial for SP-303/Provir for the treatment of
diarrhea in people with AIDS and $2.4 million of the manufacturing scale-up and
to increased scientific salaries of $1.2 million, which were partially offset by
a reduction of costs associated with our diabetes program of $2.8 million. The
increase in 1997 was primarily attributable to an increase in clinical
development activities with respect to SP-303/Provir of $3.8 million and to
increased scientific salaries of $1.2 million, which were partially offset by
reduced expenses for clinical development activities for nikkomycin Z of $1.1
million. Research and development expenses are expected to decrease in 1999 as
we ceased operations in our pharmaceutical business and focused our efforts in
our botanicals business, effective February 1, 1999.

     General and administrative expenses were $5.6 million, $4.8 million and
$3.5 million for 1998, 1997 and 1996, respectively. These expenses include
administrative salaries, consulting, legal, travel and other operating expenses.
General and administrative expenses increased $0.7 million in 1998 compared to
1997, and increased $1.3 million in 1997 compared to 1996. The increase in 1998
over 1997 was primarily attributable to additional costs, including an increase
in compensation, consulting expenses and commercial development activities of
$530,000, related to the development of SP-303/Provir. The increase in 1997 was
primarily attributable to an increase in compensation and marketing research of
$388,000 related to development of SP-303/Provir, as well as additional legal
expenses of $631,000 primarily related to certain disputes related to our
intellectual property rights. General and administrative expenses are expected
to decrease in 1999 as we ceased operations in our pharmaceutical business and
focused our efforts in our botanicals business, effective February 1, 1999.

     Interest income was $0.6 million, $1.2 million and $1.1 million for
1998, 1997 and 1996, respectively. Interest income decreased $700,000 in 1998
compared with 1997 and increased $100,000 in 1997 compared with 1996. Interest
income fluctuations have been consistent with changes in average cash and
investment balances with which we substantially funded our operations in 1998,
1997 and 1996. The balances of cash, cash equivalents and investments were $9.2
million, $21.4 million and $16.5 million at December 31, 1998, 1997 and 1996,
respectively.

     Interest expense was $2.0 million, $5.0 million and $603,000 for 1998,
1997 and 1996, respectively. Interest expense decreased in 1998 compared with
1997 principally due to a $3.7 million non-cash interest charge related to the
issuance of senior convertible notes in June 1997, offset by interest expense
related to capital lease agreements and the secured debt financing. Interest
expense increased in 1997 compared with 1996 principally due to a $3.7 million
non-cash interest charge related to the issuance of senior convertible notes in
June 1997, as well as the interest expense related to our secured debt financing
in May 1997. Interest expense in the future will be dependent in part on our
capacity to finance future operating and equipment needs.

     At December 31, 1998, we had federal net operating loss carryforwards of
approximately $48.6 million. The federal net operating loss carryforwards will
expire at various dates beginning in 2004 through 2013, if not sooner utilized.
Utilization of the net operating losses and credits is subject to a substantial


                                       25
<PAGE>

annual limitation due to the "change in ownership" provisions of the Internal
Revenue Code of 1986, as amended. The annual limitation may result in the
expiration of net operating losses and credits before utilization.

Liquidity and Capital Resources

     As of December 31, 1998, our cash, cash equivalents, and investments
totaled approximately $9.2 million, compared with $21.4 million at December 31,
1997. We invest excess cash according to our investment policy that provides
guidelines with regard to liquidity, type of investment, credit ratings and
concentration limits.

     In April  1999,  we  entered  into a  credit  facility  and  note  purchase
agreement with certain investors, stockholders, key executives, and members
of the Board of Directors, pursuant to which we may borrow approximately $1.0
million from these investors at any time commencing May 14, 1999 and until the
earlier of the completion of this public offering or September 1, 1999. Any debt
that we incur under this agreement will be convertible, at the option of the
note holder into shares of Series R Preferred Stock at a conversion price of
$2.00 per share. The debt bears interest at rate of 12% per annum and will be
due and payable on the earlier to occur of (i) thirty days after the
consummation of this offering, or (ii) December 31, 1999. In addition, we issued
cashless exercise warrants to these investors to purchase an aggregate of
249,502 shares of Series R Preferred Stock at a price of $2.00 per share. These
warrants are exercisable upon the consummation of this offering and through the
third anniversary date of such consummation, subject to acceleration upon
certain events. If the conversion price on the day we borrow under this credit
facility is less than the closing sales price of our common stock as reported on
the OTC Bulletin Board, we will record a charge to interest expense over the
term the debt is outstanding. This charge to interest expense will increase our
net loss applicable. We will be unable to determine the exact amount of the
charge to be recognized until the date the debt is issued.

     On December 10, 1998, we and certain institutional investors exchanged an
aggregate of $4.8 million (including accrued interest) of the Senior Convertible
Notes for an aggregate of 4,784 shares of our Series D Convertible Preferred
Stock. Each share of Series D Convertible Preferred Stock is entitled to
receive, when, as, and if declared by the Board of Directors out of funds
legally available for such purpose, cumulative dividends at the rate of $55 per
annum. Dividends on the Series D Preferred Stock are payable in cash or shares
of common stock or any combination of cash and shares of common stock, at our
option and are payable quarterly on February 1, May 1, August 1 and November 1
of each year. Each share of Series D Preferred Stock is convertible, at any
time, into the common stock at the lesser of (a) $22.50 per share or (b) 90% of
the low trading price during a designated time period prior to the conversion.
In addition, the holders received an aggregate of 38,373 warrants to purchase
additional shares of common stock in exchange for surrendering the redemption
rights previously held by them under the Notes. The warrants were priced at 150%
of the average closing price for the month of December 1998. We have attributed
a value of $943,680 to these warrants.

     The delisting of our common stock from The Nasdaq National Market
constituted an Optional Redemption Event (as defined in the Certificate of
Designation of Series D Preferred Stock) for the Series D Preferred Stock. In
connection therewith, on February 4, 1999, we issued a Control Notice (as
defined in the Certificate of Designation of Series D Preferred Stock) that
prevented the redemption of the Series D Preferred Stock. This Control Notice
will remain in effect for as long as we are not listed on any of The Nasdaq
National Market, The Nasdaq SmallCap Market, the American Stock Exchange or the
New York Stock Exchange. Delivery of the Control Notice had the effect of
increasing the annual dividend to $180 per share and adjusting the conversion
price of the Series D Preferred Stock to 72% of the low trading price during a
designated time period prior to the conversion.

     In December 1998, we completed a private sale of 240,604 shares of common
stock for aggregate net proceeds of approximately $7.1 million. In connection
with this offering, we have committed a five-year, 3.6% royalty on net sales of
SP-303/Provir, if any, in the United States for distribution to HIV/AIDS
charities. We intend to honor this royalty payment through the sale of our first
botanical product, if any.

     In December 1998, we issued 37,360 shares of common stock to consultants
for services rendered. We recorded an expense of approximately $1.1 million in
conjunction with the consulting services.

     In October 1998, we completed the sale to the public of an aggregate of
140,880 shares of our Series C Convertible Preferred Stock for aggregate gross
proceeds of $14.1 million. Each share of Series C Preferred Stock is entitled to
receive cumulative dividends paid semi-annually to the holders of record of such
shares as follows: (i) an annual stock-on-stock dividend, paid in arrears, in
shares of common stock (calculated as the quotient of $10.00 divided by 85% of
the average closing price of the common stock for the 10-day trading period
ending three trading days prior to the date the dividend is paid); plus (ii) a
cash amount equaling 0.00005% of our U.S. net sales of our SP-303/Provir product
for the treatment of diarrhea, if any, for the preceding two calendar quarters
less $5.00. If, under Delaware law, we are unable to pay the cash portion of the
dividends, then the cash portion will be paid in shares of common stock (valued
at 85% of the average closing price of the common stock for the 10-day trading
period ending three trading days prior to the date on which the dividend is


                                       26
<PAGE>

paid). We intend to honor this royalty portion of the dividend through the sale
of our first botanical product, if any. Each share of the Series C Preferred
Stock was convertible for a period of 30 days after the first issuance (August
18, 1998) and will be convertible again commencing 12 months after the initial
issuance date at the election of each holder, and automatically on the sixth
anniversary of the initial issuance date into the greater of (a) 0.8333 shares
of common stock or (b) such number of shares of common stock as equals $100 (the
price paid per share of Series C Preferred Stock) divided by 85% of the average
closing price of the common stock reported by Nasdaq for the 10-day trading
period ending three trading days prior to the date of conversion. The common
stock is currently trading on the OTC Bulletin Board. During the initial 30-day
conversion period for the Series C Preferred Stock, 24,922 shares of the Series
C Preferred Stock were converted into an aggregate of 93,077 shares of common
stock. In connection with the issuance of the Series C Preferred Stock, we
recognized a non-cash charge in the amount of $679,000.

     In June 1998, we entered into Stock Purchase Agreements with certain of
our stockholders (the "Buyers") pursuant to which we acquired the right to sell
to the Buyers, subject to certain conditions up to an aggregate of 7,000 shares
of Series B Custom Convertible Preferred Stock for an aggregate purchase price
of $7,000,000. The Stock Purchase Agreements were terminated upon the closing of
the Series C Convertible Preferred Stock Financing in October 1998. As
consideration for entering into the Stock Purchase Agreements, we issued to the
Buyers warrants to purchase an aggregate of 17,500 shares of common stock. The
warrants are exercisable for a period of five years at an exercise price per
share equal to 115% of the average trading price of the common stock during
specified measurement periods. We have attributed a value of $1.5 million to
these warrants.

     In June 1997, we issued $10.4 million of Senior Convertible Notes. The
notes mature in August 2000 and bear interest at a rate of 5.5% per annum.
Interest on the notes was payable in common stock or cash at our option.
Initially, the notes were convertible into common stock at 100% of the low
trading price during a designated time period prior to conversion provided that
the conversion price would not be less than $110.00 per share. Starting in
November 1997, the notes were convertible into common stock at a 10% discount
from the low trading price during a designated time period prior to the
conversion, with a floor of $110.00 through March 31, 1998, pursuant to a
November 1997 understanding with the note holders to revise the terms of the
notes (see next paragraph). Of the notes issued, $400,000 was issued to the
placement agent as part of the placement fee. We paid the placement agent an
additional $300,000 in cash. The placement fees and other offering costs were
capitalized in other assets as deferred issuance costs and were amortized to
interest expense over the life of the notes to the extent the notes were not
converted to common stock. The net proceeds totaled approximately $9.5 million
after the placement agent's fees and other offering expenses.

     In March 1998, we and the purchasers of the notes entered into an
Amendment Agreement (the "Amendment Agreement") with the purchasers of the notes
in order to avoid conversion of the notes at a price that would be unduly
dilutive to our existing stockholders. As consideration for entering into the
Amendment Agreement, we issued to the purchasers of the notes warrants to
purchase an aggregate of 6,875 shares of common stock. The warrants are
exercisable through March 18, 2001 at an exercise price of $150.00 per share. We
have attributed a value of $309,000 to these warrants. On December 10, 1998, we
issued to the note holders an aggregate of 4,784 shares of the Series D
Convertible Preferred Stock in exchange for the cancellation of an aggregate of
$4.8 million (including accrued interest) of the notes.

     In May 1997, we obtained a $5.0 million, 36-month term loan to pay off
pre-existing debt, finance capital asset acquisitions and finance continued
research and clinical development of our product candidates. The loan carries an
interest rate of 14.58% and is payable in equal monthly installments over the
term of the loan. The lender was granted ten-year warrants to purchase 10,000
shares of common stock at $125.00 per share. We have attributed a value of
$648,000 to these warrants.

     In April 1997, we sold 80,000 shares of common stock at $99.40 per share
in a registered direct public offering, which yielded gross proceeds of $7.95
million. The net proceeds of approximately $7.8 million from this offering were
used for the continued research and clinical development of our product
candidates.

     In January 1997, we sold 100,000 shares of common stock in a registered
direct public offering for gross proceeds of $9.0 million. The net proceeds of
approximately $8.1 million from this offering were used for the continued
research and clinical development of our product candidates.

     In September 1996, we entered into a five-year collaborative agreement
with Lipha/Merck to jointly develop our antihyperglycemic drugs. Upon signing
the collaboration, we received an annual research fee of $1.5 million which was
amortized to revenue over twelve months, as work was performed. We also received
approximately $3.0 million for 19,446 shares of common stock priced at $154.20
per share, representing a 20% premium to the weighted average price of the
common stock at the time of purchase. In exchange for development and marketing
rights in all countries except Japan, South Korea, and Taiwan (which are covered


                                       27
<PAGE>

under an earlier agreement between Shaman and Ono), Lipha/Merck agreed to
provide up to $9.0 million in research payments and up to $10.5 million in
equity investments priced at a 20% premium to a multi-day volume weighted
average price of the common stock at the time of purchase. The agreement also
provided for additional preclinical and clinical milestone payments to us in
excess of $10.0 million per compound for each antihyperglycemic drug developed
and commercialized. Lipha/Merck agreed to bear all pre-clinical, clinical,
regulatory and other development expenses associated with the compounds selected
under the agreement. In addition, as products are commercialized, we would
receive royalties on all product sales outside the United States and up to 50%
of the profits (if we exercised our co-promotion rights) or royalties on all
product sales in the United States. Certain of the milestone payments would be
credited against future royalty payments, if any, due to us from sales of
products developed pursuant to the agreement.

     In December 1998, we renegotiated the terms of the existing agreement with
Lipha/Merck. Under the new terms, we forgave $6.0 million in aggregate payments
due over the remaining term of the original agreement in exchange for a one-time
up-front payment of an aggregate of $2.0 million, consisting of a $1.0 million
research payment (which remains recorded as deferred revenue that we have not
yet earned) and a $1.0 million equity investment.

     For the year ended December 31, 1998, we recognized $1.9 million in
revenue from the Lipha/Merck collaboration. In addition, we received a total
$2.5 million for issuance of 57,762 shares of common stock (40,650 shares priced
at $37.00 per share in September 1998 and 17,112 shares priced at $58.40 per
share in December 1998), each representing a 20% premium to the weighted average
price of the common stock at the time of purchase.

     On February 1, 1999, we discontinued all the research and development
activities related to the collaborative agreement. We are currently in
negotiations with Lipha/Merck for the discontinuation of this research
agreement. There will be no further research payments from Lipha/Merck.

     In July 1996, we closed a private placement pursuant to Regulation S under
the Securities Act of 1933, as amended, in which we received gross proceeds of
$3.3 million for the sale of 400,000 shares of Series A Convertible Preferred
Stock and for the issuance of a six-year warrant to purchase 27,500 shares of
common stock at an exercise price of $203.60 per share. The Preferred Stock does
not carry a dividend obligation and will convert into common stock no later than
July 23, 1999 at a price per share between $120.00 and $163.00, depending on the
market value of common stock during the period prior to conversion. The holder
of preferred shares is entitled to a liquidation preference of $163.00 per
share.

     We have incurred substantial  additional costs in the first quarter of 1999
relating to our restructuring in February 1999. We expect to continue to incur
losses at least through 1999. Our cash, cash equivalents and investment balances
are approximately $9.2 million at December 31, 1998. Shaman anticipates that its
cash, cash equivalents and investment balances, and the net proceeds from this
offering, assuming all of the shares are sold in the offering, will be adequate
to fund our operations through at least the end of 1999. Our projections show
that cash on hand will be sufficient only to fund operations at the current
level through the end of the quarter ended June 30, 1999. Unless we are
successful in our efforts to secure at least $1.0 million under the Senior
Secured Convertible Promissory Notes, to sell or out-license our pharmaceutical
products, or to sell or establish collaborative agreements to sell our botanical
products, we will be unable to fund our current operations beyond quarter ended
June 1999. In addition, unless we are successful in our efforts to raise
additional capital through this offering or other offerings of equity
securities, to sell or out-license our pharmaceutical products, or to sell or
establish collaborative agreements to sell our botanical products, our cash
resources will be used to satisfy our existing liabilities, and we will
therefore be unable to fund the operations of our botanicals business, which may
result in significant delays of our planned activities or the cessation of our
operations. Even if we are successful in these efforts to raise additional
funds, such funds may not be adequate to fund the operations of our botanicals
business on a long-term basis. If additional funds are raised by issuing equity
securities, significant dilution to existing stockholders may result and there
can be no assurance that additional funding will be available on reasonable
terms, or at all.

Year 2000 Compliance

     The Year 2000 issue is the result of computer programs being written using
two digits rather than four to define the applicable year. Any of our computer
programs or hardware that have date-sensitive software or embedded chips may
recognize a date using "00" as the year 1900 rather than the year 2000. This
could result in a system failure or miscalculations causing disruptions of
operations, including, among other things, a temporary inability to process
transactions or engage in similar normal business activities.

     Based on recent assessments, we have determined that we will be required
to certify portions of our software and certain hardware so that those systems
will properly utilize dates beyond December 31, 1999. We presently believe that
with modifications or replacements of existing software and certain hardware,
the Year 2000 issue can be mitigated. We believe that such modification and
replacements are not significant, and should such modification and replacements
be delayed there would be no material impact on our operations.



                                       28
<PAGE>

     We are approximately 85% complete with the assessment of all internal
systems that could be significantly affected by the Year 2000. To date, cost
estimates for upgrades for those systems not in compliance total approximately
$200,000. After the assessment phase is completed, we will have to purchase,
install and test the upgrades to ensure they meet internal Year 2000 compliance.
We expect to complete our internal Year 2000 readiness program in the third
quarter of 1999. We are in the process of asking our significant suppliers and
subcontractors that do not share information systems with us (external agents)
whether their systems are Year 2000 compliant. To date, we are not aware of any
external agent with a Year 2000 issue that would materially impact our results
of operations, liquidity, or capital resources. However, we have no means of
ensuring that external agents will be Year 2000 ready. The inability of external
agents to complete their Year 2000 resolutions to process in a timely fashion
could materially impact us.

     We currently have no contingency plans in place in the event we do not
complete all phases of the Year 2000 program. We plan to evaluate the status of
completion in second quarter 1999 and determine whether such a plan is
necessary.

Qualitative and Quantitative Disclosure About Market Risk

     We are exposed to market risk, including changes to interest rates. A
discussion of our accounting policies for financial instruments and further
disclosures relating to financial instruments is included in the Summary of
Significant Accounting Policies in the Notes to Financial Statements.

     We monitor the risks associated with interest rates and foreign currency
exchange risks and have established policies and business practices to protect
against these and other exposures. We place our investments in instruments that
meet high credit quality standards, as specified in our investment policy
guidelines; the policy also limits the amount of credit exposure to any one
issue, issuer, or type of instrument and does not permit derivative financial
instruments in our investment portfolio. As a result, we do not expect any
material loss with respect to our investment portfolio.

     The following table provides information about our financial instruments
that are sensitive to changes in interest rates. For investment securities, the
table presents principal cash flows and related weighted-average interest rates
by expected maturity dates.

<TABLE>
<CAPTION>

                                                                                                   Fair Value
                                                                                                       at
                               1999      2000      2001      2002     2003   Thereafter     Total     12/31/98
                               ----     ----       ----     ----     ----   ----------     -----     --------
<S>             <C>        <C>    <C>    <C>    <C>    <C>
ASSETS
(in thousands)

Cash equivalents             $2,955        -         -         -        -           -     $2,955       $2,945
Weighted average
 interest rate                5.28%

Short-term investments      $3,282        -         -         -        -           -     $3,282       $3,277
Weighted average
 interest rate                5.76%

LIABILITES
(in thousands)

Long-term debt, including
 current portion
- -------------------------
Fixed rate                   $2,973   $1,371       $540     $540       -           -         $5,424   $4,628
Weighted average
 interest rate               13.64%   13.56%     12.00%   12.00%


</TABLE>



                                       29
<PAGE>


                                BUSINESS

This prospectus also contains, in addition to historical information,
forward-looking statements that involve risks and uncertainties. Our actual
results could differ materially from those anticipated in these forward-looking
statements as a result of certain factors, including the risks faced by us
described below and elsewhere in this prospectus.

Overview

     We are focused on the discovery, development, and marketing of novel,
proprietary botanical dietary supplements derived from tropical plant sources
via our ShamanBotanicals.com division. We also have available for out-licensing
a pipeline of novel pharmaceutical product candidates for major human diseases
developed by isolating active compounds from tropical plants with a history of
medicinal use.

Botanicals

Background

     In 1997, the U.S. dietary supplement market was $12.9 billion. Of this,
over $4.0 billion were herbal or botanical dietary supplements. In 1998, this
number was projected to reach $5.0 billion, with a compounded yearly growth rate
of 15% to 25%. In 1997, 24% of U.S. households reported using herbal or
botanical dietary supplements. The growth of this market has been led by
consumers who are interested in complementary, non-pharmaceutical options for
treating symptoms, fulfilling unmet dietary needs, and optimizing health, either
as an alternative to, or in conjunction with, more conventional medical
approaches. We believe that the use of these products will continue to expand
based upon the aging of the population, increasing scientific evidence and
acceptance by the conventional medical establishment, and the recent entrance of
powerful consumer companies which provide greater product confidence, while
growing the base of consumer users.

     We believe that room exists for significant continuing growth of the
dietary supplement market and expect the two key drivers of market growth to be
(1) growth in the number and breadth of consumers utilizing these products; and
(2) continuing effective product innovation to fuel both trial and repurchase.

     Growth in the number and breadth of consumers utilizing these products has
already begun, and is based in part upon the entrance of the large consumer
healthcare companies into the botanical dietary supplements market. These
companies have increased the visibility of botanical dietary supplements,
placing them not only in local health food stores but also in neighborhood
grocery stores, drug stores, and mass merchandisers. Additionally, these
companies are spending on large direct-to-consumer advertising campaigns,
placing advertisements during primetime television and in mainstream newspapers
and magazines. Consumer surveys show this advertising has resulted in a broader
base of consumers being made aware of, trying and utilizing dietary supplements.

     Simultaneous with the broadening of the consumer base, the botanical
dietary supplements market has grown partially as a result of the media
highlighting new products. For example, in 1997, ABC's 20/20, The New York Times
and Newsweek carried a series of stories about St. John's wort, increasing trial
and usage of this dietary supplement dramatically. Interestingly, while the
month-on-month growth of sales of St. John's wort has now slowed, this initial
increase in sales has been maintained throughout the industry. These new product
"bursts" have fueled episodic but sustained market growth by driving new
purchases, and in the process, the repurchase of other products once the
consumer is at the point of purchase. Hence, the industry's view is that the
media and consumers are looking for continuing effective product innovation--for
the next St. John's wort--to fuel both trial and repurchase. Products with a
proprietary position have proven to be particularly successful in the past.

     Finally, as more consumers have entered the dietary supplement market,
they have also begun to demand better quality, more consistency and
standardization of products, and scientific evidence regarding the safety and
efficacy of products. Increased demand has also strained the supply of natural
plant material for some popular products. Not all companies in the industry have
proven capable of meeting these consumer demands.

Strategy

     The concept for our ShamanBotanicals.com division was developed in 1998,
and it has become the focus of our operations in 1999. The purpose of the
botanicals business is to discover, develop and market novel, proprietary
botanical dietary supplements derived from tropical plant sources. The unique
positioning of our botanicals business stems from our prior experience and
efforts in developing pharmaceutical products from tropical plant sources,


                                       30
<PAGE>

including significant financial investment, more than 10 years of extensive
field research by our teams of ethnobotanists and physicians, and
pharmaceutical-level chemical standardization, biological and clinical testing.
We are applying this methodology to our new industry, and we intend to set a new
standard in this industry. In the last decade, we have amassed a large body of
information on the health benefits of thousands of tropical plant species that
have a history of human use, and we have organized this information into an
extensive relational database. This database includes over 2,600 tropical
plants, many of which have not been introduced or fully developed in the U.S.
dietary supplement market. We have identified plants with a documented
ethnomedical history of use in our library and database of botanicals for use in
key market categories with significant commercial potential. Because many of
these plants reflect the previously untapped plant diversity of the rainforests,
they may represent novel botanical products that have the opportunity
to attain a strong, proprietary market position. We currently have a
fully-developed product, SB-300, and we expect to commercialize this product in
the near future by applying the funds raised in this rights offering and via
partnering development agreements we are working to put in place.

     We have the opportunity to differentiate our product candidates in
consumers' minds relative to those of our competitors. Key points of
differentiation include:

     - Novel plants/products for unmet needs;
     - Documented, first-hand field experience with traditional use;
     - Rainforest-based plants and products (most current botanical
       supplements products come from plants in temperate regions);
     - Our commitment to conservation and reciprocity;
     - Sustainable sourcing and supply;
     - Quality manufactured, standardized products; and
     - Clinically-tested products.

     Our marketing strategy for dietary supplements involves a step-wise
product introduction and distribution approach. We plan to launch our first
product, SB-300, a product to prevent water loss and promote normal bowel
function, to the HIV/AIDS Community through the Internet, on our website
ShamanBotanicals.com, and through direct response marketing. We may also market
SB-300 to the acute watery diarrhea or traveler's diarrhea markets, again via
the Internet, possibly in conjunction with an Internet site partner. Selling a
traveler's health-related product is a natural since the two main uses of the
Internet are healthcare information and travel. Next, we plan to partner and
possibly co-brand with first-rate, quality partners in the three key growth
channels of distribution: mass market, Internet, and multi-level (or network)
marketing. Finally, building on the expected growing recognition of the Shaman
brand name (to be built by product introduction), we plan to broaden our
Internet presence both within the HIV/AIDS niche and beyond to include a full
line of Shaman Botanicals, and will also explore niche retail opportunities. We
currently do not intend to target the traditional health food markets due to the
fragmented and crowded space and difficulty in achieving product differentiation
and satisfactory margins.

Product Discovery and Development Process

     We build on the knowledge and expertise of ethnobotanist and physician
teams who work with traditional healers to identify effective treatments in the
therapeutic areas that we have targeted. These teams gather comparative data on
traditional medicinal and health uses of plants from geographically diverse
tropical areas and prioritize plant candidates based on common use among
cultures and other factors. The prioritization process includes cross-checking
field-derived information against the results of literature searches as to
chemical constituents, previously discovered biological activity and other
reported medicinal uses. This process is integral to both our pharmaceutical and
dietary supplement discovery and development programs.

     We were able to initiate our botanicals business by further exploring the
botanical library and pipeline we have developed over the past 10 years. In the
last decade, we have amassed a large body of information on the healing benefits
of thousands of tropical plant species that have a history of human use and have
organized this information into an extensive relational database. This database
includes information on over 2,600 tropical plants, many of which have not been
introduced or fully developed in the U.S. dietary supplement market. Currently,
most dietary supplements are derived from plants from temperate regions. We have
identified plants with a documented ethnomedical history of use in our library
and database of botanicals for use in key market categories with significant
commercial potential.

     We intend to differentiate ourselves within the botanical dietary
supplement marketplace by backing novel products and promotion with quality
research, development and manufacturing, a carry-over from our pharmaceutical
culture and skill base. Given consumer demand for quality and the relative lack
of specific regulatory standards in the dietary supplement industry, we intend
to set our own high standard for quality and product standardization for our
botanical products. We intend to develop chemical markers and standardization
processes for all our products, including safety verification and, where
appropriate, human clinical testing of potential products. Once completed,
published clinical data can be utilized for educational purposes with consumers
and retailers seeking more information about our products. This distribution of


                                       31
<PAGE>

"third party" literature for education and promotional sales can be particularly
effective with Internet purchases. We believe that these elements, along with
unique formulations and existing and future patents, should add to the
proprietary position of our products.

Product Candidates

     We have strategically identified multiple areas of dietary supplement
product interest and have identified specific priority product candidates based
on four criteria:

     - key market categories with significant commercial potential,
     - the needs of an aging demographic in the U.S. population,
     - areas where quick, symptomatic relief could be observed, and
     - areas where we have first-hand ethnomedical experience and
       where sustainable supply of raw materials exists.

     Some of these proposed product areas include gastrointestinal relief,
energy boosters, sexual function aids, antioxidants, sleeping aids, calming
agents and weight management.

     We expect that our first dietary supplement product will be SB-300,
designed to prevent water loss and promote normal bowel function. SB-300 is an
extract of Croton lechleri, a plant used by indigenous people for relief of
gastrointestinal symptoms, and contains a chemical marker, SP-303, a patented,
clinically proven antidiarrheal and to the traveler's market. SB-300 also has a
patented formulation. We plan to market this product ourselves initially to the
HIV/AIDS Community and to the traveler's market through direct response and
Internet channels. We are also exploring other products appropriate for use by
the HIV/AIDS consumer which could be sold on our website, including some
products currently available on the market, nutritional multi-compound "systems"
specifically designed to meet the needs of people with HIV/AIDS, as well as
future applications of our own novel, proprietary products.

     In addition to SB-300, our two near-term product lines are the "Croton
Line," which currently includes four product candidates, and the
"EthnoEssentials Line" which includes multiple product candidates culled from
our ethnomedical library.

     The Croton Line is currently a series of four product candidates, all of
which are derived from the Croton lechleri tree that grows abundantly in South
America. Drawing from knowledge of traditional uses, the material from different
parts of the tree will serve as the basis for our products. This concept of
basing a line of products on a single plant with multiple known traditional uses
has been a successful model in the natural products sector, including product
lines based on hemp and the tea tree. We expect that our Croton Line of products
could include:

     - SB-300,  an oral  dietary  supplement  to  prevent  water loss and
       promote normal bowel function for the traveler's market made from a
       portion  of the latex or sap of the tree that  includes  a compound
       with clinically proven antidiarrheal activity;
     - IBS-400,  an oral dietary  supplement  that helps  support  normal
       stomach  and  bowel  function  and  includes  a  clinically  proven
       antidiarrheal  component along with three other recognized products
       clinically  proven to relieve  common  symptoms of irritable  bowel
       syndrome in a unique patented formulation;
     - Cold Sore-CL,  a topical cold sore product made from a broader cut
       of the latex (a  by-product  of making  SB-300  and  IBS-400)  that
       includes   two  active   compounds,   one  with   clinically-tested
       anti-herpes  activity and another  with  documented  wound  healing
       effects;
     - AntiOx-CL,  an oral dietary  supplement  made from bark  remaining
       after   extracting   the  latex  and  which   includes   recognized
       antioxidant compounds.

     The Croton Line also presents a compelling conservation story, since
nearly every part of the plant can be efficiently utilized in the production
process.

     The EthnoEssentials Line is expected to be initially a series of six
products, with additional products from the botanical library expected to follow
over time. The common elements of the product line will be the products'
tropical rainforest origins, history of traditional use and first-hand
ethnomedical validation, and the sustainably harvested, responsible sourcing of
their raw material. According to our research in the botanicals industry, we
believe there are currently no other product lines in the U.S. based solely on
rainforest and ethnomedical roots. We therefore should be able to create a novel
space in the market, similar to what has previously been done by product lines
focused on Chinese herbs or Ayurvedic botanicals.



                                       32
<PAGE>

      The EthnoEssentials Line of products is expected to include:

          -  Ethno-Energy, a dietary supplement to promote and
             maintain energy;
          -  Ethno-Ox, a dietary supplement with antioxidant
             properties;
          -  Ethno-Calm, a dietary supplement to promote and maintain
             a sense of well-being;
          -  Ethno-Rest, a dietary supplement to promote restful sleep;
          -  Ethno-Fit, a dietary supplement to maintain weight; and
          -  Ethno-Vigor, a dietary supplement to promote vigor and
             performance, for both males and females.

     The EthnoEssentials Line could feature packaging that includes stories and
pictures relating to the traditional origins of the products, including
geography, tribes, and folklore. In addition to the attractive rainforest and
traditional use themes of this line, the EthnoEssentials Line can feature
packaging and labeling highlighting our commitment to reciprocity of the
cultures and peoples with which we work, as well as our attitude towards
conservation and sustainable harvesting. We can further highlight the Healing
Forest Conservancy, a non-profit organization supported by us and dedicated to
maintaining biological and cultural diversity in rainforest areas. See
"Business--Community Commitment--The Healing Forest Conservancy." Highlighting a
company's commitment to causes has been successful in other consumer products
models, such as Ben & Jerry's Homemade Inc.'s "1% for Peace," a commitment to
give one percent of profits to organizations supporting disarmament.

     Another potential product opportunity is a proprietary, enhanced
formulation of one of the world's leading phytomedicines. We have filed a patent
application for this product. We believe this product represents a significant
out-licensing opportunity.

     All of these potential products are based on plant material on the
grandfathered old dietary ingredient list of the FDA, allowing for immediate
product introduction without a need for regulatory application or approval.

     We believe our current and prior research and development efforts would
allow us to introduce up to ten products, including human clinical testing,
within the first two years of our botanicals operations. We believe that all of
these product areas offer significant opportunity for growth. With the exception
of SB-300, we intend to secure corporate partners for the development and
commercialization of all of these products.

Sales and Marketing

     Our marketing strategy for dietary supplements involves a step-wise product
introduction and distribution approach. We plan to launch our first product,
SB-300, to the HIV/AIDS Community through the Internet on our web site at
ShamanBotanicals.com, direct response marketing and targeted access to mail
order and urban pharmacies catering to the needs of the HIV community. SB-300
could be further leveraged by targeting the acute watery diarrhea or traveler's
diarrhea market, again via the Internet, and specifically through an exclusive
or semi-exclusive Internet site partner. Selling a traveler's health-related
product is a natural since the two main uses of the Internet are healthcare
information and travel. Next, we plan to partner and possibly co-brand with
first-rate, quality partners in the three key growth channels of distribution:
mass market, Internet and multi-level (or network) marketing. Finally, building
on the expected growing recognition of the Shaman brand name (to be built by
product introduction), we plan to broaden our Internet presence both within the
HIV/AIDS niche and beyond to include a full line of botanical products, and
will also explore niche retail opportunities. We currently do not intend to
target the traditional health food sector.

     With respect to promotion, we anticipate that we will be responsible for
the cost of promotion only in the Internet/direct response channel for SB-300.
We expect to enter into partnerships with large consumer healthcare and dietary
supplement companies to sell our products through other marketing channels and
that these partners will be responsible for promotion of the products. We intend
that each of our partners will commit to a sufficient level of promotional
support for our products, including prominent use of the Shaman brand name.

     Customers and Partners

     The market for dietary supplements in the United States is growing. In
recent consumer surveys, 25% to 30% of consumers report having utilized a
botanical dietary supplement, and 36% report moderate to heavy use of
complementary medicine.

     We believe that our botanicals business has two key initial classes of
customers: consumers, primarily in the HIV/AIDS Community and the traveler's
market, who could purchase our first product, SB-300, designed to prevent fluid


                                       33
<PAGE>

loss and normalize bowel function; and mass market, Internet and multi-level
companies that are interested in licensing or partnering with us for the
commercialization of our products.

     Potential SB-300 customers

     Diarrhea in people with HIV and AIDS is a devastating syndrome. In 1997 in
the United States, there were an estimated 225,000 people with AIDS and between
650,000 and 900,000 individuals in the United States were believed to be
infected with HIV. While fewer people are dying of AIDS, new cases of AIDS and
HIV are still increasing and people are now living longer with both AIDS and
HIV. Sources indicate that, of the combined HIV and AIDS population in the
United States, approximately 20% to 40% suffer from diarrhea at any given time,
with an average duration of 90 days per year. Although protease inhibitors and
highly active antiretroviral therapy have improved the prognosis for people
living with HIV and AIDS, the problem of diarrhea persists. In the majority of
cases the symptom is thought to be drug-related. Diarrhea therefore remains a
serious problem that has not been adequately addressed.

     Diarrhea not only compromises the health and quality of life of
individuals with AIDS and HIV but also has been shown to increase dramatically
the cost of these individuals' medical care. Furthermore, people with chronic
diarrhea are forced to restrict their daily activities to accommodate the
disruptions caused by this condition because current symptomatic therapies
provide either poor relief or undesirable side-effects.

     We believe that a product that prevents water loss and normalizes bowel
function, while positively impacts health and quality of life and reduces the
cost of health care represents a large,focused,  and untapped market
opportunity. We believe that the competitive promotional response may be limited
in this discrete market because no specific dietary supplements or
over-the-counter antidiarrheals have targeted this population to date, likely
because there are no indication or studies in this patient population. Further,
we hope eventually to build a niche market position by catering specifically to
the needs of the HIV/AIDS Community with a full product line.

     For the  traveler's  market,  SB-300  provides  a  natural  alternative  to
currently available treatments which have unpleasant side effects.  More than 35
million  individuals  travel  annually  to  countries  that  present the risk of
traveler's diarrhea.

     Potential Partners

     We are actively engaged in partnering discussions with top tier companies
in both the mass market and multi-level dietary supplement arenas. No agreements
have been reached or entered into to date. We expect to close deals in the
multi-level market arena first, with a large mass market, heavily promotional,
co-branding healthcare deal requiring several months of negotiation.

     Mass Market

     The entrance of large healthcare and consumer products companies into the
dietary supplement industry has fueled the expanded placement of botanical
dietary supplements beyond local health food stores and into neighborhood
grocery stores, drug stores and mass merchandisers. To promote this placement,
these companies are spending huge sums on advertising and promotion relative to
previous marketing budgets for dietary supplements that rarely topped $1
million. For example, in 1998, American Home Products Corporation spent an
estimated $12 million on its Centrum(R) line, Bayer Corporation spent an
estimated $35 million on its One-A-Day(R) line of eight products, and
Warner-Lambert Company spent an estimated $15 million on its Quanterra(R) line
of two products. Such large promotional expenditures are relatively recent
because historically sales of single products or even lines of products rarely
passed the single-digit million mark. However, industry analysts now report much
higher sales figures. For example, American Home Products, Bayer and
Warner-Lambert are forecasting combined first year sales of over $100 million
for their botanical lines, largely a result of significant promotion. Through
increased promotional budgets, companies such as these are educating more
consumers about the benefits of herbal and botanical products, thereby
increasing consumer trial and repurchase. If these trends continue, the growth
of the botanical dietary supplement market could far surpass growth in the past.
Each of these product lines is simply a new opportunity of commodity botanical
products.

     We believe that another key driver of continued growth will be the
introduction of new botanical dietary supplement products. Introduction of new
products has in the past not only brought new consumers into the market but also
fueled the purchase of other existing botanicals. The large healthcare and
consumer products companies are currently tapping into the commonly known
commodity botanical products, primarily of European origin. Once growth of these
products is maximized, novel proprietary products will be needed, and we believe
we are uniquely positioned to meet this need in certain market areas.



                                       34
<PAGE>

     We plan to partner with mass market companies in order to expand the
advertising and promotion of our botanical dietary supplement products. Such a
partnership would combine the benefits of our new products with the partner's
ability to generate large advertising and public relations campaigns for our new
product lines, similar to those created for existing consumer product lines. In
addition, we could pursue a licensing arrangement, such as that completed
between PharmaPrint, Inc. and American Home Products, in which the Shaman name
could be co-branded with a product or product line with a partner.

     Multi-Level

     Multi-level marketing, or "MLM," is a system of network marketing
comprised of two components: one-on-one selling and yearly sales conventions.
Distributors, usually individuals looking for a home-based business or the
opportunity to supplement their regular income, sell products to friends and
relatives. Distributors are incentivized to sign-up their friends as
distributors, and they receive in return an incentive for all the sales in their
network. Hence, the impact is that of an ever-growing customer base that is
somewhat captive and more predisposed to purchase than the broad consumer
public. In addition, this type of selling makes the emotional impact of product
stories very important, as distributors need to believe in the products they are
selling to friends.

     The primary form of promotion in the MLM channel, beyond one-on-one
selling, is the yearly sales convention. Each year, all distributors are brought
together for a multi-million dollar sales convention. On-stage presentations are
given on four to five key new products, or a product line, being launched in the
coming year. The history of the products, testimonials and their uses are
discussed. Then, distributors are sent back to their homes for another year of
selling. During the year, incentives may be given for reaching certain sales
quotas on a particular product or product line.

     Dietary supplements have been a mainstay of the MLM industry. However,
botanicals are a newer player on the scene. Some multi-level firms such as AmWay
Corporation, with its NutriLite line, and Nu Skin Enterprises, Inc. have
embraced the commonly used commodity botanicals. However, it is new products
that fuel the growth in MLM.

     Our botanical products lend themselves to this market for several reasons.
We have truly novel products--the lifeblood of this distribution channel.
Further, the origins of our products are unique and lend themselves to the type
of interesting and emotionally compelling selling stories required for
peer-to-peer selling. These would make for entertaining sales convention
presentations, featuring famous ethnobotanists and the rainforest. Additionally,
our reciprocity and conservation policies provide interesting content for
responsible and compelling story-based selling.

     Internet

     We believe there will be interest from potential Internet partners, both
in the natural products and broad drugstore categories, to work with Shaman to
introduce our novel products on their sites. These novel products provide a
reason to draw traffic to these sites. For drugstore sites offering
pharmaceuticals, a product like SB-300 which addresses the side effect of
diarrhea, which appears as a side effect in the labeling of over 80% of
pharmaceuticals, provides a natural link between these products causing the
problem and, SB-300, a potential solution. Finally, the Internet offers an
opportunity to supply DSHEA-allowed distribution of third-party literature and
product information at the click of a mouse online. This is much more accessible
than providing hard copy literature in the traditional retail environment.

Competition

     Competition in the botanical dietary supplement market differs by channel
of distribution. Historically, competition within the health food channel was
fragmented and made up of over 200 small, mostly privately held companies. More
recently, several large consumer healthcare companies have opened up the
mass-market channel, including American Home Products with its Centrum(R) Herbal
brand, Bayer's introduction of botanical ingredients in their One-A-Day(R) line,
and Warner-Lambert's introduction of their Quanterra(R) brand. Overall, the
entrance of these companies is expected to broaden consumer acceptance of
botanical products and grow the total botanical dietary supplement market, with
the mass market becoming the largest, fastest-growing distribution channel. In
order to enter this key channel, we intend to partner with a company with direct
to consumer promotional capabilities and extensive experience in this market. We
believe that a partner in this channel will value the quality and scientific
rigor behind our products.

     In the multi-level marketing channel, key players include Shaklee
Corporation, Nu Skin Enterprises, Inc., USANA, Inc. and Rexall Showcase
International. Again, we intend to partner with a top-tier company in this
channel. We believe that partners in this channel will appreciate the novel
products we have to offer and the compelling stories of their rainforest and
traditional use origins.



                                       35
<PAGE>

     There is currently no established leader in marketing dietary supplements
through the Internet, although several Internet sites do exist, including
AllHerb.com, Mothernature.com, and Greentree.com. The emerging "drugstore "
sites such as Drugstore.com and PlanetRx.com also carry some dietary
supplements. We intend to start our own website within this distribution
channel, with the unique attraction of our own, novel products available on the
site, particularly targeting the HIV/AIDS Community. We have reserved the
Internet domain name "ShamanBotanicals.com." We do not expect to compete
head-to-head with the existing Internet sites, where there has been little
differentiation between sites with respect to product offerings. Rather,
ShamanBotanicals.com will focus first on the needs of the HIV/AIDS Community,
including information and nutritional products particularly important for people
with diarrhea and other associated problems. The design of our website will be
integral to the launch and sale of our first product, SB-300, for diarrhea in
people with HIV/AIDS via the Internet distribution channel. We are also
evaluating partnerships in this distribution channel for the commercialization
of SB-300 for the traveler's diarrhea market.

Government Regulation

     The term "botanical dietary supplement" is defined by the 1994 Dietary
Supplement Health and Education Act as "an herb or other botanical or a
concentrate, constituent, extract or combination of any botanical that is
intended for ingestion as a tablet, capsule, or in liquid form and is not
represented for use as a conventional food or as a sole item of a meal or the
diet and is labeled as a dietary supplement." The 1994 Dietary Supplement Health
and Education Act specifically outlines how botanical products are to be
regulated and treated. Some commonly known commodity botanical dietary
supplement products include ginseng, gingko biloba, St. John's wort, and
echinacea. This statutory definition also differentiates botanical dietary
supplements, vitamins and minerals from conventional foods or food additives.
Under the law, botanicals may be sold as dietary supplements with claims as to
their effect on the structure or function of the human body, providing the
seller has adequate documentation for the claims. Botanical dietary supplements
are regulated by the FDA. However, some botanical dietary supplement products
require no review or approval to enter the market, while some new products may
require the submission of basic safety data prior to marketing. As a result, the
FDA regulatory process in the botanical dietary supplement industry is much less
rigorous than in the pharmaceutical industry, allowing for much faster market
introduction.

     One of the unique provisions of DSHEA is the distinction between new
dietary ingredients and old dietary ingredients, which had a history of being
marketed in the United States prior to DSHEA. Old dietary ingredients have been
"grand-fathered" under the law, allowing them to be commercialized without
further FDA review. Our pipeline includes more than 400 botanical candidates
that are old dietary ingredients, including several near-term product
candidates, and numerous new dietary ingredients candidates.

Pharmaceuticals

Background

     Pharmaceutical companies continually search for innovative products
available for in-license to enhance their existing product portfolios. Products
that have an entirely different approach or means of accomplishing the desired
therapeutic effect than products currently available are particularly in demand.
In addition, companies are looking to develop or in-license products that may be
more effective and/or less costly than those currently available, or those that
could offer an alternative to other, more invasive forms of medical treatment
and address the self-medication and quality of life issues of the current aging
consumer population.

Strategy

     Until recently, we were primarily focused on discovering and developing
novel pharmaceutical products for major human diseases by isolating and
optimizing active compounds found in tropical plants with a history of medicinal
use. We have conducted human clinical trials with our three lead product
candidates -- SP-303/Provir (Phase III/II), nikkomycin Z (Phase I) and SP-134101
(Phase I) -- targeting five indications. Due to unforeseen delays and costs
necessary to complete additional trials for our lead compound, SP-303/Provir for
the treatment of diarrhea in people with AIDS, we have chosen to discontinue all
pharmaceutical development, manufacturing and marketing activities. We now
intend to out-license worldwide marketing rights to our pharmaceutical assets.

Product Discovery and Development Process

     In our efforts to develop pharmaceutical products we previously focused on
drugs extracted from plants with a long history of medicinal use. Through this
process, we successfully identified and developed a number of pharmaceutical


                                       36
<PAGE>

candidates, particularly through the preclinical and early clinical stages.
These efforts have produced a portfolio of product candidates for out-license.

Product Candidates

     We conducted human clinical trials with our three leading product
candidates -- SP-303/Provir (Phase III/II), nikkomycin Z (Phase I), and
SP-134101 (Phase I) -- targeting five indications. We have discontinued all
pharmaceutical development, manufacturing and marketing activities and plan to
out-license all of the pharmaceutical applications of our technology.

     The following table describes the major therapeutic areas in which we have
had active product development and research. Efforts are being made to
out-license all of these pharmaceutical products:



<TABLE>
<CAPTION>

Product         Indication          Status                    Commercial Rights
- -------         ----------          ------                    -----------------
<S>             <C>                 <C>                       <C>
Provir          AIDS-associated     Completed Phase III       Shaman
                 diarrhea           study in Q4, 1998.
                                    Completed a Phase II
                                    efficacy study in Q4, 1997

Provir          Watery diarrhea     Completed two Phase II    Shaman
                                    efficacy trials in Q3,
                                    1998. Completed
                                    initial Phase II
                                    efficacy studies in
                                    1996 & 1997

Provir          Pediatric           Formulation to be         Shaman
                 diarrhea           developed

Nikkomycin Z    Endemic mycoses     Completed Phase I study   Shaman
                                    in Q2, 1997.

Nikkomycin Z    Azole-resistant     Initiation of clinical    Shaman
 and Azoles      Candida            program pending pre-
                                    clinical development
                                    by Pfizer

SP-134101       Type II Diabetes    Completed Phase I study   Shaman
                                    in Q1, 1998

Oral            Type II Diabetes    Preclinical,              Ono; Lipha/Merck;
 antihyperglycemic                  29 compounds              and Shaman. Shaman
 compounds                                                    receives royalties
                                                              on sales outside
                                                              the U.S. and
                                                              profit sharing in
                                                              the U.S.

</TABLE>

Sales and Marketing

     We intend to out-license worldwide marketing rights to our pharmaceutical
assets. See "Risk Factors--Dependence on Collaborative Relationships."

Customers and Partners

     We continue to pursue discussions for the out-licensing of our
pharmaceutical assets.

     In September 1996, we entered into a five-year collaborative agreement
with Lipha/Merck to develop jointly our antihyperglycemic drugs. We are
currently in negotiations with Lipha/Merck for the discontinuation of this
research agreement. Lipha/Merck will make no further research payments. It is
not clear whether there would be any continuation of payment for milestone
payments or royalties, for the compounds that have already been discovered if
any of these product candidates continue into development and clinical trials,
or commercialization, based on Lipha/Merck's efforts. We are in discussions with
Lipha/Merck regarding the dissolution of this relationship.

     In May 1995, we entered into a collaborative agreement with Ono
Pharmaceutical Co. Ltd. providing for, among other things, three years of
funding for the research and development of compounds for the treatment of Type
II diabetes. Although the on-going research funding period under such agreement
has expired, Ono continues to have contractual obligations to us for the
potential payment of milestones and royalties. There can be no assurance that
such milestones will be attained or that we will receive any future milestone
payments or royalties from Ono.



                                       37
<PAGE>

Competition

     The out-licensing of pharmaceuticals is a competitive enterprise. Although
many companies consider licensing opportunities, they often investigate multiple
opportunities before settling on a select few. While Shaman is subject to this
competition, we have had significant interest in our products based upon their
novelty, safety, efficacy, and advanced stages of development. We are actively
seeking to out-license our products and we have multiple on-going discussions.
To date, these discussions have not resulted in any out-licensing agreements.
See "Risk Factors Dependence on Collaborative Relationships."

Patents and Proprietary Rights

     Proprietary protection for our product candidates, processes and know-how
is important to our business. Our policy is to file patent applications to
protect technology, inventions and improvements that are considered commercially
important to the development of our business. We also rely upon trade secrets,
know-how and continuing technological innovation to develop and maintain our
competitive position. We aggressively prosecute and defend our patents and
proprietary technology.

     We have 20 U.S. patents issued to date. In addition, we currently have 12
U.S. patent applications pending with the U.S. Patent and Trademark Office and
multiple applications filed under the Patent Cooperation Treaty. We do not know
whether any of these applications will result in the issuance of any patents or,
if any patents are issued, whether any issued patent will provide significant
proprietary protection or will be circumvented or invalidated.

     We have been issued a U.S. patent related to our specific proanthocyanidin
polymer compositions designated SP-303/Provir. Specifically, the patent contains
composition of matter claims related to SP-303/Provir contained in our
SP-303/Provir product. We have also filed foreign applications corresponding to
our issued U.S. patents relating to our proanthocyanidin polymer composition. We
have been granted patents in Australia, Mexico and New Zealand and have patent
applications pending in Canada, Europe, Japan, the Republic of Korea and
Singapore.

     We have also filed a U.S. patent application directed to new formulations
and methods of using our specific proanthocyanidin polymer composition for
treatment of watery diarrhea. These formulations are contained in our
SP-303/Provir product.

     We have 10 issued U.S. patents relating to compositions and methods for
treating Type II diabetes, as well as reducing hyperglycemia associated with
other etiologies. We also have eight additional U.S. patent applications pending
that relate to compositions and methods for treating Type II diabetes, as well
as reducing hyperglycemia associated with other etiologies. We have filed 11
foreign applications, i.e., international applications under the Patent
Cooperation Treaty designating a number of foreign countries, as well as
applications in Taiwan, corresponding to eleven U.S. applications and plan to
file additional corresponding foreign applications within the relevant
convention periods.

     We also have one issued U.S. patent and corresponding international patent
applications in a number of foreign countries relating to methods for
administering and sustained release formulations for anti-fungal agents like
nikkomycin Z. The methods and compositions are useful for treatment of fungal
infections, particularly candidiasis, the most frequently encountered
life-threatening mycoses. We have licensed several patents from Bayer AG
relating to the use of nikkomycin Z and the composition and use of nikkomycin Z
in combination with other antifungal compounds for the development of antifungal
agents.

     There can be no assurance that our pending patent applications will result
in patents being issued or that, if issued, patents will afford protection
against competitors with similar technology; nor can there be any assurance that
others will not obtain patents that we would need to license or circumvent. See
"Risk Factors--Uncertainty Regarding Patents and Proprietary Rights; Current
Legal Proceedings Regarding Patents and Proprietary Rights."

Community Commitment

The Healing Forest Conservancy

     In January 1990, we formed The Healing Forest Conservancy, a California
not-for-profit public benefit corporation which is dedicated to maintaining
global biocultural diversity. The Conservancy focuses on conserving plants that
have been used traditionally for medicinal and health purposes and conserving
the knowledge of cultures that utilize them. We have donated 667 shares of our
common stock to the Conservancy's endowment fund. We also plan to donate
additional funds when we have achieved profits from product sales, if any, to
provide benefits to indigenous peoples in the countries where our source plants
are obtained.



                                       38
<PAGE>

The Shaman HIV Investment Trust

     In 1998, we made a commitment to create the Shaman HIV Investment Trust,
which provides funding for charitable causes within the HIV/AIDS Community,
including services, education and research. We have committed to the Trust a
royalty on the first five years of U.S. product net sales of SB-300 which are
sold in the HIV/AIDS market. The Trust will be administered independently by a
committee of HIV/AIDS Community leaders.

Employees

     In February 1999, we ceased operations in our pharmaceuticals business and
downsized by approximately 60 employees, or 65% of our workforce, as well as an
additional 12 employees who assisted in closing down the pharmaceutical
business. As of April 30, 1999, we had 26 employees. The remaining employees are
expected to remain at Shaman and will primarily focus their activities on the
botanicals business.

Legal Proceedings

     We have entered into arbitration against Dr. Michael Tempesta with respect
to a February 1990 license agreement. With the exception of the patent
opposition proceeding in Europe and the arbitration against Dr. Tempesta, we are
not a party to any other material legal proceedings. See "Risk Factors--The
failure to protect our intellectual property rights could adversely impact our
business."


                                       39
<PAGE>


                               MANAGEMENT


Executive Officers and Directors

     The following table sets forth certain information with respect to the
executive officers, directors and key employees of Shaman as of May 3, 1999:

<TABLE>
<CAPTION>
         Name                 Age                   Position
- -------------------------     ---    -------------------------------------------
<S>                           <C>     <C>
Lisa A. Conte............     40     Director, President, Chief Executive Officer, and Chief Financial Officer

Steven R. King, Ph.D.....     41     Senior Vice President, Ethnobotany and Conservation

Gerald M. Reaven, M.D....     70     Senior Vice President, Medical and Clinical Advisor

Thomas Carlson, M.D......     42     Vice President, Medical Ethnobotany

John W.S. Chow, Ph.D.....     47     Vice President, Technical Operations

J.D. Haldeman............     34     Vice President, Commercial Development

G. Kirk Raab (1).........     63     Chairman of the Board

Loren D. Israelsen.......     43     Director and Interim Chief Executive Officer of ShamanBotanicals.com

Adrian D.P. Bellamy (2)..     57     Director

Jeffrey Berg.............     51     Director

Herbert H. McDade, Jr....     72     Director

M. David Titus (1).......     41     Director


</TABLE>
- --------------------------


 (1)   Member of the Audit Committee
 (2)   Member of the Compensation Committee

     Lisa A. Conte founded Shaman in May 1989 and currently serves as Shaman's
President, Chief Executive Officer, Chief Financial Officer, and Director. From
1987 to 1989, Ms. Conte was Vice President at Technology Funding, Inc., a
venture capital firm, where she was responsible for the analysis and management
of healthcare industry investments. From 1985 to 1987, she conducted risk and
strategy audits for venture capital portfolio companies at Strategic Decisions
Group, a management consulting firm. Ms. Conte received an A.B. in Biochemistry
from Dartmouth College, an M.S. in Physiology/Pharmacology from the University
of California, San Diego and an M.B.A. from The Amos Tuck School, Dartmouth
College.

     Steven R. King, Ph.D. joined Shaman in March 1990. He currently serves as
Senior Vice President, Ethnobotany and Conservation and is responsible for
coordinating our Scientific Strategy Team. From 1989 to 1990, Dr. King was the
chief botanist for Latin America at Arlington, Virginia's Nature Conservancy. He
worked in 1988 as Research Associate for the Committee on Managing Global
Genetic Resources at the National Academy of Sciences, and was a Doctoral Fellow
from 1983 to 1988 at The New York Botanical Garden's Institute of Economic
Botany. Dr. King received a B.A. in Human Ecology from the College of the
Atlantic and M.S. and Ph.D. degrees in Biology from City University of New York.

     Gerald M. Reaven, M.D. joined Shaman as a consultant in February 1995 and
became an employee in July 1995. He currently serves as Senior Vice President,
Medical and Clinical Advisor. Dr. Reaven came to Shaman from the Stanford
University School of Medicine where he served as a faculty member since 1960 and
a Professor of Medicine since 1970. Over the last 20 years, Dr. Reaven served as
head of the Division of Endocrinology and Metabolic Diseases, Division of
Gerontology and director of the General Clinical Research Center. Dr. Reaven
also served as head of the Division of Endocrinology, Gerontology and Metabolism
at Stanford University School of Medicine, and Director of the Geriatric
Research, Education and Clinical Center, at the Palo Alto Veterans Affairs
Medical Center. Dr. Reaven received his A.B., B.S. and M.D. from the University
of Chicago.

     Thomas Carlson, M.D. joined Shaman in October 1992. He currently serves as
Vice President, Medical Ethnobotany and is responsible for developing
ethnobotancial field research and coordinating clinical studies. Dr. Carlson has
conducted research with traditional healers in over 40 different ethnolinguistic
groups in 15 different tropical countries. Prior to joining Shaman, from 1990 to
1992, Dr. Carson practiced General Pediatrics at Kaiser Permanente in Santa
Clara, California and worked at the Aravind Childrens and Eye Hospitals in
Madurai, India on child malnutrition and blindness. From 1987 to 1990, Dr.
Carlson completed his Internship and Residence in Pediatrics at Stanford
University Medical Center. Dr. Carlson received his M.D. from Michigan State
University and a B.S. and M.S. in Botany from the University of Michigan.

     John Chow joined Shaman in April 1998 as Vice President of Technical
Operations. Prior to joining Shaman, from December 1997 to April 1998, Dr. Chow
served as Director, Product and Technology Evaluation at Bristol-Myers Squibb


                                       40
<PAGE>

Company, where he performed technical due diligence toward the acquisition and
licensing of various dosage forms and technologies and reviewed and approved new
product specifications. Prior to holding this position, from July 1980 to
December 1997, Dr. Chow held other positions, also with Bristol-Myers Squibb
Company, where he was responsible for developing strategies for manufacturing
consolidation, facilitating technology transfers of new and existing products,
and directing technical operations of an international plant. Dr. Chow received
a B.S. in Pharmacy from Washington State University, a Ph.D. in Pharmaceutical
Chemistry from Ohio State University and an M.B.A. in Pharmaceutical/Chemical
Studies from Fairleigh Dickinson University.

     J.D. Haldeman joined Shaman in July 1997 as Vice President, Commercial
Development. Prior to joining Shaman, from April 1988 to June 1997, Ms. Haldeman
served in various positions at Warner-Lambert/Parke-Davis Pharmaceuticals most
recently as Senior Director, Cardiovascular Marketing from October 1995 to June
1997. Prior to that, she served as Director, Customer Marketing -- West Business
Unit; Product Manager, Epilepsy Team; Associate Product Manager, Global
Cardiovascular Product Planning; and Sales Specialist for
Warner-Lambert/Parke-Davis Pharmaceuticals. Ms. Haldeman received her B.A. from
Brigham Young University and her Masters of Management from the J.L. Kellogg
Graduate School of Management, Northwestern University.

     G. Kirk Raab became a director in January 1992 and Chairman of the Board in
September 1995. Mr. Raab was President, Chief Executive Officer and director of
Genentech, Inc. from February 1990 to July 1995 and President, Chief Operating
Officer and director from February 1985 to January 1990. Before joining
Genentech, Mr. Raab was associated with Abbott Laboratories, serving as
President, Chief Operating Officer and director. Mr. Raab is also Chairman of
the Board of Connectics, Inc., Oxford GlycoSciences (UK) Ltd. and LXR
Biotechnology, Inc., and is a director of Bridge Medical, Inc., Accumetrics,
Inc. and Applied Imaging Corporation. Mr. Raab holds a B.A. in Political Science
from Colgate University.

     Loren D. Israelsen became a director in April 1999 and the Interim Chief
Executive Officer of our ShamanBotanicals.com division in January 1999. Mr.
Israelsen has been President of LDI Group, a consulting firm specializing in
dietary supplement and phytomedicine issues, since 1997. From 1990 to 1997, Mr.
Israelsen practiced law at a private firm. From 1981 to 1990, Mr. Israelsen
served in various positions at Murdock International Corporation, including
President from 1989 to 1990, Vice President of Strategic Development from 1986
to 1989 and General Counsel from 1981 to 1986. While acting as Vice President of
Strategic Development, he identified and negotiated several license agreements
to bring the world's leading phytomedicines, including Ginkgo biloba extract,
milk thistle extract, echinacea, evening primrose oil, and saw palmetto extract,
to the United States. Mr. Israelsen has served as General Counsel/Vice President
to the American Herbal Products Association, Co-counsel to the European American
Phytomedicine Coalition, industry liaison to FDA's expert advisory committee on
Ephedra and advisor to the Natural Products Quality Assurance Alliance, the
Office of Technology Assessment and the Office of Dietary Supplements. Since
1992, he has served as Executive Director of the Utah Natural Products Alliance,
which was instrumental in developing and passing the Dietary Supplement Health
and Education Act of 1994.

     Adrian D.P. Bellamy became a director in October 1997. Since April 1995,
Mr. Bellamy has served as Chairman and a director of each of Airport Group
International Holdings, L.L.C. and Gucci Group N.V. From September 1983 to April
1995, Mr. Bellamy served as Chairman of the Board of Directors and Chief
Executive Officer of DFS Group Limited, a specialty retailer. He received a B.A.
in Communications and an M.B.A. from the University of South Africa. Mr. Bellamy
is a director of The Body Shop, Inc., The Body Shop International PLC, The Gap,
Inc., Paragon Trade Brands, Inc. and Williams-Sonoma, Inc.

     Jeffrey Berg became a director in June 1998. Mr. Berg has been the Chairman
and Chief Executive Officer of International Creative Management, Inc. since
1985. Mr. Berg, one of the leading agents in the entertainment industry, has
been in the entertainment industry for over 25 years. Mr. Berg received a B.A.
from the University of California at Berkeley and a Master of Liberal Arts from
the University of Southern California. He served as Co-Chair of the California
Information Technology Council and is a director of each of Oracle Corporation
and Excite, Inc.

     Herbert H. McDade, Jr. became a director in October 1991. He has served as
Chairman of the Board and Chief Executive Officer of Chemex, Pharmaceuticals,
Inc. since February 1989 and as Chief Executive Officer from February 1989
through January 1996, when Chemex Pharmaceuticals merged with Access
Pharmaceutical Corporation and the combined entity changed its name to Access
Pharmaceutical Corporation Inc. From October 1986 to January 1988, Mr. McDade
was Chairman, President and Chief Executive Officer of Armour Pharmaceuticals,
Inc., after previously serving as President, International Health Care Division
of the Revlon Health Care Group. Mr. McDade holds a B.S. in Biology from the
University of Notre Dame and a B.P.H. in Theology and Philosophy from Laval
University. He is Chairman of the Board of Access Pharmaceutical Corporation and
a director of Cytrx, Inc., Discovery Ltd. and several privately held companies.



                                       41
<PAGE>

     Mr. David Titus became a director in April 1990. Mr. Titus is currently a
General Partner of Windward Ventures Management, L.P., a venture capital firm,
which he founded in November 1997. Prior to founding Windward Ventures
Management, L.P., Mr. Titus was Managing Director of Windward Ventures, a
venture capital consulting and investment firm, which he founded in 1993. From
May 1986 to December 1992, he served in various capacities at Technology
Funding, Inc., a venture capital firm, including Group Vice President,
Technology Funding, Inc., and General Partner of Technology Funding Limited.
Prior to joining Technology Funding, Inc. in May 1986, Mr. Titus was a founder
and Senior Vice President of the Technology Division of Silicon Valley Bank. Mr.
Titus earned a B.A. in Economics from the University of California, Santa
Barbara. He is a director of several privately held companies.

Number of Directors; Relationships

     Our bylaws authorize the board to fix the number of directors serving on
the board, provided that such number shall not be less than five nor more than
nine. The number of directors is currently fixed at seven. All directors hold
office until the second annual meeting of stockholders following the annual
meeting of stockholders at which such director was elected, or until their
successors have been duly elected and qualified.

There are no family relationships among our executive officers or directors.

Committees of the Board of Directors

     Shaman's board of directors has an audit committee which is primarily
responsible for annually recommending independent auditors for appointment by
the board, for reviewing the services performed by our independent auditors and
reviewing reports submitted by the independent auditors. The audit committee
includes two directors, Messrs. Titus and Raab.

     The board also has a compensation committee, which is comprised of Messrs.
McDade and Bellamy. The compensation committee reviews and approves our general
compensation policies and practices, sets compensation levels for our executive
officers and administers our 1992 Stock Option Plan and other employee benefits
programs.

Director Compensation

     Each non-employee director receives an annual retainer fee of $10,000,
provided the non-employee director attends at least 75% of the board meetings.
In addition, non-employee directors are reimbursed for reasonable expenses
incurred in connection with their attendance at such meetings.

     The information given below is for historical purposes because each member
of the board of directors has agreed to surrender their outstanding options to
purchase shares of our common stock.

     Shaman's non-employee directors receive stock options under our 1992 Stock
Option Plan. See "1992 Stock Option Plan."

     On June 30, 1998, Mr. Berg received an option to purchase 1,000 shares of
common stock in connection with his initial appointment to the board pursuant to
the automatic grant provision of the 1992 Stock Option Plan. The option has an
exercise price of $67.50 per share, the fair market value per share of the
common stock on the grant date. Mr. Berg has agreed to surrender these options.

     On May 15, 1998, Messrs. McDade, Raab, Titus and Bellamy each received an
option grant for 375 shares of common stock under the automatic option grant
provisions of the 1992 Stock Option Plan. These options have an exercise price
per share of $98.75, the fair market value per share of common stock on that
date. Each of these directors has agreed to surrender these options.

     On October 20, 1998, the compensation committee, as administrator of the
1992 Stock Option Plan, implemented an option cancellation/regrant program for
certain key consultants and non-employee directors (other than the members of
the compensation committee) holding options under the plan. Pursuant to this
program, each eligible non-employee director was given the opportunity to
surrender his outstanding options under the 1992 Stock Option Plan with exercise
prices in excess of $28.75 per share in return for a new option grant for the
same number of shares but with an exercise price of $28.75 per share, the
closing selling price per share of common stock as reported on the Nasdaq
National Market on the October 20, 1998 grant date of the new option. To the
extent the higher-priced option was exercisable for any option shares on the
October 20, 1998 cancellation date, the new option granted in replacement of
that option would become exercisable for those shares in a series of 12


                                       42
<PAGE>

successive equal monthly installments upon the optionee's completion of each
month of service over the one-year period measured from the October 20, 1998
grant date. The option would become exercisable for the remaining option shares
in one or more installments over the optionee's period of continued service,
with each such installment to vest on the same vesting date in effect for that
installment under the cancelled higher-priced option. The following non-employee
directors participated in the October 20, 1998 cancellation/regrant program with
respect to the indicated number of option shares: Mr. Raab, 17,214 shares with a
weighted average exercise price of $110.56 per share; Mr. Titus, 2,914 shares
with a weighted average exercise price of $128.48 per share; Mr. Berg, 1,000
shares with a weighted average exercise price of $67.50 per share. Each of these
directors has agreed to surrender such options.

     On May 1, 1997, the board of directors approved a consulting arrangement
with Mr. Titus, one of its non-employee directors pursuant to which he is to
serve as a consultant to Shaman on financing matters and financial operations.
Under this arrangement, Mr. Titus was paid consulting fees in the amount of
$36,000 for the 1998 fiscal year. This arrangement expired in June 1998. As part
of his initial consulting arrangement, Mr. Titus was granted an option to
purchase up to 700 shares of common stock under the discretionary option grant
program in effect under the 1992 Stock Option Plan. Such option has an exercise
price of $107.50 per share, the fair market value of our common stock on the May
22, 1997 grant date of that option and is exercisable in full at any time prior
to May 22, 2007. This option was surrendered on October 20, 1998 under the
option cancellation/regrant program, in return for a new option grant for the
same number of shares but with an exercise price of $28.75 per share. The option
would have become exercisable in a series of 12 successive equal monthly
installments over the one-year period measured from the October 20, 1998 grant
date, however, Mr. Titus has agreed to surrender this option.

     In August 1995, we entered into a consulting arrangement with Mr. G. Kirk
Raab, Chairman of the Board. As consideration for special consulting services
Mr. Raab performed under the consulting arrangement, Mr. Raab was paid an annual
consulting fee of $100,000. In addition, he was granted an option for 10,000
shares of common stock on August 21, 1995 with an exercise price per share of
$110.00, the fair market value per share of common stock on that date. The
option was granted under the discretionary option grant provision of the 1992
Stock Option Plan, and the option would have become exercisable in a series of
48 successive equal monthly installments over the four-year period measured from
the August 21, 1995 grant date, provided Mr. Raab continued to render services
to us pursuant to his consulting arrangement. This option was surrendered on
October 20, 1998 under the option cancellation/regrant program, in return for a
new option grant for the same number of shares but with an exercise price of
$28.75 per share. Mr. Raab has agreed to surrender this replacement option. In
addition, in connection with his services as a director and as Chairman of the
Board, Mr. Raab received an annual retainer fee of $60,000, payable after each
annual meeting of stockholders so long as Mr. Raab continued to render services
to us as Chairman of the Board. We paid a total of $66,667 of the consulting
fees in cash and on November 7, 1998, issued 6,783 shares of common stock in
payment of his consulting services for the 1998 fiscal year. Shaman and Mr. Raab
have agreed to terminate the compensation component of his consulting
arrangement and no further payments are to be due under this arrangement. Mr.
Raab still serves as Chairman of the Board.

     In January 1999, we entered into a consulting agreement with Mr. Loren D.
Israelsen, a director and officer, pursuant to which he serves as interim Chief
Executive Officer of our ShamanBotanicals.com division. Under this agreement,
Mr. Israelsen was paid a total of $30,000 for his services in January and
February 1999. In addition, upon further funding of Shaman, Mr. Israelsen is to
be paid $10,000 in deferred consulting expenses and an additional $150,000
project retainer to help close a corporate deal for the ShamanBotanicals.com
division. Such retainer will be paid in three installments during the third
quarter of 1999. Mr. Israelsen will also receive a success payment for each
corporate partnership as a percentage of the up front fee received from such
partner, which fee varies from three to five percent depending upon the timing
of closing such partnership.

Compensation Committee Interlocks and Insider Participation

     During the 1998 fiscal year, Herbert H. McDade and Adrian D.P. Bellamy
served as members of the compensation committee of the board of directors. No
member of the compensation committee was, at any time during the 1998 fiscal
year or at any earlier time, an officer or employee of Shaman.

     No executive officer of Shaman serves as a member of the board of
directors or compensation committee of any entity which has one or more
executive officers serving as a member of the company's board of directors or
compensation committee.

Executive Compensation

     The following table sets forth the compensation earned, for services
rendered in all capacities to us, for each of the last three fiscal years by (i)
Shaman's Chief Executive Officer and (ii) the four other highest paid executive
officers serving as such at the end of the 1998 fiscal year whose salary and
bonus for that fiscal year was in excess of $100,000. The individuals named in


                                       43
<PAGE>

the table will be referred to in this prospectus as the Named Officers. No other
executive officer who would otherwise have been included in such table on the
basis of fiscal year 1998 salary and bonus resigned or terminated employment
during the year.


<TABLE>
                           SUMMARY COMPENSATION TABLE
<CAPTION>
                                                            Long-Term
                              Annual Compensation          Compensation
                         --------------------------------- ------------
                                                               Awards
                                                              ---------
                         ----------------------------------------------
                                                 Other     Securities
   Name and                                      Annual    Underlying  All Other
   Principal               Salary                Compen-    Options/    Compen-
   Position       Year     ($)(1)    Bonus ($)   sation($)   SARS (#)  sation($)
- ----------------- ----   ----------  ---------  ----------  ---------  ---------
<S>               <C>    <C>         <C>        <C>         <C>        <C>

Lisa A. Conte     1998   311,537(2)    3,000(3)        --    102,250(4)    --
  President,      1997   312,901(5)   91,689(6)        --     14,750(4)    --
  Chief           1996   286,190(7)   53,000(8)        --      5,250(4)    --
  Executive
  Officer and
  Chief
  Financial
  Officer

Gerald M.         1998    243,015      3,000(3)       --        10,750     --
Reaven, M.D.      1997    239,114     25,000(9)       --          --       --
  Senior Vice     1996    227,878      3,000          --         250       --
  President,
  Medical and
  Clinical
  Advisor

Atul S.           1998    177,474      3,000(3)  125,531(11)   2,000  66,356(12)
Khandwala,        1997    226,031     20,000(9)       --          --  82,217(13)
Ph.D. (10)        1996    187,563      3,000      51,200(14)   6,250 106,399(15)
  Former
  Senior Vice
  President,
  Development
  and Chief
  Regulatory
  Officer

Steven R. King,   1998    179,329      3,000(3)       --       7,440       --
Ph.D.             1997    176,202     40,000(9)       --          --       --
  Senior Vice     1996    171,822      3,000          --       2,750       --
  President,
  Ethnobotany
  and
  Conservation

James E.          1998    257,544      3,000(3)       --       6,250       --
Pennington,       1997     58,490     70,000(17)      --       6,250       --
M.D. (16)         1996         --         --          --          --       --
  Former
  Senior Vice
  President,
  Clinical
  Research and
  Chief Medical
  Officer

Laurie
Peltier(18),      1998    152,654      3,000(3)       --       3,250  25,000(19)
Vice President,   1997     87,674     20,000(20)      --       2,750  19,223(21)
  Project         1996         --         --          --          --      --
  Coordination

</TABLE>

- ------------------
(1)   Includes  amounts  deferred under our Internal Revenue Code Section 401(k)
      Plan and Section 125 Plan.
(2)   Includes  $59,573 and $13,431  attributable to child care costs and family
      travel, respectively.
(3)   Represents  all employees  bonus paid in 1998 for  achievement of
      milestones in 1997.
(4)   Ms.  Conte has  agreed to  surrender  all of her  currently  held options.
(5)   Includes  $61,214 and $27,287  attributable to child care costs and family
      travel, respectively.
(6)   Includes  $75,000 paid in 1998 for  achievement  of milestones in 1997
(7)   Includes  $49,646 and $16,858  attributable to child care costs and family
      travel, respectively.
(8)   Includes  $50,000 paid in 1997 for  achievement  of milestones in 1996.
(9)   Represents  bonus paid in 1998 for  achievement  of milestones in 1997.
(10)  We accepted the resignation of Dr.  Khandwala  effective  October 2, 1998.
(11)  Represents amount paid in common stock for services rendered.
(12)  Includes $3,000 received as a housing subsidy, $2,018 for travel expenses
      and $61,338 for indebtedness for which repayment was forgiven.


                                       44
<PAGE>

(13)  Includes $16,500 received as a housing subsidy, $1,164 for travel expenses
      and $64,553 in indebtedness for which repayment was forgiven.
(14)  Represents fees received from consulting services.
(15)  Includes $13,445 received as a housing subsidy, $23,746 for mvoing and
      relocation expenses, $1,562 for travel expenses and $67,646 in
      indebtedness for which repayment was forgiven.
(16)  Dr. Pennington joined us in September 1997. In 1997, he earned $58,490,
      based on an annual salary of $255,000. Dr. Pennington was terminated
      effective February 19, 1999 due to the elimination of his position in
      connection with the our restructuring.
(17)  Includes $60,000 sign-on bonus and $10,000 bonus paid in 1998 for
      achievement of milestones in 1997.
(18)  Ms. Peltier joined us in June 1997. In 1997, she earned $87,674, based
      on an annual salary of $150,000.
(19)  Represents closing costs on the sale of Ms. Peltier's former residence.
(20)  Includes $10,000 sign-on bonus and $10,000 bonus paid in 1998 for
      achievement of milestones in 1997.
(21)  Represents moving and relocation expenses.

Stock Option and Stock Appreciation Rights under our 1992 Stock Option Plan

     The following table contains information concerning the grant of stock
options under our 1992 Stock Option Plan to the Named Officers during the 1998
fiscal year. Except for the limited stock appreciation right described in
footnote (2) below which formed part of the option grant made to each Named
Officer, no stock appreciation rights were granted to such Named Officers during
the 1998 fiscal year.

<TABLE>
                      OPTION/SAR GRANTS IN LAST FISCAL YEAR
<CAPTION>


                                                                     Potential Realizable Value at
                                                                  Assumed Annual Rates of  Stock Price
                   Individual Grants                                 Appreciation for Option Term (1)
- -------------------------------------------------------    ----------------------------------------------------
                                             % of Total
                             Number           Options
                             of               Granted
                             Securities          to
                             Underlying       Employees       Exercise
                             Options/SARs     in Fiscal        Price       Expiration
 Name(*)                     Granted(#)(2)       Year       ($/Share)(3)       Date          5%           10%
- ---------------------        -------------    ----------    ------------   ----------    ---------    ----------
<S>          <C>            <C>        <C>         <C>        <C>        <C>
Lisa A. Conte(4)                27,250          14.60%          25.62       09/17/08      $439,059    $1,112,663
                                75,000          40.19%          25.62       09/17/08     1,208,421     3,062,376

Gerald M. Reaven, M.D.          10,750           5.76%          25.62       09/17/08       173,207       438,941

Atul S. Khandwala, Ph.D. (5)     2,000           1.07%          28.75       10/19/08         4,211         8,535

Steven R. King, Ph.D.            7,440           3.99%          25.62       09/17/08       119,883       303,808

James Pennington, M.D. (6)       6,250           3.35%          25.62       09/17/08       100,702       255,198

Laurie Peltier                   2,750           1.47%          25.62       09/17/08        44,309       112,287
                                   500           0.27%          25.62       09/17/08         8,053        20,413

</TABLE>
- -----------------

(1)   Potential realizable value is based on assumption that the market price of
      the common stock appreciates at the annual rate shown (compounded
      annually) from the date of grant until the end of the 10-year option term.
      There can be no assurance that the actual stock price appreciation over
      the 10-year option term will be at the assumed 5% and 10% levels or at any
      other defined level. As of March 31, 1999, the exercise price of all
      options was significantly higher than the trading price of the stock on
      that date.
(2)   Each option has a maximum term of 10 years, subject to earlier termination
      in the event of the optionee's cessation of service with Shaman. Except
      for the options for 75,000 shares granted to Ms. Conte, 2,000 shares
      granted to Mr. Khandwala and 500 shares granted to Ms. Peltier, each
      option granted to the Named Officers in fiscal 1998 were part of the
      September 18,1998 cancellation/regrant program. Accordingly, to the extent
      the cancelled option for the same number of shares was exercisable for any


                                       45
<PAGE>

      of those shares on the September 18, 1998 cancellation date, the new
      option granted in replacement of that option will become exercisable for
      those shares in a series of 12 successive equal monthly installments upon
      his or her completion of each month of service over the one-year period
      measured from the September 18, 1998 grant date. The option will become
      exercisable for the remaining option shares in one or more installments
      over her period of continued service, with each such installment to vest
      on the same vesting date in effect for that installment under the
      cancelled option. The options for 75,000 shares to Ms. Conte and 500
      shares to Ms. Peltier will become exercisable for 12.5% of the option
      shares upon completion of 6 months of service measured from the grant
      date, and the balance of the option shares will become exercisable in a
      series of 42 successive equal monthly installments over the optionee's
      period of continued service thereafter. The option for 2,000 shares to Mr.
      Khandwala will become exercisable in a series of six successive equal
      monthly installments over the optionee's period of continued service
      thereafter. However, each of the options granted to the named executive
      officers will become immediately exercisable in full upon an acquisition
      of the company by merger or asset sale, unless the option is assumed by
      the successor entity. Each option includes a limited stock appreciation
      right which will result in the cancellation of that option, to the extent
      exercisable for vested shares, upon the successful completion of a hostile
      tender for securities possessing more than 50% of the combined voting
      power of our outstanding voting securities. In return for the cancelled
      option, the optionee will receive a cash distribution per cancelled option
      share equal to the excess of (i) the highest price paid per share of our
      common stock in such hostile tender offer over (ii) the exercise price
      payable per share under the cancelled option.
(3)   The exercise price may be paid in cash or in shares of common stock
      (valued at fair market value on the exercise date) or through a cashless
      exercise procedure involving a same-day sale of the purchased shares. We
      may also finance the option exercise by loaning the optionee sufficient
      funds to pay the exercise price for the purchased shares and the federal
      and state income tax liability incurred by the optionee in connection with
      such exercise. The optionee may be permitted, subject to the approval of
      the compensation committee, as administrator of the 1992 Stock Option
      Plan, to apply a portion of the shares purchased under the option (or to
      deliver existing shares of common stock) in satisfaction of such tax
      liability.
(4)   Ms. Conte has agreed to surrender all of her currently held options.
(5)   We accepted the resignation of Dr. Khandwala effective October 2, 1998.
(6)   Dr. Pennington was terminated effective February 19, 1999 due to the
      elimination of his position in connection with our restructuring.

Option Exercises and Holdings

     The following table provides information with respect to the Named
Officers concerning the exercise of options during the 1998 fiscal year and
unexercised options held as of December 31, 1998. No stock appreciation rights
were exercised during such fiscal year, and except for the limited stock
appreciation right described in footnote (2) to the Stock Option/SAR Grants
Table which forms part of each outstanding stock option, no stock appreciation
rights were outstanding at the end of that fiscal year.

<TABLE>
                                 AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                                           AND FY-END OPTION VALUES
<CAPTION>


                                            Value
                                           Realized                                 Value of Unexcercised
                                           (Market                                   In-the-Money Options
                                           price at                                   at FY-End (Market
                               Shares      exercise     No. of Securities              price of shares at
                              Acquired     date less  Underlying Unexcersied         FY-End less excercise
                                 on        exercise     Options FY-End (#)                 price) ($)(1)
         Name                 Exercise       price)  -----------------------------  ---------------------------
                                (#)         ($)(2)     Exercisable   Unexercisable  Exercisable   Unexercisable
- --------------------------   ----------   ----------  ------------   -------------  -----------   -------------
<S>          <C>     <C>    <C>         <C>           <C>          <C>
Lisa A. Conte(3)                 --           --          4,771          101,229      $130,961      $1,265,364

Gerald M. Reaven, M.D.           --           --          2,687            8,062       $33,594        $100,781

Atul S. Khandwala, Ph.D.(4)      --           --            667            1,333        $6,247         $12,493

Steven R. King, Ph.D.            --           --          2,075            5,648       $25,902         $70,598

James Pennington, M.D.(5)        --           --            781            5,469        $9,766         $68,359

Laurie Peltier                   --           --            281            2,969        $3,516         $37,106


</TABLE>


                                       46
<PAGE>

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

(1)   Based on the fair market value of our common stock on December 31, 1998 of
      $38.12 per share, the Nasdaq National Market trading price at the close of
      business that same day. As of March 31, 1999, these options had no value
      since the exercise price of all options was significantly higher than the
      trading price of the stock on that date.
(2)   Equal to the closing selling price of the purchased shares on the option
      exercise date less the exercise price paid for such shares.
(3)   Ms. Conte has agreed to surrender all of her currently held options.
(4)   We accepted the resignation of Dr. Khandwala effective October 2, 1998.
(5)   Dr. Pennington was terminated effective February 19, 1999 due to the
      elimination of his position in connection with our restructuring.

Option Repricings

     We implemented a special option cancellation/regrant program for all of
our employees, including executive officers, holding stock options with an
exercise price per share in excess of the fair market value of our common stock
on the regrant date. The cancellations/regrants were effected on September 18,
1998, and a number of outstanding options with an exercise price in excess of
$25.62 per share were surrendered for cancellation and new options for the same
aggregate number of shares were granted with an exercise price of $25.62 per
share.

     The following table sets forth information with respect to each of the
Named Officers concerning his or her participation in the option
cancellation/regrant program effected on September 18, 1998. We have not
implemented any other option cancellation/regrant programs in which our
executive officers have participated.

<TABLE>
<CAPTION>
                                   Number of       Market                                Length of
                                  Securities      Price of     Excercise                Option Term
                                   Underlying      Stock at     Price at                Remaining at
                                     Options       Time of       Time of                  Date of
                                     Repriced     Repricing     Repricing      New       Repricing
                        Repricing        or           or           or        Excercise       or
    Name                  Date       Amended(1)    Amendment    Amendment     Price       Amendment
- ------------------      ---------    ----------    ---------    ---------    ---------    ---------
<S>                     <C>          <C>           <C>          <C>          <C>          <C>
Lisa A. Conte(2)         9/18/98          500        $25.62      $ 70.00       $25.62     6.4 years
                         9/18/98        6,750         25.62        70.00        25.62     6.4 years
                         9/18/98        5,000         25.62       137.50        25.62     7.4 years
                         9/18/98          250         25.62       117.50        25.62     8.1 years
                         9/18/98       14,750         25.62       100.32        25.62     8.4 years

Gerald M.                9/18/98       10,000        $25.62      $ 72.50       $25.62     6.4 years
  Reaven, M.D.           9/18/98          500         25.62        70.00        25.62     6.4 years
                         9/18/98          250         25.62       117.50        25.62     8.1 years

Atul S. Khandwala,           ---          ---           ---          ---          ---           ---
  Ph.D.(3)

Steven R. King, Ph.D.    9/18/98        1,750        $25.62      $105.00       $25.62     6.2 years
                         9/18/98        1,250         25.62        70.00        25.62     6.4 years
                         9/18/98        1,190         25.62        70.00        25.62     6.4 years
                         9/18/98          500         25.62        70.00        25.62     6.4 years
                         9/18/98        2,500         25.62       137.50        25.62     7.4 years
                         9/18/98          250         25.62       117.50        25.62     8.1 years

James Pennington,        9/18/98        6,250        $25.62      $121.26       $25.62     9.0 years
  M.D.(4)

Laurie Peltier           9/18/98        2,000        $25.62      $118.76       $25.62     8.8 years
                         9/18/98          750         25.62       118.76        25.62     8.8 years

</TABLE>
- ----------------------

(1)   As of March 31, 1999, the exercise price of the options was  significantly
      higher than the trading price of stock on that date.


                                       47
<PAGE>

(2)   Ms. Conte has agreed to surrender all of her currently held options.
(3)   We accepted the resignation of Dr. Khandwala effective October 2, 1998.
(4)   Dr. Pennington was terminated effective February 19, 1999 due to
      the elimination of his position in connection with our restructuring.

1992 Stock Option Plan

     Our 1992 Stock Option Plan was adopted by the board of directors on
December 16, 1992, and has been amended several times since its adoption. The
1992 Stock Option Plan will terminate on December 31, 2008. As of April 15,
1999, 7,000,000 shares of common stock have been authorized for issuance under
the 1992 Stock Option Plan. In addition, on February 1, 2000, the number of
shares of common stock issuable under the 1992 Stock Option Plan will
automatically increase by that number of shares which, when added to the number
of shares subject to then outstanding options under the 1992 Stock Option Plan
and the number of shares available for future option grant under the 1992 Stock
Option Plan immediately prior to such increase, will equal the lesser of (a)
25,000,000 shares or (b) twenty percent (20%) of the sum of (i) the number of
voting shares of Shaman's capital stock outstanding at that time plus (ii) the
number of shares of common stock subject to the then outstanding options under
the 1992 Stock Option Plan plus (iii) the number of shares available for future
option grant under the 1992 Stock Option Plan (after taking such increase into
account). As of April 15, 1999, approximately 27,571 shares of common stock had
been issued under the 1992 Stock Option Plan, 207,018 shares of common stock
were subject to outstanding options, and 6,765,411 shares of common stock were
available for future option grant. The share reserve under the 1992 Stock Option
Plan has an automatic share increase feature.

     Subject to adjustment from time to time, the maximum number of shares of
common stock for which any one individual participating in the 1992 Stock Option
Plan may be granted stock options or separately exercisable stock appreciation
rights per calendar year, beginning with the 1999 calendar year, is 5,000,000
shares.

     The 1992 Stock Option Plan contains two separate option grant programs:
(i) a discretionary option grant program under which key employees, non-employee
directors and consultants may be granted options to purchase shares of common
stock at a fixed price per share and (ii) an automatic option grant program
under which eligible non-employee directors will automatically receive a special
one-time option grant. Options granted under the discretionary option grant
program are either incentive stock options designed to meet the requirements of
Section 422 of the Internal Revenue Code or non-statutory options not intended
to satisfy such requirements. All grants under the automatic option grant
program are non-statutory options.

     The board of directors may terminate the 1992 Stock Option Plan at any
time. Any options outstanding at the time of such termination will continue to
remain outstanding and exercisable in accordance with the terms and provisions
of the instruments evidencing those grants. The 1992 Stock Option Plan will,
however, automatically terminate on the date all shares available for issuance
are issued as vested shares or cancelled pursuant to the exercise, surrender or
cash-out of outstanding options under the plan.

      Discretionary Option Grant Program

     The compensation committee of the board of directors administers the
discretionary option grant program. The compensation committee, as administrator
of this program, has full authority to determine the eligible individuals who
are to receive option grants and/or stock appreciation rights, the type of
option (incentive stock option or non-statutory stock option) or stock
appreciation right (tandem or limited) to be granted, the number of shares to be
covered by each granted option or right, the date or dates on which the option
or right is to become exercisable and the maximum term for which the option or
right is to remain outstanding.

     Options granted under this program may either become exercisable in
periodic installments over the individual's period of service or may be
immediately exercisable for all the option shares at the exercise price paid per
share in the event the individual leaves our service prior to vesting in these
shares. Under the discretionary option grant provision of the 1992 Stock Option
Plan, we may grant options, for incentive stock option grants, at an exercise
price equal to the fair market value on the date of grant or, for non-statutory
grants, at an exercise price less than, equal to or greater than the fair market
value of the common stock on the date of grant. No option may be granted with a
term exceeding ten years. However, each such option may be subject to earlier
termination within a designated period following the optionee's cessation of
service with us. Options are not assignable or transferable by the optionee
except by will or the laws of inheritance following the optionee's death. The
optionee will not acquire any shareholder rights with respect to the option
shares until the option is exercised and the purchase price is paid for the
shares.



                                       48
<PAGE>

     The option price may be paid in cash or in shares of common stock held by
the optionee. The compensation committee may also permit an option holder to pay
the option price for the purchased shares through a loan payable in installments
over a period of years.

     In the event we are acquired, whether by a merger or asset sale, each
option at the time outstanding will automatically become exercisable for all of
the option shares at the time subject to such option and may be exercised for
any or all of such shares. However, an outstanding option will not so accelerate
if it is to be assumed by the successor corporation or the acceleration of such
option is subject to other limitations imposed by the compensation committee at
the time of the grant.

     The compensation committee also has full power and authority, exercisable
either at the time the option is granted or at any time while the option remains
outstanding, to provide for the automatic acceleration of one or more
outstanding options in the event of a change in control of Shaman (whether by
hostile tender offer for more than 50% of the outstanding voting stock or proxy
contest of the election of board members) so that each such option will become
exercisable, immediately prior to such change in control, for the total number
of shares of common stock at the time subject to such option.

     Should an option expire or terminate for any reason prior to exercise in
full, the shares subject to the portion of the option not so exercised will be
available for subsequent grant under the 1992 Stock Option Plan. In addition,
unvested shares issued under the Plan and subsequently repurchased by us at the
option exercise price paid per share will be added back to the share reserve and
will accordingly be available for subsequent issuance under the 1992 Stock
Option Plan. However, shares subject to any option surrendered or cancelled in
accordance with the stock appreciation right provisions of the 1992 Stock Option
Plan will not be available for subsequent grants


      Automatic Option Grant Program

     All grants under the automatic option grant program must be in strict
compliance with the express provisions of that program and no administrative
discretion will be exercised by the compensation committee of the board of
directors. Under the automatic option grant program each non-employee director
will receive:

            (i) On February 1, 2000, a one-time option grant if he or she is
     serving as a non-employee director at that time. The option will allow
     each such non-employee director to purchase that number of shares of
     common stock equal to one half of one percent (.05%) of the number of
     voting shares of the company's capital stock outstanding at that time; and

           (ii) Upon his or her initial  appointment or election to the board of
     directors, a special one-time option grant for that number of shares of
     common stock equal to one half of one percent (0.5%) of the number of
     voting shares of the company's capital stock outstanding on February 1,
     2000, provided such individual has not previously been employed by the
     company.

     Each option granted under the automatic option grant program will have an
exercise price per share equal to the fair market value per share of common
stock on the grant date payable in cash or shares of common stock, and a maximum
term of ten years, subject to earlier termination upon the optionee's cessation
of board service. The grant will become exercisable for the option shares in a
series of 48 successive equal monthly installments over the optionee's period of
continued board service, measured from the grant date. However, the option will
become immediately exercisable for all of the option shares in the event of an
acquisition of Shaman by merger or asset sale or a hostile takeover by tender
offer for more than 50% of the outstanding voting stock or proxy contest for
board membership.

     In addition, each option grant will be automatically cancelled upon the
successful completion of a hostile tender offer for more than 50% of the
company's outstanding voting securities. In return, the optionee will be
entitled to a cash distribution from the company in an amount per cancelled
option share equal to the excess of (a) the highest price per share of common
stock paid in connection with the tender offer over (b) the exercise price
payable for such share.

401(k) Plan

     We have a tax qualified salary deferral program under Section 401(k) of
the Internal Revenue Code. Under this program, any employee of Shaman may elect
to contribute up to 20% of his or her eligible earnings per pay period, up to
the maximum amount permitted per calendar year under the Federal tax laws. The
contributed earnings are credited to the employee's account under the 401(k)
Plan, and the account is held in trust as part of the plan assets. Each account
under the 401(k) Plan will be adjusted periodically to reflect its share of the
investment gains, earnings and losses of the trust fund, and the employee may


                                       49
<PAGE>

receive an in service loan distribution until the individual leaves Shaman's
employ, dies or becomes disabled. Alternatively, a terminated employee may defer
the distribution the account balance until age 65. Although the 401(k) Plan
permits us to make contributions to the plan which either match in whole or in
part the salary deferral contributions made by the participants or which are
otherwise to be allocated to the accounts of participants on the basis of their
eligible earnings for the plan year for which such contribution is made, we have
to date made no contributions to the 401(k) Plan.

Employment Contracts, Termination Agreements and Change of Control Agreements

     On March 15, 1999, the board of directors approved a change in control
provision concerning severance benefits for key executives. Pursuant to this
provision, should their employment with us terminate within 12 months after a
change in control, for any reason other than for cause, they will be entitled to
receive in one lump sum payment the cash equivalent of 12 months of base salary
plus any benefits to which they would otherwise be entitled. In connection with
these severance benefits, we have agreed to pay the premiums for any COBRA
coverage to which these individuals or their spouse or dependents are entitled
under a company sponsored medical plan after a change in control. In addition,
in the event of a change in control, all of the options held by such key
executives will automatically become fully vested and exercisable. Such
executives' exercisable shares will be fixed at the termination of their
employment, and they will have a period of 90 days from their termination date
to purchase such exercisable shares, as set forth in the stock option agreements
applicable to their options.

     On May 27, 1998, we entered into a letter agreement with Stephanie C. Diaz
pursuant to which she served as Vice President, Chief Financial Officer,
commencing in June 1998. Pursuant to the letter agreement, Ms. Diaz was paid an
annual salary of $135,000 in addition to a $15,000 sign-on bonus. In addition,
Ms. Diaz was granted an option for 2,250 shares of common stock on June 30, 1998
with an exercise price per share of $67.50, the fair market value per share of
common stock on that date. The option became exercisable for 12.5% of the option
shares upon completion of six months of employment and for the balance of the
option shares in 42 equal monthly installments over the next 42 months of
employment. In the event Ms. Diaz's employment is terminated other than for
cause, she was to be paid salary and benefits for six months or until she
obtained full-time employment, whichever occurs first. Ms. Diaz resigned from
Shaman effective January 4, 1999. In connection with a revised agreement, Ms.
Diaz received a payment of three months salary and the continuance of the
exercise period under existing options for a period of 12 months following
termination of her employment.

     On March 30, 1998, we entered into a letter agreement with John W.S. Chow,
Ph.D. pursuant to which he is to serve as Vice President, Technical Operations,
commencing in May 1998. Pursuant to the letter agreement, Dr. Chow is to be paid
an annual salary of $165,000 in addition to the sign-on bonus paid to him in the
amount of $10,000, and he is to be reimbursed, in an amount not to exceed
$25,000, for closing costs incurred in the sale of his former residence in New
Jersey and the purchase of his new residence in the Bay Area. Dr. Chow will,
however, be obligated to repay a prorated portion of both the sign-on bonus and
the reimbursed closing costs should he resign from the company within two years
after his hire date. Dr. Chow was also granted an option for 2,500 shares of
common stock on May 15, 1998 with an exercise price per share of $98.75, the
fair market value per share of common stock on that date. The option will become
exercisable in a series of monthly installments over the four year period
measured from the grant date as follows: 10% of the option shares will become
exercisable upon his completion of six months of employment measured from such
grant date, an additional 30% of the option shares will become exercisable in a
series of 18 successive equal monthly installments upon his completion of each
additional month of employment over the next 18 months thereafter, and the
remaining 60% of the option shares will become exercisable in a series of 24
successive equal monthly installments upon his completion of each additional
month of employment during the 3rd and 4th years of employment measured from the
grant date. Dr. Chow was also granted an additional 750 shares of common stock
on May 15, 1998 with an exercise price of $98.75, the fair market value per
share of common stock on that date. The 750 share grant will become exercisable
as follows: 375 shares upon Dr. Chow's completion of three years of employment
measured from the grant date, and the remaining 375 shares upon his completion
of four years of employment measured from the grant date. We further agreed to
pay Dr. Chow's reasonable moving expenses in an amount not to exceed $20,000 and
to provide him with an apartment for up to four months at a rental not to exceed
$2,500 per month. Should we terminate Dr. Chow's employment for any reason other
than for cause prior to May 1, 2001, we will continue to pay Dr. Chow's base
salary plus benefits on a monthly basis for up to six months or until Dr. Chow
obtains near full-time employment or consulting of at least 80% of his time,
whichever occurs sooner. We also extended a $300,000 loan to Dr. Chow in
connection with his purchase of a new residence in the Bay Area. See "Certain
Relationships and Related Transactions."

     On August 21, 1997, we entered into a letter agreement with James
Pennington, Ph.D. pursuant to which he is to serve as Senior Vice President,
Clinical Research and Chief Medical Officer, commencing October 1997. Pursuant
to the letter agreement, Dr. Pennington was paid an annual salary of
$255,000 in addition to a sign-on bonus paid to him in the amount of $60,000. In
addition, Dr. Pennington was granted, on September 16, 1997, an option to
purchase 6,250 shares of common stock at a purchase price of $121.25 per share.
The option had a term of 10 years and was to become exercisable as follows:


                                       50
<PAGE>

12.5% of the option shares upon Dr. Pennington's completion of six months of
service, measured from the grant date, and the balance of the option shares in
42 successive equal monthly installments upon his completion of each of the next
42 months of service thereafter. In the event that Dr. Pennington's employment
is terminated other than for cause, he would be entitled to receive salary and
benefits for nine months, or, if sooner, until Dr. Pennington obtained near full
time employment or consulting of at least 80% of his time. On February 15, 1999,
we entered into a new agreement with Dr. Pennington in connection with his
resignation as Senior Vice President, Clinical Research and Chief Medical
Officer, effective February 19, 1999. Under this agreement, payments will
continue to be made to Dr. Pennington in compliance with the terms of the
agreement described above. In addition, options previously granted to him will
continue to vest during this period following his termination.

     On February 9, 1996, we entered into a letter agreement with Atul S.
Khandwala, Ph.D. pursuant to which he served as Senior Vice President,
Development, commencing March 1996. Pursuant to the letter agreement, Dr.
Khandwala was paid an annual salary of $225,000. In addition, Dr. Khandwala was
granted an option to purchase 6,000 shares of common stock at a purchase price
of $137.50 per share. The option had a term of ten years and would become
exercisable over a four-year period in a series of 48 successive equal monthly
installments upon Dr. Khandwala's completion of each month of service with the
company over the four-year period measured from March 1, 1996. In the event Dr.
Khandwala's employment is terminated by us for any reason, Dr. Khandwala would
receive salary and benefits for a period of six months. On August 24, 1998, we
entered into a severance agreement with Dr. Khandwala in connection with his
resignation as Senior Vice President, Development and Chief Regulatory Officer
on October 2, 1998. Under this agreement, we will continue to forgive the
remaining balance of his loan over the remaining two and one half years of the
loan term, provided that Dr. Khandwala continues to provide consulting services
to us. On October 28, 1998, we entered into an agreement with Dr. Khandwala
pursuant to which he rendered consulting services to us through April 2, 1999.
In connection with this agreement, we issued to Dr. Khandwala 4,366 shares of
common stock and loaned him the funds necessary to satisfy the federal and state
withholding taxes applicable to those shares. In addition, we granted Dr.
Khandwala an option to purchase 2,000 shares of common stock at an exercise
price of $28.75, the fair market value of our common stock on October 20, 1998.
The option will become exercisable in six successive equal monthly installments
on the last day of each month during the consulting period.

     None of our other executive officers have employment agreements with us,
and their employment may be terminated at any time at the discretion of the
board of directors. As administrator of the 1992 Stock Option Plan, the
compensation committee has the authority to provide for accelerated vesting of
the shares of common stock subject to any outstanding options held by the Chief
Executive Officer and our other executive officers or any unvested shares
actually held by those individuals under the 1992 Stock Option Plan upon a
change in control of Shaman effected through a successful tender offer for more
than 50% of our outstanding voting securities or through a change in the
majority of the board as a result of one or more contested elections for board
membership.

Indemnification  of Directors  and  Executive  Officers and  Limitation of
Liability

     Our Restated Certificate of Incorporation and Bylaws provide for
indemnification of directors, officers and other agents of Shaman. Each of the
current directors and certain officers and agents of Shaman have entered into
separate indemnification agreements with us.

Certain Relationships and Related Transactions

     On June 17, 1998, we loaned $300,000 to John W.S. Chow, Ph.D., the Vice
President, Technical Operations, to reimburse him for a reasonable difference
between the purchase price of his residence in the Bay Area and the cost of
comparable housing in New Jersey, his former state of residence. The loan is
evidenced by his promissory note of the same date which will become due and
payable in a series of five successive equal annual installments, with the first
such installment due on June 25, 1999. The note will bear interest at a variable
per annum rate equal to the short-term applicable federal rate in effect under
the federal tax laws for January of each calendar year the loan remains
outstanding. Accordingly, the interest rate in effect for the period Dr. Chow's
note was outstanding during the 1998 calendar year was 5.52%. Accrued and unpaid
interest will become due and payable each year on the same date the principal
installment for that year becomes payable. Each installment of principal and
accrued interest will automatically be forgiven as that installment becomes due,
provided Dr. Chow continues in our employ. However, the entire unpaid balance of
the note, together with all accrued and unpaid interest, will become immediately
due and payable upon Dr. Chow's termination of employment with us prior to June
25, 2003, unless Dr. Chow's employment is involuntarily terminated by us other
than for cause. In the event (i) we terminate Dr. Chow's employment for any
reason other than for cause or (ii) Dr. Chow's employment terminates by reason
of his death or disability, then the entire principal balance of the note plus
accrued interest will be forgiven. The amount outstanding on Dr. Chow's note
(including accrued interest) was approximately $313,188 as of March 31, 1999 and
the highest amount outstanding on that note during the 1998 fiscal year was
$308,729.

     See "Employment Contracts, Termination Agreements and Change of Control
Agreements" and "Director Compensation" with respect to further transactions
between us and our officers and directors.


                                       51
<PAGE>

                             PRINCIPAL STOCKHOLDERS


     The following table sets forth certain information known to us with
respect to the beneficial ownership of the common stock as of March 31, 1999 by
(i) all persons who are beneficial owners of five percent or more of the common
stock, (ii) each director, (iii) the Named Officers in the Summary Compensation
Table above and (iv) all current directors and executive officers as a group.
The number of shares beneficially owned by each director or executive officer is
determined under rules of the SEC and the information is not necessarily
indicative of beneficial ownership for any other purpose. Shares of common stock
subject to options or warrants currently exercisable or exercisable within 60
days of March 31, 1999 are deemed to be beneficially owned by the person holding
such option or warrant for computing the percentage ownership of such person,
but are not treated as outstanding for computing the percentage of any other
person. Except as otherwise indicated, we believe that the beneficial owners of
the common stock listed below, based upon such information furnished by such
owners, have sole investment power with respect to such shares, subject to
community property laws where applicable.

     The percentages set forth in the percent column under the beneficial
ownership after the rights offering heading have been calculated based on the
assumption that each stockholder would subscribe for the stockholder's pro-rata
portion, determined as of March 31, 1999, of this rights offering, and assuming
the conversion of all outstanding Series R Preferred Stock. In the event each
stockholder subscribes for the stockholder's pro-rata portion of the rights
offering, the stockholders' beneficial ownership percentage of Shaman after the
rights offering will not be identical to its beneficial ownership percentage of
Shaman prior to the rights offering because SEC regulations require that we
include stock options exercisable within 60 days of March 31, 1999, for purposes
of the calculations in the table. However, for determining each stockholder's
pro-rata portion of the rights offering, we only include the Shaman common stock
owned by each stockholder and did not include exercisable or unexercisable
options.

     To the extent any stockholder chooses not to subscribe for its pro-rata
portion of the rights offering, its beneficial ownership of Shaman after the
rights offering will be less than is indicated in this table. If any stockholder
chooses to subscribe for more than its pro-rata portion of the rights offering,
its beneficial ownership will be greater than is indicated in this table.



<TABLE>
<CAPTION>

                                               Benefits Ownership Prior               Benefits to Ownership After
                                                to the Rights Offering                    the Rights Offering
                                       -----------------------------------------   ---------------------------------
           Name and Address                Shares              Percent                   Shares          Percent
- -------------------------------------  ---------------  ------------------------   ---------------  ----------------
<S>                                    <C>              <C>
Vulcan Ventures, Inc. (3)..........          104,000             5.43%
  110 110th Avenue N.W.
  Suite 550
  Bellevue, WA  98004
Lisa A. Conte (4)..................           44,165             2.28%
Steven R. King, Ph.D. (5)..........            5,587                *
James E. Pennington, M.D. (6)......            2,083                *
Gerald R. Reaven, M.D. (7).........            7,192                *
John Chow (8)......................              708                *
J.D. Haldeman (9)..................              722                *
Laurie Peltier (10)................              833                *
Atul S. Khandwala, Ph.D. (11)......            2,000                *
Thomas Carlson, M.D. (12)..........            3,059                *
G. Kirk Raab (13)..................           15,502                *
Adrian D.P. Bellamy (14)...........              979                *
Jeffrey Berg (15)..................              208                *
Herbert H. McDade, Jr. (16)........            2,027                *
M. David Titus (17)................            1,923                *
Current Officers and Directors as
a group (18)
(12 persons).......................           82,904             4.21%

</TABLE>
- ----------------------
*.....Less than 1.0%

(1)  Percentage of beneficial ownership is calculated assuming 1,916,858 shares
     of common stock were outstanding as of March 31, 1999. Beneficial
     ownership is determined in accordance with the rules of the Securities and
     Exchange Commission and generally includes voting or investment power with
     respect to securities. Shares of common stock subject to options or
     warrants currently exercisable or convertible, or exercisable or
     convertible within 60 days of March 31, 1999, are deemed outstanding for


                                       52
<PAGE>

     computing the percentage of the person holding such option or warrant but
     are not deemed outstanding for computing the percentage of any other
     person. Except as indicated in the footnotes to this table and pursuant to
     applicable community property laws, the persons named in the table have
     sole voting and investment power with respect to all shares of common
     stock beneficially owned.

(2)  This table is based upon information supplied to us by executive officers,
     directors and stockholders owning greater than five percent, as set forth
     in filings required by the Securities and Exchange Commission or as
     otherwise provided. The address of each officer and director identified in
     this table is that of the company's executive offices, 213 East Grand
     Avenue, South San Francisco, CA 94080. Unless otherwise indicated in the
     footnotes to this table and subject to applicable community property laws,
     each of the stockholders named in this table has sole voting and
     investment power with respect to the shares shown as beneficially owned by
     it, him or her.

(3)  Does not include 20,000 shares of Series C Preferred Stock which is
     convertible into shares of common stock, such number which is determined
     in accordance with that certain Series C Stock Purchase Agreement.

(4)  Includes 21,050 shares subject to options exercisable within 60 days of
     March 31, 1999.

(5)  Includes 4,824 shares subject to options exercisable within 60 days of
     March 31, 1999.

(6)  Represents shares subject to options exercisable within 60 days
     of March 31, 1999.

(7)  Includes 7,167 shares subject to options exercisable within 60 days of
     March 31, 1999.

(8)  Represents shares subject to options exercisable within 60 days
     of March 31, 1999.

(9)  Represents shares subject to options exercisable within 60 days
     of March 31, 1999.

(10) Represents shares subject to options exercisable within 60 days of March
     31, 1999.

(11) Represents shares subject to options exercisable within 60 days
     of March 31, 1999. Dr. Khandwala resigned from Shaman in October
     1998.

(12) Represents shares subject to options exercisable within 60 days of March
     31, 1999.

(13) Includes 8,719 shares subject to options exercisable within 60 days of
     March 31, 1999. Does not include 1,500 shares of Series C Preferred Stock
     which is convertible to a certain number of shares of common stock, such
     number which is determined in accordance with that certain Series C Stock
     Purchase Agreement.

(14) Represents shares subject to options exercisable within 60 days of March
     31, 1999.

(15) Represents shares subject to options exercisable within 60 days of March
     31, 1999.

(16) Represents shares subject to options exercisable within 60 days of March
     31, 1999.

(17) Includes 1,673 shares subject to options exercisable within 60 days of
     March 31, 1999.

(18) Includes shares held by family members associated with directors and
     officers listed above. Also includes 51,969 shares which are currently
     issuable upon the exercise of outstanding options.


                                       53
<PAGE>

                        DESCRIPTION OF OUR CAPITAL STOCK

     Our authorized capital stock consists of 220,000,000 shares of common
stock, par value $0.001 per share, and 12,000,000 shares of preferred
stock, par value $0.001 per share. We have designated 400,000 shares of our
preferred stock as Series A Preferred Stock, all of which are issued and
outstanding; 200,000 shares as Series C Preferred Stock, 115,958 of which are
issued and outstanding; 6,285 shares as Series D Preferred Stock, 1,898 of which
are issued and outstanding; and 10,000,000 shares as Series R Convertible
Preferred Stock, none of which are issued and outstanding, but up to 7,500,000
shares of which are subject to issuance in this offering and up to 545,844
shares of which are subject to issuance upon exercise of outstanding warrants.

Common Stock

     As of April 30, 1999, there were 2,226,852 shares of common stock
outstanding held of record by approximately 952 stockholders. The holders of
common stock are entitled to one vote per share on all matters to be voted upon
by the stockholders. Subject to preferences that may be applicable to
outstanding preferred stock, the holders of common stock are entitled to receive
ratably such dividends, if any, as may be declared by the board of directors out
of funds legally available therefor. See "Dividend Policy."

     In the event of our liquidation, dissolution, sale or winding up, the
holders of common stock are entitled to share ratably in all assets remaining
after payment of liabilities, subject to prior distribution rights of preferred
stock then outstanding. The common stock has no preemptive or conversion rights
or other subscription rights. There are no redemption or sinking fund rights
applicable to the common stock. All outstanding shares of common stock are fully
paid and nonassessible.

Preferred Stock

     Our board of directors has the authority to issue preferred stock in one
or more series and to fix the rights, preferences, privileges and restrictions
thereof, including dividend rights, conversion rights, voting rights, terms of
redemption, redemption prices, liquidation preferences and the number of shares
constituting any series or the designation of such series, without the further
vote or action by the holders of common stock. The approval of the outstanding
shares of existing series of preferred stock would be required for the issuance
of any additional series of preferred stock with rights, preferences or
privileges senior to those of the existing series of preferred stock. The
issuance of preferred stock may delay, defer, or prevent a change in control of
Shaman without further action by the stockholders and may adversely affect the
voting and other rights of the holders of common stock.

Series A Preferred Stock

     As of April 30,1999, there were 400,000 shares of Series A Preferred Stock
outstanding held of record by one stockholder.

     Voting. Each holder of Series A Preferred Stock is entitled to that number
of votes equal to the number of shares of common stock into which the shares of
Series A Preferred Stock held by such stockholder are convertible and has voting
rights and powers equal to those of the common stock, except as otherwise
expressly provided or as required by law.

     Dividends. Subject to preferential rights with respect to any series of
preferred stock which may from time to time come into existence, holders of
Series A Preferred Stock are entitled to receive such dividends as may be
declared by the Board of Directors out of funds legally available therefor. Any
dividends declared on the Series A Preferred Stock are not cumulative.

     Liquidation Preference. In the event of a liquidation, dissolution, sale
or winding up of Shaman, holders of Series A Preferred Stock are entitled to
receive $8.15 per share (as adjusted for any stock dividends, combinations or
splits with respect to such shares) plus all accrued or declared but unpaid
dividends. If the assets and funds of Shaman legally available for distribution
to the holders of the Series A Preferred Stock are insufficient to permit
payment of the full preferential amount, then holders of the Series A Preferred
Stock are entitled to share ratably the entire amount of such assets or funds
legally available for distribution. 

     Conversion.  Each share of Series A Preferred Stock is convertible into one
share of common stock, as adjusted for any stock dividends, combinations or
splits with respect to such shares, at any time at the option of the holder. The
minimum number of shares which may be converted at any one time is 75,000
shares, or such lesser number of shares as are then outstanding. Each share of


                                       54
<PAGE>

Series A Preferred Stock shall automatically convert into common stock on the
earlier to occur of: (i) immediately in the event that at any time prior to July
23, 1999, the closing sale price of our common stock has for a period of 60
consecutive trading days exceeded $163.00 per share; or (ii) July 23, 1999. If
the Series A Preferred Stock is automatically converted on July 23, 1999, the
conversion price into common stock is adjusted such that each share of Series A
Preferred Stock will automatically convert into such number of shares of common
stock as equals $163.00 divided by the weighted-average closing sale price for
the 60 consecutive trading days ending two days prior to July 23, 1999, but in
no event shall a share of Series A Preferred Stock be convertible into more than
1.358 shares of common stock, in each case as appropriately adjusted for any
stock dividends, combinations or splits with respect to such shares of common
stock.

     Redemption. The Series A Preferred Stock is not redeemable.

     Priority. The Series A Preferred Stock ranks senior to the common stock
and the Series R Preferred Stock and junior to the Series C Preferred Stock and
the Series D Preferred Stock, if issued, as to dividends, distributions and
distribution of assets upon liquidation, dissolution or winding up of Shaman.

Series C Preferred Stock

     As of April 30,1999, there were 115,958 shares of Series C Preferred Stock
outstanding held of record by 21 stockholders.

     Voting. The holders of the Series C Preferred Stock are entitled (i) during
the first year after the issuance thereof (August 18, 1998) to six votes
for each share of Series C Preferred Stock held; and (ii) thereafter, to one
vote for each share of common stock into which such share of Series C Preferred
Stock is convertible on the record date for the matter to be voted on.

     Dividends.  Each share of Series C  Preferred  Stock  shall be  entitled to
receive cumulative dividends paid semi-annually on May 30 and November 29 of
each year as follows: (i) a stock-on-stock dividend of $10.00 per annum, paid in
arrears, in shares of common stock (valued at 85% of the average closing price
of the common stock for the 10 trading day period ending three trading days
prior to the date on which the dividend is paid); plus (ii) a cash amount
equaling 0.00005% of the Shaman's United States net sales, if any, for the
preceding two calendar quarters of its SP-303/Provir product for the treatment
of diarrhea less $5.00 (the value of the semi-annual stock dividend). We have
agreed to honor this royalty with our sales of SB-300, to the extent sold to the
HIV/AIDS Community. If under Delaware law, we are unable to pay the cash amount
of the above described dividend, then the cash portion shall be payable in
shares of common stock (valued at 85% of the average closing price of the common
stock for the 10 day trading period ending three trading days prior to the date
on which the dividend is paid).

     Liquidation Preference. In the event of a liquidation, dissolution, sale
or winding up of the Company, holders of the Series C Preferred Stock shall be
entitled to receive, prior and in preference to the holders of the common stock,
the Series A Preferred Stock, the Series D Preferred Stock and the Series R
Preferred Stock, an amount equal to $100 per share, plus any accrued and unpaid
dividends.

     Conversion. Each share of Series C Convertible Preferred Stock shall be
convertible, at any time commencing on August 18, 1999 at the election of each
holder, and automatically on August 18, 2004, into the greater of (i) 0.8333
shares of common stock or (ii) such number of shares of common stock as equals
$100 divided by 85% of the average closing price of the common stock for the 10
trading day period ending three trading days prior to the date of conversion.

     Redemption. The Series C Preferred Stock is not redeemable.

     Priority.  The Series C Preferred  Stock ranks senior to the common  stock,
the Series A  Preferred  Stock,  the Series D  Preferred  Stock and the Series R
Preferred Stock as to dividends,  distributions  and distribution of assets upon
liquidation, dissolution or winding up of Shaman.

     Series D Preferred Stock

     As of April 30, 1999, there were 1,898 shares of Series D Preferred Stock
outstanding held of record by six stockholders.

     Voting.  Except as otherwise  required by law or expressly  provided in the
certificate of  incorporation,  the Series D Preferred  Stock is not entitled to
vote on any matter.



                                       55
<PAGE>

     Dividends.  Each share of Series D  Preferred  Stock  shall be  entitled to
receive cumulative dividends at the rate of $55 per year payable quarterly
commencing on February 1, 1999. These dividends may be paid in cash or, subject
to certain limitations, any combination of cash and shares of common stock.
Dividends not paid on the due date shall accrue interest until paid at the rate
of 12% per annum. If the dividend is paid in shares of common stock, the number
of shares to be delivered to each holder of Series D Preferred Stock shall be
determined by dividing the aggregate dollar amount of the dividend payable to
each such holder by an amount equal to 90% of the outstanding price of the
common stock during 12 trading days ending one day prior to the date of the
conversion.

     Liquidation Preference. In the event of a liquidation, dissolution, sale or
winding up of Shaman, holders of the Series D Preferred Stock shall be entitled
to receive, prior and in preference to the holders of the common stock and the
Series A Preferred Stock and the Series R Preferred Stock, but subordinate to
the holders of the Series C Preferred Stock, an amount equal to $1,000 per
share, plus any accrued and unpaid dividends.

     Conversion. Each share of Series D Convertible Preferred Stock shall be
convertible at the election of the holder, at any time commencing on the date on
which any shares of Series D Preferred Stock were first issued, into a number of
shares of common stock equal to $1,000 plus any accrued but unpaid dividends and
interest on the Series D Preferred Stock, divided by 90% of the lowest trading
price of the common stock during the 12 trading days ending one day prior to the
date of the conversion.

     The  delisting  of  our  common  stock  from  The  Nasdaq  National  Market
constituted an Optional Redemption Event (as defined in our Certificate of
Incorporation). In connection therewith, on February 4, 1999, we issued a
Control Notice (as defined in the Certificate of Incorporation) that prevented
the redemption of the Series D Preferred Stock. This Control Notice will remain
in effect for as long as we are not listed on any of The Nasdaq National Market,
The Nasdaq SmallCap Market, the American Stock Exchange or the New York Stock
Exchange. Delivery of the Control Notice had the effect of increasing the annual
dividend to $180 per share and adjusting the conversion price of the Series D
Preferred Stock to 72% of the lowest trading price during a designated time
period prior to the conversion.

     Redemption. The holders of the Series D Preferred Stock may require that we
redeem all or part of their shares if any of the following optional redemption
events occur: (i) for five consecutive trading days there is no reported sale
price of our common stock on Nasdaq, the New York Stock Exchange or the American
Stock Exchange, (ii) our common stock ceases to be listed on Nasdaq, the NYSE or
the AMEX, (iii) we merge or effect another transaction in which we sell all or
substantially all of our assets or our stockholders prior to the transaction do
not collectively own at least 51% of the voting securities of the surviving
corporation, or the common stock of the surviving corporation is not listed on
Nasdaq, the NYSE or the AMEX, (iv) we adopt changes to our certificate of
incorporation that materially and adversely affect the rights of the holders of
the Series D Preferred Stock in a different and more adverse manner than they
affect the rights of the holders of the common stock, (v) if the holders are
unable for a period ranging from 20 to 30 days to sell their shares of common
stock issuable upon conversion of the Series D Preferred Stock pursuant to an
effective registration statement, or (vi) if we fail or default in performing
any material obligation to a holder of Series D Preferred Stock under the terms
of our certificate of incorporation or the Series D Preferred Stock purchase
agreement. The per share redemption price is $1,000 plus 118% of accrued but
unpaid dividends on each share of Series D Preferred Stock.

     We may under certain circumstances issue a control notice upon the
occurrence of any of the three optional redemption events described in clauses
(i), (ii) and (iii) above, which will prevent the requirement that we redeem the
shares. The issuance of this control notice has the effect of increasing the
annual cumulative dividend payable to the Series D Preferred Stock holders to
$180 per share (if the redemption event was one of those described in clause (i)
or (ii) above) or $300 per share (for the redemption event described in clause
(iii) above), and adjusting the conversion price of the Series D Preferred Stock
to 72% of the lowest trading price for a designated period prior to the
conversion (if the redemption event was one of those described in clause (i) or
(ii) above), or 63% of the lowest trading price for a designated period prior to
the conversion (for the redemption event described in clause (iii) above).

     The delisting of our common stock from The Nasdaq National Market in
February 1999 constituted an optional redemption event for our Series D
Preferred Stock. Since we do not have adequate resources to pay to redeem the
Series D Preferred Stock, we have issued the control notice to the holders of
the Series D Preferred Stock as required under our charter that prevented the
redemption of the Series D Preferred Stock. The notice preventing the redemption
of the Series D Preferred Stock will remain in effect for as long as our
securities are not listed on any of The Nasdaq National Market, The Nasdaq
SmallCap Market, the AMEX or the NYSE.

     Priority. The Series D Preferred Stock ranks senior to the common stock,
the Series A Preferred Stock and the Series R Preferred Stock but junior to the
Series C Preferred Stock as to dividends, distributions and distributions of
assets upon liquidation, dissolution or winding up of Shaman.



                                       56
<PAGE>

Series R Preferred Stock

     Upon completion of this offering, up to 7,500,000 shares of Series R
Convertible Preferred Stock will be outstanding. The Series R Convertible
Preferred Stock will have the following rights, preferences and privileges:

     Voting. The holders of the Series R Convertible Preferred Stock are
entitled to 10 votes for each share of Series R Preferred Stock held.

     Dividends. Subject to preferences that may be applicable to outstanding
preferred stock, the holders of Series R Convertible Preferred Stock are
entitled to receive ratably with the holders of the common stock, such
dividends, if any, as may be declared by the board of directors out of funds
legally available therefor. See "Dividend Policy."

     Liquidation Preference. In the event of a liquidation, dissolution, sale
or winding up of Shaman, holders of the Series R Convertible Preferred Stock
shall be entitled to receive, prior and in preference to the holders of the
common stock, but subordinate to the holders of the Series A, Series C and
Series D Preferred Stock, an amount equal to $2.00 per share, plus any accrued
and unpaid dividends.

     Conversion. The Series R Convertible Preferred Stock is not convertible
until February 1, 2000. On that date, each share of Series R Convertible
Preferred Stock shall be automatically converted into such number of shares of
common stock as equals the lower of $_______, which is equal to 10% of the
average closing sales price for the common stock for the 10 trading days ending
three trading days prior to the date of this prospectus, or the per share price
that is equal to 10% of the average closing sales price of our common stock for
the 10 trading day period ending three trading days prior to February 1, 2000.

      Redemption. The Series R Convertible Preferred Stock is not redeemable.

     Priority. The Series R Preferred Stock ranks equally with the common stock
and junior to the Series A, Series C and Series D Preferred Stock as to
dividends, and ranks senior to the common stock but junior to the Series A,
Series C and Series D Preferred Stock as to distributions of assets upon
liquidation, dissolution or winding up of Shaman.

Warrants

     As of April 30, 1999, there were outstanding warrants to purchase an
aggregate of 104,833 shares of common stock at a weighted average exercise price
of $115.20 per share, and outstanding warrants to purchase up to an aggregate of
796,342 shares of Series R Preferred Stock at an exercise price of $2.00 per
share.

     Between September 1990 and September 1993, we issued, in connection with
equipment lease financings, warrants to purchase 4,585 shares of common stock at
prices ranging from $48.00 to $216.68 per share. These warrants expire between
September 2000 and September 2002.

     In July 1996, we issued to one investor warrants to purchase an aggregate
of 27,500 shares of common stock. These warrants are exercisable through July
26, 2002 at an exercise price of $203.68 per share. We have filed a registration
statement with the SEC for the resale of shares issued upon exercise of these
warrants, which registration statement was declared effective on November 30,
1998.

     In May 1997, we issued, in connection with a certain debt financing,
warrants to purchase 10,000 shares of common stock at an exercise price of
$125.00 per share. These warrants expire May 7, 2007.

     In March 1998, we issued to certain investors warrants to purchase an
aggregate of 6,875 shares of common stock. These warrants are exercisable
through March 18, 2001 at an exercise price of $150.00 per share. We have filed
a registration statement with the SEC for the resale of shares issued upon
exercise of these warrants, which registration statement was declared effective
on July 10, 1998.

     In June 1998, we issued to certain investors warrants to purchase an
aggregate of 17,500 shares of common stock. These warrants are exercisable
through June 22, 2003 at an exercise price per share equal to 115% of the
average trading price of the common stock during specified measurement periods.
These warrants provide for adjustment of the number of shares of common stock
issuable upon exercise thereof, including upon the distribution of certain
dividends, upon our reorganization, reclassification or merger, or upon the
division or combination of our common stock. We have filed a registration


                                       57
<PAGE>

statement with the SEC for the resale of shares issued upon exercise of these
warrants, which registration statement was declared effective on July 10, 1998.

     In December 1998, we issued to certain investors warrants to purchase an
aggregate of 38,373 shares of common stock. These warrants are exercisable
through December 10, 2003 at an exercise price per share equal to $61.40 per
share.

     In April 1999, we issued to MMC/GATX Partnership No. 1 in connection with
the amendment of a loan agreement with GATX a cashless exercise warrant to
purchase 296,342 shares of the class and series of equity securities which are
being registered in this offering (i.e. the Series R Preferred Stock). This
warrant is exercisable on the date of this prospectus and through the seventh
anniversary date of the earlier to occur of (i) December 31, 1999, or (ii) the
date of this prospectus, subject to acceleration upon certain events. The per
share exercise price will be $2.00 (the per share price at which the Series R
Preferred Stock is sold hereunder).

     In April 1999, we also issued to various  lenders who were either  existing
stockholders, key executives or directors cashless exercise warrants to purchase
up to an aggregate of 249,502 shares of the class and series of equity
securities which are being registered in this offering (i.e. the Series R
Preferred Stock). These warrants are exercisable upon the consummation of the
sale of the Series R Preferred Stock registered hereunder and through the third
anniversary date of such consummation, subject to acceleration upon certain
events. The per share exercise price will be $2.00 (the per share price at which
the Series R Preferred Stock is sold hereunder).

Credit Facility Convertible Promissory Notes

     Pursuant to the terms of our credit facility and note purchase agreement
with various lenders, at such time as we request funding of the credit facility
and receive the funds, we will issue Senior Subordinated Secured Convertible
Promissory Notes that are convertible after the date of the consummation of this
offering and prior to the earlier to occur of (i) January 1, 2000 and (ii)
thirty days following the consummation date of this offering into an aggregate
of ____________ shares of the Series R Preferred Stock, at a conversion price of
$2.00 per share.

     As long as any of the foregoing warrants remain unexercised and
outstanding, the holders thereof will have the opportunity to profit from an
increase in the market price of the common stock, if any, without assuming the
risk of ownership.

Registration Rights

     We have granted to one investor certain demand and "piggyback" rights to
register shares of common stock currently owned or in the future acquired by
such investor pursuant to a stock purchase agreement between us and such
investor. The investor has waived these registration rights with respect to this
offering.

     We have granted to holders of warrants and convertible notes issued in
connection with a credit facility and note purchase agreement certain demand
registration rights covering the shares of Series R Convertible Stock underlying
these warrants and notes. We are required under these registration rights to
file a registration statement to register the shares no later than 30 days after
the effective date of this offering.

Anti-Takeover Effects of Provisions of Certificate of Incorporation and Bylaws

     Shaman is subject to the provisions of Section 203 of the Delaware General
Corporation Law statute. Section 203 prohibits a publicly held Delaware
corporation from engaging in a "business combination" with an "interested
stockholder" for a period of three years after the person becomes 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 who, together with
affiliates and associates, owns, or within three years did own, 15% or more of
the corporation's voting stock.

     Our Certificate of Incorporation divides the board of directors into two
classes with staggered two-year terms. Under our by-laws, any vacancy on the
board of directors, including a vacancy resulting from an enlargement of the
board of directors, may be filled by a majority of the directors then in office.
The classification of the board of directors and the limitation on filling of
vacancies could make it more difficult for a third party to acquire, or
discourage a third party from acquiring, control of Shaman.

Transfer Agent and Registrar

BankBoston, N.A. is the transfer agent and registrar for our Series R
Convertible Preferred Stock and common stock.


                                       58
<PAGE>

SHARES ELIGIBLE FOR FUTURE SALE

     Future sales of substantial amounts of common stock in the public market
could adversely affect the market price of our common stock. In addition, an
active public market for our common stock may not continue in the future.

     Upon completion of this offering, there will be approximately
____________________ shares of common stock outstanding, _________________
shares of common stock issuable upon conversion of outstanding shares of Series
D Preferred Stock (assuming a conversion price, which is based on the common
stock market price, of $_____ per share), and ________________ shares of common
stock issuable upon exercise of outstanding warrants, all of which are freely
tradeable without restriction, except for restrictions imposed on the resale of
shares held by our affiliates, as defined in the Securities Act. An additional
____________ shares of common stock will be issuable upon conversion of the
Series C Preferred Stock (assuming a conversion price, which is based on the
common stock market price, of $_____ per share) commencing on August 18, 1999,
all of which will be freely tradeable without restriction. We will also have up
to 7,500,000 shares of Series R Preferred Stock outstanding and
__________________ shares of Series R Preferred Stock subject to issuance upon
exercise of outstanding warrants. The Series R Preferred Stock is convertible
into common stock on February 1, 2000. On that date, each share of Series R
Convertible Preferred Stock will automatically convert into such number of
shares of common stock as equals the lower of $_______, or a per share price
that is equal to 10% of the average closing sales price of our common stock for
the 10 trading days ending three trading days prior to February 1, 2000.
Assuming a conversion price of $____________ per share, upon conversion of the
Series R Convertible Preferred Stock on February 1, 2000, ________________
shares of common stock will be issued, or issuable pursuant to warrants, that
will be immediately freely tradeable without restriction, other than by our
affiliates.


                                       59
<PAGE>


                           THE RIGHTS OFFERING

The Subscription Rights

     We are offering our stockholders the right to subscribe for and purchase
up to 7,500,000 shares of Series R Convertible Preferred Stock at $2.00 per
share. The rights offering is open only to those stockholders who owned common
stock on [________________, 1999]. The rights offering is not open to anyone who
did not own common stock on [_____________, 1999].

     We are offering stockholders the opportunity to purchase _______ shares of
Series R Convertible Preferred Stock for each share of common stock they owned
on [_______________,1999]. In determining the number of shares of Series R
Convertible Preferred Stock we will issue to each stockholder pursuant to the
subscription rights offered by this prospectus, we will round up to the nearest
whole number. We will not issue subscription rights to purchase fractional
shares and we will not pay cash in place of subscription rights.

Basic Subscription Privilege

     Each subscription right entitles you to purchase _____ shares of Series R
Convertible Preferred Stock for each share of common stock you owned at the
close of business on [___________, 1999]. You will receive certificates
representing the shares that you purchase pursuant to your basic subscription
privilege as soon as practicable after your basic subscription has been
accepted, which may occur at any time prior to the expiration of this offering.
We may accept your basic subscription amount prior to accepting your
over-subscription amount. In that event, we will deliver stock certificates for
the basic subscription amount and the subscription agent will retain the
over-subscription amount in escrow until the expiration of this offering, as
provided below.

Over-Subscription Privilege

     Each subscription right also grants you an over-subscription privilege to
purchase additional shares of Series R Convertible Preferred Stock that are not
purchased by other stockholders. You are entitled to exercise your
over-subscription privilege only if you exercise your basic subscription
privilege in full. If you wish to exercise your over-subscription privilege, you
should indicated the number of additional shares that you would like to purchase
in the space provided on your subscription agreement. When you send in your
subscription agreement, you must also send the full purchase price for the
number of additional shares that you have requested to purchase in addition to
the payment due for shares purchased through your basic subscription privilege.
If the number of shares remaining after the exercise of all basic subscription
privileges is not sufficient to satisfy all over-subscription privileges, you
will be allocated shares pro rata, subject to elimination of fractional shares,
in proportion to the number of shares you offer to purchase above your basic
subscription privilege. However, if your pro rata allocation exceeds the number
of shares you requested on your subscription certificate, then you will receive
only the number of shares that you requested, and the remaining shares from your
pro rata allocation will be divided among other stockholders exercising their
over-subscription privileges. In addition, we have the discretion to issue less
than the total number of shares that may be available for over-subscription
requests.

     As soon as practicable after July _____, 1999, BankBoston, N.A., the
subscription agent, will determine the number of shares of Series R Convertible
Preferred Stock that you may purchase pursuant to the over-subscription
privilege. You will receive certificates representing these shares as soon as
practicable after the expiration date. If you request and pay for more shares
than are allocated to you, we will refund that overpayment, without interest to
you. In connection with the exercise of the over-subscription privilege, banks,
brokers and other nominee holders of subscription rights who act on behalf of
beneficial owners will be required to certify to the subscription agent and us
as to the aggregate number of subscription rights that have been exercised, and
the number of shares of common stock that are being requested through the
over-subscription privilege, by each beneficial owner on whose behalf such
nominee holder is acting.

Minimum Subscription Requirement

     We require a minimum subscription of 50 shares of Series R Preferred
Stock, or $100. This means that if you hold fewer than ____ shares of common
stock on the record date, you will be allowed to purchase 50 shares of Series R
Preferred Stock, which will be considered your basic subscription privilege.



                                       60
<PAGE>

Plan of Distribution

     On or about _____________, 1999, we will distribute the subscription
rights agreements and copies of this prospectus to individuals who owned shares
of our common stock on ____________, 1999. If you wish to exercise your
subscription rights and purchase shares of Series R Convertible Preferred Stock,
you should complete the subscription agreement and return it, with payment for
the shares, to the subscription agent, BankBoston, N.A. If you have any
questions, you should contact our information agent, Shareholder Communications
Corporation, at the telephone number and address on page ____. See "The Rights
Offering -- Subscription Procedures."

     We have retained our transfer agent, BankBoston, N.A., to assist with the
rights offering in the role of the subscription agent. The subscription agent
will hold all subscription agreements received from stockholders, and will be
responsible for delivering stock certificates and refunds, in case of
over-subscription or cancellation of the offering, to stockholders. We will pay
all fees and expenses of the subscription agent in connection with the rights
offering, which we estimate will be approximately $______. You are responsible
for paying any other commissions, fees, taxes or other expenses incurred in
connection with the exercise of the subscription rights.

Expiration Date

     The rights offering will expire at 5:00 p.m., Eastern Daylight Savings
Time, on July __, 1999, unless extended in the sole discretion of Shaman. IF YOU
DO NOT EXERCISE YOUR BASIC SUBSCRIPTION PRIVILEGE OR OVER-SUBSCRIPTION PRIVILEGE
PRIOR TO SUCH TIME, WE HAVE THE RIGHT TO REJECT YOUR SUBSCRIPTION.

     We reserve the right to reject any subscription agreements that the
subscription agent receives after 5:00 p.m. on the expiration date, regardless
of when the documents were originally mailed. Stockholders who wish to
participate in the rights offering should submit all subscription agreements to
BankBoston, N.A. by the expiration date, or to their broker or bank at least 10
days before the expiration date, to allow the broker or bank sufficient time to
carry out those instructions.

     The rights offering is not conditioned upon our receipt of subscriptions
for any minimum number of shares. However, the rights offering may be cancelled
at any time prior to its completion, in which case all subscription payments
will be returned without interest.

Subscription Payments

     Each subscription agreement submitted pursuant to this rights offering
must be accompanied by the full amount of the purchase price for all of the
shares of Series R Preferred Stock subscribed for by the stockholder. If a
stockholder submits less than the full purchase price, we will limit such
stockholder's maximum subscription to the number of shares purchasable with
those funds, rounded down to the nearest whole number of shares.

     If a subscription is rejected in whole or in part, the subscription agent
will promptly refund payment for any unpurchased shares. We will not pay
interest on any subscription funds.

Determination of Offering Price

     Our board of directors intend to obtain an opinion from Alliant Partners
that the terms of this rights offering are fair, from a financial point of view,
to our stockholders. The price at which the Series R Preferred Stock will
convert into common stock was set at a substantial discount to the actual
trading price of our common stock. This discount is offered as an incentive for
our current stockholders to participate in this offering. Nevertheless, the
offering price does not necessarily bear any relationship to the book value of
our assets, past operations, cash flow, earnings, financial condition or any
other established criteria for value and should not be considered an indication
of our underlying value.

Subscription Procedures

     To participate in the rights offering, you must submit a properly
completed subscription agreement, together with full payment of the offering
price for all shares for which you subscribe. Those who hold common stock for
the account of others, such as brokers, banks, trustees or depositories, should
notify the  beneficial owners of those shares as soon as possible to ascertain
the beneficial owners' intentions and to obtain instructions with respect to the
rights offering.



                                       61
<PAGE>

     The subscription agreement and payment must be received by the
subscription agent before 5:00 p.m., Eastern Daylight Savings Time, on July ___,
1999, unless extended in our sole discretion. Payment of the offering price must
be made:

     - by check or bank draft drawn upon a U.S. bank or postal,
       telegraphic, or express money order payable to "BankBoston, N.A.,
       as Subscription Agent;"

     - by wire transfer of same day funds to the account maintained by
       the subscription agent for such purpose; or

     - by notice of guaranteed delivery of payment from a bank, a trust
       company or a New York Stock Exchange member.

     Payment of the offering price will be deemed made only upon (1) the
subscription agent's receipt of a certified check or bank draft drawn upon a
U.S. bank or any postal, telegraphic or express money order, (2) the clearance
of any uncertified check or (3) the receipt of good funds in the wire transfer
account maintained by the subscription agent. If you wish to pay by uncertified
personal check, please note that your check may take five business days or more
to clear and, therefore, you should make payment sufficiently in advance of the
expiration date to ensure that payment is received and clears by the expiration
date.

     Subscription agreements and any checks in payment of the offering price
should be delivered by mail, hand delivery, or overnight courier, to:

               BankBoston, N.A.
               40 Campanelli Drive
               Braintree, Massachusetts 02184

     If you do not indicate the number of shares to be purchased or do not
forward full payment of the offering price, then you will be deemed to have
exercised the basic subscription privilege to the full extent of the payment
received and, if any funds remain, will be deemed to have exercised the
over-subscription privilege to the extent of the remaining funds. In each case,
share amounts will be rounded down to the nearest whole number.

     The method of delivery of the subscription agreement and payment of the
offering price will be at your election and risk. If sent by mail, it is
recommended that your subscription agreement and payment be sent by registered
mail, properly insured, with return receipt requested, and that a sufficient
number of days be allowed to ensure delivery to the subscription agent and
clearance of payment prior to the expiration date. Because uncertified personal
checks may take at least five business days to clear, you are urged to arrange
for payment by certified or cashier's check, money order or wire transfer of
funds.

     Our answers to all questions concerning the timeliness, validity, form and
eligibility of any subscription will be final and binding. We may, in our sole
discretion, waive any defect or irregularity, permit a defect or irregularity to
be corrected within any time as we may determine, or reject the purported
exercise of any right. Subscriptions will not be deemed to have been received or
accepted until all irregularities have been waived or cured within the time that
we determine in our discretion. Neither we nor the subscription agent will be
under any duty to notify you of any defect or irregularity in connection with
the submission of your subscription agreement or incur any liability for failure
to give notification.

     If you have any questions concerning the rights offering or these
subscription procedures, or if you would like additional copies of this
prospectus or other documents, please contact our information agent: Shareholder
Communications Corporation, 17 State Street, New York, NY 10004. Banks and
brokers may call the information agent at (212) 805-7113, and stockholders may
call toll free at (800) 546-8620.

Non-Transferability of Subscription Rights

     Only you may exercise the basic subscription privilege and the
over-subscription privilege. You may not sell, give away or otherwise transfer
the basic subscription privilege or the over-subscription privilege.

No Revocation of Subscription

     After you have exercised your basic subscription privilege or
over-subscription privilege, you may not revoke that exercise. You should not
exercise your subscription rights unless you are certain that you wish to
purchase shares of our Series R Convertible Preferred Stock.



                                       62
<PAGE>

Amendment and Termination of Rights Offering

     We reserve the right to amend the terms and conditions of the rights
offering. If we make an amendment that we consider significant, we will (1) mail
notice of the amendment to all stockholders who owned shares of common stock on
___________, 1999, (2) extend the expiration date by at least 14 days and (3)
offer all subscribers not less than 10 days to revoke any prior subscriptions,
in whole or in part. In all other cases, subscriptions will be irrevocable.

     We also reserve the right to terminate the rights offering at any time, in
our discretion, in which case all subscriptions will be cancelled, and we will
return all subscription payments to subscribers without interest.

     Upon the occurrence of any change in or cancellation of the rights
offering, we will issue a press release to that effect, and we will file a
post-effective amendment to the registration statement covering this prospectus.

Shares of Common Stock Outstanding After the Rights Offering

     Assuming we issue all of the shares of Series R Convertible Preferred
Stock offered in the rights offering and assuming conversion of all of such
shares at a conversion price of $____ per share, approximately ____ shares of
common stock will be issued and outstanding following the rights offering and
conversion of the Series R Preferred Stock. This would represent a __% increase
in the number of outstanding shares of our common stock. If you do not exercise
your basic subscription privilege, the percentage of Shaman common stock that
you hold will substantially decrease.

Certain Ownership Limits and Reporting Requirements

     Any person or group that acquires direct or indirect beneficial ownership
of more than 5% of the outstanding shares of our common stock will be subject to
special reporting requirements under Section 13(d) or 13(g) of the Securities
Exchange Act of 1934. Any person or group that acquires direct or indirect
beneficial ownership of more than 10% of the outstanding shares of our common
stock will be subject to special reporting requirements under Section 16(a) of
the Exchange Act and may become liable under Section 16(b) of the Exchange Act
for reimbursement of any "short-swing profits." Please consult with your
attorney to see if these rules will apply to you.

State and Foreign Securities Laws

     The rights offering is not being made in any state or foreign country in
which it is unlawful to do so, nor are we selling or accepting subscriptions
from holders who are residents of any such state or country. We may delay the
commencement of the rights offering in certain states or other jurisdictions in
order to comply with the securities law requirements of those states or other
jurisdictions. It is not anticipated that there will be any changes in the terms
of the rights offering. We may decline, in our sole discretion, to make
modifications to the terms of the rights offering requested by certain states or
other jurisdictions, in which case stockholders who live in those states or
jurisdictions will not be eligible to participate in the rights offering.

No Recommendations

     We are not making any recommendation as to whether or not you should
exercise your subscription rights. You should make your decision based on your
own assessment of your best interests.


                                       63
<PAGE>


FEDERAL INCOME TAX CONSIDERATIONS

     The following summarizes the material federal income tax consequences of
the rights offering. This summary is based on current law, which is subject to
change at any time, possibly with retroactive effect. This summary is not a
complete discussion of all federal income tax consequences of the rights
offering, and, in particular, may not address federal income tax consequences
applicable to stockholders subject to special treatment under federal income tax
law. In addition, this summary does not address the tax consequences of the
rights offering under applicable state, local or foreign tax laws. This
discussion assumes that your shares of Shaman stock and the subscription rights
and shares issued to you pursuant to the rights offering constitute capital
assets.

     Receipt and exercise of the subscription rights distributed pursuant to
the rights offering is intended to be nontaxable to stockholders, and the
following summary assumes you will qualify for such nontaxable treatment. We
have not sought, nor do we intend to seek, any ruling from the IRS or an opinion
of counsel related to the tax matters described below.

     This discussion is included for your general information only. You should
consult your tax advisor to determine the tax consequences to you of the rights
offering in light of your particular circumstances, including any state, local
and foreign tax consequences.

Taxation of Stockholders

     Receipt of a subscription right: You will not recognize any gain or other
income upon receipt of a subscription right.

     Tax basis of subscription rights: Your tax basis in each subscription
right will depend on whether you exercise the subscription right or allow the
subscription right to expire.

     If you exercise a subscription right, your tax basis in the subscription
right will be determined by allocating the tax basis of your Shaman stock on
which the subscription right is distributed between the Shaman stock and the
subscription right, in proportion to their relative fair market values on the
date of distribution of the subscription right. However, if the fair market
value of your subscription rights is less than 15% of the fair market value of
your existing shares of Shaman stock, then the tax basis of each subscription
right will be deemed to be zero, unless you elect, by attaching an election
statement to your federal income tax return for 1999, to allocate tax basis to
your subscription rights.

     If you allow a subscription right to expire, it will be treated as having
no tax basis.

     Holding period of subscription rights: Your holding period for a
subscription right will include your holding period for the shares of common
stock upon which the subscription right is issued.

     Expiration of subscription rights: You will not recognize any loss upon
the expiration of a subscription right.

     Exercise of subscription rights: You generally will not recognize a gain
or loss on the exercise of a subscription right. The tax basis of any share of
Series R Preferred Stock that you purchase through the rights offering will be
equal to the sum of your tax basis, if any, in the subscription right exercised
and the price paid for the share. The holding period of the shares of Series R
Preferred Stock purchased through the rights offering will begin on the date
that you exercise your subscription rights.

     If treated as a taxable distribution: If, contrary to Shaman's intent, the
rights offering does not qualify as nontaxable, you would be treated as
receiving a taxable distribution equal to the fair market value of the
subscription rights on their distribution date. The distribution would be taxed
as a dividend to the extent made out of our current or accumulated earnings and
profits; and any excess would be treated first as a return of your basis
(investment) in your Shaman stock and then as a capital gain. You would have a
tax basis in the rights equal to the fair market value of the rights on the date
of the rights distribution and your holding period in the rights would begin on
the date of distribution of the rights. Expiration of the subscription rights
would result in a capital loss. You generally will not recognize gain or loss on
the exercise of a subscription right. The tax basis of any share of common stock
that you purchase through the rights offering will be equal to the sum of your
tax basis, if any, in the subscription right exercised and the price paid for
the share. The holding period of the shares of common stock purchased through
the rights offering will begin on the date that you exercise your subscription
rights.

     Conversion of Series R Preferred Stock to Common Stock: There is some risk
that the Internal Revenue Service would argue that the conversion of the Series
R Preferred Stock to common stock is properly characterized as a taxable stock
dividend rather than a nontaxable event. If the conversion were treated as a
taxable stock dividend, the Internal Revenue Service may argue that the amount
of the dividend is equal to the amount of the discount from the stated trading


                                       64
<PAGE>

price of the common stock on which the conversion is based. Because the Series R
Preferred Stock will convert automatically and in the full to common stock, and
because the Series R Preferred Stock will not have any dividend arrearages as of
the time the conversion occurs, Shaman anticipates that the conversion of the
Series R Preferred Stock will qualify as a nontaxable event. If the conversion
qualifies as a nontaxable event, your tax basis in your Series R Preferred Stock
will be allocated among the shares of common stock you receive upon conversion,
and the holding period of the shares of common stock will include your holding
period you had in the Series R Preferred Stock prior to conversion.

Taxation of Shaman

     We will not recognize any gain, other income or loss upon the issuance of
the subscription rights, the lapse of the subscription rights, or the receipt of
payment for shares of Series R Preferred Stock upon exercise of the subscription
rights.



                                       65
<PAGE>

LEGAL MATTERS

     Brobeck, Phleger & Harrison LLP will deliver an opinion to us about the
validity of the issuance of the shares of our Series R Preferred Stock.


                                    EXPERTS

     Ernst & Young LLP, independent auditors, have audited our financial
statements included in our Annual Report on Form 10-K for the year ended
December 31, 1998, as set forth in their report (which contains an explanatory
paragraph describing conditions that raise substantial doubt about our ability
to continue as a going concern as described in Note 1 to the financial
statements), which is included in this prospectus and in the registration
statement. Our financial statements are included in reliance on Ernst & Young
LLP's report, given on their authority as experts in accounting and auditing.


                                       66
<PAGE>

                           SHAMAN PHARMACEUTICALS, INC
                          INDEX TO FINANCIAL STATEMENTS


Report of Independent Auditors..............................................F-2

Balance Sheets as of December 31, 1997 and 1998.............................F-3

Statements of Operations for the years ended December 31, 1996, 1997,
  and 1998..................................................................F-4

Statements of Stockholders' Equity for the years ended December 31,
  1996, 1997, 1998..........................................................F-5

Statements of Cash Flows for the years ended December 31, 1996, 1997,
  1998......................................................................F-7

Notes to Financial Statements...............................................F-8


                                       F-1
<PAGE>



               REPORT OF ERNST & YOUNG, LLP, INDEPENDENT AUDITORS

The Board of Directors and Stockholders of
Shaman Pharmaceuticals, Inc.

     We have audited the accompanying balance sheets of Shaman Pharmaceuticals,
Inc. as of December 31, 1998 and 1997, and the related statements of operations,
stockholders' equity, and cash flows for each of the three years in the period
ended December 31, 1998. 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 Shaman Pharmaceuticals, Inc.
at December 31, 1998 and 1997, and the results of our operations and our cash
flows for each of the three years in the period ended December 31, 1998, 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 more fully described in Note 1, the
Company had cash, cash equivalents and short-term investments at December 31,
1998 aggregating $9.2 million which are not sufficient to enable the Company to
pay its existing liabilities and to fund its operations through December 31,
1999. The Company has incurred recurring operating losses and has total
liabilities at December 31, 1998 in excess of its available cash resources.
These conditions raise substantial doubt about the Company's ability to continue
as a going concern. Management's plans in regard to these matters are also
described in Note 1. The financial statements referred to above do not include
any adjustments to reflect the possible future effects on the recoverability and
classification of assets or the amounts and classification of liabilities that
may result from the outcome of this uncertainty.





Palo Alto, California
February 11, 1999, except for Note 10, as to which the date is June ___, 1999
- --------------------------------------------------------------------------------

     The foregoing report is in the form that will be signed upon the completion
of the one-for-twenty  reverse stock split described in Note 10 to the financial
statements.

                                    ERNST & YOUNG LLP



Palo Alto, California
May ___, 1999




                                       F-2
<PAGE>




                          SHAMAN PHARMACEUTICALS, INC.

                                 BALANCE SHEETS

<TABLE>
<CAPTION>

                                                            December 31,
                                                   ----------------------------
                                                       1998             1997
                                                   -----------      -----------
                         ASSETS
<S>                                              <C>             <C>

Current assets:
  Cash and cash equivalents                      $   5,887,496   $   11,340,702
  Short-term investments                             3,277,197       10,079,943
  Amounts due from related parties                     208,898          192,551
  Prepaid expenses and other current assets            283,804          553,507
                                                   -----------      -----------
         Total current assets                        9,657,395       22,166,703

  Property and equipment:
     Laboratory equipment                            6,336,564        6,211,182
     Computer equipment and furniture                1,474,914        1,158,869
     Leasehold improvements                          7,266,066        7,351,827
                                                   -----------      -----------
                                                    15,077,544       14,721,878
     Less: accumulated depreciation and
              amortization                         (11,963,876)     (10,749,738)
                                                   -----------      -----------
                                                     3,113,668        3,972,140
   Other assets                                        368,080          613,657
                                                   -----------      -----------
         Total assets                            $  13,139,143    $  26,752,500
                                                 =============    =============


               LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable and other accrued expenses    $   1,515,230    $     925,701
  Accrued clinical trial costs                       2,051,134        1,689,659
  Accrued professional fees                            948,374          718,625
  Accrued compensation                                 326,797          368,272
  Advances--contract research                          968,750        1,133,605
  Current installments of long-term obligations      2,803,861        2,783,976
                                                 -------------    -------------
         Total current liabilities                   8,614,146        7,619,838

Long-term obligations, excluding current
  installments                                       2,415,137        4,017,979
Senior convertible notes                                     -        9,967,044
Stockholders' equity:
  Preferred stock, $0.001 par value; issuable in
    series; 1,000,000 shares authorized; 519,533
    and 400,000 convertible shares issued and
    outstanding at December 31, 1998 and 1997,
    respectively (Liquidation preference at
    December 31, 1998 and 1997 -- $18,429,310 and
    $3,258,800, respectively)                              520              400
  Common stock, $0.001 par value; 40,000,000 shares
    authorized; 1,519,147 shares and 889,802
    shares issued and outstanding at December 31,
    1998 and 1997, respectively                          1,519              890
  Additional paid-in capital                       152,727,444      117,181,430
  Deferred compensation and other adjustments         (185,850)        (124,910)
  Accumulated deficit                             (150,433,773)    (111,910,171)
                                                 -------------    -------------
          Total stockholders' equity                 2,109,860        5,147,639
                                                 -------------    -------------
          Total liabilities and stockholders'
             equity                              $  13,139,143    $  26,752,500
                                                 =============    =============
</TABLE>

               See accompanying notes to financial statements.




                                      F-3
<PAGE>



                          SHAMAN PHARMACEUTICALS, INC.

                            STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>

                                                Years Ended December 31,
                                    -------------------------------------------
                                          1998           1997           1996
                                    -------------  -------------  -------------
<S>                                  <C>            <C>            <C>
Revenue from collaborative
  agreements                         $  2,659,856   $  3,500,000   $  3,406,250
Operating expenses:
  Research and development             32,393,374     24,140,246     19,138,190
  General and administrative            5,565,066      4,833,489      3,537,157
                                    -------------  -------------  -------------
     Total operating expenses          37,958,440     28,973,735     22,675,347
                                    -------------  -------------  -------------
Loss from operations                  (35,298,584)   (25,473,735)   (19,269,097)
Interest income                           550,227      1,217,884      1,082,618
Interest expense                       (2,033,004)    (5,032,684)      (603,330)
                                   
Net loss                              (36,781,361)   (29,288,535)   (18,789,809)
Deemed dividend on Preferred Stock     (1,742,241)             -              -
                                    -------------  -------------  -------------
Net loss applicable to
  Common Stockholders                $(38,523,602)  $(29,288,535)  $(18,789,809)
                                    =============   ============   ============
Basic and diluted net loss per
  common share                       $     (38.31)  $     (34.44)  $     (27.85)
                                     =============  ============   ============
Shares used in calculation of
  basic and diluted net loss
  per common share                      1,005,700        850,500        674,800
                                    =============   ============   ============
</TABLE>

               See accompanying notes to financial statements.



                                      F-4
<PAGE>

<TABLE>
<CAPTION>

                                             SHAMAN PHARMACEUTICALS, INC.

                                          STATEMENTS OF STOCKHOLDERS' EQUITY  
                                For the Years Ended December 31, 1996, 1997, and 1998

                                                           Deferred
             Convertible                     Additional      Compensation                          Total
              Preferred        Common         Paid-In            and           Accumulated      Stockholders'
                Stock           Stock         Capital           Other            Deficit           Equity
                                                              Adjustments
             ------------    -----------    -------------    -------------    --------------    --------------
<S>          <C>             <C>            <C>             <C>              <C>            <C>
Balance at
  December 31,
    1995             $ -     $       663    $  88,183,521    $   (146,956)    $ (63,831,827)     $  24,205,401
Issuance of
  13,699 shares
  of common
  stock upon
  the exercise
  of stock
  options              -              14          440,066               -                 -            440,080

Issuance of
  400,000 shares
  of series A
  convertible
  preferred
  stock              400               -        3,057,823               -                 -          3,058,223
Issuance of
  19,446 shares
  of common
  stock in
  connection with
  Lipha/Merck
  collaboration        -              19        2,972,203               -                 -          2,972,222
Unrealized
  loss on
  available-for-sale
  securities           -               -                -         (26,458)                -            (26,458)
Amortization and
  reversals of
  deferred
  compensation         -               -          (35,933)        153,164                 -            117,231
Net loss               -               -                -               -       (18,789,809)       (18,789,809)
                  ------          ------         --------        --------       ------------       ------------
Balance at
  December 31,
    1996             400             696       94,617,680         (20,250)      (82,621,636)        11,976,890
Issuance of
  974 shares
  of common
  stock upon
  the exercise
  of stock
  options              -               1           64,155               -                 -             64,156
Issuance of
  100,000 shares
  of common
  stock in
  connection with
  a registered
  direct public
  offering in
  January 1997,
  net of issuance
  costs of $.93
  million              -             100        8,070,310               -                 -          8,070,410
Issuance of
  80,000 shares
  of common
  stock in
  connection with
  a registered
  direct public
  offering in
  April 1997,
  net of issuance
  costs of $.13
  million              -              80        7,824,174               -                 -          7,824,254
Issuance of
  10,039 shares
  of common
  stock in
  connection with
  Lipha/Merck
  collaboration        -              10        1,492,529               -                 -          1,492,539
Issuance of
  2,755 shares
  of common
  stock upon
  conversion
  of senior
  convertible
  notes in
  November 1997        -               3          223,160               -                 -            223,163
Unrealized
  loss on
  available-for-sale
  securities           -               -                -          (9,720)                -             (9,720)
Deferred
  compensation
  related to
  granting of
  options to
  non-employees,
  net of
  amortization
  and reversals        -               -          240,282         (94,940)                -            145,342
Value ascribed
  to warrants
  issued in
  conjunction
  with secured
  loan                 -               -          648,000               -                 -            648,000
Value ascribed to
  in-the-money
  conversion
  option of
  senior
  convertible
  notes                -               -        3,692,140               -                 -          3,692,140
Value ascribed
  to warrants
  issued in
  conjunction
  with senior
  convertible
  notes                -               -          309,000                -                -            309,000
Net loss               -               -                -                -      (29,288,535)       (29,288,535)
                   -----        --------     ------------       ----------      ------------       ------------
Balance at
  December 31,
    1997            $400         $   890     $117,181,430        $(124,910)   $(111,910,171)        $5,147,639

</TABLE>



                                      F-5
<PAGE>

<TABLE>
<CAPTION>

                                             SHAMAN PHARMACEUTICALS, INC.

                                   STATEMENTS OF STOCKHOLDERS' EQUITY (continued)
                                For the Years Ended December 31, 1996, 1997, and 1998

                                                              Deferred
             Convertible                     Additional      Compensation                          Total
              Preferred        Common         Paid-In            and           Accumulated      Stockholders'
                Stock           Stock         Capital           Other            Deficit           Equity
                                                              Adjustments
             ------------    -----------    -------------    -------------    --------------    --------------
<S>          <C>             <C>            <C>             <C>              <C>            <C>
Balance at
  December 31
    1997            $400         $   890    $117,181,430       $ (124,910)    $(111,910,171)        $5,147,639
Issuance of
  792 shares
  of common
  stock upon
  the exercise
  of stock
  options              -               1          21,714                -                 -             21,715
Issuance of
  3,116 shares
  of common
  stock to
  employees from
  the 1998 special
  issuance
  plan                 -               3          80,756                -                 -             80,759
Issuance of
  37,360 shares
  of common
  stock to
  consultants for
  consulting
  services
  rendered             -              37       1,074,073                -                 -          1,074,110
Sale of
  57,762 shares
  of common
  stock in
  connection with
  Lipha/Merck
  collaboration        -              58       2,499,942                -                 -          2,500,000
Deferred
  compensation
  related to
  granting of
  options to
  non-employees,
  net of
  amortization
  and reversals        -               -         162,464          (75,849)                -             86,615
Change in unrealized
  gain/loss on
  available-for-sale
  securities           -               -               -           14,909                 -             14,909
Value ascribed to
  Warrants issued
  in conjunction
  with Series B
  Convertible
  Preferred Stock
  ($1,462,860)         -               -               -                -                 -                  -
Issuance of
  10,082 shares
  of common
  stock  in
  connection with
  senior convertible
  notes quarterly
  interest
  payment              -              10         650,531                -                 -            650,541
Issuance of
  53,810 shares
  of common
  stock upon
  the conversion
  of 1,209 shares
  of Series D
  Convertible
  Preferred
  Stock               (1)             54             (53)               -                 -                  -
Issuance of
  128,563 shares
  of common
  stock upon
  the conversion
  of senior
  convertible
  notes                -             129       5,453,055                -                 -          5,453,184
Sale of
  140,880 shares
  of convertible
  preferred stock
  in connection
  with the
  Series C
  Convertible
  Preferred
  Stock
  Offering,
  net of
  issuance
  costs of $1.5
  million            141               -      12,598,553                 -                -         12,598,694
Value ascribed
  to in-the-money
  conversion
  option of
  Series C
  Convertible
  Preferred
  Stock                -               -         678,636                 -                -            678,636
Issuance of
  93,077 shares
  of common
  stock
  upon the
  conversion of
  24,922 shares
  of Series C
  Convertible
  Preferred
  Stock              (25)             93             (68)               -                -                  -
Issuance of
  4,179 shares
  of common
  stock in
  payment of
  Dividends on
  Series C
  Convertible
  Preferred
  Stock                -               4              (4)               -                -                  -
Sale of
  240,604 shares
  of common stock
  in connection
  with the
  private
  placement
  offering in
  December 1998,
  net of issuance
  costs of $.13
  million              -             240        7,086,704                -                -          7,086,944
Issuance of
  4,784 shares
  of Series D
  Convertible
  Preferred Stock
  in exchange
  for cancellation
  of senior
  convertible
  note                 5               -        4,176,106                -               -           4,176,111
Value ascribed to
  in-the-money
  conversion option
  of Series D
  Convertible
  Preferred
  Stock                -               -        1,063,605                -               -           1,063,605
Value ascribed to
  Warrants issued in
  conjunction with
  Series D
  Convertible
  Preferred Stock
  ($943,680)           -               -                -                -               -                   -
Net loss               -               -                -                -     (38,523,602)        (38,523,602)
                   -----       ----------   -------------     -------------    ------------        ------------
Balance at
 December 31,
   1998             $520         $ 1,519     $152,727,444        $(185,850)  $(150,433,773)        $(2,109,860)
                 =======     ===========    =============     =============   =============       ============
</TABLE>
               See accompanying notes to financial statements.



                                      F-6
<PAGE>


<TABLE>
<CAPTION>
                                                   SHAMAN PHARMACEUTICALS, INC.

                                                     STATEMENTS OF CASH FLOWS
                                           Increase (Decrease) in Cash and Cash Equivalents

                                                                                      Years ended December 31,
                                                                       --------------------------------------------------
                                                                           1998              1997              1996
                                                                       -------------     -------------     --------------
<S>                                                                    <C>               <C>               <C>
Operating activities:
  Net loss applicable to Common Shareholders                           $ (38,523,602)    $ (29,288,535)    $ (18,789,809)
  Adjustments to reconcile net loss to net cash
    used in operating activities:
        Depreciation                                                       1,214,139         1,718,167         2,245,860
        Amortization of warrants and  deferred equity costs                  286,664           390,729           117,231
        Loss on disposal of fixed assets                                      19,834                 -                 -
        Interest expense on issuance of senior convertible notes                   -         3,692,140                 -
        Deemed dividend on preferred stock                                 1,742,241                 -                 -
        Issuance of common stock to consultants for services rendered      1,074,110                 -                 -
        Other compensation                                                    80,759                 -                 -
        Payment of interest in common stock                                  328,743                 -                 -
  Changes in operating assets and liabilities:
        Prepaid expenses, current assets and other assets                    755,280           628,198           (80,148)
        Accounts payable, accrued professional fees,
           accrued compensation, accrued clinical trial
           costs and contract research advances                              974,423          (748,327)        2,021,220
                                                                        ------------      ------------      ------------
Net cash used in operating activities                                    (32,047,409)      (23,607,628)      (14,485,646)
                                                                        ------------      ------------      ------------
Investing activities:
  Purchases of available-for-sale investments                             (5,255,947)      (14,562,627)      (10,872,811)
  Maturities of available-for-sale investments                             5,032,892         4,954,640        26,325,454
  Sales of available-for-sale investments                                  7,040,710                 -         1,494,000
  Capital expenditures                                                      (375,501)         (913,382)         (864,729)
  Employee loans, net of repayments                                         (256,347)                -                 -
                                                                        ------------      ------------      ------------
Net cash provided by (used in) investing activities                        6,185,807       (10,521,369)       16,081,914
                                                                        ------------      ------------      ------------
Financing activities:
  Proceeds from issuance of preferred stock, net                          12,598,694                 -         3,058,223
  Proceeds from issuance of common stock, net                              9,608,659        17,446,683         3,412,302
  Proceeds from issuance of long-term  obligations                                 -         5,000,000           600,000
  Proceeds from issuance of senior convertible notes, net                          -         9,479,039                 -
  Principal payments on long-term obligations                             (2,310,080)       (2,936,297)       (1,825,665)
  Proceeds from asset financing arrangements                                 511,123           429,023                 -
                                                                        ------------      ------------      ------------
Net cash provided by financing activities                                 20,408,396        29,418,448         5,244,860
                                                                        ------------      ------------      ------------
Net increase (decrease) in cash and cash equivalents                      (5,453,206)       (4,710,549)        6,841,128
Cash and cash equivalents at beginning of period                          11,340,702        16,051,251         9,210,123
                                                                        ------------      ------------      ------------
Cash and cash equivalents at end of period                              $  5,887,496      $ 11,340,702      $ 16,051,251
                                                                        ============     =============     =============

Supplemental information
  Interest paid                                                         $    605,069      $    538,891      $    603,330
                                                                        ============     =============     =============
</TABLE>
               See accompanying notes to financial statements.


                                      F-7
<PAGE>


                          SHAMAN PHARMACEUTICALS, INC.

                          NOTES TO FINANCIAL STATEMENTS

1.  Summary of Significant Accounting Policies

General

      To date, Shaman  Pharmaceuticals has been primarily focused on discovering
and developing novel pharmaceutical products for major human diseases by
isolating and optimizing active compounds found in tropical plants with a
history of medicinal use. We have conducted human clinical trials with our three
lead product candidates -- SP-303/Provir (Phase III/II), nikkomycin Z (Phase I)
and SP-134101 (Phase I) -- targeting five indications. Due to unforeseen delays
and costs necessary to complete additional necessary trials for our lead
compound, SP-303/Provir for the treatment of diarrhea in people with AIDS, we
have chosen to discontinue all pharmaceutical development, manufacturing and
marketing activities. We intend to sell or out-license worldwide marketing
rights to our pharmaceutical assets. We plan to focus our efforts on our
Botanicals division.

Matters Affecting Ongoing Operations

      The accompanying  financial statements have been prepared assuming that we
will continue as a going concern. We have cash, cash equivalents and short-term
investments at December 31, 1998 aggregating $9.2 million which are not
sufficient to enable us to pay existing liabilities and fund our operations
through December 31, 1999. We have total liabilities in excess of our available
cash resources at December 31, 1998. We have had recurring net losses, including
a net loss applicable to common stockholders of $38.5 million in the year ended
December 31, 1998, and have an accumulated deficit of $150.4 million at December
31, 1998. These conditions raise substantial doubt about our ability to continue
as a going concern.

      To address these matters,  on February 1, 1999, we announced and initiated
the implementation of a Restructuring Plan which resulted in the immediate
cessation of all pharmaceutical research and development activities, a reduction
in workforce of 60 employees, and will result in the closing down of all of the
operations of our pharmaceutical business (see Note 2). After the implementation
of the Restructuring Plan, we expect our available cash resources to be
substantially used before the end of June 1999.

      Further,  we intend to sell or enter  into  outlicensing  agreements  with
respect to all of our current pharmaceutical research programs including
SP-303/Provir, nikkomycin Z and SP-134101. We are currently negotiating for the
termination of our remaining research and development collaboration agreement
with Lipha S.A., a wholly-owned subsidiary of Merck KGaA, Darmstadt, Germany
("Lipha/Merck"). We intend to focus our future efforts on the development and
commercialization of botanical dietary supplements derived from tropical plant
sources.

Revenue Recognition

      Revenue under our collaborative  research agreements is recognized ratably
as costs are incurred by us in accordance with the performance requirements of
the agreements. Non-refundable payments that are not dependent on future
performance under collaborative agreements are recognized as revenue when
received. Payments received which are still subject to future performance
requirements are deferred until earned. Revenues from achievement of milestone
events are recognized when the funding party agrees that the scientific or
clinical results stipulated in the agreement have been met. Costs of contract
revenue approximate such revenue and are included in research and development
expenses.

Research and Development Expense

      Research and  development  expense  consists of  independent  research and
development   costs  and  the  costs   associated   with  work  performed  under
collaborations.    Research   and   development   costs   include   direct   and
research-related overhead expenses and are expensed as incurred.

Stock-Based Compensation

      In October 1995, the Financial  Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards, "Accounting for Stock-Based
Compensation" ("SFAS 123") which encourages, but does not require, companies to


                                      F-8
<PAGE>

record compensation expense for stock-based employee compensation plans at fair
value. We have elected to follow the disclosure requirements of SFAS 123 for the
year ended December 31, 1998, 1997 and 1996 and will continue to measure
stock-based compensation to employees in accordance with APB Opinion No. 25,
"Accounting for Stock Issued to Employees." Note 8 contains a summary of the pro
forma effects to reported net loss applicable to common stockholders and net
loss per common share for 1998, 1997 and 1996 as if we had elected to recognize
compensation expense based on the fair value of options granted as described by
SFAS 123.

      We grant stock  options to employees  and  directors for a fixed number of
shares with an exercise price equal to the fair market value of shares at the
date of grant. We account for stock option grants to employees and directors in
accordance with APB Opinion No. 25, Accounting for Stock Issued to Employees
and, accordingly, recognize no compensation expense for the stock option grants
to employees and directors.

Per Share Data

      Net loss per share is computed using the weighted average number of shares
of common stock outstanding. The impact of stock options and other common stock
equivalents have been excluded from the computation in all years presented as
they are antidilutive.

Comprehensive Loss

      As of January 1, 1998, we adopted  Financial  Accounting  Standards  Board
("FASB") Statement No. 130, Reporting Comprehensive Income ("SFAS 130"). SFAS
130 established new rules for the reporting and displaying of comprehensive
income and its components; however, the adoption of this statement had no impact
on our net loss or total stockholders' equity. SFAS 130 requires unrealized
gains or losses on our available for sale securities, which prior to adoption
were reported in stockholder's equity, to be included in other comprehensive
income (loss). Our comprehensive loss was not materially different from our net
loss applicable to common stockholders in 1998, 1997 and 1996.

Cash, Cash Equivalents, Investments and Concentration of Credit Risk

      We consider all highly liquid  investments  with  remaining  maturities of
three months or less at time of purchase to be cash equivalents. Investments
with maturities of less than one year from the balance sheet date and with
original maturities greater than 90 days are considered short-term investments.
Investments with maturities greater than one year from the balance sheet date
are considered long-term investments. Investments consist primarily of
commercial paper, investments in government securities, corporate bonds and
asset-backed securities. These investments typically bear minimal risk. This
diversification of risk is consistent with our policy to maintain high liquidity
and ensure safety of principal. We maintain our cash, cash equivalents and
investments in accounts with several United States banks and brokerage houses.

      We determine the appropriate classification of debt securities at the time
of purchase and re-evaluate such determination as of each balance sheet date. As
of December 31, 1998 and 1997, we have classified our entire investment
portfolio as available-for-sale. Available-for-sale securities are carried at
fair value, with the unrealized gains and losses, net of tax, included in other
comprehensive income. The amortized cost of debt securities in this category is
adjusted for amortization of premiums and accretion of discounts to maturity.
Such amortization is included in interest income. Realized gains and losses and
declines in value judged to be other-than-temporary on available-for-sale
securities are included in interest income or expense. The cost of securities
sold is based on the specific identification method. Interest and dividends on
securities classified as available-for-sale are included in interest income.

Property and Equipment

      Property and equipment are stated at cost.  Depreciation  of equipment and
furniture is provided on a straight-line basis over the estimated useful lives
of the respective assets, which range from three (computer equipment and
furniture) to five (laboratory equipment) years. Equipment held under capital
leases is amortized using the straight-line method over the shorter of the lease
term or estimated useful life of the asset. Leasehold improvements are amortized
on a straight-line basis over the remaining life of the lease.



                                       F-9
<PAGE>

Use of Estimates

      The  preparation  of financial  statements  in conformity  with  generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.

Carrying Value of Long-Lived Assets and Long-Lived Assets to be Disposed
Of

      In accordance with Financial Accounting Standards Board Statement No. 121,
"Accounting for the Impairment of Long-Lived Assets and for Long Lived Assets to
be Disposed Of," we record impairment losses on long-lived assets when events
and circumstances indicate that the assets might be impaired and the
undiscounted cash flows estimated to be generated by those assets are less than
the carrying amounts of those assets. Based on our estimate of future
undiscounted cash flows, except for a reserve included in the estimated
restructuring charge (see Note 2), we expect to recover the carrying amounts of
our long-lived assets. Nonetheless, it is reasonably possible that the estimate
of undiscounted cash flows may change in the near term resulting in the need to
write-down those assets to fair value.

Segment Reporting

      In June 1997, the FASB issued SFAS No. 131,  Disclosures about Segments of
an Enterprise and Related Information ("FAS131"). SFAS 131 establishes standards
for the way that public business enterprises report information about operating
segments in annual financial statements and requires that those enterprises
report selected information about operating segments in interim financial
reports. It also establishes standards for related disclosures about products
and services, geographic areas, and major customers. We have determined that in
1998, 1997 and 1996, we operated in only one segment.

Reclassification

      Certain  prior  year  amounts  have been  reclassified  to  conform to the
current year's presentation.

2.  Restructuring Plan

      On  February 1, 1999,  we  announced  and  initiated  implementation  of a
restructuring plan which resulted in the closing down of the operations of our
pharmaceutical business. We now intend to out-license worldwide marketing rights
to all our pharmaceutical compounds and will focus our efforts on the
development and commercialization of botanical dietary supplements through
botanicals division. The restructuring plan includes: cessation of
pharmaceutical research and development activities and related operations; sale
or outlicensing of all of our current pharmaceutical research programs;
reduction in force of approximately 60 employees (65% of our workforce);
dedication of initially 12 employees (as of February 26, 1999, 5 employees
remain) to the process of closing down the pharmaceutical business; termination
of the research and development contract with Lipha/Merck; settlement of
outstanding long-term equipment financing obligations; sale or disposal of all
of our fixed assets that are not needed for our botanicals business; and
sub-lease a portion of the facility.

      The  termination  of 60 employees  occurred on February 1, 1999. We are in
the process of finalizing an estimate of the costs of the restructuring which
will be recorded in the first quarter of 1999. We expect that such charge will
range from $2,400,000 to $5,000,000.

3.  Collaborative Relationships

      In September  1996,  we entered into a five-year  collaborative  agreement
with Lipha/Merck to jointly develop Shaman's antihyperglycemic drugs. Upon
signing the collaboration, we received an annual research fee of $1.5 million
which was amortized to revenue over twelve months as the work was performed. We
also received approximately $3 million for 19,446 shares of common stock priced
at $154.20 per share, representing a 20% premium to the weighted average price
of the common stock at the time of purchase. In exchange for development and
marketing rights in all countries except Japan, South Korea, and Taiwan (which
are covered under an earlier agreement between Shaman and Ono Pharmaceutical Co.
Ltd. Osaka, Japan ("Ono"), Lipha/Merck agreed to provide up to $9.0 million in
research payments and up to $10.5 million in equity investments priced at a 20%
premium to a multi-day volume weighted average price of common stock at the time
of purchase. The research payments were recognized as revenue ratably as the
related costs are incurred by us in the performance of our obligations to
perform certain research and clinical trial activities. The agreement also
provided for additional preclinical and clinical milestone payments to us in
excess of $10.0 million per compound for each antihyperglycemic drug developed


                                      F-10
<PAGE>

and commercialized. Lipha/Merck agreed to bear all pre-clinical, clinical,
regulatory and other development expenses associated with the compounds selected
under the agreement. Preclinical and clinical milestone payments would be
recognized as revenue as certain preclinical hurdles are met and as certain
phases of the clinical trials and the FDA approval process were completed. In
addition, as products were commercialized, Shaman would receive royalties on all
product sales outside the United States and up to 50% of the profits (if we
exercise our co-promotion rights) or royalties on all product sales in the
United States. Certain of the milestone payments would be credited against
future royalty payments, if any, due to us from sales of products developed
pursuant to the agreement.

      In December 1998, we renegotiated the terms of the existing agreement with
Lipha/Merck. Under the new terms, we forgave $6.0 million in aggregate payments
due over the remaining term of the original agreement in exchange for a one-time
up-front payment of an aggregate of $2.0 million, consisting of a $1.0 million
research payment (which remains recorded as deferred revenue that we have not
yet earned) and a $1.0 million equity investment.

      For the year ended December 31, 1998,  Shaman  recognized  $1.9 million in
revenue from the Lipha/Merck collaboration. In addition, we received a total
$2.5 million for issuance of 57,762 shares of common stock (40,650 shares priced
at $37.00 per share in September 1998 and 17,112 shares priced at $58.40 per
share in December 1998), each representing a 20% premium to the weighted average
price of common stock at the time of purchase. Revenues from Lipha/Merck
accounted for 70%, 43% and 12% of total revenues earned in 1998, 1997 and 1996
respectively.

      On  February  1,  1999,  we  discontinued  all  research  and  development
activities related to the collaborative agreement. We are currently in
negotiations with Lipha/Merck, for the discontinuation of this research
agreement. There will be no further research payments from Lipha/Merck.

      In May 1995, we entered into a collaborative  agreement with Ono providing
for, among other things, three years of funding for the research and development
of compounds for the treatment of Type II diabetes. Under the agreement, Shaman
was obligated to screen 100 diabetes-specific plants per year in vivo, isolate
and identify active compounds, and participate in any medicinal chemistry
modification. In turn, Ono provided us with access to Ono's preclinical and
clinical development capabilities through proprietary in vitro assays and
medicinal chemistry effort. Ono's development and commercialization rights are
for the countries of Japan, South Korea and Taiwan. Under the terms of the
agreement, Ono provided $7.0 million in collaborative research funding and will
pay preclinical and clinical milestone payments of $4.0 million per compound for
each antidiabetic drug that is commercialized.

      We received an additional  $1.0 million  payment  (beyond the $7.0 million
commitment) in December 1996 for enhanced access rights to these compounds. For
the years ended December 31, 1998, 1997 and 1996, Shaman recognized $790,000,
$2.0 million and $3.0 million, respectively in revenue from the Ono
collaboration. Revenues from Ono accounted for 30%, 57% and 88% of total
revenues earned in 1998, 1997 and 1996, respectively.

      In May  1998,  our  collaborative  agreement  with  Ono,  and the  ongoing
research and development funding received pursuant thereto, expired under the
original terms thereof and was not renewed. Under the agreement, Ono will
continue to provide milestone payments and royalties to us on any resulting
products Ono develops from compounds identified during the three-year term of
the agreement.

      Costs  associated  with  revenue  from these  collaborations  totaled $8.2
million, $11.4 million and $11.6 million for the year ended December 31, 1998,
1997 and 1996, respectively, and are included in research and development
expenses in the accompanying financial statements.


                                      F-11
<PAGE>

4.  Investments

   The following is a summary of available-for-sale securities (in thousands):

 <TABLE>
<CAPTION>
                                                December 31, 1998
                                  --------------------------------------------
                                            Gross        Gross      Estimated
                                          Unrealized   Unrealized     Fair
                                    Cost    Gains       Losses       Value
                                  ------- ----------   ----------   ----------
<S>                               <C>       <C>         <C>           <C>
   U.S. Treasury securities
     and government obligations   $ 2,255   $     --    $     (5)     $ 2,250
   U.S. corporate bonds             1,000         --          --        1,000
   U.S. corporate commercial
     paper and other                4,984         --         (10)       4,974
                                  -------   --------     --------    --------
        Total                     $ 8,239   $     --    $    (15)     $ 8,224
                                  =======   ========     ========    ========


 Above amounts are included in the balance sheet as follows:

    Cash and cash equivalents     $ 4,957        --     $    (10)     $ 4,947
    Short-term investments          3,282        --           (5)       3,277
                                  -------   --------     --------    --------
        Total                     $ 8,239   $     --    $    (15)     $ 8,224
                                  =======   ========     ========    ========




                                               December 31, 1997
                                  --------------------------------------------
                                            Gross        Gross      Estimated
                                          Unrealized   Unrealized     Fair
                                    Cost    Gains       Losses       Value
                                  ------- ----------   ----------   ----------
  U.S. Treasury securities
     and government obligations   $ 4,625   $     --    $    (10)     $ 4,615
   U.S. corporate bonds             3,000         --          --        3,000
   U.S. corporate commercial
     paper and other               10,810         --         (20)      10,790
                                  -------   --------     --------    --------
        Total                     $18,435   $     --    $    (30)     $18,405
                                  =======   ========     ========    ========


 Above amounts are included in the balance sheet as follows:

    Cash and cash equivalents     $ 8,345        --     $    (20)     $ 8,325
    Short-term investments         10,090        --          (10)      10,080
                                  -------   --------     --------    --------
        Total                     $18,435   $     --    $    (30)     $18,405
                                  =======   ========     ========    ========

</TABLE>


      The average  remaining  maturity of the portfolio was  approximately  less
than one month as of December 31, 1998, and approximately four and one-half
months at December 31, 1997, respectively.

      The  estimated  fair  value  amounts  have  been  determined  by us  using
available market information and appropriate valuation methodologies. However,
judgment is required in interpreting market data to develop the estimates of
fair value.

5.  Long-Term Obligations

      At  December  31,  1998,  long-term  obligations  consist of  secured  and
unsecured term loans and secured borrowings used to acquire property and
equipment, capital lease arrangements and a leasehold improvement financing
obligation.

      In May 1997,  we obtained a $5.0 million term loan to payoff  pre-existing
debt, finance capital asset acquisitions and finance continued research and
clinical development. The loan is payable in thirty-six equal monthly
installments and the interest rate is 14.58%. The lender was granted warrants to
purchase 10,000 shares of common stock at $125.00 per share, which are
exercisable over a ten-year period. We have attributed a value of $648,000 to
these warrants. This amount has been recorded as a discount on the related debt
and is being amortized as interest expense over the term of the loan.

      In June 1997, we issued $10.4 million of senior  convertible notes with an
original maturity of August 2000. Interest, at 5.5% per annum, on the notes was
payable in common stock or cash at our option. Initially, the notes were
convertible into common stock at 100% of the low trading price during a
designated time period prior to conversion provided that the conversion price
would not be less than $110.00 per share. Starting in November 1997, the notes
were convertible into common stock at a 10% discount from the low trading price
during a designated time period prior to the conversion, with a floor of $110.00
through March 31, 1998, pursuant to a March 1998 amendment agreement with the
note holders whereby we issued to the note holders three-year warrants to
purchase an aggregate of 6,875 shares of common stock at an exercise price of
$150.00 per share as consideration for entering into the amendment agreement. We
have attributed a value of $309,000 to these warrants. This amount was recorded


                                      F-12
<PAGE>

as a discount on the related debt and was amortized as interest expense over the
term of the loan. Of the notes issued, $400,000 was issued to the placement
agent as part of the placement fee. We paid the placement agent an additional
$300,000 in cash. The placement fees and other offering costs have been
capitalized in other assets as deferred issuance costs and were amortized to
interest expense over the life of the notes to the extent the notes were not
converted to common stock. The net proceeds totaled approximately $9.5 million
after the placement agent's fees and other offering expenses. In connection with
the issuance of the notes, we recognized a non-cash charge in the amount of
$3,692,000, representing the value attributed to the in-the-money conversion
feature of the senior convertible notes.

      Through December 9, 1998, an aggregate  principal balance of approximately
$5.6 million of the Senior Convertible Notes was converted into an aggregate of
128,563 shares of common stock. On December 10, 1998, we issued to the note
holders an aggregate of 4,784 shares of our Series D Convertible Preferred Stock
in exchange for the cancellation of an aggregate of $4.8 million (including
accrued interest) of the notes.

      Equipment  borrowings  totaled $0 and  $401,555 at  December  31, 1998 and
1997, respectively. The borrowings carried interest at rates ranging from 10.7%
to 12.75% at December 31, 1997, were secured by the equipment acquired, and were
payable in monthly installments ranging from $10,000 to $156,000 through
December 1998.

      We also acquired certain equipment and furniture pursuant to capital lease
arrangements. The gross amount of equipment and furniture and the related
accumulated amortization recorded under capital leases included in property and
equipment are as follows:

<TABLE>
<CAPTION>
                                                   1998           1997
                                               ------------    ------------
<S>                                            <C>             <C>
             At December 31,
               Equipment and furniture         $ 2,401,286     $ 1,890,164
               Less accumulated amortization    (1,668,460)     (1,354,475)
                                               ------------    ------------
                                               $   732,826     $   535,689
                                               ============    ============
</TABLE>

     Amortization  of assets  acquired  under  capital  leases is  included  in
depreciation and amortization expense.

      In connection with the facility lease described in Note 6, we entered into
an agreement with the former tenant of the facility to acquire approximately
$1.5 million of tenant improvements by making annual payments to the former
tenant, including accrued interest of $540,000 in 1999 through 2002. The 1998
payment was not paid until January 1999.

Fair Value of Long-Term Obligations

      The  fair  values  of  our  long-term   obligations  are  estimated  using
discounted cash flow analyses based on our current incremental borrowing rate
for similar types of borrowing arrangements. The carrying amounts and fair
values of long-term obligations consisted of the following at December 31, 1998:

<TABLE>
<CAPTION>
                                            Carrying Value        Fair Value
                                            --------------        ----------
<S>                                          <C>                  <C>
      Leasehold improvements financings      $ 2,032,045          $ 2,213,059
      Secured Loan                           $ 2,724,189          $ 2,414,913

</TABLE>

      The carrying  value of our term loan  approximates  our fair value because
the interest rates on the note takedowns are periodically reset.


<PAGE>
                                   F-13

      At December 31, 1998,  future  payments on  long-term  obligations  are as
follows:

<TABLE>
<CAPTION>
                                                         Leasehold
                              Secured        Capital     Improvement
                               Loan          Leases      Financing       Total
                            -----------     --------     ------------    -----
<S>                       <C>              <C>          <C>          <C>

   1999                      $1,893,219    $ 257,889    $1,080,000   $3,231,108
   2000                         830,970      281,333       540,000    1,652,303
   2001                               -      270,635       540,000      810,635
   2002                               -       60,673       540,000      600,673
   2003                               -            -             -            -
                            -----------   ----------   -----------  -----------
   Total minimum payments    $2,724,189    $ 870,530    $2,700,000   $6,294,719
   Less amount representing
     interest (at rate
     ranging from 9.5%
     to 12.0%)                        -     (119,766)     (667,955)    (787,721)
                            -----------   ----------   -----------  -----------
                             2,724,189       750,764     2,032,045    5,506,998
   Less current
     installments           (1,893,219)     (219,232)     (691,410)  (2,803,861)
                            -----------   ----------   -----------  -----------
   Long-term obligations,
     excluding current
     installments            $ 830,970     $ 531,532    $1,340,635   $2,703,137
                            ===========   ==========   ===========   ==========

</TABLE>

6.   Commitments and Contingencies

      We  lease  our  research  and  office  facility  in South  San  Francisco,
California under a noncancellable agreement expiring 2003, with options to renew
for a total of ten years. We are required to pay operating costs, including
property taxes, utilities, insurance and maintenance.

      At December 31, 1998, the minimum  noncancellable  future rental  payments
under our operating leases are:

<TABLE>
<CAPTION>
<S>                      <C>       <C>
                         1999      $ 1,210,837
                         2000        1,544,555
                         2001        1,590,892
                         2002        1,638,618
                         2003          281,296
                                  ------------
                                   $ 6,266,198
                                  ============
</TABLE>



      Rent expense for each of the three years ended December 31, 1998, 1997 and
1996 was approximately $1,189,000 $1,154,000 and $1,348,000, respectively.

      We are involved in a litigation  and disputes  which are incidental to our
business. While it is not possible to predict or determine the outcome of such
litigation and disputes, or to provide an estimate of the losses, if any, that
may arise, we believe the costs associated with all of these actions will not
have a material effect on our consolidated financial position or liquidity, but
could possibly be material to the consolidated results of operations.

      Further,  product  liability claims may be asserted in the future relative
to events not known to management at the present time. We have insurance
coverage which we believe is adequate to protect against such product liability
losses as could materially affect our financial position.

7.  Contractual Agreements

      We have entered into license,  clinical trial and supply  agreements  with
universities, research organizations and commercial companies. Certain of these
agreements require payments of royalties on future sales of resulting products
and may subject us to minimum annual payments to our contract partners. In
addition, we signed an agreement in 1995 which could result in the payment of
milestone installments if certain development objectives are achieved. To date,
payments under these agreements have not been significant and, at December 31,
1998, related noncancellable commitments are immaterial.


                                      F-14
<PAGE>


8.  Stockholders' Equity

Preferred Stock

      We are authorized to issue  1,000,000  shares of preferred  stock (519,533
shares of which are issued and outstanding at December 31, 1998). Our Board of
Directors may set the rights and privileges of any preferred stock issued.

      On December 10, 1998, we and certain institutional  investors exchanged an
aggregate of $4.8 million (including accrued interest) of the Senior Convertible
Notes (the "Notes") for an aggregate of 4,784 shares of our Series D Convertible
Preferred Stock. Each share of Series D Convertible Preferred Stock is entitled
to receive, when, as, and if declared by the Board of Directors out of funds
legally available for such purpose, cumulative dividends at the rate of $55 per
annum. Dividends on the Series D Preferred Stock are payable in cash or shares
of our common stock or any combination of cash and shares of common stock, at
our option and are payable quarterly on February 1, May 1, August 1 and November
1 of each year. Each share of Series D Preferred Stock is convertible, at any
time, into common stock at the lesser of (a) $22.50 per share or (b) 90% of the
low trading price during a designated time period prior to the conversion. In
addition, the holders received an aggregate of 38,373 warrants to purchase
additional shares of common stock in exchange for surrendering the redemption
rights previously held by them under the Notes. The warrants were priced at 150%
of the average closing price for the month of December 1998. We have attributed
a value of $943,680 to these warrants. In connection with the issuance of the
Series D Preferred Stock, we also recognized a non-cash charge in the amount of
$1,063,605, representing the value attributed to the in-the-money conversion
feature of the Series D Preferred Stock.

      The  delisting  of our  common  stock  from  The  Nasdaq  National  Market
constituted an Optional Redemption Event (as defined in the Certificate of
Designation of Series D Preferred Stock) for the Series D Preferred Stock. In
connection therewith, on February 4, 1999, we issued a Control Notice (as
defined in the Certificate of Designation of Series D Preferred Stock) that
prevented the redemption of the Series D Preferred Stock. This Control Notice
will remain in effect for as long as we are not listed on any of The Nasdaq
National Market, The Nasdaq SmallCap Market, the American Stock Exchange or the
New York Stock Exchange. Delivery of the Control Notice had the effect of
increasing the annual dividend to $180 per share and adjusting the conversion
price of the Series D Preferred Stock to 80% of the amount the conversion price
would otherwise be.

      In October  1998,  we completed  the sale to the public of an aggregate of
140,880 shares of our Series C Convertible Preferred Stock for aggregate gross
proceeds of $14.1 million. Each share of Series C Preferred Stock is entitled to
receive cumulative dividends paid semi-annually to the holders of record of such
shares as follows: (i) an annual stock-on-stock dividend, paid in arrears, in
shares of common stock (calculated as the quotient of $10.00 divided by 85% of
the average closing price of the common stock for the 10-day trading period
ending three trading days prior to the date the dividend is paid); plus (ii) a
cash amount equaling 0.00005% of our U.S. net sales of our SP-303/Provir product
for the treatment of diarrhea, if any, for the preceding two calendar quarters
less $5.00. If, under Delaware law, we are unable to pay the cash portion of the
dividends, then the cash portion will be paid in shares of common stock (valued
at 85% of the average closing price of the common stock for the 10-day trading
period ending three trading days prior to the date on which the dividend is
paid). We intend to honor this royalty portion of the dividend through the sale
of our first botanical product, if any. Each share of the Series C Preferred
Stock was convertible for a period of 30 days after the first issuance and will
be convertible again commencing 12 months after the initial issuance date
(August 18, 1998) at the election of each holder, and automatically on the sixth
anniversary of the initial issuance date into greater of (a) 0.8333 shares of
common stock or (b) such number of shares of common stock as equals $100 (the
price paid per share of Series C Preferred Stock) divided by 85% of the average
closing price of the common stock reported by Nasdaq for the 10-day trading
period ending three trading days prior to the date of conversion. The common
stock is currently trading on The Nasdaq OTC Bulletin Board. During the initial
30-day conversion period for the Series C Preferred Stock, 24,922 shares of the
Series C Preferred Stock were converted into an aggregate of 93,077 shares of
common stock. In connection with the issuance of the Series C Preferred Stock,
we recognized a non-cash charge in the amount of $678,636.

      In June 1998, we entered into Stock  Purchase  Agreements  with certain of
our stockholders (the "Buyers") pursuant to which we acquired the right to sell
to the Buyers, subject to certain conditions up to an aggregate of 7,000 shares
of Series B Custom Convertible Preferred Stock for an aggregate purchase price
of $7,000,000. The Stock Purchase Agreements were terminated upon the closing of
the Series C Convertible Preferred Stock Financing in October 1998. As
consideration for entering into the Stock Purchase Agreements, we issued to the
Buyers warrants to purchase an aggregate of 17,500 shares of common stock. The
warrants are exercisable for a period of five years at an exercise price per
share equal to 115% of the average trading price of the common stock during
specified measurement periods. We have attributed a value of $1.5 million to
these warrants.

      In July 1996, we closed a private placement pursuant to Regulation S under
the Securities Act of 1933, as amended, in which it received gross proceeds of
$3.3 million for the sale of 400,000 shares of Series A Convertible Preferred


                                      F-15
<PAGE>

Stock and for the issuance of a six-year warrant to purchase 27,500 shares of
common stock at an exercise price of $203.60 per share. The Preferred Stock does
not carry a dividend obligation and will convert into common stock no later than
July 23, 1999 at a price per share between $120.00 and $163.00, depending on the
market value of common stock during the period prior to conversion. The holder
of preferred shares is entitled to a liquidation preference of 163.00 per share.

Common Stock

      In December  1992,  we adopted the 1992 Stock  Option Plan (the "Plan") as
the successor plan to our 1990 Stock Option Plan. The Plan will terminate on the
earlier of December 31, 2002 or the date on which all shares available for
issuance under the Plan have been issued or canceled. The Plan provides for two
separate components: the Discretionary Option Grant Program and the Automatic
Option Grant Program.

      Under the Discretionary  Option Grant Program,  options granted may either
be incentive options or non-statutory options. Incentive options may be granted
to employees at a price not less than the fair market value of Common Stock on
the grant date. Non-statutory options may be granted at a price determined by
the plan administrator. Each option granted is exercisable as determined by the
plan administrator, with a term not to exceed ten years. The Plan also allows
for the granting of options with repurchase rights and stock appreciation rights
at the discretion of the plan administrator.

      Under the Automatic  Option Grant Program,  each  individual who becomes a
non-employee board member on or after the effective date of the Plan is
automatically granted a non-statutory stock option to purchase 1,000 shares of
common stock. Further, each non-employee board member who has served as a member
for at least six months prior to the annual stockholders' meeting is
automatically granted an annual non-statutory stock option to purchase not more
than 375 nor less than 250 shares of common stock, depending on a calculation
based on the average selling price of the common stock. The exercise price of
each option granted is the fair value of the common stock on the date of grant.
These options have a ten-year term and vest over 24 months.

      On  September  18,  1998,  the Plan  Administrator  implemented  an option
cancellation/regrant program for all employees of the Company, including our
executive officers. Pursuant to that program, each such employee was given the
opportunity to surrender his or her outstanding options under the Plan with
exercise prices in excess of $25.62 per share in return for a new option grant
for the same number of shares but with an exercise price of $25.62 per share,
the closing selling price per share of common stock as reported on the Nasdaq
National Market on the September 18, 1998 grant date of the new option. Options
for a total of 92,760 shares with a weighted average exercise price of $105.50
per share were surrendered for cancellation, and new options for the same number
of shares were granted with the $25.62 per share exercise price. To the extent
the higher-priced option was exercisable for any option shares on the September
18, 1998 cancellation date, the new option granted in replacement of that option
will become exercisable for those shares in a series of twelve (12) successive
equal monthly installments upon the optionee's completion of each month of
service over the one (1) year period measured from the September 18, 1998 grant
date. The option will become exercisable for the remaining option shares in one
or more installments over the optionee's period of continued service, with each
such installment to vest on the same vesting date in effect for that installment
under the cancelled higher-priced option.

      On  October  20,  1998,  the  Plan  Administrator  implemented  an  option
cancellation/regrant program for the non-employee Board members (excluding the
Plan Administrator) and certain key independent consultants holding options
under the Plan. Pursuant to the October program, each such individual was given
the opportunity to surrender his or her outstanding options under the Plan with
exercise prices in excess of $28.75 per share in return for a new option grant
for the same number of shares but with an exercise price of $28.75 per share,
the closing selling price per share of common stock as reported on the Nasdaq
National Market on the October 20, 1998 grant date of the new option. Options
for a total of 29,232 shares with a weighted average exercise price of $122.46
per share were surrendered for cancellation, and new options for the same number
of shares were granted with the $28.75 per share exercise price. To the extent
the higher-priced option was exercisable for any option shares on the October
20, 1998 cancellation date, the new option granted in replacement of that option
will become exercisable for those shares in a series of twelve (12) successive
equal monthly installments upon the optionee's completion of each month of
service over the one (1) year period measured from the October 20, 1998 grant
date. The option will become exercisable for the remaining option shares in one
or more installments over the optionee's period of continued service, with each
such installment to vest on the same vesting date in effect for that installment
under the cancelled higher-priced option.

      Both programs provide for automatic acceleration of the exercise period in
the event of certain corporate transactions, including a merger, asset sale or
change in control of the Company.

      The 1990 Stock Option Plan  provided  for the  granting of  incentive  and
non-statutory stock options. Both types of options were immediately exercisable
and expire ten years from the date of grant. Vesting of optioned shares was
determined by the board of directors and generally occurred over a two- to
four-year period from the date of grant. At December 31, 1998, all options to
purchase common stock issued under this plan were vested.


      A summary of stock option activity is as follows:

                                      F-16
<PAGE>

<TABLE>
<CAPTION>

                                           Options Outstanding
                             --------------------------------------------------
                                                            Weighted      Weighted
                                                             Average      Average
                              Number        Price Per       Exercise     Fair Value
                             of Shares        Share           Price       At Grant
                                                                            Date
                             ---------   ---------------    ---------   -----------
<S>                         <C>           <C>               <C>       <C>
Balance at
   December 31, 1996          105,099     $1.20--$265.00     $109.60
  Granted at fair value        47,577     82.60-- 136.20      108.20       $69.20
  Exercised                      (974)     4.80-- 117.60       65.80
  Forfeited                   (12,115)    70.00-- 265.00      128.00
                           -----------
Balance at
   December 31, 1997          139,587      1.20-- 265.00      108.00
  Granted at fair value       221,017     25.62--  98.75       29.79       $29.81
  Exercised                      (792)     1.20--  70.00       27.41
  Forfeited                  (139,135)    25.62-- 265.00      110.84
                          -----------
Balance at
   December 31, 1998          220,677     $1.20-- 215.00     $ 28.13
                          ===========
</TABLE>

     At December 31, 1998,  30,386 shares under options were  exercisable  at a
weighted average exercise price of $33.20 per share 65,502 shares under options
were exercisable at a weighted average exercise price of $105.00 per share at
December 31, 1997). A stock option grant of 75,000 shares of common stock
granted on September 18, 1998 at an exercise price of $25.62 per share was
pending stockholder approval.

      The  following  table  summarizes   information  regarding  stock  options
outstanding at December 31, 1998:

<TABLE>
<CAPTION>

                                           Weighted                       Shares under Options
                                            Average                          Exercisable at
                       Option Shares      Contractual     Weighted         December 31, 1998
      Range of         Outstanding at      Remaining      Average     ---------------------------
      Exercise           December 31,        Life         Exercise              Weighted Average
      Prices                1998            (Years)         Price      Number    Exercise Price
  ----------------    ----------------   -------------   ----------   --------   ----------------
<S>    <C>        <C>             <C>          <C>       <C>          <C>
   $1.20 - $ 30.00         209,767          9.36          $ 25.40      26,650       $ 20.74
   40.63 -   72.50           7,275          9.32            52.71       1,177         70.34
   82.50 -  107.50           1,271          8.87           100.26         662        100.62
  127.50 -  162.50           1,862          7.81           140.90       1,416        142.54
  210.00 -  215.00             502          4.00           210.02         502        210.02
                        ----------                       --------
   $1.20 - $215.00         220,677          9.33          $ 28.13      30,407       $ 33.19
                        ==========                       ========
</TABLE>


      For certain  options  issued during the years ended  December 31, 1993 and
1994, we recorded deferred compensation for the difference between the exercise
price and the fair market value of common stock at the date of grant. For
certain additional options issued during the years ended December 31, 1997 and
1998 to non-employees, we recorded deferred compensation expense for the fair
value of the options at the date of grant. Deferred compensation is amortized to
expense on a straight-line basis over the vesting period of the options.

Pro Forma Information

      We have  elected to follow  Accounting  Principles  Board  Opinion No. 25,
Accounting for Stock Issued to Employees ("APB 25"), and related interpretations
in accounting for our employee stock options because, as discussed below, the
alternative fair value accounting provided for under SFAS 123 requires use of
option valuation models that were not developed for use in valuing employee
stock options. Under APB 25, because the exercise price of our employee stock
options equals the market price of the underlying stock on the date of grant, no
compensation expense is recognized.

      Pro  forma  information  regarding  net loss  and net  loss  per  share is
required by SFAS 123, and has been determined as if we had accounted for our
employee stock options granted subsequent to December 31, 1994 under the fair
value method of SFAS 123. The fair value for these options was estimated at the
date of grant using the Black-Scholes option pricing model. The following are
the weighted-average assumptions for 1998, 1997 and 1996, respectively:
risk-free interest rates of 4.57%, 6.27% and 5.73%; no dividends paid;
volatility factors of the expected market price of common stock of .75 and a
weighted-average expected life of the options of 3.84, 5.0 and 3.85 years. The
effects of applying FAS 123 for recognizing compensation expense and providing
pro forma disclosures in 1998, 1997 and 1996 are not likely to be representative
of the effects on reported net income in future years.

      The  Black-Scholes  option  valuation  model  was  developed  for  use  in
estimating the fair value of traded options which have no vesting restrictions


                                      F-17
<PAGE>

and are fully transferable. In addition, option valuation models require the
input of highly subjective assumptions including the expected stock price
volatility. Because our employee stock options have characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially affect the fair value estimate, in
management's opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of our employee stock options.

      For purposes of pro forma  disclosures,  the  estimated  fair value of the
options is amortized to pro-forma net loss over the options' vesting periods.
Our pro forma information follows (in thousands except for net loss per share
information):

 <TABLE>
<CAPTION>
                                             1998         1997         1996
                                          ---------     ---------    ---------
<S>                                        <C>          <C>          <C>
          Net loss applicable to
            Common Stockholders
              Historical                   $(38,524)    $(29,289)    $(18,790)
              Pro forma                    $(40,734)    $(31,101)    $(20,280)
          Net loss per common share
              Historical                   $ (38.31)    $ (34.44)    $ (27.85)
              Pro forma                    $ (40.50)    $ (36.57)    $ (30.05)

</TABLE>


Reserved Shares

      At December 31,  1998,  386,781  shares of common stock were  reserved for
conversion of outstanding preferred stock and for issuance upon exercise of
outstanding options, warrants and options available for future grant. The
reserved shares excluded shares issuable upon conversion of Series C Preferred
Stock and 145,189 shares issuable upon exercise of the Company's stock options
which are exercisable after May 31, 1999.


                                      F-18
<PAGE>



Warrants

      A summary of outstanding warrants to purchase common stock at December 31,
1998 is as follows:

<TABLE>
<CAPTION>
                                                   Number of            Exercise         Term
                   Description                     Warrants               Price         in Year      Expiration
       ------------------------------------      ---------------    ----------------    -------    -------------
<S>                           <C>        <C>               <C>     <C>
       Lease financing arrangements                   4,585         $48.00 - $216.60     5 - 7      2000 - 2002
       Series A Convertible Preferred Stock          27,500             $203.68            6           2002
       Secured term loan                             10,000             $125.00           10           2007
       Senior convertible notes                       6,875             $150.00            3           2001
       Series B Convertible Preferred Stock          17,500         $53.00 - $ 96.40       5           2003
       Series D Convertible Preferred Stock          38,373              $61.40            5           2003
                                                  ---------
                                                    104,833
                                                  =========
</TABLE>


9.  Taxes

      As of December 31, 1998, we had federal net operating  loss  carryforwards
of approximately $141.2 million. The net operating loss and credit carryforwards
will expire at various dates beginning in 2004 through 2013, if not sooner
utilized.

      Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
and the amounts used for income tax purposes.

      Significant  components  of our  deferred tax assets and  liabilities  for
federal and state income taxes as of December 31, 1998 and 1997 are as follows:

<TABLE>
<CAPTION>
                                                      1998             1997
                                                  ------------     ------------
<S>                                               <C>             <C>
   Deferred tax assets:
     Net operating  loss carryforwards            $ 48,600,000    $  35,200,000
     Research credits (expiring  in 2004--2013)      3,900,000        2,800,000
     Capitalized research and development costs      6,400,000        4,700,000
     Other                                          (1,200,000)         400,000
                                                   ------------    ------------
         Total deferred tax assets                  57,700,000       43,100,000
      Valuation allowance for deferred tax assets  (57,700,000)     (43,100,000)
                                                   ------------    ------------
      Net deferred tax asset                      $          -    $           -
                                                  =============   =============

</TABLE>

      The net valuation  allowance  increased by $14.6  million  during the year
ended December 31, 1998.

      Utilization  of the net  operating  losses and credits may be subject to a
substantial annual limitation due to the "change in ownership" provisions of the
Internal Revenue Code of 1986 and similar state provisions. The annual
limitation may result in the expiration of net operating losses and credits
before utilization.

10.    Subsequent Events

     In April 1999,  directors of the Company  holding stock options to purchase
an aggregate of 131,717 shares of common stock agreed to surrender these options
to the Company for cancellation.



                                      F-19
<PAGE>

     On April 5, 1999,  the  Company  entered  into a credit  facility  and note
purchase agreement with certain investors, stockholders, key executives and
members of the board of directors (the "Credit Agreement"), pursuant to which
the Company may borrow approximately $1.0 million at any time commencing on May
14, 1999 and until the earlier of the completion of a registered public offering
of the Company's equity securities, or September 1, 1999 (the "Convertible
Promissory Notes"). The Convertible Promissory Notes will be due and payable on
the earlier of (i) 30 days subsequent to the completion of the public offering,
or (ii) December 31, 1999. Interest on the Convertible Promissory Notes will
accrue at an annual rate of 12%. The Convertible Promissory Notes, when issued,
will be secured by certain assets of the Company and be convertible into shares
of the class and series of equity securities offered by the Company in the
public offering, or into common stock if no such offering occurs prior to
December 31, 1999. In connection with the Credit Agreement, the Company issued
warrants to purchase shares of the same class and series of equity securities as
those into which the debt is convertible. The number of shares subject to these
warrants is equal to 50% of the debt amount divided by the per share sale price
of the shares sold in the public offering. These warrants are exercisable, on a
cashless basis, commencing on April 5, 1999, and through the third anniversary
date of the public offering. The conversion price of the Convertible Promissory
Notes and the exercise price of the warrants is equal to the per share offering
price in the public offering. If a public offering is not completed prior to
December 31, 1999, then the conversion price of the Convertible Promissory Notes
and the exercise price of the warrants will be the lower of $0.05 per share of
common stock, or 1/3 of the five-day weighted average trading price of the
Company's common stock for the period ending three trading days prior to
conversion or exercise.

     In April 1999, the Company also entered into an amendment agreement with
existing lender to permit the issuance by the Company of the Convertible
Promissory Notes. In connection with the amendment, the Company issued a warrant
to purchase shares of the class and series of equity securities offered by the
Company in the first registered public offering by the Company after the date of
the loan amendment, or into common stock if no such offering occurs prior to
December 31, 1999. The number of shares subject to these warrants is equal to
$592,685 divided by the per share sale price of the shares sold in the above
offering. This warrant is exercisable, on a cashless basis, commencing on April
30, 1999 and through the seventh anniversary date of the earlier to occur of (i)
December 31, 1999, or (ii) the date of the above offering. The per share
exercise price will be equal to the per share offering price of the above
offering, or, if no offering is completed by December 31, 1999, then the lower
of $0.05 per share of common stock, or 1/3 of the five-day weighted average
trading price of the common stock for the period ending three trading days prior
to conversion or exercise.
     
     On June __, 1999,  the  shareholders  approved  and the Company  effected a
one-for-twenty  reverse stock split of the Company's  outstanding  common stock.
All common  shares  and per common share  amounts  have been restated to reflect
the reverse stock split in all periods presented.


                                      F-20
<PAGE>

=========================================       ================================

You should rely only on the information                 7,500,000 Shares
contained in this prospectus or to which
we have referred you. We have not                       
authorized anyone to provide you with                   
information that is different. This                      
document may only be used where it is                    
legal to sell these securities. The                          [LOGO]        
information in this prospectus may only                                        
be accurate on the date of this                                                
prospectus.                                                                    
                                                                               
                                                       Series R Convertible 
                                                          Preferred Stock   
         TABLE OF CONTENTS                                                     
                                                                               
                                                                               
                                     Page                                      
Prospectus Summary...............     4                
Risk Factors.....................    10                    
Where You Can Find More                                 
   Information...................    20                    
Use of Proceeds..................    21                   ---------------  
Price Range of Common Stock......    22                                        
Dividend Policy..................    22                      PROSPECTUS        
Capitalization...................    23                                        
Selected Financial Data..........    24                   ---------------      
Management's Discussion and                                                    
   Analysis of Financial Condition                                             
   And Results of Operations.....    25                                        
Business.........................    31                                     
Management.......................    41                                       
Description of Capital Stock.....    57                                      
Shares Eligible for Future Sale..    62                                    
The Rights Offering..............    63                    May ____, 1999  
Legal Matters....................    68                
Experts..........................    68
Index to Financial Statements....   F-1

=========================================       ================================



<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

      The  following  table  sets  forth the  various  expenses  expected  to be
incurred by the Registrant in connection with the sale and distribution of the
securities being registered hereby. All amounts are estimated except the
Securities and Exchange Commission registration fee.

          SEC registration fee.................   $  4,170
          Accounting fees and expenses.........     75,000
          Legal fees and expenses..............    100,000
          Printing and engraving fees..........     25,000
          Miscellaneous fees and expenses......     95,830
                                                  --------
                 Total.........................    300,000

Item 14. Indemnification of Directors and Officers.

      Section 145 of the  Delaware  General  Corporation  Law,  as amended  (the
"DGCL"), provides that a corporation may indemnify any person who was or is a
party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal or investigative
(other than an action by or in the right of the corporation) by reason of the
fact that the person is or was a director, officer, employee or agent of the
corporation, or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise, against expenses (including attorneys'
fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by the person in connection with such action, suit or proceeding, if
the person acted in good faith and in a manner the 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, had no reasonable cause to believe the
person's conduct was unlawful. Section 145 further provides that a corporation
similarly may indemnify any such person serving in any such capacity who was or
is a party or is threatened to be made a party to any threatened, pending or
completed action or suit by or in the right of the corporation to procure a
judgment in its favor, against expenses actually and reasonably incurred in
connection with the defense or settlement of such action or suit if he acted in
good faith and in a manner he reasonably believed to be in or not opposed to the
best interests of the corporation and except that no indemnification shall be
made 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 only to the extent that
the Delaware Court of Chancery or such other court in which such action or suit
was brought shall determine upon application that, despite the adjudication of
liability but in view of all the circumstances of the case, such person is
fairly and reasonably entitled to indemnity for such expenses which the Court of
Chancery or such other court shall deem proper.

      Section  102(b)(7)  of the DGCL  permits a  corporation  to include in its
certificate of incorporation a provision eliminating or limiting the personal
liability of a director to the corporation or its stockholders for monetary
damages for breach of fiduciary duty as a director, provided that such provision
shall not eliminate or limit the liability of a director (i) for any breach of
the director's duty of loyalty to the corporation or its stockholders, (ii) for
acts or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) under Section 174 of the DGCL (relating to
unlawful payment of dividends and unlawful stock purchase and redemption) or
(iv) for any transaction from which the director derived an improper personal
benefit.

      The  Registrant's   Amended  and  Restated  Certificate  of  Incorporation
provides that the Registrant's directors shall not be liable to the Registrant
or its stockholders for monetary damages for breach of fiduciary duty as a
director, except to the extent that exculpation from liabilities is not
permitted under the DGCL as in effect at the time such liability is determined.
The Registrant has entered into indemnification agreements with all of its
officers and directors, as permitted by the DGCL.


Item 15.  Recent Sales of Unregistered Securities.

     Since  May  1996,  we have  sold and  issued  the  following  unregistered
securities (the share numbers and per share prices below reflect the
one-for-twenty reverse stock split of the outstanding common stock to be
effected prior to the completion of this offering):



                                      II-1
<PAGE>

      (1) In April 1999, we issued to MMC/GATX  Partnership  No. 1 in connection
with the amendment of a loan agreement with GATX a cashless exercise warrant to
purchase 296,342 shares of the class and series of equity securities which
are being registered under this registration statement (i.e. the Series R
Convertible Preferred Stock). This Warrant is exercisable upon the effectiveness
of this registration statement and through the seventh anniversary date of the
earlier to occur of (i) December 31, 1999, or (ii) the effective date of this
registration statement, subject to acceleration upon certain events. The per
share exercise price will be $2.00 (the per share price at which the Series R
Convertible Preferred Stock is sold hereunder).

      (2) In April  1999,  we also  issued to various  lenders  who were  either
existing stockholders, key executives or directors cashless exercise
warrants to purchase 249,502 shares of the class and series of equity
securities which are being registered under this registration statement (i.e.
the Series R Convertible Preferred Stock) (the "Debt Offering"). These warrants
are exercisable upon the consummation of the sale of the Series R Convertible
Preferred Stock registered hereunder (the "Consummation Date") and through the
third anniversary date of such consummation, subject to acceleration upon
certain events. The per share exercise price will be $2.00 (the per share price
at which the Series R Convertible Preferred Stock is sold hereunder).

      (3) In connection  with the Debt  Offering,  each lender was also issued a
Senior Subordinated Secured Convertible Promissory Note convertible after the
Consummation Date and prior to the earlier to occur of (i) January 1, 2000 and
(ii) thirty days following the Consummation Date into ____________ shares of the
Series R Convertible Preferred Stock at a conversion price of $2.00 per share.


      (4) In May  1997,  we  obtained  a  $5.0  million  term  loan  to pay  off
preexisting debt, finance capital asset acquisition and finance continued
research and development. The lender was granted warrants to purchase 10,000
shares of common stock at an exercise price of $125.00 per share. These warrants
expire May 7, 2007.

      (5) On December  10,  1998,  Shaman and certain  institutional  investors
exchanged an aggregate of $4.8 million (including accrued interest) of Senior
Convertible Notes for common stock and an aggregate of 38,373 warrants to
purchase additional shares of common stock in exchange for surrendering the
redemption rights previously held by them under the notes. The warrants were
priced at 150% of the average closing price for the month of December 1998. We
have attributed a value of $943,680 to these warrants

      The  sales  of  the  above  securities  were  deemed  to  be  exempt  from
registration under the Securities Act of 1933, as amended, in reliance on
Section 4(2) of the Securities Act. In each such transaction, the recipients of
securities represented their intentions to acquire the securities for investment
only and not with a view to or for sale in connection with any distribution
thereof and appropriate legends were affixed to the securities issued in such
transactions

Item 16. Exhibits and Financial Statement Schedules.

   The  exhibits  listed  in the  Exhibit  Index  are  filed  as  part  of  this
Registration Statement.

(a) Exhibits

 Exhibit
 Number                             Description
- --------     -------------------------------------------------------------------
 3.1*        Amended and Restated  Certificate of  Incorporation,  as filed with
             the Delaware Secretary of State on March 11, 1999.
 3.2(9)      Amended and Restated Bylaws, as amended March 29, 1996.
 4.1**       Form of  Certificate of Designation of Preferences of Series R
             Preferred Stock of the Registrant
 5.1**       Opinion of Brobeck, Phleger & Harrison LLP.
10.1(1)(19)  401(k) Plan.
10.2(1)(19)  Form of Stock Purchase Agreement.
10.3(1)      Form of Indemnification Agreement.
10.4(1)      Form of Agreement with Scientific Strategy Team Members.
10.5(1)      Form of Proprietary Information and Inventions Agreement-Employees.
10.6(1)      Form of Proprietary Information and Inventions
             Agreement-Consultants.
10.7(1)(18)  License  Agreement dated February 8, 1990,  between Shaman and
             Dr. Michael Tempesta.


                                      II-2
<PAGE>

10.8(1)(18)  Stock Purchase Agreement dated June 15, 1990, between Shaman
             and Lisa A. Conte.
10.9(1)      Master  Equipment Lease Agreement dated December 26, 1990,  between
             Shaman and Lease Management  Services,  Inc. 
10.10(1)(18) Supply Agreement dated June 1, 1992.
10.11(1)     Registration  Rights  Agreement  dated October 22, 1992, as amended
             December 14, 1992,  between Shaman and certain holders of preferred
             stock of Shaman.
10.12(1)     Industrial Lease Agreement dated January 1, 1993, between
             Shaman and Grand/ Roebling Investment Company.
10.13(4)     Loan and Security  Agreement  dated  September  27,  1993,  between
             Shaman and Household Commercial of California.
10.14(4)     Common Stock Warrant dated September 30, 1993, issued to MMC/GATX
             Partnership No. I.
10.15(4)     Common Stock Warrant dated October 5, 1993, issued to Meier
             Mitchell & Co.
10.16(6)(18) Joint Research and Product Development Agreement, dated May 24, 
             1995, by and between Ono Pharmaceutical Co., Ltd. and Registrant.
10.17(a)(10) Amendment Agreement, dated December 4, 1996, to the Joint Research 
             and Product Development Agreement by and between Ono Pharmaceutical
             Co., Ltd. and Registrant.
10.18(6)(18) License Agreement, dated June 8, 1995, by and between Bayer AG and 
             Registrant.
10.19(7)(18) Development  Agreement,  dated  January  11,  1996,  by and between
             Abbott Laboratories and Registrant.
10.20(9)(18) Subscription  Agreement  dated  July 25,  1996 by and  between  the
             Registrant and Fletcher International Limited.
10.21(10)(18)Joint  Research  and  Product  Development  and   Commercialization
             Agreement dated September 23, 1996, by and between Lipha, Lyonnaise
             Industrielle Pharmaceutique S.A. and the Registrant.
10.22(10)(18)Stock Purchase Agreement dated September 23, 1996, by and between 
             Lipha, Lyonnaise Industrielle Pharmaceutique S.A. and the 
             Registrant.
             Shaman Pharmaceuticals, Inc. 1992 Stock Option Plan (as
10.23(11)(19)Amended and Restated on February 14, 1997).
10.24(3)(19) Form of Notice of Grant with Stock Option Agreement.
10.25(3)(19) Form of Addendum to Stock Option Agreement (Special Tax Elections).
10.26(3)(19) Form of Addendum to Stock Option Agreement (Limited Stock
             Appreciation Rights).
10.27(11)(19)Form of Non-Employee Director Automatic Stock Option Agreement.
10.28(12)    Masopracol License Agreement, dated as of March 19, 1997, by and
             between Access Pharmaceuticals, Inc. and the Registrant.
10.29(12)(18)Amended and Restated Masopracol License Agreement, dated as of
             April 1997, by and between Access Pharmaceuticals, Inc. and the 
             Registrant.
10.30(12)    Loan  and  Security  Agreement,  dated as of May 7,  1997,  between
             MMC/GATX Partnership I and Registrant.
10.30A(12)   Amendment No. 1 to Loan and Security Agreement, dated as of
             June 30, 1997, by and between Registrant and MMC/GATX Partnership
             No. I.
10.30B(15)   Waiver letter dated July 16, 1998, executed by Shaman 
             Pharmaceuticals, Inc. and approved by MMC/GATX Partnership No. I
             as to the payment of dividends on the Series C Preferred Stock.
10.31(12)    Secured Promissory Note, dated May 16, 1997, issued in favor
             of MMC/GATX Partnership No. I.
10.32(12)    Warrant, granted May 7, 1997, in favor of MMC/GATX Partnership 
             No. I.
10.33(12)    Amendment to Warrants, dated May 7, 1997, MMC/GATX Partnership
             No. I and Registrant.
10.34(12)    Engagement   Agreement,   dated  April  7,  1997,  by  and  between
             Registrant and Diaz & Altschul Capital, LLC.
10.35(12)    Amended Engagement  Agreement,  dated June 30, 1997, by and between
             Registrant and Diaz & Altschul Capital, LLC.
10.36(12)    Form of Note Purchase Agreement,  dated as of June 30, 1997, by and
             between Registrant and certain investors.
10.37(13)    Master Lease Agreement, dated September 15, 1997, between
             Registrant and Transamerica Business Credit Corporation, with
             related schedules.
10.38(13)    Amendment to Note Purchase Agreement, dated as of June 30, 1997, by
             and between Registrant and Certain investors.
10.39(14)    Amendment Agreement, dated as of March 18, 1998, by and between the
             Registrant and certain investors.
10.40(14)    Form of Common Stock Purchase Warrant,  dated as of March 18, 1998,
             issued to certain investors.


                                      II-3
<PAGE>

10.41(14)    Second  Amendment  Agreement,  dated  as of June 10,  1998,  by and
             between the Registrant and certain investors.
10.42(17)    Exchange  Agreement,  dated as of December 10, 1998, by and between
             Registrant and certain entities.
10.43(19)    Common Stock Purchase Agreement dated as of November 18, 1998.
10.44(19)(20)Employment Agreement dated as of April 1, 1998, by and
             between Registrant and John W.S. Chow.
10.45(19)(20)Promissory Note dated as of  June 17, 1998, by and between
             Registrant and John W.S. Chow.
10.46(20)    Development and Commercial Supply  Agreement,  dated as of December
             1, 1998, by and between Registrant and NYComed Inc.
23.1*        Consent of Ernst & Young LLP, Independent Auditors.
23.2**       Consent of Brobeck, Phleger & Harrison LLP (included in the
             opinion filed as Exhibit 5.1).
24.1*        Power of Attorney (included under the caption "Signatures").
27*          Financial Data schedule
- ----------

* Filed herewith.
** To be filed by amendment.



 (1) Incorporated  by  reference  to  exhibits   filed  with  the   Registrant's
     Registration Statement on Form S-1,  File No.  33-55892  which was declared
     effective January 26, 1993.
 (2) Intentionally omitted.
 (3) Incorporated by reference to exhibits filed on July 23, 1993 with
     Registrant's Registration Statement on Form S-8, File No. 33-66450.
 (4) Incorporated  by  reference to  exhibits  filed on  November  10, 1993 with
     Registrant's Registration Statement on Form S-1, File No. 33-71506.
 (5) Intentionally omitted.
 (6) Incorporated  by reference to exhibits  filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended June 30, 1995, as amended.
 (7) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year ended December 31, 1995.
 (8) Intentionally omitted.
 (9) Incorporated  by reference  to exhibits filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended June 30, 1996, as amended.
(10) Incorporated by reference  to exhibits  filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended September 30, 1996, as amended.
(11) Incorporated by reference to exhibits filed on June 30, 1997 with
     Registrant's Registration Statement on Form S-8, File No. 333-30365.
(12) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-3, File No. 333-31843.
(13) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year ended December 31, 1997.
(14) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-3, File No. 333-49025.
(15) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-2, File No. 333-59053.
(16) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form  S-3, File No. 333-67023.
(17) Incorporated by  reference  to  exhibits  filed on  December  11, 1998 with
     Registrant's Current Report on Form 8-K.
(18) Confidential treatment has been granted with respect to certain portions of
     these agreements.
(19) Management contract or compensation plan.
(20) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year  ended  December  31, 1998.

(b) Financial Statement Schedules

   None.



                                      II-4
<PAGE>

Item 17. Undertakings.

   The undersigned Registrant hereby undertakes:

      (A) To file,  during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:

      (1) to include  any  prospectus  required  by Section  10(a)(3) of the 
Securities Act;

      (2) 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.
Notwithstanding the foregoing, any increase or decrease in the volume of
securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high end of
the estimates maximum offering range may be reflected in the form of prospectus
filed with the commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than 20 percent change in the
maximum aggregate offering price set forth in the "Calculation Of Registration
Fee" table in the effective registration statement; and

      (3) 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; provided,
however, that paragraphs (1) and (2) do not apply if the information required to
be included in a post-effective amendment by these paragraphs is contained in
periodic reports filed with or furnished to the Commission by the Registrant
pursuant to Section 13 or Section 15(d) of the Exchange Act that are
incorporated by reference in the Registration Statement.

     (B) 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.

     (C) To remove from registration by means of a post-effective  amendment any
of the securities  being  registered that remain unsold at the termination of
 the offering.

     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.

     The  undersigned   Registrant  hereby  undertakes  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
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) 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.

   The undersigned Registrant hereby undertakes that:

     (1) For purposes of determining any liability under the Securities Act, the
   information  omitted  from  the  form  of  prospectus  filed  as part of this
   Registration  Statement in reliance upon Rule 430A and contained in a form of


                                      II-5
<PAGE>

   prospectus  filed by the  Registrant  pursuant  to Rule  424(b)(1)  or (4) or
   497(h)  under  the  Securities  Act  shall  be  deemed  to be  part  of  this
   Registration Statement as of the time it was declared effective.

     (2) For purposes of determining  any liability  under the  Securities  Act,
   each  post-effective  amendment  that contains a form of prospectus  shall be
   deemed to be a new registration  statement relating to the securities offered
   therein,  and the offering of such securities at that time shall be deemed to
   be the initial bona fide offering thereof.




                                      II-6
<PAGE>

                             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 South San Francisco,
State of California, on the 7 day of May, 1999.

                                       SHAMAN PHARMACEUTICALS, INC.


                                       By:/s/ Lisa A. Conte
                                          ------------------
                                          Lisa A. Conte

                       

                                POWER OF ATTORNEY

    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below hereby constitutes and appoints Lisa A. Conte as his true and lawful
attorney-in-fact and agent, with full power of substitution and resubstitution,
for him and in his name, place and stead, in any and all capacities, to sign any
and all amendments to this Registration Statement (including post-effective
amendments or any abbreviated registration statement and any amendments thereto
filed pursuant to Rule 462(b) increasing the amount of securities for which
registration is sought), 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 requisite and necessary
to be done in connection therewith, as fully for 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 her substitute or 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 and on the
dates indicated:


          Name                             Title                      Date
- --------------------------    -------------------------------     -------------
/s/ Lisa A. Conte
- --------------------------    Director, President, Chief          May 7, 1999
    Lisa A. Conte             Executive Officer and Chief            
                              Financial Officer, (Principal
                              Executive Officer and Principal
                              Financial and Accounting Officer)
                                 
/s/ G. Kirk Raab
- --------------------------    Chairman of the Board               May 7, 1999
    G. Kirk Raab                             
                                                                     
        
/s/ Adrian D.P. Bellamy
- --------------------------    Director                            May 7, 1999 
    Adrian D.P. Bellamy

/s/ Jeffrey Berg                                 
- --------------------------    Director                            May 7, 1999 
    Jeffrey Berg

/s/ Herbert H. McDade, Jr.                                 
- --------------------------    Director                            May 7, 1999 
    Herbert H. McDade, Jr.

/s/ M. David Titus                                 
- --------------------------    Director                            May 7, 1999 
    M. David Titus

                                
 --------------------------   Director                            May _, 1999 
    Loren D. Israelsen


                                      II-7
<PAGE>


                                  EXHIBIT INDEX



Exhibit
 Number                             Description
- --------     -------------------------------------------------------------------
 3.1*        Amended and Restated  Certificate of  Incorporation,  as filed with
             the Delaware Secretary of State on March 11, 1999.
 3.2(9)      Amended and Restated Bylaws, as amended March 29, 1996.
 4.1**       Form of  Certificate of Designation of Preferences of Series R
             Preferred Stock of the Registrant
 5.1**       Opinion of Brobeck, Phleger & Harrison LLP.
10.1(1)(19)  401(k) Plan.
10.2(1)(19)  Form of Stock Purchase Agreement.
10.3(1)      Form of Indemnification Agreement.
10.4(1)      Form of Agreement with Scientific Strategy Team Members.
10.5(1)      Form of Proprietary Information and Inventions Agreement-Employees.
10.6(1)      Form of Proprietary Information and Inventions
             Agreement-Consultants.
10.7(1)(18)  License  Agreement dated February 8, 1990,  between Shaman and
             Dr. Michael Tempesta.
10.8(1)(18)  Stock Purchase Agreement dated June 15, 1990, between Shaman
             and Lisa A. Conte.
10.9(1)      Master  Equipment Lease Agreement dated December 26, 1990,  between
             Shaman and Lease Management  Services,  Inc. 
10.10(1)(18) Supply Agreement dated June 1, 1992.
10.11(1)     Registration  Rights  Agreement  dated October 22, 1992, as amended
             December 14, 1992,  between Shaman and certain holders of preferred
             stock of Shaman.
10.12(1)     Industrial Lease Agreement dated January 1, 1993, between
             Shaman and Grand/ Roebling Investment Company.
10.13(4)     Loan and Security  Agreement  dated  September  27,  1993,  between
             Shaman and Household Commercial of California.
10.14(4)     Common Stock Warrant dated September 30, 1993, issued to MMC/GATX
             Partnership No. I.
10.15(4)     Common Stock Warrant dated October 5, 1993, issued to Meier
             Mitchell & Co.
10.16(6)(18) Joint Research and Product Development Agreement, dated May 24, 
             1995, by and between Ono Pharmaceutical Co., Ltd. and Registrant.
10.17(a)(10) Amendment Agreement, dated December 4, 1996, to the Joint Research 
             and Product Development Agreement by and between Ono Pharmaceutical
             Co., Ltd. and Registrant.
10.18(6)(18) License Agreement, dated June 8, 1995, by and between Bayer AG and 
             Registrant.
10.19(7)(18) Development  Agreement,  dated  January  11,  1996,  by and between
             Abbott Laboratories and Registrant.
10.20(9)(18) Subscription  Agreement  dated  July 25,  1996 by and  between  the
             Registrant and Fletcher International Limited.
10.21(10)(18)Joint  Research  and  Product  Development  and   Commercialization
             Agreement dated September 23, 1996, by and between Lipha, Lyonnaise
             Industrielle Pharmaceutique S.A. and the Registrant.
10.22(10)(18)Stock Purchase Agreement dated September 23, 1996, by and between 
             Lipha, Lyonnaise Industrielle Pharmaceutique S.A. and the 
             Registrant.
             Shaman Pharmaceuticals, Inc. 1992 Stock Option Plan (as
10.23(11)(19)Amended and Restated on February 14, 1997).
10.24(3)(19) Form of Notice of Grant with Stock Option Agreement.
10.25(3)(19) Form of Addendum to Stock Option Agreement (Special Tax Elections).
10.26(3)(19) Form of Addendum to Stock Option Agreement (Limited Stock
             Appreciation Rights).
10.27(11)(19)Form of Non-Employee Director Automatic Stock Option Agreement.
10.28(12)    Masopracol License Agreement, dated as of March 19, 1997, by and
             between Access Pharmaceuticals, Inc. and the Registrant.
10.29(12)(18)Amended and Restated Masopracol License Agreement, dated as of
             April 1997, by and between Access Pharmaceuticals, Inc. and the 
             Registrant.
10.30(12)    Loan  and  Security  Agreement,  dated as of May 7,  1997,  between
             MMC/GATX Partnership I and Registrant.


                                      II-8
<PAGE>

10.30A(12)   Amendment No. 1 to Loan and Security Agreement, dated as of
             June 30, 1997, by and between Registrant and MMC/GATX Partnership
             No. I.
10.30B(15)   Waiver letter dated July 16, 1998, executed by Shaman 
             Pharmaceuticals, Inc. and approved by MMC/GATX Partnership No. I
             as to the payment of dividends on the Series C Preferred Stock.
10.31(12)    Secured Promissory Note, dated May 16, 1997, issued in favor
             of MMC/GATX Partnership No. I.
10.32(12)    Warrant, granted May 7, 1997, in favor of MMC/GATX Partnership 
             No. I.
10.33(12)    Amendment to Warrants, dated May 7, 1997, MMC/GATX Partnership
             No. I and Registrant.
10.34(12)    Engagement   Agreement,   dated  April  7,  1997,  by  and  between
             Registrant and Diaz & Altschul Capital, LLC.
10.35(12)    Amended Engagement  Agreement,  dated June 30, 1997, by and between
             Registrant and Diaz & Altschul Capital, LLC.
10.36(12)    Form of Note Purchase Agreement,  dated as of June 30, 1997, by and
             between Registrant and certain investors.
10.37(13)    Master Lease Agreement, dated September 15, 1997, between
             Registrant and Transamerica Business Credit Corporation, with
             related schedules.
10.38(13)    Amendment to Note Purchase Agreement, dated as of June 30, 1997, by
             and between Registrant and Certain investors.
10.39(14)    Amendment Agreement, dated as of March 18, 1998, by and between the
             Registrant and certain investors.
10.40(14)    Form of Common Stock Purchase Warrant,  dated as of March 18, 1998,
             issued to certain investors.
10.41(14)    Second  Amendment  Agreement,  dated  as of June 10,  1998,  by and
             between the Registrant and certain investors.
10.42(17)    Exchange  Agreement,  dated as of December 10, 1998, by and between
             Registrant and certain entities.
10.43(19)    Common Stock Purchase Agreement dated as of November 18, 1998.
10.44(19)(20)Employment Agreement dated as of April 1, 1998, by and
             between Registrant and John W.S. Chow.
10.45(19)(20)Promissory Note dated as of  June 17, 1998, by and between
             Registrant and John W.S. Chow.
10.46(20)    Development and Commercial Supply  Agreement,  dated as of December
             1, 1998, by and between Registrant and NYComed Inc.
23.1*        Consent of Ernst & Young LLP, Independent Auditors.
23.2**       Consent of Brobeck, Phleger & Harrison LLP (included in the
             opinion filed as Exhibit 5.1).
24.1*        Power of Attorney (included under the caption "Signatures").
27*          Financial Data schedule
- ----------


* Filed herewith.
**To be filed by amendment.

  (1) Incorporated  by  reference  to  exhibits   filed  with  the  Registrant's
     Registration Statement on Form S-1,  File No.  33-55892  which was declared
     effective January 26, 1993.
 (2) Intentionally omitted.
 (3) Incorporated by reference to exhibits filed on July 23, 1993 with
     Registrant's Registration Statement on Form S-8, File No. 33-66450.
 (4) Incorporated  by  reference to  exhibits  filed on  November  10, 1993 with
     Registrant's Registration Statement on Form S-1, File No. 33-71506.
 (5) Intentionally omitted.
 (6) Incorporated  by reference to exhibits  filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended June 30, 1995, as amended.
 (7) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year ended December 31, 1995.
 (8) Intentionally omitted.
 (9) Incorporated  by reference  to exhibits filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended June 30, 1996, as amended.
(10) Incorporated by reference  to exhibits  filed with  Registrant's  Quarterly
     Report on Form 10-Q for the quarter ended September 30, 1996, as amended.


                                      II-9
<PAGE>

(11) Incorporated by reference to exhibits filed on June 30, 1997 with
     Registrant's Registration Statement on Form S-8, File No. 333-30365.
(12) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-3, File No. 333-31843.
(13) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year ended December 31, 1997.
(14) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-3, File No. 333-49025.
(15) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form S-2, File No. 333-59053.
(16) Incorporated by reference to exhibits filed with Registrant's Registration
     Statement on Form  S-3, File No. 333-67023.
(17) Incorporated by  reference  to  exhibits  filed on  December  11, 1998 with
     Registrant's Current Report on Form 8-K.
(18) Confidential treatment has been granted with respect to certain portions of
     these agreements.
(19) Management contract or compensation plan.
(20) Incorporated by reference to exhibits filed with Registrant's Annual Report
     on Form 10-K for the year  ended  December  31, 1998.



                                      II-10
<PAGE>


                                                      Exhibit 3.1



                              AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                         OF SHAMAN PHARMACEUTICALS, INC.
                             a Delaware Corporation



           SHAMAN  PHARMACEUTICALS,  INC., a corporation  organized and existing
under the laws of the State of Delaware, hereby certifies as follows:

           1. The name of this corporation is Shaman  Pharmaceuticals,  Inc. The
original  Certificate of  Incorporation  of the  corporation  was filed with the
Secretary of State of the State of Delaware on December 21, 1992.

           2. The Amended and Restated  Certificate  of  Incorporation  has been
duly adopted by its Board of Directors and  stockholders  in accordance with the
provisions of Sections 242 and 245 of the General  Corporation  Law of the State
of Delaware.

           3. The text of the Restated  Certificate of  Incorporation is  hereby
restated toread in its entirety as follows:


                                    ARTICLE I

           The name of this corporation is Shaman Pharmaceuticals, Inc.


                                   ARTICLE II

           The address of the registered  office of the corporation in the State
of Delaware  is 1209 Orange  Street,  in the City of  Wilmington,  County of New
Castle.  The name of its  registered  agent at such  address is The  Corporation
Trust Company.


                                   ARTICLE III

           The nature of the business or purposes to be conducted or promoted is
to engage in any lawful act or activity for which  corporations may be organized
under General Corporation Law of Delaware.

                                   ARTICLE IV

     A. Classes of Stock.  The Corporation is authorized to issue two classes of
shares to be  designated,  respectively,  Common Stock  ("Common") and Preferred
Stock  ("Preferred").  The total number of shares of Preferred  the  corporation
shall  have  authority  to issue is  2,000,000  with a par value of $0.001  per
share,



                                       
<PAGE>

and the total number of shares of Common the corporation shall have authority to
issue is 40,000,000 with a par value of $0.001 per share.

      B. Rights,  Preferences  and  Restrictions  of  Preferred.  The  Preferred
authorized  by this Amended and Restated  Certificate  of  Incorporation  may be
issued from time to time in series.  The Board of Directors is hereby authorized
to fix or alter the rights, preferences,  privileges and restrictions granted to
or imposed upon any  authorized  series of  Preferred,  and the number of shares
constituting  any such series and the  designation  thereof,  or of any of them.
Subject to  compliance  with  applicable  protective  voting rights which may be
granted to the holders of the  Preferred or series  thereof in  Certificates  of
Designation or in the corporation's Certificate of Incorporation, as amended and
restated from time to time, and  requirements and restrictions of applicable law
("Protective Provisions"), the rights, privileges,  preferences and restrictions
of  any  such  additional  series  may  be  subordinated  to,  pari  passu  with
(including,  without  limitation,   inclusion  in  provisions  with  respect  to
liquidation and acquisition  preferences,  redemption and/or approval of matters
by vote or written consent),  or senior to any of those of any present or future
class or series of Preferred or Common.  Subject to compliance  with  applicable
Protective Provisions,  the Board of Directors is also authorized to increase or
decrease the number of shares of any series, prior or subsequent to the issue of
that series, but not below the number of shares of such series then outstanding.
In case the number of shares of any  series  shall be so  decreased,  the shares
constituting  such decrease  shall resume the status which they had prior to the
adoption  of the  resolution  originally  fixing  the  number  of shares of such
series.

           The  number of shares  constituting  the  Series A  Preferred  Stock,
$0.001 par value per share, shall be Four Hundred Thousand (400,000) shares. The
number of shares  constituting  Series C  Preferred  Stock  shall be Two Hundred
Thousand  (200,000)  shares,  $0.001 par value per  share.  The number of shares
constituting  the Series D Convertible  Preferred Stock (the "Series D Preferred
Stock") shall be Six Thousand Two Hundred Eighty-five (6,285) shares, $0.001 par
value per share and shall not be subject to increase.  The Corporation shall not
issue any shares of Series D Preferred  Stock after the Issuance  Date  (defined
below), except that on or prior to May 31, 1999, the corporation may issue up to
1,500  shares  of  Series  D  Preferred   Stock  to  MMC/GATX  in  exchange  for
indebtedness  of the corporation to MMC/GATX on a basis of one share of Series D
Preferred Stock for each $1,000 of such indebtedness.  The Board of Directors is
also  authorized to decrease  number of shares of any series of preferred  stock
prior or subsequent  to the issue of the Series A Preferred  Stock but not below
the  number of shares of such  series  then  outstanding.  In case the number of
shares  of any  series  shall be so  decreased,  the  shares  constituting  such
decrease  shall  resume the status  which they had prior to the  adoption of the
resolution originally fixing the number of shares of such series.



                                       2
<PAGE>

           The rights, preferences,  privileges, and restrictions granted to and
imposed on the Series A Preferred  Stock,  the Series C Preferred Stock, and the
Series D Preferred Stock are as set forth below in this Article IV(B).

           1.   Certain  Defined Terms.  The  following terms shall have  the  
following meanings as used in this  Article  IV(B)  (such meanings to be equally
applicable  to both the singular and plural forms of the terms defined):

           "Adjustment  Notice" means an Adjustment Notice  substantially in the
form set forth in Section 14(f).

           "Affiliate"  means, with respect to any Person, any other Person that
directly,  or  indirectly  through  one or  more  intermediaries,  controls,  is
controlled by, or is under common control with, the subject Person. For purposes
of the term "Affiliate," the term "control"  (including the terms "controlling,"
"controlled by" and "under common control with") means the possession, direct or
indirect, of the power to direct or to cause the direction of the management and
policies of a Person,  whether through the ownership of securities,  by contract
or otherwise.

           "Aggregated  Person"  means,  with respect to any holder of shares of
Series D Preferred  Stock,  any Person whose  beneficial  ownership of shares of
Common Stock would be  aggregated  with such  holder's  beneficial  ownership of
shares  of  Common  Stock  for  purposes  of  Section  13(d) of the 1934 Act and
Regulation 13D-G thereunder.

           "AMEX" means the American Stock Exchange, Inc.

           "Arrearage  Interest"  means interest at the rate of 12% per annum on
any dividend on shares of Series D Preferred Stock which dividend is not paid on
a Dividend  Payment Date,  whether or not declared,  from such Dividend  Payment
Date.

           "Auditors"  means Ernst & Young LLP or such other firm of independent
public accountants of recognized national standing as shall have been engaged by
the corporation to audit its financial statements.

           "Auditors'  Determination"  means a  determination  requested  by the
corporation  and  signed  by the  Auditors  concurring  with  the  corporation's
conclusion  that a requirement of the  corporation to redeem,  or a right of any
holder of shares of Series D Preferred Stock to require redemption of, shares of
Series D Preferred  Stock by reason of the  occurrence  of a specified  Optional
Redemption Event which occurs by reason of an event described in clause (1), (2)
or (3) of the  definition  of  Optional  Redemption  Event  would  result in the
corporation  being  required  to  classify  the  Series  D  Preferred  Stock  as
redeemable  preferred  stock on a balance sheet of the Corporation in accordance
with Generally Accepted Accounting Principles. The Auditors' Determination shall
(i) set forth in reasonable detail all relevant facts considered by the Auditors
in connection therewith, (ii) set forth all applicable accounting principles and
assumptions  used, and (iii) set forth in reasonable  detail or attach copies of
all legal,  expert  and other  advice or  information  used by the  Auditors  in
reaching their  conclusion.  To the extent any facts are assumed for purposes of
either the Corporation's conclusion or the Auditor's Determination, the validity



                                       3
<PAGE>

of such conclusion or  determination  shall depend upon such assumed facts being
true and complete in all material respects.

           "Blackout Period" means the period of up to 20 consecutive days after
the date the  Corporation  notifies  the holders of shares of Series D Preferred
Stock  that  they are  required  to  suspend  offers  and  sales of  Registrable
Securities  as a  result  of an  event  or  circumstance  described  in  Section
3.b.(5)(A)  of the Exchange  Agreement,  which period  commences  after the date
which is 90 days after the date of the  Closing  and  during  which  period,  by
reason of Section 3.b.(5)(B) of the Exchange  Agreement,  the Corporation is not
required to amend any  Registration  Statement or to supplement  the  Prospectus
relating to any Registration Statement;  provided, however, that such period may
be up to 30 consecutive  days if the  Corporation  so elects in accordance  with
Section  3.b.(5)(B)  of the  Exchange  Agreement,  subject  to  the  limitations
provided therein.

           "Board of Directors" or "Board" means the Board of Directors  of  the
Corporation.

           "Business Combination  Redemption Percentage" means 118% with respect
to a redemption of shares of Series D Preferred Stock in accordance with Section
8(c)(ii)(f).

           "Business Combination Redemption Price" means an amount in cash equal
to the product  obtained by  multiplying  (A) the sum of (i) $1,000 plus (ii) an
amount  equal to the  accrued  but  unpaid  dividends  on the  share of Series D
Preferred Stock to be redeemed and any Arrearage  Interest on dividends  thereon
in arrears to the date of payment of the  redemption  price  pursuant to Section
8(c)(ii)(f) times (B) the Business Combination Redemption Percentage.

           "Business Day" means (a) in the case of the Series C Preferred Stock,
any day other than a Saturday,  Sunday or other day on which commercial banks in
The City of San Francisco are authorized or required by law to remain closed and
(b) in the case of the Series D Preferred  Stock, any day other than a Saturday,
Sunday  or  other  day on  which  commercial  banks  in The City of New York are
authorized or required by law to remain closed.

           "Cash and Cash  Equivalent  Balances" of any Person on any date shall
be determined  from such Person's books  maintained in accordance with Generally
Accepted Accounting Principles,  and means, without duplication,  the sum of (1)
the cash accrued by such Person and its subsidiaries on a consolidated  basis on
such date and available for use by such Person and its subsidiaries on such date
and (2) all assets which would,  on a consolidated  balance sheet of such Person
and its  subsidiaries  prepared  as of such date in  accordance  with  Generally
Accepted Accounting Principles, be classified as cash or cash equivalents.

           "Common Stock" means the Common Stock, $0.001 par value per share, of
the  Corporation  or any shares of capital  stock into which such stock shall be
changed or reclassified after the Issuance Date.

           "Control Notice" means a Control Notice substantially in the form set
forth in Section 14(e).



                                       4
<PAGE>

           "Converted  Restriction  Amount" means on any date of determination a
number of shares of Common  Stock  equal to 4.9% of the  shares of Common  Stock
outstanding on such date.

           "Corporation  Notice" means a Corporation Notice substantially in the
form set forth in Section 14(c).

           "Dividend  Payment  Date" means each  February 1, May 1, August 1 and
November 1.

           "Exchange  Agreement"  means  the  Exchange  Agreement,  dated  as of
December  10,  1998,  by and between the  Corporation  and the several  original
holders of the Senior  Subordinated  Convertible  Notes  pursuant  to which such
Senior  Subordinated  Convertible Notes will be exchanged for shares of Series D
Preferred Stock.

           "Generally Accepted  Accounting  Principles" for any Person means the
generally  accepted  accounting  principles and practices applied by such Person
from time to time in the preparation of its audited financial statements.

           "Holder Notice" means a Holder Notice  substantially  in the form set
forth in Section 14(d).

           "Indebtedness"   as  used  in  reference  to  any  Person  means  all
indebtedness of such Person for borrowed money,  the deferred  purchase price of
property,  goods and services and obligations under leases which are required to
be capitalized in accordance with Generally Accepted  Accounting  Principles and
shall include all such  indebtedness  guaranteed in any manner by such Person or
in effect  guaranteed by such Person through a contingent  agreement to purchase
and all  indebtedness  for the  payment or  purchase  of which  such  Person has
contingently  agreed to advance or supply funds and all indebtedness  secured by
mortgage or other lien upon property owned by such Person,  although such Person
has not assumed or become liable for the payment of such indebtedness,  and, for
all purposes hereof,  such  indebtedness  shall be treated as though it has been
assumed by such Person.

           "Issuance  Date"  means (a) with  respect to the  Series C  Preferred
Stock,  the first date of original  issuance of any shares of Series C Preferred
Stock and (b) with respect to the Series D Preferred Stock, the date of original
issuance of the shares of Series D  Preferred  Stock  pursuant  to the  Exchange
Agreement.

           "Initial  Reserve  Amount"  means  6,285,000  shares of Common  Stock
reserved by the Corporation for issuance upon conversion of the shares of Series
D Preferred Stock.

           "Junior Dividend Stock" means,  collectively,  the Series A Preferred
Stock,  the Common  Stock and any other class or series of capital  stock of the
Corporation ranking junior as to dividends to the Series D Preferred Stock.

           "Junior  Liquidation  Stock"  means,   collectively,   the  Series  A
Preferred Stock, the Common Stock and any other class or series of capital stock
of the  Corporation  ranking  junior as to  liquidation  rights to the  Series D
Preferred Stock.



                                       5
<PAGE>

           "Majority  Holders" means at any time the holders of shares of Series
D Preferred Stock which shares  constitute a majority of the outstanding  shares
of Series D Preferred Stock outstanding at such time.

           "Market  Price" of any  security  on any date means the  closing  bid
price of such  security  on such  date on the  Nasdaq or such  other  securities
exchange or other  market on which such  security  is listed for  trading  which
constitutes the principal  securities  market for such security,  as reported by
Bloomberg, L.P.

           "Measurement  Period"  means with  respect to any Series D Conversion
Date,  the  period  consisting  of 12  consecutive  Trading  Days  ending on and
including the Trading Day immediately preceding such Series D Conversion Date.

           "Nasdaq" means The Nasdaq  National Market or The Nasdaq
SmallCap Market, whichever system lists the Common Stock.

           "1934 Act" means the  Securities  Exchange  Act of 1934,
as amended.

           "1933 Act" means the Securities Act of 1933, as amended.

           "NYSE" means the New York Stock Exchange, Inc.

           "Optional  Redemption  Date"  means the date which is three  Business
Days after a holder of shares of Series D  Preferred  Stock who is  entitled  to
redemption  rights under  Section  7(c)(ii)(a)  and  7(c)(ii)(b)  gives a Holder
Notice.

           "Optional Redemption Event" means  any  one  of  thefollowing events:

           1)   For any period of five consecutive Trading  Days following  the 
Issuance  Date there shall  be no reported sale price of the Common Stock on any
of the Nasdaq, the NYSE or the AMEX;

           2)   The Common Stock ceases to be listed for  trading on the Nasdaq,
the NYSE or the AMEX;

           3) Any  consolidation  or merger of the Corporation or any subsidiary
of the  Corporation  with or into another entity or other  business  combination
transaction  involving the  Corporation  or any  subsidiary  of the  Corporation
(other than a merger or  consolidation  of a subsidiary of the Corporation  into
the  Corporation  or a  wholly-owned  subsidiary of the  Corporation)  where the
stockholders of the  Corporation  immediately  prior to such  transaction do not
collectively  own at  least  51% of the  outstanding  voting  securities  of the
surviving corporation of such transaction immediately following such transaction
or the common stock of such  surviving  corporation is not listed for trading on
the Nasdaq, the NYSE or the AMEX; or the sale of all or substantially all of the
assets of the Corporation and its subsidiaries;

           4) The adoption of any amendment to the Certificate of  Incorporation
of the Corporation (other than any certificate designating a series of preferred
stock of the Corporation  which does not contravene the rights of the holders of
shares of Series D Preferred Stock) which  materially and adversely  affects the



                                       6
<PAGE>

rights of the holders of shares of Series D Preferred  Stock in respect of their
interest in the Common  Stock in a  different  and more  adverse  manner than it
affects  the rights of holders of Common  Stock  generally  or the taking of any
other action which materially and adversely affects the rights of the holders of
Series D Preferred Stock;

           5) The inability of any holder of shares of Series D Preferred  Stock
for (x) (i) 20 days (whether or not  consecutive)  or (ii) if in accordance with
Section  3.b.(5)(B) of the Exchange  Agreement the Corporation elects a Blackout
Period of up to 30 consecutive  days which commences more than 90 days after the
Issuance Date, such greater number of days as shall equal the number of days the
Blackout  Period so elected is in effect (but in no event more than 30 days), in
either  the case of such  clause  (i) or such  clause  (ii)  during  the  period
commencing  on the  Issuance  Date and  ending on the first  anniversary  of the
Issuance Date or (y) 60 days (whether or not  consecutive)  subsequent to August
29, 1997, to sell shares of Common Stock issued or issuable  upon  conversion of
shares of Series D Preferred Stock pursuant to any Registration Statement (1) by
reason of the  requirements of the 1933 Act, the 1934 Act or any of the rules or
regulations  under  either  thereof  or (2) due to such  Registration  Statement
containing any untrue statement of material fact or omitting to state a material
fact required to be stated therein or necessary to make the  statements  therein
not  misleading  or any other failure of such  Registration  Statement to comply
with the rules and regulations of the SEC; or

           6) The Corporation shall fail or default in the timely performance of
any material  obligation to a holder of shares of Series D Preferred Stock under
the terms of this Amended and Restated Certificate of Incorporation or under the
Exchange Agreement or any other agreement or document entered into in connection
with the issuance of shares of Series D Preferred  Stock, as such agreements and
instruments may be amended from time to time.

           "Optional Redemption Percentage" means 118%.

           "Optional  Redemption  Price"  means an amount  in cash  equal to the
product  obtained by  multiplying  (a) the sum of (i) $1,000 plus (ii) an amount
equal to the  accrued  but unpaid  dividends  on the share of Series D Preferred
Stock to be redeemed and any Arrearage  Interest on dividends thereon in arrears
to the applicable  Optional  Redemption  Date times (b) the Optional  Redemption
Percentage.

           "Parity   Dividend   Stock"   means   any  class  or  series  or  the
Corporation's  capital  stock  ranking,  as to  dividends,  on a parity with the
Series D Preferred Stock.

           "Parity   Liquidation  Stock"  means  any  class  or  series  of  the
Corporation's  capital stock ranking, as to liquidation rights, on a parity with
the Series D Preferred Stock.

           "Permitted  Indebtedness" means (i) Indebtedness which is outstanding
and which would be reflected  on a balance  sheet of the  Corporation  as of the
Issuance  Date  prepared  in  accordance  with  Generally  Accepted   Accounting
Principles  and (ii)  Indebtedness  incurred to finance (A) inventory or (B) the
lease or  purchase of  equipment  (which  Indebtedness  shall be secured by such
equipment) used in the Corporation's  business,  the outstanding  amount thereof
which does not exceed $10,000,000 during the first year after the Issuance Date,



                                       7
<PAGE>

$15,000,000  during the  second  year after the  Issuance  Date and  $30,000,000
during the third year after the Issuance Date.

           "Person"  means  an  individual,  partnership,  corporation,  limited
liability company, trust, incorporated organization, unincorporated association,
joint stock company, government, governmental agency or political subdivision.

           "Redemption Date" means December 30, 1998.

           "Redemption  Notice" means a Redemption  Notice  substantially in the
form set forth in Section 14(b).

           "Redemption  Price"  means an  amount  in cash  equal to the  product
obtained by  multiplying  (i) the sum of (A) $1,000 plus (B) an amount  equal to
the accrued but unpaid dividends on such share of Series D Preferred Stock to be
redeemed and any Arrearage  Interest on dividends thereon in arrears to the date
of payment of the Redemption Price times (ii) 130%.

           "Registrable  Securities"  means the shares of Common Stock  issuable
upon  conversion of shares of Series D Preferred  Stock and the shares of Common
Stock  issuable as dividends on the Series D Preferred  Stock,  and any stock or
other  securities  into which or for which the  Common  Stock may  hereafter  be
changed, converted or exchanged by the Corporation or its successor, as the case
may be, and any other securities issued to holders of such Common Stock (or such
shares  into  which or for  which  such  shares  are so  changed,  converted  or
exchanged) upon any  reclassification,  share  combination,  share  subdivision,
share dividend, merger, consolidation or similar transaction or event.

           "Registration  Statement"  shall  have  the  meaning provided  in the
Exchange Agreement.

           "SEC" means the United  States  Securities  and Exchange  Commission.

           "Senior  Dividend  Stock"  means the Series C Preferred  Stock of the
Corporation  and any other class or series of capital  stock of the  Corporation
ranking senior as to dividends to the Series D Preferred Stock.

           "Senior  Liquidation Stock" means the Series C Preferred Stock of the
Corporation  and any other class or series of capital  stock of the  Corporation
ranking senior as to liquidation rights to the Series D Preferred Stock.

           "Series  C  Conversion   Agent"  means   Boston   EquiServe   Limited
Partnership,  as Servicing  Agent for  BankBoston,  N.A., or its duly  appointed
successor  who shall be serving as transfer  agent and  registrar for the Common
Stock and who shall have been authorized by the Corporation to act as conversion
agent for the Series C Preferred Stock.

           "Series C  Conversion  Date"  means (1) the date on which a notice of
conversion  of Series C  Preferred  Stock is  actually  received by the Series C
Conversion Agent,  whether by mail,  courier,  personal service,  telephone line
facsimile  transmission  or other means,  in case of a  conversion  of shares of
Series  C  Preferred  Stock  pursuant  to  Section  8(b)(i);  or (2) the  fourth



                                       8
<PAGE>

anniversary  of the  Issuance  Date,  in the case of a  conversion  of shares of
Series C Preferred Stock pursuant to Section 8(b)(ii).

           "Series  C  Conversion  Price"  means an  amount  equal to 85% of the
average  Closing Price of the Common Stock for the ten Trading Day period ending
three Trading Days prior to the Series C Conversion Date.

           "Series D  Conversion  Agent"  means  BankBoston,  N.A.,  or its duly
appointed  successor,  who shall  serve as  conversion  agent  for the  Series D
Preferred Stock.

           "Series  D  Conversion  Date"  means  the  date on  which a  Series D
Conversion Notice is actually received by the Series D Conversion Agent, whether
by mail,  courier,  personal service,  telephone line facsimile  transmission or
other  means,  in case of a  conversion  of shares of Series D  Preferred  Stock
pursuant to Section 8(c)(i).

           "Series D Conversion Notice" means a Notice of Conversion of Series D
Convertible  Preferred  Stock  substantially  in the form set  forth in  Section
14(a).

           "Series D Conversion  Price" means the lesser of (a) $1.125 per share
(subject  to  equitable  adjustments  from  time  to time  on  terms  reasonably
acceptable to the Majority  Holders for (i) stock splits,  (ii) stock dividends,
(iii) combinations, (iv) capital reorganizations, (v) issuance to all holders of
Common  Stock of rights or  warrants to purchase  shares of Common  Stock,  (vi)
distribution  by the  Corporation to all holders of Common Stock of evidences of
indebtedness  of the  Corporation  or cash (other than  regular  quarterly  cash
dividends),  (vii) Tender Offers by the  Corporation or any  Subsidiary  for, or
other repurchases of shares of, Common Stock in one or more transactions  which,
individually or in the aggregate, result in the purchase of more than 10% of the
Common  Stock  outstanding,  and (viii)  similar  events  relating to the Common
Stock,  in each case which occur,  or with respect to which "ex-" trading of the
Common  Stock  begins,  on or after  December  9,  1998,  and on or  before  the
applicable  Series D Conversion  Date) and (b) on any Series D Conversion  Date,
90% of the lowest per share  Trading  Price  during the  applicable  Measurement
Period for such Series D Conversion  Date in a trade in which neither the Holder
nor any of its Affiliates  was the seller,  subject to adjustment in the case of
such clause (a) and clause (b) in accordance with Section 7(c).

           "Series D Preferred  Stock" means the Series D Convertible  Preferred
Stock of the Corporation.

           "Stockholder  Approval"  shall have  the  meaning  provided  in   the
Exchange Agreement.

           "Tender Offer" means a tender offer or exchange offer.

           "Trading Day" means a day on whichever of (x) the national securities
exchange,  (y) Nasdaq or (z) such  other  securities  market,  which at the time
constitutes  the  principal  securities  market for the Common Stock is open for
general trading of securities.

           "Trading Price" on any date means the lowest sale price (regular way)
for one share of the Common Stock on such date,  on the first  applicable  among
the  following:  (a) the  national  securities  exchange  on which the shares of



                                       9
<PAGE>

Common Stock are listed which  constitutes the principal  securities  market for
the  Common  Stock,  (b)  Nasdaq,  or (c) such  other  securities  market  which
constitutes  the principal  securities  market for the Common Stock, in any such
case as reported by  Bloomberg,  L.P. or if no such sale prices are so reported,
then the  representative  bid price of the Common Stock as quoted by a broker or
dealer  which  is a  member  firm of the NASD (in  each  such  case  subject  to
equitable  adjustment  from time to time on terms  reasonably  acceptable to the
Majority Holders for (i) stock splits, (ii) stock dividends, (iii) combinations,
(iv)  capital  reorganizations,  (v)  issuance to all holders of Common Stock of
rights or warrants to purchase  shares of Common Stock at a price per share less
than  the  Trading  Price  which  would   otherwise  be  applicable,   (vi)  the
distribution  by the  Corporation to all holders of Common Stock of evidences of
indebtedness  of the  Corporation  or cash (other than  regular  quarterly  cash
dividends),  (vii) Tender  Offers by the  Corporation  or any  subsidiary of the
Corporation  or other  repurchases  of  shares  of  Common  Stock in one or more
transactions which, individually or in the aggregate,  result in the purchase of
more  than 10% of the  Common  Stock  outstanding,  and  (viii)  similar  events
relating  to the Common  Stock,  in each such case  which  occur on or after the
Issuance Date); provided,  however, that if on any Trading Day there shall be no
reported sale price (regular way) of such security,  the "Trading Price" on such
Trading Day shall be the lowest sale price (regular way) of such security on the
Trading Day next  preceding such Trading Day on which a sale price (regular way)
for such security has been so reported.

           2.  Rank.   The shares of Series C Preferred  Stock shall rank senior
to the Series D Preferred  Stock, and both  the Series C Preferred Stock and the
Series D Preferred Stock shall rank senior to the Series A Preferred  Stock  and
the  Common  Stock  and any  shares of any other series  of  Preferred  Stock or
any  shares  of any  other class of preferred stock of the  Corporation,  now or
hereafter issued, as to payment of  dividends  and  distribution  of assets upon
liquidation, dissolution, or winding up of the Corporation, whether voluntary or
involuntary.  However,  the  relative  rank of the Series D  Preferred Stock to 
future  issuances may be altered  by written  consent of the Majority Holders in
advance of such issuance.

           3.  Dividend Rights.

               a.  Series A Preferred Stock.  Subject to the rights of series of
Preferred Stock which may from time to time come into  existence,  the  holders
of  the  Series A  Preferred Stock shall be entitled to receive,  when  and  as 
declared by the Board of Directors, out of any assets of the corporation legally
available therefor, such  dividends as may be declared  from time to time by the
Board of Directors.   The Board of  Directors  shall not pay any dividend to the
holders of the Common Stock unless and until it has paid an equivalent dividend,
on a pro rata per share basis, to the holders of the Series A Preferred Stock.

               b.  Series C Preferred  Stock.  The holders of shares of Series C
Preferred Stock shall be  entitled  to receive,  when,  as, and if  declared  by
the  Board  of  Directors  out of funds  legally  available  for such  purpose, 
dividends  paid semi-annually on May 31 and November 30 of each year to the 
holders of record of such  shares  on  March  31 and  September 30 of such  year
as  follows:  (i)  a  stock-on-stock  dividend  of $10.00 per  annum,  paid in  
arrears,  in shares of  Common Stock (valued at 85% of the average closing price
of the Common Stock for the ten Trading Day  period  ending three Trading Days 
prior to the date on which  the  dividend  is  paid);  plus  (ii) a cash  amount
equaling  0.00005%  of the Company's  United  States net sales,  if any, for the



                                       10
<PAGE>

preceding two  calendar quarters of its SP-303/Provir  product for the treatment
of diarrhea less $5.00  (the value of the semi-annual stock dividend). Dividends
on the shares of Series C Preferred  Stock shall be  cumulative.   If under  
Delaware law, the Company is unable  to pay the cash  amount  of the  dividends,
then  this  portion  of the  dividends  shall be  payable  in shares of Common  
Stock  (valued  at 85% of the average  closing price of the Common Stock for the
ten Trading Day period ending three Trading Days prior to the date on which the 
dividend is paid).

                c.  Series D Preferred Stock

                    (i) The  holders  of  shares  of  Series D  Preferred  Stock
shall be entitled to receive,  when,  as, and if  declared  by  the  Board  of  
Directors out of funds legally available for such purpose, dividends at the rate
of $55 per annum per share, and no more (except as otherwise provided herein),
which shall be fully  cumulative,  shall accrue without interest (except as
otherwise  provided  herein as to  dividends  in arrears)  from the date of
original  issuance of each share of Series D  Preferred  Stock and shall be
payable  quarterly on each  Dividend  Payment Date of each year  commencing
February 1, 1999 (except that if any such date is not a Business  Day, then such
dividend  shall  be  payable  on the  next  succeeding  day that is a Business
Day) to holders of record as they appear on the stock books of the  Corporation 
on such record dates, not more than ten nor less than five days preceding  the 
payment  dates  for  such  dividends,  as  shall  be fixed  by  the  Board.   
Notwithstanding any other provision hereof, the rate of dividends on the shares 
of Series D  Preferred  Stock  shall be subject to  increase  in accordance with
Section 7(c)(ii)(b)(iv).

           Dividends  on the Series D Preferred  Stock shall be paid in cash or,
subject to the  limitations in Section  3(c)(ii),  shares of Common Stock or any
combination of cash and shares of Common Stock, at the option of the Corporation
as hereinafter provided. The amount of the dividends payable per share of Series
D  Preferred  Stock for each  quarterly  dividend  period  shall be  computed by
dividing the annual dividend amount by four. The amount of dividends payable for
the  initial  dividend  period  and any  period  shorter  than a full  quarterly
dividend  period  shall be  computed  on the basis of a  360-day  year of twelve
30-day  months.  Dividends not paid on a Dividend  Payment Date,  whether or not
such dividends have been declared,  will bear Arrearage  Interest until paid. No
dividends or other distributions,  other than dividends payable solely in shares
of any  Junior  Dividend  Stock,  shall be paid or set apart for  payment on any
shares  of  Junior  Dividend  Stock,  and  no  purchase,  redemption,  or  other
acquisition  shall be made by the  Corporation of any shares of Junior  Dividend
Stock  unless  and  until all  accrued  and  unpaid  dividends  on the  Series D
Preferred  Stock and  Arrearage  Interest  on  dividends  in arrears at the rate
specified herein shall have been paid or declared and set apart for payment.

           If at any time any dividend on any Senior  Dividend Stock shall be in
default,  in whole or in part,  no dividend  shall be paid or  declared  and set
apart for payment on the Series D Preferred  Stock  unless and until all accrued
and unpaid  dividends with respect to the Senior Dividend  Stock,  including the
full  dividends for the then current  dividend  period,  shall have been paid or
declared and set apart for payment, without interest. No full dividends shall be
paid or declared and set apart for payment on any Parity  Dividend Stock for any
period  unless all  accrued  but unpaid  dividends  (and  Arrearage  Interest on
dividends in arrears) have been, or contemporaneously  are, paid or declared and
set apart for such payment on the Series D Preferred  Stock.  No full  dividends
shall be paid or  declared  and set apart for  payment on the Series D Preferred



                                       11
<PAGE>

Stock for any period  unless all  accrued  but unpaid  dividends  have been,  or
contemporaneously  are, paid or declared and set apart for payment on the Parity
Dividend Stock for all dividend  periods  terminating on or prior to the date of
payment of such full  dividends.  When  dividends  are not paid in full upon the
Series D Preferred Stock and the Parity  Dividend  Stock,  all dividends paid or
declared and set apart for payment upon shares of Series D Preferred  Stock (and
Arrearage  Interest on dividends in arrears) and the Parity Dividend Stock shall
be paid or declared  and set apart for  payment pro rata,  so that the amount of
dividends  paid or declared  and set apart for payment per share on the Series D
Preferred  Stock and the Parity  Dividend  Stock shall in all cases bear to each
other the same ratio that accrued and unpaid  dividends  per share on the shares
of Series D Preferred Stock and the Parity Dividend Stock bear to each other.

           Any references to "distribution" contained in this Section 3(c) shall
not be deemed to include any stock dividend or distributions  made in connection
with any liquidation,  dissolution,  or winding up of the  Corporation,  whether
voluntary or involuntary.

                    (ii) If the  Corporation  elects in the exercise of its sole
discretion   to  issue  shares  of  Common  Stock in payment of dividends on the
Series D  Preferred  Stock  with  respect  to any  Dividend  Payment  Date,  the
Corporation shall (1) give notice to the holders of the Series D Preferred Stock
at  least  14  days  prior  to  the  applicable  Dividend  Payment  Date  of the
Corporation's  election to exercise  such right and (2) deliver,  or cause to be
delivered,  by the third  Trading Day after such  Dividend  Payment Date to each
holder of such shares the number of whole shares of Common  Stock  arrived at by
dividing  the  per  share  Series  D  Conversion  Price  (determined  as if  the
applicable Dividend Payment Date were a Series D Conversion Date) of such shares
of Common  Stock into the total  amount of cash  dividends  such holder would be
entitled to receive if the aggregate  dividends on the Series D Preferred  Stock
held by such  holder  which are being paid in shares of Common  Stock were being
paid in cash;  provided,  however,  that if  shares  of  Common  Stock  for such
dividend are not delivered to holders of Series D Preferred Stock on or prior to
the third Trading Day after a Dividend Payment Date, then the Corporation  shall
not be  entitled  to pay such  dividend  in  shares  of  Common  Stock  and such
dividend,  together with Arrearage Interest from the applicable Dividend Payment
Date,  shall be payable  solely in cash.  No  fractional  shares of Common Stock
shall be issued in payment of dividends.  In lieu thereof, the Corporation shall
pay cash in an  amount  equal to the  product  of (x) the  Trading  Price of the
Common Stock for the 12  consecutive  Trading Days ending on and  including  the
Trading Day  immediately  preceding  such  Dividend  Payment  Date times (y) the
fraction of a share of Common  Stock which  would  otherwise  be issuable by the
Corporation.  The  Corporation  shall not  exercise its right to issue shares of
Common Stock in payment of dividends on Series D Preferred Stock if:

                         (A) the  number of shares of Common  Stock at the  time
authorized,  unissued and unreserved for all purposes,  together with the number
of shares of Common Stock held in the Corporation's treasury, is insufficient to
pay the portion of such dividends to be paid in shares of Common Stock;



                                       12
<PAGE>

                         (B) the  issuance or delivery of shares of Common Stock
as a  dividend  payment  would  require  registration  with or  approval  of any
governmental  authority  under any law or regulation,  and such  registration or
approval has not been effected or obtained;

                         (C) the shares  of Common Stock  to  be  issued   as  a
dividend payment have not  been  authorized  for listing, upon  official  notice
of issuance,  on any securities  exchange or market on which the Common Stock is
then  listed;  or have not been  approved  for  quotation if the Common Stock is
traded in the over-the-counter market;

                          (D) the  Series  D  Conversion  Price  (determined as 
if the applicable Dividend Payment Date were a Series D Conversion Date) is less
than the par value of one share of Common Stock;

                          (E)  the shares of Common  Stock t o be issued  as  a
dividend (1) cannot  be  sold or  transferred without restriction by holders  of
shares of Series D Preferred Stock  who receive such shares of Common Stock as a
dividend  payment and who are not  Affiliates of the  Corporation or (2) are  no
longer listed on the NYSE, the AMEX  or the Nasdaq; 

                          (F) the issuance of shares of Common  Stock in payment
of dividends  on Series  D Preferred Stock  held  by  any  holder of  shares  of
Series D Preferred Stock  would  result in such holder (including all Aggregated
Persons of such holder) beneficially owning more than 4.9% of the Common  Stock,
determined  as provided in the proviso to the second sentence of Section  8(c)
(i)(a) or would result in the issuance to such holder (including all  Aggregated
Persons of such holder) of an  aggregate  number of shares of Common Stock upon
conversion of shares of Series D Preferred Stock or in payment of dividends on
shares of Series D Preferred Stock in excess of the 4.9% limitation provided  in
Section 8(c)(i)(b); 

                          (G) an Optional Redemption Event shall  have  occurred
and on the  applicable  Dividend  Payment Date any holder of shares of  Series D
Preferred  Stock  shall be  entitled  to exercise  optional redemption  rights  
under  Section  7(c)(ii)  hereof by reason of such  Optional Redemption Event or
shall  have  exercised  such  optional  redemption  rights and  the  Corporation
shall not have paid the applicable Optional Redemption Price.

           Shares of Common  Stock  issued in payment of  dividends  on Series D
Preferred Stock pursuant to this Section shall be, and for all purposes shall be
deemed to be,  validly  issued,  fully paid and  nonassessable  shares of Common
Stock  of  the  Corporation;   the  issuance  and  delivery  thereof  is  hereby
authorized; and the dispatch in full thereof will be, and for all purposes shall
be deemed to be,  payment in full of the  cumulative  dividends to which holders
are entitled on the applicable Dividend Payment Date.

                    (iii)  Neither the Corporation  nor any subsidiary  of  the
Corporation  shall  (1) make   any  Tender  Offer for  outstanding  shares    of
Common Stock, unless the Corporation contemporaneously therewith makes an offer,
or (2) enter into an agreement  regarding a Tender Offer for outstanding  shares
of Common Stock by any Person other than the  Corporation  or any  subsidiary of
the  Corporation,  unless such Person  agrees  with the  Corporation  to make an
offer,  in either  such case to each  holder of  outstanding  shares of Series D



                                       13
<PAGE>

Preferred  Stock to  purchase  for cash at the time of  purchase  in such Tender
Offer the same  percentage  of shares of Series D  Preferred  Stock held by such
holder as the  percentage  of  outstanding  shares of Common Stock offered to be
purchased in such Tender Offer at a price per share of Series D Preferred  Stock
equal to the greater of (i) the quotient obtained by dividing (a) the sum of (1)
$1,000  plus (2) an amount  equal to the accrued  but unpaid  dividends  on such
share of  Series D  Preferred  Stock and any  Arrearage  Interest  on  dividends
thereon in arrears to the date of purchase pursuant to this Section 3(c)(iii) by
(b) 0.9 and (ii) an amount equal to the product  obtained by multiplying (x) the
number of shares of Common Stock which would,  but for the purchase  pursuant to
such Tender Offer,  be issuable on conversion in accordance with Section 9(a) of
one share of Series D Preferred Stock if a Series D Conversion Notice were given
by the holder of such share of Series D Preferred  Stock on the date of purchase
pursuant to such Tender Offer  (determined  without  regard to any limitation on
beneficial  ownership  contained in the second sentence of Section 8(c)(i)(a) or
in Section  8(c)(i)(b)  times (y) the price per share of Common Stock offered in
such Tender Offer.

           4. Series D Preferred Stock Capital. The amount to be represented in 
the capital  account for  the Series D Preferred Stock  at  all times  for  each
outstanding  share of Series D Preferred Stock shall be an amount at least equal
to the sum of (1) $1,000 plus (2) to the extent that the corporation has surplus
in its capital  account,  an amount equal to the accrued but unpaid dividends on
such share of Series D Preferred  Stock and any Arrearage  Interest on dividends
thereon in arrears to the date of determination  plus (3) to the extent that the
corporation has surplus in its capital  account,  an amount equal to the product
obtained by  multiplying  (a) the sum of (1) $1,000 plus (2) an amount  equal to
the accrued but unpaid  dividends on such share of Series D Preferred  Stock and
any  Arrearage  Interest  on  dividends  thereon  in  arrears  to  the  date  of
determination  times (b) 18%. Upon  original  issuance of each share of Series D
Preferred  Stock,  an amount  equal to $1,000  shall be credited to the Series D
Preferred Stock capital  account of the  corporation  and, to the extent at such
time the corporation has surplus in its capital account,  an amount equal to the
amount  specified  in the  preceding  clause  (3) (or so much  thereof  as is in
surplus)  shall be  transferred  from  surplus to the Series D  Preferred  Stock
capital  account.  If at any time the  corporation  shall have  credited  to the
Series D Preferred  Stock capital  account less than the full amount required by
the preceding  clauses (1) through (3), then (x) if at any time  thereafter  the
corporation  has surplus in its capital  account,  the  corporation  immediately
shall transfer  surplus to the Series D Preferred  Stock capital  account to the
extent  available  and  necessary to satisfy the  requirements  of the preceding
clauses (1) through (3), (y)  notwithstanding  the particular shares of Series D
Preferred  Stock in  respect of which an amount in excess of $1,000 per share of
Series D Preferred  Stock shall have been  transferred to the Series D Preferred
Stock capital account, any amount in excess of $1,000 for each outstanding share
of Series D Preferred Stock shall be treated as Series D Preferred Stock capital
pro rata for all outstanding shares of Series D Preferred Stock and (z) upon any
conversion of a share of Series D Preferred Stock, an amount equal to $0.001 per
share of common  stock  issued  upon such  conversion  shall be  credited to the
common  stock  capital  account and the balance in the Series D Preferred  Stock
capital  account in respect of such converted  share of Series D Preferred Stock
shall be retained in the Series D Preferred Stock capital account, to the extent
required  under the preceding  clauses (1) through (3).  Nothing in this Section
shall require the  corporation  in a balance sheet  prepared in accordance  with
generally accepted  accounting  principles to reflect more than $1,000 per share
in Series D Preferred  Stock capital for purposes of such balance sheet, if such
presentation  would not be in  accordance  with  generally  accepted  accounting



                                       14
<PAGE>

principles,  so long as the  notes  to any  such  balance  sheet  make  adequate
disclosure of the  requirements of this Section and the capital  accounts of the
corporation  for  purposes  of the  general  corporation  law of  the  state  of
Delaware.
           
          5.  Liquidation Preference.

               a. In the event of a liquidation, dissolution, or winding up of 
the  Corporation,  whether voluntary or involuntary, the  holders  of Series   C
Preferred  Stock shall be entitled to receive,  prior and in  preference  to any
distribution  to the  holders  of the  Series D  Preferred  Stock,  the Series A
Preferred  Stock,  and the Common Stock,  out of the assets of the  Corporation,
whether  such assets  constitute  stated  capital or surplus of any  nature,  an
amount per share of Series C Preferred  Stock equal to $100.00  plus any accrued
and  unpaid  dividends  and no  more.  In  the  event  that  the  assets  of the
Corporation are insufficient to make the foregoing distribution, then the entire
assets  of the  Corporation  available  for  distribution  shall be  distributed
ratably  among the  holders  of the  Series C  Preferred  Stock and any stock on
parity with the Series C Preferred  Stock with respect to liquidation  rights in
proportion to the respective preferential amounts to which each is entitled (but
only to the extent of such preferential  amounts).  After payment in full of the
liquidation  price of the shares of the Series C Preferred Stock with respect to
liquidation  rights,  the  holders of such  shares  shall not be entitled to any
further participation in any distribution of the assets by the Corporation.

               b. Upon the completion of the  distribution  required by Section 
5(a) above, if  any assets  remain  in  the  Corporation,  the holders of Series
D Preferred  Stock shall be entitled to receive out of such remaining  assets of
the Corporation, whether such assets constitute stated capital or surplus of any
nature, an amount per share of Series D Preferred Stock equal to the Liquidation
Preference (as defined  above) and no more,  before any payment shall be made or
any assets  distributed  to the holders of Junior  Liquidation  Stock,  provided
however,  that such  rights  shall  accrue to the  holders of Series D Preferred
Stock  only in the event that the  Corporation's  payments  with  respect to the
liquidation preference of the holders of Senior Liquidation are fully met. After
the liquidation  preferences of the Senior  Liquidation Stock are fully met, the
entire assets of the Corporation available for distribution shall be distributed
ratably  among the  holders  of the  Series D  Preferred  Stock  and any  Parity
Liquidation Stock in proportion to the respective  preferential amounts to which
each is entitled (but only to the extent of such  preferential  amounts).  After
payment in full of the liquidation price of the shares of the Series D Preferred
Stock and the Parity  Liquidation Stock, the holders of such shares shall not be
entitled  to any  further  participation  in any  distribution  of assets by the
Corporation. In the event that the assets of the Corporation are insufficient to
make the  foregoing  distribution,  then the  entire  assets of the  Corporation
available for distribution shall be distributed ratably among the holders of the
Series D  Preferred  Stock and any stock on parity  with the Series D  Preferred
Stock with respect to  liquidation  rights  in  proportion  to   the  respective
preferential  amounts to which each is entitled  (but only to the extent of such
preferential  amounts).  With respect to the Series D Preferred Stock, neither a
consolidation or merger of the Corporation  with another  corporation nor a sale
or transfer of all or part of the Corporation's assets for cash, securities,  or
other property in and of itself will be considered a  liquidation,  dissolution,
or winding up of the Corporation.




                                       15
<PAGE>

               c. After  payment in full of the liquidation  price as set  forth
above in Sections 5(a) and 5(b) above, if assets remain in the corporation,  the
holders of Series A Preferred  Stock shall be entitled to receive,  prior and in
preference  to any  distribution  of any of the assets or  surplus  funds of the
Corporation  to the  holders  of the Common  Stock by reason of their  ownership
thereof,  the  amount of  $8.147  (the  "Original  Issue  Price")  per share (as
adjusted for any stock  dividends,  combinations  or splits with respect to such
shares) plus all accrued or declared but unpaid dividends on such share for each
share  of  Series  A  Preferred  Stock  then  held by such  holder.  If upon the
occurrence  of such  event,  the  assets and funds  thus  distributed  among the
holders of the Series A  Preferred  Stock  shall be  insufficient  to permit the
payment to such  holders of the full  aforesaid  preferential  amount,  then the
entire assets and funds of the Corporation  legally  available for  distribution
shall be distributed  ratably among the holders of the Series A Preferred  Stock
in proportion to the preferential  amount each such holder is otherwise entitled
to receive.  

               d. After payment to the holders of the Series C Preferred  Stock,
Series D Preferred  Stock, and Series A Preferred Stock of the amounts set forth
in Sections 5(a), (b), and (c), respectively, above, the entire remaining assets
and funds of the Corporation  legally available for distribution,  if any, shall
be distributed  among the holders of the Common Stock and the Series A Preferred
Stock in  proportion  to the  shares of Common  Stock  then held by them and the
shares of Common Stock which they then have the right to acquire upon conversion
of the  shares of Series A  Preferred  Stock then held by them.  The  holders of
Series C Preferred  Stock and Series D Preferred  Stock shall not be entitled to
any further  participation  in any  distribution  of assets by the  Corporation,
other than payment as set forth in Section 5(a) and 5(b), respectively.  

               e. With  respect  to  the  Series  A Preferred  Stock,  Series  C
Preferred Stock and Series D Preferred  Stock (except as limited with respect to
Series D Preferred Stock as set forth in Section 5(b) above),(i) any acquisition
of the Corporation  by means of merger or other form of corporate reorganization
in which outstanding shares of the  Corporation  are exchanged for securities or
other consideration issued, or caused to be issued, by the acquiring corporation
or its subsidiary (other  than a  mere  reincorporation  transaction)  or  (ii) 
a sale  of all or substantially  all  of  the  assets  of  the  Corporation  or 
(iii)   any  other  transaction  or series  of related  transactions   by  the  
Corporation in which in  excess of 50% of the  Corporation's  voting  power  is 
transferred, shall be treated as a liquidation, dissolution or winding up of the
Corporation and shall entitle the holders of Series C Preferred Stock and Series
A Preferred Stock to receive at the closing thereof the amount as specified in 
Section 5(a) and Section 5(c), respectively.  

               f. With  respect to the holders of Series A  Preferred  Stock and
Series C Preferred Stock,  whenever the distribution provided for the holders of
the Series A Preferred Stock in this Section 5 shall be payable in securities or
property  other than cash, the value of such  distribution  shall be as follows:

                    (i)  Securities  not subject to  investment  letter or other
similar restrictions on free marketability:




                                       16
<PAGE>

                         (A) If traded on a securities exchange, the value shall
be deemed to be the  average  of the  closing  prices of the securities  on such
exchange  over the 30-day period ending  three (3) days prior to the closing;

                   
                         (B) If  actively  traded  over-the-counter,  the  value
shall be deemed to be the average of the closing bid or sale prices  (whichever
are applicable)  over  the 30-day  period  ending three (3) days prior  to  the 
closing; and
                    
                         (C) If there is no  active  public  market,  the  value
shall be the fair market value  thereof,  as  determined  in good faith by the
Board of Directors of the Corporation.

                     (ii) The method  of  valuation  of  securities  subject to 
investment letter  or other restrictions on  free  marketability  (other    than
restrictions  arising solely by virtue of a stockholder's status as an affiliate
or former  affiliate)  shall be to make an appropriate  discount from the market
value determined as above in (i) (A), (B) or (C) to reflect the approximate fair
market value  thereof,  as determined in good faith by the Board of Directors of
the Corporation.

                     (iii) In the event of any bona-fide  dispute  between the 
Corporation  and one or more  holders of the  Series A  Preferred  Stock as   to
any fair market value  determination  under clauses  (i)(C) or (ii) above,  such
dispute shall be resolved  through  binding  arbitration  under the rules of the
American  Arbitration  Association,  with the  arbitration  panel  consisting of
persons  familiar  with the  valuation  of public and private  entities and such
panel being  advised,  as to such  valuation  issues,  by an investment  bank of
nationally   recognized  standing,   the  costs  thereof  to  be  borne  by  the
non-prevailing party.

           6.  No Sinking Fund.  The shares of Series D Preferred  Stock  shall
not be entitled to the benefits of  any  sinking  fund for the  redemption  or  
repurchase  of  shares  of  Series D Preferred Stock.

           7.  Redemption.

               (a) Series A Preferred  Stock.   The  Series  A Preferred Stock 
is not redeemable.

               (b) Series C  Preferred   Stock.   The  Series  C Preferred Stock
is not redeemable.

               (c) Series D Preferred  Stock.   The  Series  D Preferred   Stock
is   subject   to  the   following   redemption provisions:

                   (i)  Redemption at Option of Corporation.

                        (A) Optional Redemption.

                            (1) So  long as (x) the  Corporation  shall  be in  
compliance  in  all  material  respects  with its obligations  to the holders of
the Series D Preferred Stock  (including,  without  limitation,  its obligations



                                       17
<PAGE>

under the  Exchange  Agreement  and this  Amended and  Restated  Certificate  of
Incorporation)  and (y) on the date the Corporation  gives the Redemption Notice
and on the  Redemption  Date,  the  Corporation  has Cash  and  Cash  Equivalent
Balances (excluding  investment  securities) which are sufficient,  after taking
into account the Corporation's cash requirements during the period from the date
the  Redemption  Notice is given to the  Redemption  Date, to pay the Redemption
Price of the shares of Series D Preferred Stock to be redeemed,  the Corporation
shall  have the right to  redeem  all or any part of the  outstanding  shares of
Series D Preferred  Stock pursuant to this Section  7(c)(i)(A) at the Redemption
Price.  In order to exercise its right of redemption  under this Section 7(c)(i)
(A), the Corporation  shall give a Redemption Notice to the holders of shares of
Series D  Preferred  Stock not less  than 20 or more  than 30 days  prior to the
Redemption Date.

                            (2)  On  the Redemption   Date (or such  later  date
as  a  holder  of  shares  of Series D Preferred  Stock shall  surrender  to the
Corporation  the  certificate(s)  for the  shares  of Series D  Preferred  Stock
redeemed),  the  Corporation  shall pay to or upon the  order of each  holder of
shares of Series D Preferred  Stock by wire  transfer of  immediately  available
funds to such account as shall be  specified  for such purpose by such holder in
an amount equal to the Redemption Price of all of such holder's shares of Series
D Preferred Stock to be redeemed. A holder of shares of Series D Preferred Stock
which are redeemed pursuant to this Section 7(c) (i)(A) shall not be entitled to
payment of the Redemption Price of such shares of Series D Preferred Stock until
such holder shall have surrendered the  certificate(s) for such shares of Series
D  Preferred  Stock to the  Corporation  or, in the case of the  loss,  theft or
destruction of any such certificate,  given indemnity in accordance with Section
13. If the Corporation  shall fail to pay the Redemption  Price of any shares of
Series D Preferred  Stock in full when due,  then the amount  thereof shall bear
interest to the extent not  prohibited by applicable  law at the rate of 12% per
annum from the due date thereof until paid in full.

                            (3)  Notwithstanding  the   giving of a   Redemption
Notice,  each holder of shares of Series D Preferred Stock shall be entitled  to
convert in  accordance with  Section 8(c) any shares of Series D Preferred Stock
which are to be redeemed at any time prior to (1) the Redemption Date or (2) if 
the Corporation fails to pay the Redemption Price in full to such holder  on the
Redemption  Date,  the date on which  the  Corporation pays the Redemption Price
in full to such holder for all shares of Series D Preferred Stock to be redeemed
rom such holder.

                            (4) Any redemption of shares of Series D Preferred
Stock  pursuant  to this  Section  7(c)(i)(A)  shall  be  made  as  nearly   as
practical  pro rata from all  holders  of shares  of  Series D  Preferred  Stock
outstanding,  subject to reduction of the shares of Series D Preferred  Stock to
be  redeemed  from any  holder by reason  of  conversions  of shares of Series D
Preferred  Stock of such holder between the date the Redemption  Notice is given
and the Redemption Date.

                            (5)  Upon receipt by the Corporation  from a holder 
of shares of Series D Preferred Stock of certificates for shares of Series D 
Preferred Stock  evidencing a greater number of shares of  Series D  Preferred  
Stock than the number of shares of Series D Preferred  Stock to be redeemed in  
accordance  with this Section  7(c)(i)(A),  the Corporation shall,  within three
Trading Days after such surrender,  issue and deliver to or  upon the order of 



                                       18
<PAGE>

such  holder a new certificate  for the  balance of shares of Series D Preferred
Stock, if any.

                        (B)  No  Other  Redemption  at  the  Option  of the 
Corporation.  Except as otherwise  specifically provided in Section 7(a), the
Corporation  shall  not have  any  right  to  redeem  any  shares of Series D
Preferred Stock at the option of the Corporation.

                   (ii) Redemption  Upon an Optional  Redemption  Event.

                        (a)  Redemption  Right  Upon Optional Redemption  Event.
If an Optional  Redemption Event occurs,  then each holder of shares of Series D
Preferred  Stock  shall  have the  right,  at such  holder's option,  to require
the  Corporation  to redeem all of such  holder's  shares of Series D  Preferred
Stock,  or any portion  thereof,  on the date that is three Business  Days after
the date of the Holder  Notice  given with  respect to such Optional  Redemption
Event.  Each holder of shares of Series D Preferred  Stock shall  have the right
to require the Corporation to redeem  all or any such portion  of such  holder's
shares of Series D  Preferred  Stock if an  Optional Redemption  Event occurs at
any time while any of such holder's shares of Series D  Preferred  Stock  are  
outstanding  at a price per share of Series D Preferred Stock equal to the 
Optional Redemption Price.

                        (b) Notices;  Method  of  Exercising Optional Redemption
Rights, Etc.

                            (i)  On or before the fifth Business Day  after the
occurrence of an Optional Redemption Event, the Corporation  shall  give to each
holder  of  outstanding  shares  of  Series  D Preferred  Stock  a  Corporation 
Notice of the occurrence of such Optional Redemption Event and of the redemption
right set forth  herein  arising  as a result thereof.
The Corporation Notice shall set forth:

                                 (A)  the date by which  the optional redemption
right must be  exercised,  which date shall be at least 30 days after the date 
such Corporation Notice is given, and

                                 (B)  a description of the procedure  (set forth
below) which each such holder must follow to exercise such holder's optional 
redemption right.

                            No failure of the Corporation  to give a Corporation
Notice or defect therein shall limit the right of any holder of shares of Series
D Preferred Stock to exercise the optional  redemption right or affect the 
validity of the  proceedings  for the  redemption of such holder's shares of 
Series D Preferred Stock.

                            (ii) To exercise  its  optional  redemption  right, 
each holder of  outstanding shares of Series D Preferred Stock shall deliver to 
the Corporation on or before the thirtieth  day after a Corporation  Notice is 
given to such holder (or if no Corporation Notice has been given to such holder,
within forty days after such holder  first learns of the Optional  Redemption  
Event) a Holder  Notice to the Corporation  setting  forth  the  name of such  
holder  and the  number  of such holder's shares of Series D Preferred Stock to 



                                       19
<PAGE>

be redeemed.  A Holder Notice may be revoked by such holder  giving such  Holder
Notice by giving  notice of such revocation to the Corporation at any time prior
to the time the Corporation pays the Optional Redemption Price to such holder.

                            (iii) If a holder of  shares of Series D  Preferred 
Stock  shall  have  given a Holder  Notice, on the date which is three  Business
Days after the date such Holder  Notice is given  (or such  later  date as such 
holder  surrenders  such holder's  certificates  for the shares of Series D 
Preferred Stock redeemed) the Corporation shall make payment in immediately  
available funds of the applicable Optional Redemption Price to such account as 
specified by such holder in writing to the Corporation at least one Business Day
prior to the  applicable  redemption  date.  A holder of shares of  Series  D 
Preferred Stock which are redeemed pursuant to this  Section  shall not be  
entitled to payment of the Optional Redemption Price of such  shares of Series D
Preferred  Stock until such holder  shall have surrendered  the  certificate(s) 
for such shares of Series D Preferred Stock to the  Corporation  or, in the case
of the loss,  theft or destruction of any such certificate, given indemnity in
accordance with Section 11. (iv) Notwithstanding any other provision of this 
Amended and Restated  Certificate of  Incorporation, if an Optional  Redemption 
Event occurs by reason of the occurrence of an event described  in clause  (1), 
(2) or (3) of the  definition  of the term  Optional Redemption  Event, and such
occurrence  is by reason  of events  which are not solely within the control of 
the  Corporation,  the  Corporation  shall have the right to give a Control  
Notice to the  holders of shares of Series D  Preferred Stock at any time after 
such Optional  Redemption  Event occurs and prior to the earlier of (1) the date
on which all  holders  of shares of Series D  Preferred Stock who had the right 
(other than as limited by this Section  7(c)(ii)(b))  to require  redemption  of
any shares of Series D Preferred  Stock by reason of the occurrence of such 
Optional  Redemption  Event no longer have such right and (2) the applicable  
Optional Redemption Date by reason of the earliest Holder Notice given by any  
holder of shares  of  Series D  Preferred  Stock by reason of such Optional  
Redemption Event. If the Corporation  timely gives such Control Notice and an  
Adjustment  Notice  (which may be  combined  in a single  notice) to the holders
of shares of Series D Preferred  Stock, then in lieu of payment of the Optional 
Redemption  Price by reason of any such Optional Redemption Event and commencing
on the first date on which such Optional  Redemption Event occurs the following 
adjustments shall take effect:

                            (A)  In  the  case of  an Optional Redemption  Event
described in clause (1) of the definition of the term Optional Redemption Event,
for a period of 180 days after the occurrence of such Optional Redemption  Event
(i) the Series D Conversion  Price will be 80% of the amount which the Series D 
Conversion  Price would  otherwise be and (ii) the cumulative dividend shall 
accrue on each share of the Series D Preferred  Stock at the rate of $180 per 
annum.

                            (B)  In  the case of  an  Optional Redemption  Event
described in clause (2) of the definition of the term Optional Redemption Event,
for so long as such Optional  Redemption Event continues (i) the  Series D  
Conversion  Price  will be 80% of the  amount  which the Series D Conversion  
Price would  otherwise  be and (ii) the  cumulative  dividend  shall accrue on 
each share of Series D Preferred Stock at the rate of $180 per annum.




                                       20
<PAGE>

                            (C)  In  the case  of  an Optional Redemption  Event
described in clause (3) of the definition of the term Optional Redemption Event,
for so long as any shares of Preferred Stock are outstanding (i) the Series D  
Conversion  Price will be 70% of the amount which the Series D Conversion  Price
would  otherwise  be and (ii) the  cumulative  dividend  shall accrue on each 
share of Series D Preferred Stock at the rate of $300 per annum.

           For purposes of this Section 7(c)(ii)(b)(iv),  an Optional Redemption
Event described in clause (1), (2) or (3) of the definition of the term Optional
Redemption  Event shall be deemed to have occurred by reason of events which are
not  solely  within the  control  of the  Corporation  if a  requirement  of the
Corporation to redeem,  or a right of any holder of shares of Series D Preferred
Stock to require  redemption  of,  shares of Series D Preferred  Stock by reason
thereof would result in the Corporation  being required to classify the Series D
Preferred  Stock  as  redeemable  preferred  stock  on a  balance  sheet  of the
Corporation   prepared  in  accordance   with  Generally   Accepted   Accounting
Principles, and, in the case of an Optional Redemption Event described in clause
(3) of the definition of the term Optional  Redemption  Event,  the Board or the
stockholders  of the  Corporation do not have the right to approve or disapprove
the transactions resulting in such event.

                        (d) Other.

                            (1) If the Corporation fails to pay in full when due
the  Optional  Redemption Price for the number of shares of Series D Preferred 
Stock specified in a Holder Notice, then the amount thereof shall bear interest 
to the extent not prohibited by  applicable  law at the rate of 12% per annum 
from the due date thereof until paid in full.

                            (2) In connection  with a redemption  pursuant  to
these  Sections  7(c)(ii)  of  less  than  all  of  the  shares  of  Series  D
Preferred Stock evidenced by a particular certificate, promptly, but in no event
later than  three  Business  Days after  surrender  of such  certificate  to the
Corporation,   the  Corporation  shall  issue  and  deliver  to  such  holder  a
replacement  certificate for the shares of Series D Preferred Stock evidenced by
such  certificate  which have not been redeemed.  

                            (3) A Holder Notice given by a holder of shares of 
Series D Preferred Stock shall be deemed for all purposes to be in proper form 
unless the Corporation  notifies such holder in writing within three  Business 
Days after such Holder Notice has been given (which notice shall specify all 
defects in the Holder Notice),  and any Holder Notice containing any such defect
shall  nonetheless  be  effective  on the date given if such holder promptly 
undertakes in writing to correct all such defects.  Notwithstanding the absence 
of any such undertaking  from such holder, no such claim of error shall limit or
delay performance of the Corporation's obligation to redeem all shares of Series
D Preferred Stock not in dispute.
           


                                       21
<PAGE>

           8.  Conversion.

               a.   Series A Preferred  Stock. The holders of Series A Preferred
Stock have conversion rights as follows:

                    (i)  Right  to  Convert.  Each  share of Series A Preferred 
Stock shall be convertible  into  one  share of Common Stock, as  adjusted   for
any  stock  dividends,  combinations  or splits  with  respect  to such  shares,
provided,  however,  that the minimum number of shares which may be converted at
anyone time shall be 75,000  shares or such lesser  number of shares as shall be
then outstanding.

                    (ii) Automatic Conversion.  Each share of Series A Preferred
Stock shall automatically be converted into Common Stock, upon the earlier to 
occur of:

                         (A)  immediately  in the event  that at any time  prior
to July 23,  1999,  the closing sale price (the "Closing Sale Price") of the 
Corporation's Common Stock (as  listed on the  Nasdaq  National  Market) has for
a period  of sixty  (60) consecutive  trading days exceeded the Original Issue 
Price,  which event shall be  disclosed  to each  holder  of the  Series A  
Preferred  Stock  by  written notification  from the  Corporation,  in which  
event  each  share of  Series A Preferred  Stock  shall  automatically  be  
converted  into one share of Common Stock,  as  appropriately  adjusted for any 
stock  dividends,  combinations  or splits with respect to such shares of Common
Stock; or

                         (B) July 23, 1999,  in which event each share of Series
A Preferred  Stock shall  automatically  be converted into such number of shares
of Common  Stock as equals  the Original  Issue  Price  divided  by  the 
weighted-average  Closing Sale Price for the sixty (60) consecutive trading days
ending two days prior to July 23, 1999, but in no event more than the  Original 
Issue Price  divided by $6.00,  in each case as appropriately  adjusted for any 
stock dividends,  combinations or splits with respect to such shares of Common 
Stock.




                                       22
<PAGE>

                    (iii)  Mechanics of Conversion.  Before any holder of Series
A  Preferred  Stock  shall be entitled to convert the same into shares of Common
Stock,  he shall  surrender  the  certificate  or  certificates therefor,  duly 
endorsed,  at the office of this  Corporation or of any transfer agent for the 
Series A Preferred  Stock,  and shall give written notice by mail, postage 
prepaid, or  by  facsimile,   confirmed by mail, to this  Corporation  at  its 
principal  corporate office, of the election to convert the same and shall state
therein the name or names in which the certificate or certificates for shares of
Common Stock are to be issued.  This  Corporation  shall, as soon as practicable
thereafter,  issue and  deliver  at such  office to such  holder of the Series A
Preferred  Stock, or to the nominee or nominees of such holder, a certificate or
certificates for the number of shares of Common Stock to which such holder shall
be  entitled as  aforesaid.  Such  conversion  shall be deemed to have been made
immediately  prior to the close of business on the date of such surrender of the
Series A Preferred Stock to be converted, or in the case of automatic conversion
pursuant to Section 8(a)(ii),  ten (10) days following  written  notification as
provided in Section 8(a)(ii),  and the person or persons entitled to receive the
shares of Common Stock  issuable upon such  conversion  shall be treated for all
purposes as the record  holder or holders of such  shares of Common  Stock as of
such date.

                    (iv)   Adjustments  to  Conversion Ratio for Stock Dividends
and for  Combinations  or  Subdivisions of Common Stock. In the event that this 
Corporation at any time or from time to time after the purchase date of the 
Series A Preferred shall declare or pay, without consideration,  any dividend on
the Common Stock  payable in Common Stock or in any right to acquire Common 
Stock  for no  consideration,  or  shall  effect  a  subdivision  of the
outstanding  shares of Common  Stock  into a greater  number of shares of Common
Stock (by stock  split,  reclassification  or  otherwise  than by  payment  of a
dividend in Common  Stock or in any right to acquire  Common  Stock),  or in the
event the outstanding  shares of Common Stock shall be combined or consolidated,
by  reclassification  or  otherwise,  into a lesser  number  of shares of Common
Stock,  then the  number  of  shares of Common  Stock  into  which the  Series A
Preferred  Stock  can  be  converted  shall  be  proportionately   decreased  or
increased,  as appropriate.  In the event that this Corporation shall declare or
pay,  without  consideration,  any dividend on the Common  Stock  payable in any
right to acquire Common Stock for no consideration then the Corporation shall be
deemed to have made a dividend  payable  in Common  Stock in an amount of shares
equal to the maximum  number of shares  issuable upon exercise of such rights to
acquire Common Stock.

                    (v)    Adjustments for Reclassification  and Reorganization.
If the Common Stock  issuable  upon  conversion of the Series A Preferred  Stock
shall be changed into the same or a different  number of shares of any other  
class or classes of stock, whether  by capital  reorganization, reclassification
or otherwise (other than a subdivision or combination of shares provided  for in
Section  8(a)(iv)  above or a merger  or other  reorganization referred to in 
Section 5(f) above),  the number of shares of such other class or classes of 
stock into which the Series A Preferred  Stock  shall be  convertible  shall,   
concurrently   with  the   effectiveness  of  such   reorganization  or
reclassification,  be  proportionately  adjusted  so that the Series A Preferred
Stock shall be convertible into, in lieu of the number of shares of Common Stock
which the holders would  otherwise  have been  entitled to receive,  a number of
shares of such  other  class or  classes  of stock  equivalent  to the number of
shares of Common  Stock that would have been  subject to receipt by the  holders
upon conversion of the Series A Preferred Stock immediately before that change.



                                       23
<PAGE>

                    (vi)    No  Impairment.   This  Corporation  will   not, 
 by  amendment   of  its   Certificate   or  through  any   reorganization,
recapitalization,  transfer of assets, consolidation, merger, dissolution, issue
or sale of securities or any other voluntary action,  avoid or seek to avoid the
observance  or  performance  of any of the  terms to be  observed  or  performed
hereunder by this Corporation, but will at all times in good faith assist in the
carrying out of all the provisions of this Section 8(a)(iv) and in the taking of
all such  action as may be  necessary  or  appropriate  in order to protect  the
Conversion  Rights  of the  holders  of the  Series A  Preferred  Stock  against
impairment.

                    (vii)  No  Fractional  Shares  and  Certificate  as  to 
Adjustments.

                        (a)  No  fractional  shares  shall  be  issued  upon
conversion  of the Series A Preferred  Stock,  and the number of shares of
Common Stock to be issued shall be rounded to the nearest  whole share.  Whether
or not fractional  shares are issuable upon such conversion  shall be determined
on the basis of the total  number of Series A  Preferred  Stock the holder is at
the time  converting  into Common Stock and the number of shares of Common Stock
issuable upon such aggregate conversion.

                        (b)  Upon   the   occurrence  of each   adjustment  or
readjustment of the number of shares of Common Stock into which the Series A
Preferred  Stock  can be  converted  pursuant  to this  Section  8(a)(iv),  this
Corporation,   at  its  expense,  shall  promptly  compute  such  adjustment  or
readjustment in accordance with the terms hereof and prepare and furnish to each
holder of Series A Preferred  Stock a certificate  setting forth such adjustment
or  readjustment  and showing in detail the facts upon which such  adjustment or
readjustment is based.  This Corporation  shall, upon the written request at any
time of any holder of Series A Preferred Stock, furnish or cause to be furnished
to such  holder  a like  certificate  setting  forth  (A)  such  adjustment  and
readjustment, (B) the conversion ratio at the time in effect, and (C) the number
of shares of Common Stock and the amount, if any, of other property which at the
time would be received upon the conversion of the Series A Preferred Stock.

                     (viii)    Notices  of  Record  Date.   In  the event of any
taking by this Corporation of a record of the holders of any class of securities
for the  purpose of  determining  the  holders  thereof  who are entitled  to  
receive  any  dividend  (other  than a  cash  dividend)  or  other distribution,
any right to subscribe  for,  purchase or otherwise  acquire any shares of stock
of any class or any other securities or property, or to receive any other right,
this  Corporation  shall  mail to each  holder  of  Series A Preferred Stock, at
least twenty (20) days prior to the date specified therein, a notice  specifying
the date on which  any such  record is to be taken for the purpose of such 
dividend, distribution or right, and the amount and character of such dividend, 
distribution or right.

                    (ix) Reservation  of Stock Issuable  Upon  Conversion.  This
Corporation  shall at all times reserve and keep available out of its authorized
but unissued  shares of Common Stock solely for the purpose of effecting  the  
conversion  of the Series A Preferred  Stock such number of its shares of Common
Stock as shall from time to time be  sufficient  to effect the conversion of all
outstanding  shares  of  the Series A Preferred Stock;  and if at any time the 
number of authorized but unissued shares of Common Stock shall not be sufficient
to effect the  conversion of all the then outstanding  Series A Preferred Stock,
in addition to such other remedies as shall be available to the holder  of such 
Series A  Preferred  Stock,  this  Corporation  will  take such corporate action
as may, in the opinion of its counsel, be necessary to increase its authorized  
but unissued  shares of Common Stock to such number of shares as shall be 
sufficient for such purposes.



                                       24
<PAGE>

                     (x)  Notices.   Any  notice  required  by  the
provisions  of this  Section  8(a)(iv)  to be given to the  holders  of Series A
Preferred  Stock shall be deemed given if  deposited in the United  States mail,
postage prepaid, and addressed to each holder of record at his address appearing
on the books of this Corporation.

                b.   Series  C  Preferred  Stock.  The  holders  of
Series C Preferred Stock have conversion rights as follows:

                     (i)  Conversion  at the Option of the  Holder.
At any time at the option of the holder, Commencing twelve (12) months after the
Issuance  Date,  the holders of the Series C Preferred  Stock may convert at any
time all or from time to time any part of their  outstanding  shares of Series C
Preferred  Stock  into that  number of fully  paid and  nonassessable  shares of
Common  Stock  (calculated  as to each  conversion  to the nearest  1/100th of a
share) as equals the greater of (A) 16.6667  shares of Common  Stock or (B) such
number of shares of Common  Stock as  equals  $100.00  divided  by the  Series C
Conversion Price on the applicable Series C Conversion Date.

                     (ii) Mandatory   Conversion.   Each  share  of
Series C Preferred Stock shall automatically  convert, on the fourth anniversary
of the Issuance Date, into that number of fully paid and nonassessable shares of
Common  Stock  (calculated  as to each  conversion  to the nearest  1/100th of a
share) as equals the greater of (A) 16.6667  shares of Common  Stock or (B) such
number of shares of Common  Stock as  equals  $100.00  divided  by the  Series C
Conversion Price on the applicable Series C Conversion Date.

                     (iii)  Mechanics  of  Conversion.  Before any holder of 
Series C Preferred  Stock shall be entitled to convert the same into shares
of Common Stock, he shall  surrender the  certificate or certificates  therefor,
duly  endorsed,  at the office of the  Transfer  Agent,  and shall give  written
notice by mail,  postage  prepaid,  or by  facsimile,  confirmed by mail, to the
Transfer Agent at its principal corporate office, of the election to convert the
same and  shall  state  therein  the name or names in which the  certificate  or
certificates  for  shares of Common  Stock are to be  issued.  This  Corporation
shall,  as soon as  practicable  thereafter,  issue and  deliver  or cause to be
issued and delivered to such holder of the Series C Preferred  Stock,  or to the
nominee or nominees of such holder, a certificate or certificates for the number
of shares of Common Stock to which such holder  shall be entitled as  aforesaid.
Such conversion shall be deemed to have been made immediately prior to the close
of  business  on the  applicable  Conversion  Date,  and the  person or  persons
entitled to receive the shares of Common  Stock  issuable  upon such  conversion
shall be treated for all purposes as the record holder or holders of such shares
of Common Stock as of such date;  provided,  however,  that a holder of Series C
Preferred  Stock shall not be  entitled  to receive  the shares of Common  Stock
issuable upon any such  conversion  of shares of Series C Preferred  Stock until
such holder  surrenders to the Corporation or the Transfer Agent the certificate
for the shares of Series C Preferred Stock so converted.



                                       25
<PAGE>

                      (iv)   Adjustments  to  Conversion   Ratio  for  Stock  
Dividends and for  Combinations  or  Subdivisions  of Common Stock.  In the
event that this  Corporation at any time or from time to time after the purchase
date of the Series C Preferred shall declare or pay, without consideration,  any
dividend on the Common Stock  payable in Common Stock or in any right to acquire
Common  Stock  for no  consideration,  or  shall  effect  a  subdivision  of the
outstanding  shares of Common  Stock  into a greater  number of shares of Common
Stock (by stock  split,  reclassification  or  otherwise  than by  payment  of a
dividend in Common  Stock or in any right to acquire  Common  Stock),  or in the
event the outstanding  shares of Common Stock shall be combined or consolidated,
by  reclassification  or  otherwise,  into a lesser  number  of shares of Common
Stock,  then the  number  of  shares of Common  Stock  into  which the  Series C
Preferred  Stock  can or  shall be  converted,  to the  extent  such  number  is
determined   under  either   Section   8(b)(i)(A)  or   8(b)(ii)(A),   shall  be
proportionately  decreased or increased, as appropriate.  In the event that this
Corporation  shall declare or pay,  without  consideration,  any dividend on the
Common Stock payable in any right to acquire  Common Stock for no  consideration
then the Corporation  shall be deemed to have made a dividend  payable in Common
Stock in an amount of shares equal to the maximum number of shares issuable upon
exercise  of  such  rights  to  acquire  Common  Stock.
   
                     (v)   Adjustments for Reclassification and  Reorganization.
If the Common  Stock  issuable  upon  conversion  of the Series C Preferred
Stock  shall be  changed  into the same or a  different  number of shares of any
other   class  or   classes  of  stock,   whether  by  capital   reorganization,
reclassification or otherwise (other than a subdivision or combination of shares
provided  for in  Section  8(b)(ii)  above or a merger  or other  reorganization
referred to in Section 4(f) above),  the number of shares of such other class or
classes of stock into which the Series C Preferred  Stock  shall be  convertible
shall,   concurrently   with  the   effectiveness  of  such   reorganization  or
reclassification,  be  proportionately  adjusted  so that the Series C Preferred
Stock shall be convertible into, in lieu of the number of shares of Common Stock
which the holders would  otherwise  have been  entitled to receive,  a number of
shares of such  other  class or  classes  of stock  equivalent  to the number of
shares of Common  Stock that would have been  subject to receipt by the  holders
upon conversion of the Series C Preferred Stock immediately  before that change.

                     (vi) No Impairment. This Corporation will not, by amendment
of  its  Certificate  or  through  any  reorganization,   recapitalization,
transfer  of  assets,  consolidation,  merger,  dissolution,  issue  or  sale of
securities or any other voluntary action,  avoid or seek to avoid the observance
or performance of any of the terms to be observed or performed hereunder by this
Corporation,  but will at all times in good faith  assist in the carrying out of
all the  provisions of this Section 8(b) and in the taking of all such action as
may be necessary or appropriate in order to protect the Conversion Rights of the
holders of the Series C Preferred Stock against impairment.

                     (vii) No  Fractional  Shares and Certificate  as to  
Adjustments.  

                              (A) No fractional  shares shall be issued upon  
conversion of the Series C Preferred Stock, but, in lieu of any fraction of
a share of Common  Stock  which  would  otherwise  be issuable in respect of the
aggregate  number  of  shares  of  Series  C  Preferred  Stock  surrendered  for
conversion at one time by the same holder,  the Corporation shall pay in cash to


                                       26
<PAGE>

such holder at the time of issuance of shares of Common Stock in connection with
such  conversion  an amount  equal to the product of (i) an amount  equal to the
average  closing  price of a share of Common Stock for the 10 Trading Day period
ending three Trading Days prior to the Conversion  Date times (ii) such fraction
of a share of Common Stock.  Whether or not fractional  shares are issuable upon
such conversion shall be determined on the basis of the total number of Series C
Preferred  Stock the holder is at the time  converting into Common Stock and the
number of shares of Common Stock issuable upon such aggregate conversion.

                              (B)  Upon   the    occurrence   of   each
adjustment  or  readjustment  of the number of shares of Common Stock into which
the Series C Preferred  Stock can be converted  pursuant to this  Section  8(b),
this  Corporation,  at its expense,  shall promptly  compute such  adjustment or
readjustment  in accordance  with the terms hereof and, upon the written request
at any time of any holder of Series C  Preferred  Stock,  prepare and furnish to
such holder of Series C Preferred  Stock a  certificate  setting  forth (A) such
adjustment  or  readjustment  and  showing  in detail  the facts upon which such
adjustment or  readjustment  is based,  (B) the conversion  ratio at the time in
effect,  and (C) the number of shares of Common Stock and the amount, if any, of
other  property  which at the time would be received upon the  conversion of the
Series C Preferred Stock.

                     (viii) Notices of Record Date. In the event of any taking 
by this  Corporation  of a record of the holders of any class of securities
for the purpose of determining  the holders  thereof who are entitled to receive
any dividend  (other than a cash dividend) or other  distribution,  any right to
subscribe for, purchase or otherwise acquire any shares of stock of any class or
any  other  securities  or  property,  or  to  receive  any  other  right,  this
Corporation  shall mail to each  holder of Series C  Preferred  Stock,  at least
twenty (20) days prior to the date specified  therein,  a notice  specifying the
date on which any such record is to be taken for the  purpose of such  dividend,
distribution  or  right,   and  the  amount  and  character  of  such  dividend,
distribution or right.

                    (ix)  Reservation of Stock Issuable Upon Conversion.  This 
Corporation  shall  at all  times  reserve  and keep  available  out of its
authorized  but  unissued  shares of Common  Stock solely for the purpose of (i)
effecting the  conversion of the Series C Preferred  Stock and (ii) of effecting
the issuance of any shares of Common  Stock  issuable  upon any  stock-for-stock
dividend  declared on the Series C Preferred Stock, such number of its shares of
Common  Stock  as  shall  from  time to time be  sufficient  to (a)  effect  the
conversion of all outstanding  shares of the Series C Preferred Stock and (b) to
effect  the  issuance  of  any  shares  of  Common  Stock   issuable   upon  any
stock-for-stock dividend declared on the Series C Preferred Stock; and if at any
time the number of authorized  but unissued  shares of Common Stock shall not be
sufficient  to (x) effect the  conversion of all the then  outstanding  Series C
Preferred  Stock or (y)  effect  the  issuance  of any  shares of  Common  Stock
issuable upon any  stock-for-stock  dividend  declared on the Series C Preferred
Stock,  then,  in addition to such other  remedies as shall be  available to the
holder  of such  Series C  Preferred  Stock,  this  Corporation  will  take such
corporate action as may, in the opinion of its counsel, be necessary to increase
its authorized  but unissued  shares of Common Stock to such number of shares as
shall be sufficient for such purposes.  




                                       27
<PAGE>

                    (x) Notices.  Any notice  required by the provisions of this
Section 8(b)to be given to the holders of Series C Preferred Stock shall be 
deemed given if deposited in the United States mail, postage prepaid, and 
addressed to each holder of record at his address appearing on the books of this
Corporation.

                c.  Series D Preferred  Stock. The holders of Series D Preferred
Stock shall have conversion rights as follows:

                    (i)  Conversion at the Option of the Holder.

                          (a)  Conversion  Right.  The  holders  of the Series D
Preferred  Stock may  convert at any time all or from time to time any part  of
their  outstanding  shares of Series D  Preferred  Stock  into fully  paid  and
nonassessable  shares of Common Stock and such other  securities and property as
hereinafter  provided.  Commencing  on  the  Issuance  Date,  and  at  any  time
thereafter,  each  share of Series D  Preferred  Stock may be  converted  at the
office of the  Corporation or at such additional  office or offices,  if any, as
the  Board of  Directors  may  designate,  into such  number  of fully  paid and
nonassessable  shares of Common Stock  (calculated as to each  conversion to the
nearest  1/100th of a share)  determined  by dividing  (x) the sum of (i) $1,000
plus (ii) an amount  equal to the accrued but unpaid  dividends  on the share of
Series D Preferred Stock being converted and any Arrearage Interest on dividends
thereon in arrears to the applicable  Series D Conversion Date by (y) the Series
D  Conversion  Price on the  applicable  Series  D  Conversion  Date;  provided,
however, that in no event shall any holder of shares of Series D Preferred Stock
be entitled to convert any shares of Series D Preferred  Stock in excess of that
number of shares of Series D Preferred Stock upon conversion of which the sum of
(1) the  number  of shares of Common  Stock  beneficially  owned by such  holder
(including shares of Common Stock  beneficially  owned by all Aggregated Persons
of such holder) (other than shares of Common Stock deemed  beneficially owned by
such holder or any Aggregated Person of such holder through the ownership of (x)
unconverted  shares  of Series D  Preferred  Stock  and (y) the  unconverted  or
unexercised  portion of any  instrument  which contains  limitations  similar to
those set forth in this  sentence)  and (2) the number of shares of Common Stock
issuable upon the conversion of the number of shares of Series D Preferred Stock
with respect to which the  determination  in this  proviso is being made,  would
result in beneficial ownership by such holder and all Aggregated Persons of such
holder of more than 4.9% of the outstanding shares of Common Stock.

                               (b)  Certain  Limitations  on Conversion Rights.
Notwithstanding   any  other   provision   of   this   Amended  and   Restated
Certificate of Incorporation, in no event shall any holder of shares of Series D
Preferred  Stock be entitled on any date to convert a number of shares of Series
D Preferred Stock in excess of that number of shares of Series D Preferred Stock
upon  conversion of which such holder and any  Aggregated  Person of such holder
would have acquired, through conversion of shares of Series D Preferred Stock or
otherwise,  a number  of shares  of  Common  Stock in  excess  of the  Converted
Restriction  Amount during the 30-day period ending on and including the date of
the  determination  being made pursuant to this Section  8(c)(i)(b)  (other than
shares  of  Common  Stock  deemed  beneficially  owned  by  such  holder  or any
Aggregated Person of such holder through the ownership of (x) unconverted shares
of Series D Preferred  Stock and (y) the  unconverted or unexercised  portion of
any  instrument  which contains  limitations  similar to those set forth in this
sentence).




                                       28
<PAGE>

                              (c)  Beneficial  Ownership.  For  purposes  of the
proviso to the second sentence of Section  8(c)(i)(b)and for purposes of Section
8(c)(i)(b),  (x)  beneficial  ownership  shall be determined in accordance  with
Section  13(d)  of the 1934  Act and  Regulation  13D-G  thereunder,  except  as
otherwise  provided  in clause  (1) of the  proviso to the  second  sentence  of
Section  8(c)(i)(b) or as provided in Section 8(c)(i)(b) and (y) the Corporation
shall be  entitled to rely,  and shall be fully  protected  in  relying,  on any
statement  or  representation  made by a holder of shares of Series D  Preferred
Stock to the Corporation in connection with a particular conversion, without any
obligation on the part of the  Corporation to make any inquiry or  investigation
or to examine its records or the  records of any  transfer  agent for the Common
Stock and without any liability of the Corporation with respect thereto.
                        
                         (ii) Other Provisions.

                              (a) The  holders of shares of  Series D  Preferred
Stock at the close of  business on the record  date for any  dividend payment to
holders of Series D Preferred  Stock  shall be entitled to receive the  dividend
payable   on  such   shares  on  the   corresponding   dividend   payment   date
notwithstanding  the conversion  thereof after the record date for such dividend
payment date or the Corporation's default in payment of the dividend due on such
dividend payment date; provided,  however, that the holder of shares of Series D
Preferred Stock converted during the period between the close of business on any
record  date  for a  dividend  payment  and  the  opening  of  business  on  the
corresponding  dividend  payment date must pay to the  Corporation,  within five
days after  receipt by such holder,  an amount equal to the dividend  payable on
such  shares  on such  dividend  payment  date if such  dividend  is paid by the
Corporation to such holder.  A holder of shares of Series D Preferred Stock on a
record date for a dividend  payment who (or whose  transferee)  converts  any of
such shares into shares of Common Stock on or after such  dividend  payment date
will receive the dividend  payable by the Corporation on such shares of Series D
Preferred  Stock on such dividend  payment date, and the converting  holder need
not make any  payment of the amount of such  dividend  in  connection  with such
conversion of shares of Series D Preferred  Stock.  Except as provided above, no
adjustment  shall be made in respect of cash dividends on Common Stock or Series
D Preferred  Stock that may be accrued and unpaid at the date of  conversion  of
shares of Series D Preferred Stock.

                              (b) The right of the holders of Series D Preferred
Stock to convert their shares shall be exercised by delivering(which may be made
by telephone line facsimile transmission, which shall be conclusively deemed for
all purposes of this Amended and Restated  Certificate of  Incorporation to have
been  given  on the date  sent if the  sender  shall  have  received  electronic
confirmation  of the receipt by the Series D Conversion  Agent of such facsimile
transmission) to the Series D Conversion  Agent a Series D Conversion  Notice at
the address or telephone line facsimile  number provided in the form of Series D
Conversion Notice set forth in Section 14(a) (or such other address or facsimile
number of the Series D Conversion  Agent as shall be provided by the Corporation
by notice to the holders of the shares of Series D Preferred Stock), with a copy
to the Corporation at its address or telephone line facsimile number provided in
or  pursuant  to Section  12;  provided,  however,  that any failure or delay in
giving a copy of a Series D  Conversion  Notice  to the  Corporation  shall  not
affect the validity of or Series D Conversion  Date for such Series D Conversion
Notice.  The number of shares of Common Stock to be issued upon each  conversion
of shares of  Series D  Preferred  Stock  shall be the  number  set forth in the
applicable Series D Conversion  Notice,  which number shall be conclusive absent



                                       29
<PAGE>

manifest error.  The Corporation  shall notify a holder who has given a Series D
Conversion Notice of any claim of manifest error within three Trading Days after
such holder  gives such Series D Conversion  Notice,  and no such claim of error
shall limit or delay performance of the  Corporation's  obligation to issue upon
such conversion the number of shares of Common Stock which are not in dispute. A
Series D Conversion Notice shall be deemed for all purposes to be in proper form
unless the  Corporation  notifies a holder of shares of Series D Preferred Stock
being converted within three Trading Days after a Series D Conversion Notice has
been given (which  notice shall  specify all defects in such Series D Conversion
Notice),  and any Series D Conversion  Notice  containing  any such defect shall
nonetheless  be effective on the date given if the  converting  holder agrees to
correct all such defects promptly.

                              (c) If a holder of Series D Preferred Stock elects
to convert any shares of Series D Preferred  Stock in accordance  with  Section
8(c)(i),  such  holder  shall not be required to  surrender  the  certificate(s)
representing  such  shares  of  Series  D  Preferred  Stock  physically  to  the
Corporation  unless all of the shares of Series D  Preferred  Stock  represented
thereby are so converted.  Each holder of shares of Series D Preferred Stock and
the Corporation shall maintain records showing the number of shares so converted
and the dates of such  conversions or shall use such other method,  satisfactory
to such holder and the Corporation,  so as to not require physical  surrender of
such  certificates  upon each such  conversion.  In the event of any  dispute or
discrepancy,   such  records  of  the  Corporation   shall  be  controlling  and
determinative in the absence of manifest error.  Notwithstanding  the foregoing,
if any shares of Series D Preferred Stock evidenced by a particular  certificate
therefor are converted as aforesaid,  the holder of Series D Preferred Stock may
not transfer the  certificate(s)  representing such shares of Series D Preferred
Stock unless such holder first physically  surrenders such certificate(s) to the
Corporation, whereupon the Corporation will forthwith issue and deliver upon the
order of such holder of shares of Series D Preferred Stock new certificate(s) of
like tenor,  registered  as such  holder of shares of Series D  Preferred  Stock
(upon  payment  by such  holder of shares  of  Series D  Preferred  Stock of any
applicable  transfer  taxes) may  request,  representing  in the  aggregate  the
remaining  number  of shares of Series D  Preferred  Stock  represented  by such
certificate(s). Each holder of shares of Series D Preferred Stock, by acceptance
of a certificate for such shares,  acknowledges and agrees that (1) by reason of
the provisions of this paragraph, following conversion of any shares of Series D
Preferred Stock represented by such certificate,  the number of shares of Series
D Preferred Stock represented by such certificate may be less than the number of
shares stated on such  certificate and (2) the Corporation may place one or more
legends on the  certificates for shares of Series D Preferred Stock which refers
to or describes the provisions of this paragraph.  The Corporation may by notice
to any  holder of shares of Series D  Preferred  Stock  require  such  holder to
surrender  the  certificate(s)  for such  holder's  shares of Series D Preferred
Stock  in  exchange  for  issuance  by  the  Corporation  of  one  or  more  new
certificates  for the  number  of  shares  evidenced  by the  certificate(s)  so
surrendered.

                              (d) The  Corporation  shall pay any transfer tax  
arising in connection  with any conversion of shares of Series D Preferred stock
except that the Corporation shall not, however, be required to pay any tax which
may be payable in respect of any  transfer  involved  in the issue and  delivery
upon  conversion of shares of Common Stock or other  securities or property in a
name other than that of the holder of the shares of the Series D Preferred Stock
being converted,  and the Corporation  shall not be required to issue or deliver
any such shares or other  securities or property  unless and until the Person or



                                       30
<PAGE>

Persons  requesting the issuance  thereof shall have paid to the Corporation the
amount of any such tax or shall  have  established  to the  satisfaction  of the
Corporation  that  such tax has  been  paid.  A holder  of  shares  of  Series D
Preferred  Stock who converts such shares shall be responsible for the amount of
any withholding tax payable in connection with such conversion.

                              (e) (1) The Corporation shall duly  reserve and at
all times prior to the Stockholder Approval will continue  to reserve 6,285,000
shares of its authorized and unissued Common Stock, free from preemptive rights,
for issuance upon  conversion of the shares of Series D Preferred Stock (subject
to reduction from time to time for shares of Common Stock issued upon conversion
of  shares  of  Series  D  Preferred  Stock).  From  and  after  the date of the
Stockholder  Approval,  the Corporation will duly reserve,  free from preemptive
rights, for issuance upon conversion of the shares of Series D Preferred Stock a
number of shares of its  authorized and issued Common Stock equal to 175% of the
number of shares of Common  Stock which would be issuable on  conversion  of all
authorized  shares of Series D Preferred  Stock on the  Issuance  Date if all of
such  shares  of  Series  D  Preferred  Stock  were  outstanding  on  such  date
(determined without regard to the limitations on conversion continued in Section
8(c)(i),  subject  to  reduction  from time to time for  shares of Common  Stock
issued upon  conversion of shares of Series D Preferred  Stock.  The Corporation
(and any successor corporation) shall take all action necessary so that a number
of shares of the  authorized  but unissued  Common Stock (or common stock in the
case of any successor corporation) equal to the number of shares of Common Stock
(or such common stock)  issuable upon conversion of the Series D Preferred Stock
outstanding, determined without regard to any limitation on beneficial ownership
contained in Section  8(c)(i),  are at all times reserved by the Corporation (or
any successor  corporation),  free from preemptive  rights, for such conversion,
subject to the provisions of the next succeeding  paragraph.  If the Corporation
shall issue any  securities  or make any change in its capital  structure  which
would  change the number of shares of Common  Stock into which each share of the
Series  D  Preferred  Stock  shall  be  convertible  as  herein  provided,   the
Corporation shall at the same time also make proper provision so that thereafter
there shall be a  sufficient  number of shares of Common  Stock  authorized  and
reserved,  free from preemptive rights, for conversion of the outstanding Series
D Preferred  Stock on the new basis. If at any time the number of authorized but
unissued  shares of Common Stock shall be insufficient to permit the Corporation
to reserve such number of shares of Common Stock, the Corporation promptly shall
seek such corporate  action as may, in the opinion of its counsel,  be necessary
to increase its authorized but unissued shares of Common Stock to such number of
shares as shall be sufficient to meet such requirement.

                                        (2)  The  Initial   Reserve   Amount
shall be allocated  among the shares of Series D Preferred  Stock at the time of
initial issuance thereof pro rata based on the total number of authorized shares
of Series D Preferred  Stock provided in Article  IV(B).  Each  certificate  for
shares of Series D Preferred Stock initially  issued shall bear a notation as to
the number of shares  constituting  the  portion of the Initial  Reserve  Amount
allocated  to the  shares  of  Series  D  Preferred  Stock  represented  by such
certificate  for  purposes  of  conversion   thereof.   Upon  surrender  of  any
certificate   for  shares  of  Series  D   Preferred   Stock  for   transfer  or
re-registration  thereof  (or, at the option of the holder of such  certificate,
for  conversion  pursuant  to Section  8(c)(i) of less than all of the shares of
Series D Preferred Stock  represented  thereby),  the  Corporation  shall make a
notation on the new certificate  issued upon such transfer or re-registration or
evidencing  such  unconverted  shares,  as the case may be, as to the  number of



                                       31
<PAGE>

shares of Common Stock from the Initial Reserve Amount  remaining  available for
conversion  of the  shares of Series D  Preferred  Stock  evidenced  by such new
certificate.  If any  certificate  for  shares  of Series D  Preferred  Stock is
surrendered for division into two or more certificates representing an aggregate
number of shares of Series D  Preferred  Stock  equal to the number of shares of
Series D Preferred  Stock  represented by the  certificate  so  surrendered  (as
reduced by any contemporaneous  conversion of shares of Series D Preferred Stock
represented by the certificate so surrendered),  each certificate issued on such
division  shall bear a notation  of the portion of the  Initial  Reserve  Amount
allocated thereto  determined by pro rata allocation of the remaining portion of
the Initial Reserve Amount  allocated to the certificate so surrendered.  If any
shares of Series D  Preferred  Stock  represented  by a single  certificate  are
converted in full pursuant to Sections  8(c),  all of the portion of the Initial
Reserve  Amount  allocated  to such  shares of Series D  Preferred  Stock  which
remains  unissued after such conversion  shall be  re-allocated  pro rata to the
outstanding  shares of Series D Preferred  Stock held of record by the holder of
record at the close of business on the date of such  conversion of the shares of
Series D Preferred Stock so converted,  and if there shall be no other shares of
Series D Preferred  Stock held of record by such holder at the close of business
on such date, then such portion of the Initial Reserve Amount shall be allocated
pro rata among the shares of Series D Preferred  Stock  outstanding at the close
of business on such date.  The provisions of this Section  8(c)(ii)(E)  shall be
inapplicable after the Stockholder  Approval is obtained.  If shares of Series D
Preferred  Stock are not issued to  MMC/GATX  in  accordance  with this  Article
IV(B),  the shares from the Initial  Reserve  Amount  which were  available  for
allocation to such shares of Series D Preferred  Stock shall be allocated to the
issued shares of Series D Preferred  Stock pro rata based on the amounts thereof
initially issued.

                              (f) (1) In case of any  consolidation or merger of
the  Corporation  with  any  other   corporation   (other  than  a  wholly-owned
subsidiary of the  Corporation)  in which the  Corporation  is not the surviving
corporation,  or in case of any sale or transfer of all or substantially  all of
the assets of the Corporation,  or in the case of any share exchange pursuant to
which all of the  outstanding  shares of Common Stock are  converted  into other
securities or property,  the  Corporation  shall make  appropriate  provision or
cause appropriate provision to be made so that each holder of shares of Series D
Preferred Stock then outstanding shall have the right thereafter to convert such
shares of Series D  Preferred  Stock  into the kind of shares of stock and other
securities  and  property  receivable  upon such  consolidation,  merger,  sale,
transfer,  or share  exchange  by a holder of shares of Common  Stock into which
such shares of Series D Preferred  Stock could have been  converted  immediately
prior to the effective date of such consolidation,  merger, sale,  transfer,  or
share  exchange  and on a basis which  preserves  the  economic  benefits of the
conversion  rights of the  holders  of shares of Series D  Preferred  Stock on a
basis as nearly as practical as such rights exist hereunder  prior thereto.  If,
in connection with any such  consolidation,  merger,  sale,  transfer,  or share
exchange,  each holder of shares of Common Stock is entitled to elect to receive
securities,  cash,  or other assets upon  completion  of such  transaction,  the
Corporation  shall  provide or cause to be  provided  to each holder of Series D
Preferred  Stock the right to elect prior to the completion of such  transaction
the  securities,  cash, or other assets into which the Series D Preferred  Stock
held  by  such  holder  shall  be  convertible  after  completion  of  any  such
transaction on the same terms and subject to the same  conditions  applicable to
holders of the Common Stock (including,  without limitation, notice of the right
to elect,  limitations  on the period in which such election  shall be made, and
the effect of failing to exercise the election).  Notwithstanding  the forgoing,



                                       32
<PAGE>

in connection with any such merger,  consolidation,  sale, transfer or exchange,
the  Corporation  shall  have  the  right,  in  lieu  of  making  provision  for
preservation  of economic  benefits of the  conversion  rights of the holders of
shares of Series D Preferred Stock, to redeem all outstanding shares of Series D
Preferred Stock immediately after completion of such transaction at a redemption
price  per  share of  Series D  Preferred  Stock in cash  equal to the  Business
Combination  Redemption  Price.  Such right of redemption  shall be exercised by
notice from the Corporation to the holders of shares of Series D Preferred Stock
stating that the  Corporation  is  exercising  its  redemption  right under this
Section  8(c)(ii)(f),  which notice shall be given at least 20 days and not more
than 30 days prior to completion of such transaction and shall specify that such
redemption  shall occur on the Business Day  immediately  following  the date of
completion of such  transaction.  On the date  specified in such notice (or such
later date as a holder of shares of Series D  Preferred  Stock  surrenders  such
holder's  certificates  for shares of Series D  Preferred  Stock  redeemed)  the
Corporation shall make payment in immediately  available funds of the applicable
Business  Combination  Redemption  Price to each  holder  of  shares of Series D
Preferred  Stock to be redeemed to such  account as  specified by such holder in
writing to the  Corporation  at least one  Business Day prior to such payment of
the  Business  Combination  Redemption  Price.  A holder  of  shares of Series D
Preferred Stock which are redeemed  pursuant to this Section  8(c)(ii)(f)  shall
not be entitled to payment of the Business Combination  Redemption Price of such
shares of Series D Preferred Stock until such holder shall have  surrendered the
certificate(s)  for such shares of Series D Preferred  Stock to the  Corporation
or, in the case of the loss, theft or destruction of any such certificate, given
indemnity in accordance  with Section 14. If the  Corporation  shall fail to pay
the Business  Combination  Redemption  Price of any shares of Series D Preferred
Stock in full when due,  then the  amount  thereof  shall bear  interest  to the
extent not  prohibited by  applicable  law at the rate of 12% per annum from the
due date thereof until paid in full.  Notwithstanding  the giving of a notice of
redemption pursuant to this Section 8(c)(ii)(f), each holder of shares of Series
D Preferred  Stock shall be entitled to convert in accordance  with this Section
8(c)(ii)(f)  any shares of Series D Preferred  Stock which are to be redeemed at
any time prior to (1) the redemption  date specified in the notice of redemption
or (2) if the Corporation fails to pay the Business Combination Redemption Price
in full to such  holder  when due,  the date on which the  Corporation  pays the
Business  Combination  Redemption Price in full to such holder for all shares of
Series D Preferred Stock to be redeemed from such holder.  The Corporation shall
not  effect  any  such  transaction  unless  it  shall  have  complied  with the
provisions of this  paragraph.  The above  provisions  shall  similarly apply to
successive consolidations, mergers, sales, transfers, or share exchanges.
                         
                                         (2)  Whenever   the  Corporation  shall
propose to take any of the actions specified in this Section 8(c)(ii)(f)(2), the
Corporation  shall  cause a notice to be  mailed,  at least 20 days prior to the
date on which the books of the  Corporation  will close or on which the security
holders entitled to participate in such  transaction will be determined,  to the
holders of record of the  outstanding  Series D  Preferred  Stock on the date of
such notice.  Such notice shall  specify the action  proposed to be taken by the
Corporation and the date as of which holders of record of the Common Stock shall
participate  in any such  actions or be entitled to exchange  their Common Stock
for securities or other property, as the case may be.

                                   (g) Upon receipt by the Series D  Conversion 
Agent from a  holder  of  shares  of  Series  D Preferred  Stock  of a  Series D
Conversion Notice, the Corporation shall issue and deliver or cause to be issued
and  delivered to or upon the order of such holder  certificates  for the Common



                                       33
<PAGE>

Stock  issuable  upon  such  conversion  by the close of  business  on the third
Trading Day after such Series D  Conversion  Notice is  received,  and as of the
close of business  on the date of such  receipt  such  holder (or such  holder's
assignee)  shall be deemed  to be the  holder  of  record  of the  Common  Stock
issuable  upon such  conversion,  and all rights  with  respect to the shares of
Series D Preferred Stock so converted shall forthwith terminate except the right
to receive the Common  Stock or other  securities,  cash,  or other  assets,  as
herein  provided,  on such  conversion.  If a holder of Series D Preferred Stock
shall have given a Series D Conversion  Notice in  accordance  with the terms of
this  Amended and  Restated  Certificate  of  Incorporation,  the  Corporation's
obligation to issue and deliver the  certificates for Common Stock issuable upon
such conversion shall be absolute and unconditional,  irrespective of any action
or inaction by the converting  holder to enforce the same, any waiver or consent
with respect to any provision thereof,  the recovery of any judgment against any
Person  or any  action  to  enforce  the  same,  any  failure  or  delay  in the
enforcement of any other  obligation of the Corporation to the holder of record,
or any setoff,  counterclaim,  recoupment,  limitation  or  termination,  or any
breach or alleged  breach by the holder or any other Person of any obligation to
the Corporation,  or any violation or alleged violation of law by such holder or
any other  Person,  and  irrespective  of any  other  circumstance  which  might
otherwise  limit such obligation of the Corporation to such holder in connection
with such  conversion;  provided,  however,  that nothing  herein shall limit or
prejudice  the right of the  Corporation  to pursue  any such claim in any other
manner permitted by applicable law.

           The occurrence of an event which requires an equitable  adjustment of
the Trading Price as contemplated  by the definition  thereof in Section 1 shall
in no way  restrict  or delay  the  right of any  holder  of  shares of Series D
Preferred  Stock to receive shares of Common Stock upon  conversion of shares of
Series D Preferred  Stock,  and the  Corporation  shall use its best  efforts to
implement each such  adjustment on terms  reasonably  acceptable to the Majority
Holders within two Trading Days after such occurrence.

           If the Corporation  fails to issue and deliver the  certificates  for
the Common Stock to the holder  converting shares of Series D Preferred Stock as
and when required to do so, in addition to any other liabilities the Corporation
may have  hereunder and under  applicable law (1) the  Corporation  shall pay or
reimburse  such  holder on demand  for all  out-of-pocket  expenses,  including,
without limitation,  reasonable fees and expenses of legal counsel,  incurred by
such  holder as a result of such  failure,  (2) the  Series D  Conversion  Price
applicable  to such  conversion  shall be reduced by  one-tenth  of a percentage
point from the Series D Conversion Price otherwise applicable to such conversion
for each  Trading  Day  during  the  period  from the date the  Corporation  was
required to deliver such shares of Common Stock to the date the  Corporation  so
delivers such shares of Common Stock; provided,  however, that in no event shall
any such reduction be made for any Trading Day in such period which is after the
date which is 120 days after the date the  Corporation  was  required to deliver
such shares of Common Stock in  connection  with such  conversion,  and (3) such
holder may by written  notice or oral  notice  (promptly  confirmed  in writing)
given at any time prior to delivery to such holder of the  certificates  for the
shares of Common  Stock  issuable  upon  such  conversion  of shares of Series D
Preferred Stock,  rescind such conversion,  whereupon such holder shall have the
right  to  convert  such  shares  of  Series D  Preferred  Stock  thereafter  in
accordance herewith; provided, however, that the Corporation shall not be liable
to any holder of shares of Series D Preferred  Stock under the preceding  clause
(1) or clause (2) to the extent the failure of the  Corporation to deliver or to
cause to be  delivered  such shares of Common Stock  results  from fire,  flood,
storm, earthquake,  shipwreck,  strike, war, acts of terrorism,  crash involving
facilities  of a common  carrier,  acts of God, or any similar event outside the
control of the  Corporation  (it being  understood that the action or failure to
act of the Series D  Conversion  Agent shall not be deemed an event  outside the
control of the  Corporation  except to the extent  resulting  from fire,  flood,



                                       34
<PAGE>

storm, earthquake,  shipwreck,  strike, war, acts of terrorism,  crash involving
facilities of a common  carrier,  acts of God, the  bankruptcy,  liquidation  or
reorganization of the Series D Conversion Agent under any bankruptcy, insolvency
or other  similar law or any similar  event  outside the control of the Series D
Conversion  Agent). A holder of shares of Series D Preferred Stock who has given
a Series D  Conversion  Notice shall  notify the  Corporation  in writing (or by
telephone  conversation,  confirmed in writing) as promptly as practicable after
becoming aware that shares of Common Stock issued upon such  conversion have not
been received as provided in this Section 8(c)(vii).

                         (h) No fractional  shares.  No  fractional  shares of
Common Stock shall be issued upon conversion of Series D Preferred Stock but, in
lieu of any  fraction  of a share of Common  Stock and the  related  right which
would  otherwise  be  issuable in respect of the  aggregate  number of shares of
Series D Preferred  Stock  surrendered  for  conversion  at one time by the same
holder, the Corporation shall pay in cash to such holder at the time of issuance
of shares of Common Stock in connection  with such conversion an amount equal to
the  product of (A) the  arithmetic  average  of the Market  Price of a share of
Common  Stock on the three  consecutive  Trading  Days ending on the Trading Day
immediately  preceding the Series D Conversion Date times (B) such fraction of a
share of Common Stock

      9.   Voting Rights.

           Except as  otherwise  required by law or expressly  provided  herein,
each share of Series A Preferred  Stock and Series C Preferred  Stock shall have
voting  rights  and powers  equal to the voting  rights and powers of the Common
Stock  (except as  otherwise  expressly  provided  herein or as required by law,
voting  together  with the Common Stock as a single class) and shall be entitled
to notice of any  stockholders'  meeting  in  accordance  with the Bylaws of the
Corporation.   Fractional  votes  shall  not,  however,  be  permitted  and  any
fractional voting rights resulting from the above formula (after aggregating all
shares into which shares of Series A Preferred  Stock,  Series C Preferred Stock
and Series D Preferred  Stock held by each holder could be  converted)  shall be
rounded to the nearest whole number (with one-half being rounded upward).

           Each holder of shares of Series A  Preferred  Stock shall be entitled
to the number of votes equal to the number of shares of Common  Stock into which
such shares of Series A Preferred Stock could then be converted.  Each holder of
shares of Series C Preferred  Stock shall be entitled  (i) during the first year
after  the  issuance  thereof  to six  votes  for each one  share  held and (ii)
thereafter,  to one vote for each share of Common Stock into which such share of
Series C Preferred  Stock is convertible on the record date for the matter to be
voted upon.  Each holder of Common  Stock shall be entitled to one vote for each
share of Common Stock held.

           Except as  otherwise  required by law or expressly  provided  herein,
shares of Series D Preferred Stock shall not be entitled to vote on any matter.



                                       35
<PAGE>


               a.  Series D Voting Rights and Restrictions.

                    (1) Certificate of  Incorporation; Certain Stock. The affir-
mative vote or written consent of the Majority  Holders, voting  separately as a
class, will be required for (i) any amendment, alteration, or repeal, whether by
merger or  consolidation  or  otherwise,  of the  Corporation's  Certificate  of
Incorporation if the amendment,  alteration,  or repeal materially and adversely
affects the rights,  preferences or privileges of the Series D Preferred  Stock,
or (ii) the  creation  or  issuance  of any  Senior  Dividend  Stock  or  Senior
Liquidation  Stock;  provided,  however,  that any  increase  in the  authorized
Preferred  Stock of the  Corporation  or the  creation and issuance of any stock
which is both Junior Dividend and Junior  Liquidation  Stock shall not be deemed
to affect  materially and adversely  such rights,  preferences or privileges and
any such  increase or creation and issuance may be made without any such vote by
the holders of Series D Preferred Stock except as otherwise required by law; and
provided further,  however,  that no such amendment,  alteration or repeal shall
(A) reduce the Optional Redemption Price, Redemption Price or the amount payable
to a holder of shares of Series D Preferred Stock pursuant to Section 3(c)(iii),
(B) reduce the  percentage  in, or otherwise  change the  definition of Majority
Holders, (C) change the method of calculating the Series D Conversion Price in a
manner  adverse to the holders of shares of Series D  Preferred  Stock or reduce
the number of shares of Common Stock  issuable upon any  conversion of shares of
Series D Preferred  Stock, or (D) amend,  modify or repeal any provision of this
Section 9(a)(1),  unless in each such case referred to in the preceding  clauses
(A) through (D) such amendment,  modification or repeal has been approved by the
affirmative vote or written consent of the holders of all outstanding  shares of
Series D Preferred Stock, voting separately or as a class.

                      (2)  Repurchases of Series D Preferred  Stock.  The  
Corporation  shall not repurchase or otherwise acquire any shares of Series
D Preferred Stock (other than pursuant to Section 7(c)(i) unless the Corporation
offers to repurchase or otherwise  acquire  simultaneously a pro rata portion of
each holder's  shares of Series D Preferred Stock for cash at the same price per
share.

                      (3)  Other.  So long as any shares of Series D Preferred
Stock are outstanding:

                          (a) Limitation on Indebtedness.  The Corporation will 
not itself,  and will not permit any subsidiary of the  Corporation to, create,
assume,  incur,  in any manner become liable in respect of,  including,  without
limitation,  by reason of any  business  combination  transaction,  or suffer to
exist (all of which are  referred to herein as  "incurring"),  any  Indebtedness
other than Permitted Indebtedness.

                          (b) Payment of  Obligations.  The Corporation will pay
and discharge,  and will cause each  subsidiary of the  Corporation  to pay and
discharge, all their respective material obligations and liabilities, including,
without limitation,  tax liabilities,  except where the same may be contested in
good faith by appropriate proceedings.



                                       36
<PAGE>

                          (c) Maintenance of Property; Insurance.

                              (i) The  Corporation  will  keep,  and will cause 
each subsidiary of the  Corporation  to keep, all material  property  useful and
necessary in its business in good working order and condition, ordinary wear and
tear excepted
     
                              (ii) The Corporation will maintain, and will cause
each subsidiary  of the  Corporation  to maintain,  with  financially  sound and
responsible insurance companies,  insurance in at least such amounts and against
such  risks as are  usually  insured  against in the same  geographic  region by
companies of comparable size that are engaged in the same or a similar business,
subject to customary deductibles.

                         (d) Conduct of Business and Maintenance of Existence.  
The Corporation   will  continue,   and  will  cause  each  subsidiary  of  the
Corporation  to  continue,  to engage in  business of the same  general  type as
conducted by the Corporation and such subsidiaries on December 9, 1998, the date
the  Certificate of Designation  for the Series D Preferred Stock was filed with
the Secretary of State of Delaware,  and will  preserve,  renew and keep in full
force and effect, and will cause each subsidiary of the Corporation to preserve,
renew and keep in full force and effect,  their respective  corporate  existence
and their  respective  material rights,  privileges and franchises  necessary or
desirable in the normal conduct of business.

                          (e) Compliance with Laws. The Corporation will comply,
and will cause each  subsidiary of the  Corporation to comply,  in all material
respects with all applicable laws, ordinances,  rules,  regulations,  decisions,
orders and  requirements  of  governmental  authorities  and courts  (including,
without limitation, environmental laws) except (i) where compliance therewith is
contested in good faith by appropriate  proceedings or (ii) where non-compliance
therewith could not reasonably be expected to have a material  adverse effect on
the business,  condition  (financial  or  otherwise),  operations,  performance,
properties  or  prospects of the  Corporation  and its  subsidiaries  taken as a
whole.

                          (f)  Investment  Company  Act.  The  Corporation will 
not be or  become  an  open-end  investment  trust,  unit  investment  trust or
face-amount  certificate  company that is or is required to be registered  under
Section 8 of the  Investment  Company Act of 1940, as amended,  or any successor
provision.
    
                          (g) Transactions with Affiliates. The Corporation will
not, and will not permit any  subsidiary  of the  Corporation  to,  directly  or
indirectly, pay any funds to or for the account of, make any investment (whether
by acquisition of stock or Indebtedness, by loan, advance, transfer of property,
guarantee  or  other  agreement  to  pay,  purchase  or  service,   directly  or
indirectly,  any  Indebtedness,  or  otherwise)  in,  lease,  sell,  transfer or
otherwise dispose of any assets, tangible or intangible,  to, or participate in,
or effect any  transaction  in connection  with,  any joint  enterprise or other
joint  arrangement  with, any Affiliate of the Corporation,  except, on terms to
the  Corporation  or such  subsidiary no less favorable than terms that could be
obtained  by the  Corporation  or such  subsidiary  from a Person that is not an
Affiliate  of the  Corporation,  as  determined  in good  faith by the  Board of
Directors.

          10. Status of Converted or Redeemed  Stock.  In the event any Series A
Preferred  Stock or Series C  Preferred  Stock shall be  converted   pursuan  to



                                       37
<PAGE>

Section 8(a) or 8(b),  respectively,  hereof,  the shares so converted  shall be
promptlycanceled  after the conversion thereof. All such shares shall upon their
cancellation  become  authorized but unissued  shares of Preferred Stock and may
bereissued  as  part  of a new  series  of  Preferred  Stock  to be  created  by
resolution or resolutions  of the Board of Directors,  subject to the conditions
and restrictions on issuance set forth herein.

          11.  Outstanding  Shares. For purposes of the Certificate of 
Designation for the Series D Convertible  Preferred Stock filed on December 9,
1998,  all shares of Series D  Preferred  Stock  shall be deemed  outstanding
except  (i) from the date a Series D  Conversion  Notice is given by a holder of
Series D Preferred  Stock, all shares of Series D Preferred Stock converted into
Common Stock and (ii) from the date of registration  of transfer,  all shares of
Series D Preferred  Stock held of record by the Corporation or any subsidiary or
Affiliate (as defined herein) of the Corporation (other than any original holder
of shares of Series D Preferred Stock) and (iii) from the applicable  Redemption
Date,  Optional  Redemption  Date or  date of  redemption  pursuant  to  Section
8(c)(ii)(f),  all shares of Series D Preferred Stock which are redeemed, so long
as in each case the  Redemption  Price,  Optional  Redemption  Price or Business
Combination  Redemption  Price,  as the case may be, of such  shares of Series D
Preferred  Stock  shall  have  been  paid by the  Corporation  as and  when  due
hereunder.  

         12. Notices.  Any notices required or permitted to be given under the 
terms of this Certificate of Incorporation shall be in writing and shall be
delivered personally (which shall include telephone line facsimile transmission)
or by courier,  and shall be deemed given upon  receipt,  (a) in the case of the
Corporation,  addressed to the  Corporation at 213 East Grand Avenue,  South San
Francisco,  California 94080,  Attention:  President and Chief Executive Officer
(telephone line facsimile  transmission  number (650)  873-8367),  or (b) in the
case of any  holder  of shares of Series D  Preferred  Stock,  at such  holder's
address or telephone line facsimile transmission number shown on the stock books
maintained by the  Corporation  with respect to the Series D Preferred  Stock or
such other  address as the  Corporation  shall  have  provided  by notice to the
holders of shares of Series D Preferred Stock in accordance with this Section or
any holder of shares of Series D  Preferred  Stock  shall have  provided  to the
Corporation in accordance with this Section.

          13.  Replacement of  Certificates.  Upon receipt by the Corporation of
evidence reasonably satisfactory to the Corporation of the ownership of and the 
loss,  theft,  destruction  or mutilation o f any  certificate  for shares   of
Series C  Preferred  Stock or  Series D  Preferred  Stock and (1) in the case of
loss,  theft  or  destruction,  of  indemnity  from  the  record  holder  of the
certificate  for such shares of Series C  Preferred  Stock or Series D Preferred
Stock  reasonably  satisfactory  in form to the  Corporation  (and  without  the
requirement  to  post  any  bond  or  other  security)  or (2) in  the  case  of
mutilation,  upon surrender and  cancellation of the certificate for such shares
of Series C Preferred Stock or Series D Preferred  Stock,  the Corporation  will
execute and deliver to such holder a new certificate for such shares of Series C
Preferred Stock or Series D Preferred Stock without charge to such holder.


                                       38
<PAGE>



          14.  Forms of Notices.

               a.  Notice of Conversion of Series D Convertible Preferred Stock.


                              NOTICE OF CONVERSION
                                       OF
                      SERIES D CONVERTIBLE PREFERRED STOCK
                                       OF
                          SHAMAN PHARMACEUTICALS, INC.

TO:   BankBoston, N.A.,
   as Conversion Agent
150 Royall Street
Canton, Massachusetts 02021
Attention:  Client Administration
Facsimile No.:  (781) 575-2549

cc:   Shaman Pharmaceuticals, Inc.
213 East Grand Avenue
South San Francisco, California  94080
Attention:  Chief Financial Officer
Facsimile No.: (650) 873-8367

           (1) Pursuant to the terms of the Series D Convertible Preferred Stock
(the "Preferred Stock"), of Shaman Pharmaceuticals, Inc., a Delaware corporation
(the  "Corporation"),  the undersigned  (the "Holder")  hereby elects to convert
_______________  shares of the  Preferred  Stock,  including  accrued and unpaid
dividends per share of $________  and Arrearage  Interest per share of $________
into  shares of Common  Stock,  $0.001 par value (the  "Common  Stock"),  of the
Corporation,  at a Series D  Conversion  Price  per  share  of  Common  Stock of
$________ or such other  securities  into which the Preferred Stock is currently
convertible.  Capitalized  terms used in this Notice and not  otherwise  defined
herein  have the  respective  meanings  provided  in the  Amended  and  Restated
Certificate of Incorporation.

           (2) The number of shares of Common Stock issuable upon the conversion
of  the   shares  of   Preferred   Stock  to  which  this   Notice   relates  is
__________________________.

           (3)  Check  (and  complete,  if  applicable)  one of the
following:

           /__/ (A) Set forth  below or on a  schedule  which  accompanies  this
           Notice  are  the  Trading  Prices  during  the   Measurement   Period
           applicable to this Notice and an indication of the Trading Price used
           to determine the Series D Conversion Price set forth above.





                                       39
<PAGE>




Date                                                  Trading Price

1.    __________________________              $____________________

2.    __________________________              $____________________

3.    __________________________              $____________________

4.    __________________________              $____________________

5.    __________________________              $____________________

6.    __________________________              $____________________

7.    __________________________              $____________________

8.    __________________________              $____________________

9.    __________________________              $____________________

10.   __________________________              $____________________

11.   __________________________              $____________________

12.   __________________________              $____________________


           /__/ (B) The  conversion to which this Notice relates is based on the
           fixed  Series D  Conversion  Price  specified  in  clause  (a) of the
           definition  of such term in the Amended and Restated  Certificate  of
           Incorporation.

           (4)  Please  issue  certificates  for the  number of shares of Common
Stock or other securities into which such number of shares of Preferred Stock is
convertible in the name(s)  specified  immediately below or, if additional space
is necessary, on an attachment hereto:

_________________________________         _________________________________
      Name                                      Name

_________________________________         _________________________________
      Address                                   Address

_________________________________         _________________________________
      SS or Tax ID Number                       SS or Tax ID Number



                                       40
<PAGE>

           (5) The undersigned  hereby  represents to the  Corporation  that the
exercise  of  conversion  rights  contained  in this Notice does not violate the
provisions  of  Section  8(b)  of  this  Amended  and  Restated  Certificate  of
Incorporation  relating to beneficial  ownership in excess of 4.9% of the Common
Stock.

           (6) If the shares of Common Stock  issuable  upon  conversion  of the
Preferred  Stock  have not been  registered  for resale  under the 1933 Act,  as
amended (the "1933 Act") and are not being  offered or sold pursuant to Rule 144
under the 1933 Act (or any  successor or  replacement  rule or  provision),  the
Holder  represents  and  warrants  that (i) the  shares of  Common  Stock not so
registered are being acquired for the account of the Holder for investment,  and
not with a view to, or for resale in connection  with,  the public  distribution
thereof other than pursuant to  registration  under the 1933 Act or an exemption
from  registration  under  the 1933  Act,  and that the  Holder  has no  present
intention  of  distributing  or  reselling  the  shares of  Common  Stock not so
registered  other  than  pursuant  to  registration  under  the  1933  Act or an
exemption  from  registration  under  the 1933 Act and  (ii)  the  Holder  is an
"accredited  investor" as defined in Regulation D under the 1933 Act. The Holder
further  agrees that (A) the shares of Common Stock not so registered  shall not
be sold or transferred  unless (i) they first shall have been  registered  under
the 1933 Act,  (ii) the  Corporation  first  shall have been  furnished  with an
opinion of legal  counsel  reasonably  satisfactory  to the  Corporation  to the
effect that such sale or transfer is exempt from the  registration  requirements
of the 1933 Act or (iii) such  shares are  offered or sold  pursuant to Rule 144
under the 1933 Act (or any successor or replacement rule or provision),  and (B)
until such shares are registered for resale under the 1933 Act, the  Corporation
may place a legend on the  certificate(s)  for the shares of Common Stock not so
registered to that effect and place a  stop-transfer  restriction in its records
relating to the shares of Common Stock not so registered, all in accordance with
the Exchange Agreement by which the Holder is bound.

Date _________________________      ________________________________
                                    Signature of Holder
                                    (Must be signed exactly as name
                                    appears on the Preferred Stock Certificate.)




                                       41
<PAGE>




                b.     Form of Redemption Notice.


                                REDEMPTION NOTICE
              (Section 7(a) of Amended and Restated Certificate of
                                 Incorporation)

TO:   _____________________________
           (Name of Holder)

           (1) Pursuant to the terms of the Series D Convertible Preferred Stock
(the "Preferred Stock"),  Shaman  Pharmaceuticals,  Inc., a Delaware corporation
(the "Corporation"),  hereby notifies the above-named holder (the "Holder") that
the  Corporation  is  exercising  its  right to redeem  _____________  shares of
Preferred  Stock  held by the  Holder in  accordance  with  Section  7(a) of the
Amended and Restated Certificate of Incorporation:

           (2)  The Redemption Date is December 30, 1998.

           (3)  The Redemption  Price per share of Preferred  Stock
is $_________.

           (4) Upon surrender to the Corporation of the  certificate(s)  for the
shares of  Preferred  Stock to be  redeemed  (but in no event  earlier  than the
Redemption Date), the Corporation will make payment of the applicable Redemption
Price in accordance with the Amended and Restated Certificate of Incorporation.

           (5)  Capitalized  terms used herein and not otherwise  defined herein
have the respective meanings provided in the Amended and Restated Certificate of
Incorporation.

                               SHAMAN PHARMACEUTICALS, INC.



                               By _______________________________
                                     Title:




                                       42
<PAGE>




                c.     Form of Corporation Notice.


                               CORPORATION NOTICE
             (Section 7(c)(i) of Amended and Restated Certificate of
                                 Incorporation)

TO:   _____________________________
           (Name of Holder)

           (1)  An  Optional  Redemption  Event  described  in the  Amended  and
Restated  Certificate of Incorporation (the "Amended and Restated Certificate of
Incorporation")  of Series D Convertible  Preferred  Stock, par value $0.001 per
share (the  "Preferred  Stock"),  of Shaman  Pharmaceuticals,  Inc.,  a Delaware
corporation (the "Corporation"), occurred on _____________________,  _______. As
a  result  of such  Optional  Redemption  Event,  the  above-named  holder  (the
"Holder")  is entitled to exercise its optional  redemption  rights  pursuant to
Section 7(c)(ii) of the Amended and Restated Certificate of Incorporation.

           (2)  The  Holder's  optional  redemption  right  must be
exercised on or before
__________________,__________.

           (3) At or before the date set forth in the preceding  paragraph  (2),
the Holder must deliver to the Corporation:

           (a)  a Holder  Notice,  in the form set forth in Section
      14(d)   of  the   Amended   and   Restated   Certificate   of
      Incorporation; and

           (b)  the  certificates for the shares of Preferred Stock
      to  be   redeemed,   duly   endorsed   for  transfer  to  the
      Corporation the shares to be redeemed.

           (4)  Capitalized  terms used herein and not otherwise  defined herein
have the respective meanings provided in the Amended and Restated Certificate of
Incorporation.


Date _________________________            SHAMAN PHARMACEUTICALS, INC.



                                       By__________________________
                                          Title:




                                       43
<PAGE>




                       d. Form of Holder Notice.


                                  HOLDER NOTICE
            (Section 7(c)(ii) of Amended and Restated Certificate of
                                 Incorporation)

TO:   SHAMAN PHARMACEUTICALS, INC.

           (1)  Pursuant  to the  terms of the  Series D  Convertible  Preferred
Stock,  par  value  $0.001  per  share  (the  "Preferred   Stock"),   of  Shaman
Pharmaceuticals,   Inc.,  a  Delaware  corporation  (the   "Corporation"),   the
undersigned  hereby  elects to exercise its right to require  redemption  by the
Corporation  pursuant to Sections 7(c)(ii)(a) and 7(c)(ii)(b) of the Amended and
Restated  Certificate of  Incorporation of  _______________  shares of Preferred
Stock at an  Optional  Redemption  Price per share in cash equal to the  product
obtained by  multiplying  (a) the sum of (i) $1,000 plus (ii) an amount equal to
$___________  for the  accrued  but unpaid  dividends  on each share of Series D
Preferred Stock to be redeemed and any Arrearage  Interest on dividends  thereon
in arrears to the date of redemption times (b) 118% .

           (2) The  aggregate  Optional  Redemption  Price of all shares of  
Preferred Stock to be redeemed from the undersigned is $_____________.

           (3)  Capitalized  terms used herein and not otherwise  defined herein
have the respective meanings provided in the Amended and Restated Certificate of
Incorporation.


Date: _______________________             NAME OF HOLDER:




                                       By____________________________
                                          Signature of Registered Holder
                                          (Must be signed exactly as name
                                          appears on the stock certificate.)




                                       44
<PAGE>




                e.       Form of Control Notice.


                                 CONTROL NOTICE
            (Section 7(c)(iv) of Amended and Restated Certificate of
                                 Incorporation)

TO:   _____________________________
           (Name of Holder)

           (1)  Pursuant  to the  terms of the  Series D  Convertible  Preferred
Stock,   par  value   $0.001  per  share   (the   "Preferred   Stock"),   Shaman
Pharmaceuticals,  Inc.,  a  Delaware  corporation  (the  "Corporation"),  hereby
notifies the  above-named  holder (the  "Holder")  that in  accordance  with the
Amended and Restated  Certificate of Incorporation and by reason of events which
are not solely within the control of the Corporation,  on  _____________(fill in
date) an Optional  Redemption  Event subject to Section  7(c)(ii)(b)(iv)  of the
Amended and Restated Certificate of Incorporation occurred.

           (2)  Attached  to this  Notice  is an  Auditors'  Determination  with
respect to the occurrence referred to in paragraph (1).

           (3)  Capitalized  terms used herein and not otherwise  defined herein
have the respective meanings provided in the Amended and Restated Certificate of
Incorporation.

Date: _________________________        SHAMAN PHARMACEUTICALS, INC.



                                       By________________________________
                                          Title:




                                       45
<PAGE>



                    f.  Form of Adjustment Notice.


                                ADJUSTMENT NOTICE
            (Section 7(c)(iv) of Amended and Restated Certificate of
                                 Incorporation)

VIA FACSIMILE

TO:   ____________________________
           (Name of Holder)

           (1)  Pursuant  to the  terms of the  Series D  Convertible  Preferred
Stock,   par  value   $0.001  per  share   (the   "Preferred   Stock"),   Shaman
Pharmaceuticals,  Inc., a Delaware corporation (the "Corporation"),  confirms to
the  above-named  holder (the  "Holder")  of shares of  Preferred  Stock that on
_______________  (fill in date) the  Corporation  gave the Holder and each other
holder of shares of  Preferred  Stock a Control  Notice in  accordance  with the
Amended and Restated  Certificate of  Incorporation  of the Preferred Stock (the
"Amended and Restated  Certificate of  Incorporation"),  and hereby notifies the
Holder of the adjustments set forth below.

           (2)  Effective on  _________(fill  in date),  the Series D Conversion
Price of the  Preferred  Stock is ____% (fill in  percentage)  of the amount the
Series D  Conversion  Price would  otherwise  be without  regard to  adjustments
pursuant to Section  7(c)(ii)(b)(iv) of the Amended and Restated  Certificate of
Incorporation.

           (3) Effective on _________(fill in date),  cumulative dividends shall
accrue on each outstanding share of Preferred Stock in the amount of $__________
per annum.

           (4) The foregoing  adjustments  to the Series D Conversion  Price and
the cumulative annual dividend amount will continue in effect until a subsequent
Adjustment Notice is given to the Holder.

           (5)  Capitalized  terms used herein and not otherwise  defined herein
have the respective meanings provided in the Amended and Restated Certificate of
Incorporation.


Date _________________________         SHAMAN PHARMACEUTICALS, INC.



                                       By___________________________
                                         Title:




                                       46
<PAGE>




           C.   Common Stock.

                1.  Dividend  Rights.  Subject to the prior rights of holders of
all  classes  of  stock  at the  time  outstanding  having  prior  rights  as to
dividends,  the holders of the Common shall be entitled to receive,  when and as
declared by the Board of Directors, out of any assets of the corporation legally
available  therefor,  such dividends as may be declared from time to time by the
Board of Directors.

                2.   Redemption.  The Common is not redeemable.

                3. Voting Rights.  The holder of each share of Common shall have
the right to one  vote,  and shall be  entitled  to notice of any  stockholders'
meeting  in   accordance   with  this  Amended  and  Restated   Certificate   of
Incorporation and the Bylaws of this corporation,  and shall be entitled to vote
upon such matters and in such manner as may be provided by law.

               4. Residual  Rights.  All rights accruing to the outstanding  
shares of the corporation not expressly provided for to the contrary herein
shall be vested in the Common.


                                    ARTICLE V

           Except as otherwise provided in this Amended and Restated Certificate
of  Incorporation,  in furtherance and not in limitation of the powers conferred
by statute,  the Board of  Directors is expressly  authorized  to make,  repeal,
alter,  amend  and  rescind  from  time to time any or all of the  Bylaws of the
corporation.


                                   ARTICLE VI

           The number of directors of the  corporation  shall be fixed from time
to time by a Bylaw or  amendment  thereof duly adopted by the Board of Directors
or by the stockholders.

           The Board of  Directors  shall be and is  divided  into two  classes,
Class I and  Class  II.  Such  classes  shall be as  nearly  equal in  number of
directors as possible. Each director shall serve for a term ending on the second
annual meeting  following the annual meeting at which such director was elected.
The foregoing  notwithstanding,  each  director  shall serve until his successor
shall have been duly  elected  and  qualified,  unless he shall  resign,  become
disqualified, disabled or shall otherwise be removed. Any director or the entire
Board of Directors may be removed,  with or without  cause,  by the holders of a
majority of the shares entitled to vote at an election of directors.

           At each  annual  election,  directors  chosen to succeed  those whose
terms then  expire  shall be of the same class as the  directors  they  succeed,
unless  by  reason  of any  intervening  changes  in the  authorized  number  of
directors,  the Board shall designate one or more directorships  whose term then
expires  as  directorships  of  another  class in order  more  nearly to achieve
equality of number of directors among the classes.



                                       47
<PAGE>

           Notwithstanding  the rule  that the two  classes  shall be as  nearly
equal in number of  directors  as  possible,  in the event of any  change in the
authorized  number of directors  each director then  continuing to serve as such
shall  nevertheless  continue as a director of the class of which he is a member
until the  expiration of his current term,  or his prior death,  resignation  or
removal. If any newly created directorship may,  consistently with the rule that
the two classes shall be as nearly equal in number of directors as possible,  be
allocated  to one of two  classes,  the Board  shall  allocate it to that of the
available  classes  whose term of office is due to expire at the  earliest  date
following such allocation.

                                   ARTICLE VII

           Elections  of  directors  need not be by  written  ballot  unless the
Bylaws of the corporation shall so provide.

                                  ARTICLE VIII

           Meetings of  stockholders  may be held within or outside of the State
of Delaware, as the Bylaws may provide. The books of the corporation may be kept
(subject  to any  provision  contained  in the  statutes)  outside  the State of
Delaware at such place or places as may be  designated  from time to time by the
Board of Directors or in the Bylaws of the corporation.

                                   ARTICLE IX

           A director of the corporation  shall not be personally  liable to the
corporation  or its  stockholders  for monetary  damages for breach of fiduciary
duty as a director,  except for liability  (i) for any breach of the  director's
duty of  loyalty  to the  corporation  or its  stockholders,  (ii)  for  acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law,  (iii) under Section 174 of the Delaware  General  Corporation
Law, or (iv) for any  transaction  from which the director  derived any improper
personal benefit.  If the Delaware General  Corporation Law is hereafter amended
to  authorize,  with the  approval of the  corporation's  stockholders,  further
reductions  in the  liability  of the  corporation's  directors  for  breach  of
fiduciary duty,  then a director of the corporation  shall not be liable for any
such breach to the fullest extent permitted by the Delaware General  Corporation
Law as so amended.  Any repeal or  modification  of the foregoing  provisions of
this  Article IX by the  stockholders  of the  corporation  shall not  adversely
affect any right or protection of a director of the corporation  existing at the
time of such repeal or modification.

                                    ARTICLE X

           The corporation  reserves the right to amend, alter, change or repeal
any   provision   contained  in  this  Amended  and  Restated   Certificate   of
Incorporation,  in the manner now or hereafter  prescribed  by statute,  and all
rights conferred on stockholders herein are granted subject to this reservation.




                                       48
<PAGE>

           IN  WITNESS  WHEREOF,   this  Amended  and  Restated  Certificate  of
Incorporation  has  been  signed  by the  President  and  the  Secretary  of the
corporation this 11th day of March, 1999.

                                    SHAMAN PHARMACEUTICALS, INC.



                                    By:  /s/ Lisa A. Conte
                                         ------------------------
                                         Lisa A. Conte, President





                                       49
<PAGE>


                                                                 EXHIBIT 23.1


         Consent of Ernst & Young LLP, Independent Auditors

We consent to the reference to our firm under the caption "Experts" and to
the use of our reports dated February 11, 1999 (except Note 10, as to which the
date is June __, 1999), in the Registration Statement (Form S-1) and related
Prospectus of Shaman Pharmaceuticals, Inc. for the registration of 7,500,000
shares of its Series R Convertible Preferred Stock, 7,500,000 rights to purchase
its Series R Preferred Stock, and 50,000,000 shares of its common stock.



Palo Alto, California
- --------------------------------------------------------------------------------

The foregoing consent is in the form that will be signed upon the completion of
the restatement of capital accounts described in Note 10 to the financial
statements.


/s/ Ernst & Young LLP
Palo Alto, California
May 5, 1999





<TABLE> <S> <C>


<ARTICLE>                                              5
<MULTIPLIER>                                       1,000
<CURRENCY>                                  U.S. Dollars
       
<S>                             <C>
<PERIOD-TYPE>                                     12-MOS
<FISCAL-YEAR-END>                            DEC-31-1998
<PERIOD-START>                                JAN-1-1998
<PERIOD-END>                                 DEC-31-1998
<EXCHANGE-RATE>                                     1.00
<CASH>                                             5,887
<SECURITIES>                                       3,277
<RECEIVABLES>                                        209
<ALLOWANCES>                                           0
<INVENTORY>                                            0
<CURRENT-ASSETS>                                   9,657
<PP&E>                                            15,078
<DEPRECIATION>                                   (11,964)
<TOTAL-ASSETS>                                    13,139
<CURRENT-LIABILITIES>                              8,614
<BONDS>                                            2,415
                                  0
                                            0
<COMMON>                                              30
<OTHER-SE>                                         2,080
<TOTAL-LIABILITY-AND-EQUITY>                      13,139
<SALES>                                                0
<TOTAL-REVENUES>                                   2,660
<CGS>                                                  0
<TOTAL-COSTS>                                          0
<OTHER-EXPENSES>                                  37,958
<LOSS-PROVISION>                                       0
<INTEREST-EXPENSE>                                (2,033)
<INCOME-PRETAX>                                  (38,523)
<INCOME-TAX>                                           0
<INCOME-CONTINUING>                              (38,523)
<DISCONTINUED>                                         0
<EXTRAORDINARY>                                        0
<CHANGES>                                              0
<NET-INCOME>                                     (38,523)
<EPS-PRIMARY>                                      (1.92)
<EPS-DILUTED>                                          0
        



</TABLE>


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