SYMBOLLON CORP
10QSB, 1999-11-10
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                    U.S. SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  Form 10-QSB

(Mark One)
|X|      QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
         ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1999
| |      TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ______ TO ________

Commission file number  0-22872
                       ---------

                              SYMBOLLON CORPORATION
- -------------------------------------------------------------------------------
       (Exact name of small business issuer as specified in its charter)

            Delaware                            36-3463683
- -------------------------------            ------------------------
(State or other jurisdiction of              (I.R.S. Employer
incorporation or organization)              Identification No.)

                    37 Loring Drive, Framingham, MA 01702
- -------------------------------------------------------------------------------
                    (Address of principal executive offices)

                                  508-620-7676
- -------------------------------------------------------------------------------
                (Issuer's telephone number, including area code)


- -------------------------------------------------------------------------------
        (Former name, former address and former fiscal year, if changed
                               since last report)

Check  whether the issuer (1) filed all reports  required to be filed by Section
13 or 15(d) of the  Exchange  Act during the past 12 months (or for such shorter
period that the registrant was required to file such reports),  and (2) has been
subject to such filing requirements for the past 90 days. Yes X No

State the number of shares outstanding of each of the issuer's classes of common
equity, as of the latest practicable date.

                                    November 13, 1999
                                    -----------------
        Class A Common Stock            4,334,183
        Class B Common Stock               15,738

Transitional Small Business Disclosure Format (check one):

                    Yes             No    X
                        --------       --------

<PAGE>

                              SYMBOLLON CORPORATION
                          (a development stage company)

                                      INDEX

                                                                          PAGE
PART I.  FINANCIAL INFORMATION

         Item 1.  Financial Statements

             Unaudited Condensed Balance Sheets
             - September 30, 1999 and December 31, 1998                      1

             Unaudited Condensed Statements of Operations
               and Deficit Accumulated During the Development
               Stage - For the nine and three months
               ended September 30, 1999 and September 30, 1998               2

             UnauditedCondensed  Statements  of Cash  Flows - For the  nine
               months ended September 30, 1999
               and September 30, 1998                                        3

             Notes to the Unaudited Condensed Financial Statements           4

         Item 2.  Management's Discussion and Analysis
                  or Plan of Operation                                       5

PART II.  OTHER INFORMATION

         Item 2. Changes in Securities and Use of Proceeds                   8

         Item 5.  Other Information                                          9

         Item 6.  Exhibits and Reports on Form 8-K                           9

SIGNATURE                                                                    9

INDEX TO EXHIBITS                                                            10

<PAGE>

                        Part I - Financial Information

Item 1 - Financial Statements
<TABLE>

                             SYMBOLLON CORPORATION
                         (a development stage company)

                            CONDENSED BALANCE SHEETS
                                   (Unaudited)

                                     ASSETS
<CAPTION>
                                                                          September 30,     December 31,
                                                                              1999              1998
                                                                          -------------     ------------
Current assets:
<S>                                                                        <C>               <C>
  Cash and cash equivalents............................................... $ 2,424,378      $ 1,514,115
  Restricted cash.........................................................     154,563          297,554
  Accounts receivable.....................................................     220,972          207,172
  Inventory...............................................................     148,982           69,382
  Prepaid expenses........................................................      26,348           83,104
                                                                           -----------      -----------
        Total current assets.............................................. $ 2,975,243      $ 2,171,327

Equipment and leasehold improvements, net of
 accumulated depreciation and amortization................................      99,770          125,572
Other assets:
    Patent and trademark cost, net of accumulated amortization............     217,797          205,226
    Deposit...............................................................       2,364            2,364
                                                                          ------------      -----------
        TOTAL............................................................. $ 3,295,174      $ 2,504,489
                                                                          ============      ===========

                                   LIABILITIES
Current liabilities:
  Accounts payable........................................................ $   219,763      $    87,654
  Accrued expenses........................................................     361,903            4,403
  Other current liabilities...............................................       1,450           19,149
                                                                          ------------      -----------
        Total current liabilities.........................................     583,116          111,206

Redeemable common stock, Class A, par value $.001 per share,  93,334 and 669,545
 shares  issued at  September  30,  1999 and  December  31,  1998,  respectively
 (aggregate involuntary
 liquidation value $175,000 and $850,000, respectively)...................     175,000          850,000

                               STOCKHOLDERS' EQUITY

Preferred  stock,  par  value  $.001  per  share,  5,000,000  shares
 authorized, none issued..................................................
Common stock, Class A, par value $.001 per share,
 18,750,000 shares authorized, 3,962,464 and 2,919,786 shares issued at
 September 30, 1999 and December 31, 1998, respectively...................       3,962            2,920
Convertible Common stock, Class B, par value $.001 per share,
 1,250,000 shares authorized, 15,738 shares issued at
 September 30, 1999 and December 31, 1998, respectively...................          16               16
Additional paid-in capital................................................   8,664,844        7,254,712
Deficit accumulated during the development stage..........................  (6,131,764)      (5,714,365)
                                                                          ------------      -----------
     Total stockholders' equity...........................................   2,537,058        1,543,283
                                                                          ------------      -----------

        TOTAL............................................................. $ 3,295,174      $ 2,504,489
                                                                          ============      ===========
</TABLE>

See notes to condensed financial statements.

                                        1




<PAGE>


<TABLE>

                             SYMBOLLON CORPORATION
                          (a development stage company)

           CONDENSED STATEMENTS OF OPERATIONS AND DEFICIT ACCUMULATED
                          DURING THE DEVELOPMENT STAGE
                                  (Unaudited)
<CAPTION>
                                                                                                               Period From
                                                                                                              July 15, 1986
                                                        Three Months Ended            Nine Months Ended      (Inception) to
                                                           September 30,                September 30,         September 30,
                                                         1999         1998           1999          1998           1999
                                                     -----------   -----------    -----------   -----------    -----------
<S>                                                  <C>           <C>            <C>           <C>            <C>
Revenue:
Net product sales.................................   $   122,100   $    59,675    $   294,600   $   170,176    $ 1,335,588
Contract revenue..................................        98,872        19,085        287,751        19,085        932,501
License fee revenue...............................       750,000       400,000        750,000       400,000      2,940,000
                                                     -----------   -----------    -----------   -----------    -----------
        Total revenue.............................       970,972       478,760      1,332,351       589,261      5,208,089

Operating Expenses:
    Cost of goods sold............................   $    64,167   $    36,087    $   204,357   $   109,295    $   799,558
    Research and development costs................       384,885       278,512      1,298,993       812,407      6,580,707
    General and administrative expenses...........        99,722        96,784        295,741       362,033      4,231,007
                                                     -----------   -----------    -----------   -----------    -----------
        Total operating expenses..................       548,774       411,383      1,799,091     1,283,735     11,611,272
                                                     -----------   -----------    -----------   -----------    -----------

Income (Loss) from operations.....................       422,198        67,377       (466,740)     (694,474)    (6,403,183)

Interest income...................................        18,838        20,601         49,341        75,677        627,679

Interest expense and debt issuance costs..........                                                                (356,260)
                                                     -----------   -----------    -----------   -----------    -----------

Net Income (Loss).................................   $   441,036   $    87,978    $  (417,399)  $  (618,797)   $(6,131,764)
                                                                                                               ===========
Basic Net Income (Loss) per share of common stock.   $      0.15   $      0.03    $     (0.14)  $     (0.24)
                                                     ===========   ===========    ===========   ===========

Diluted Net Income (Loss) per share of common stock  $      0.14   $      0.03    $     (0.14)  $     (0.24)
                                                     ===========   ===========    ===========   ===========

Weighted average number of common shares
 outstanding......................................     3,022,127     2,754,429      2,945,511     2,584,874
                                                     ===========   ===========    ===========   ===========

Weighted average number of common shares and
 potential dilutive common shares outstanding.....     3,148,439     2,754,429      2,945,511     2,584,874
                                                     ===========   ===========    ===========   ===========


</TABLE>

See notes to condensed financial statements.

                                       2

<PAGE>


<TABLE>
                             SYMBOLLON CORPORATION
                         (a development stage company)

                       CONDENSED STATEMENTS OF CASH FLOWS
                                  (Unaudited)
<CAPTION>
                                                                                           Period From
                                                                                          July 15, 1986
                                                                 Nine Months Ended       (Inception) to
                                                                   September 30,          September 30,
                                                                1999          1998           1999
                                                             -----------   -----------    -----------
<S>                                                          <C>           <C>            <C>
Cash flows from operating activities:
    Net income (loss).....................................   $  (417,399)  $  (618,797)   $(6,131,764)
    Adjustments  to  reconcile  net income (loss) to net
    cash  provided  by  (used  in) operating activities:
      Depreciation and amortization expense...............        34,383        35,299        462,762
      Amortization of debt issuance costs.................                                    130,000
      Accrued rent........................................
      Loss on disposition of equipment....................                                     19,542
      Changes in:
        Restricted cash...................................       142,991                     (154,563)
        Accounts receivable...............................       (13,800)       (9,726)      (220,972)
        Inventory.........................................       (79,600)      (30,072)      (148,982)
        Prepaid expenses..................................        56,756      (169,153)       (26,348)
        Accounts payable and other current liabilities....       471,910        44,748        640,291
                                                             -----------   -----------    -----------
        Net cash provided by (used in)
        operating activities..............................       195,241      (747,701)    (5,430,034)
                                                             -----------   -----------    -----------
Cash flows from investing activities:
    Equipment and leasehold improvements costs............        (3,563)      (24,173)      (368,389)
    Patent and trademark costs............................       (17,590)      (41,193)      (442,783)
    Proceeds from sale of equipment.......................                                     11,300
    Deposit...............................................                                     (2,364)
                                                             -----------   -----------    -----------
      Net cash provided by (used in) investing activities.       (21,153)      (65,366)      (802,236)
                                                             -----------   -----------    -----------
Cash flows from financing activities:
    Warrant conversion....................................                                    629,204
    Borrowings from stockholders..........................                                    253,623
    Repayment to stockholders.............................                                   (127,683)
    Sale of common stock and units........................       736,175       351,312      8,794,906
    Sale of option to purchase units......................                                        100
    Public offering costs.................................                                 (1,343,502)
    Issuance of preferred stock...........................                                    450,000
                                                             -----------   -----------    -----------
      Net cash provided by financing activities...........       736,175       351,312      8,656,648
                                                             -----------   -----------    -----------
NET INCREASE (DECREASE) IN CASH...........................       910,263      (461,755)     2,424,378
Cash at beginning of period...............................     1,514,115     2,527,865
                                                             -----------   -----------    -----------
CASH AT END OF PERIOD.....................................   $ 2,424,378   $ 2,066,110    $ 2,424,378
                                                             ===========   ===========    ===========
</TABLE>

See notes to condensed financial statements.

                                      3

<PAGE>
                                                      SYMBOLLON CORPORATION
                          (a development stage company)

                     NOTES TO CONDENSED FINANCIAL STATEMENTS
                                   (Unaudited)

Note A - Description of Business:

         Symbollon  Corporation  ("Symbollon"  or the  "Company")  was formed to
develop  and  commercialize  proprietary  iodine-based  products  for  infection
control and treatment in biomedical and bioagricultural  industries. The Company
is  in  the  development  stage  and  its  efforts  since  inception  have  been
principally  devoted to research and development,  securing patent and trademark
protection  and raising  capital.  Management  of the Company  anticipates  that
additional  losses will be incurred as these efforts are pursued.  In 1995,  the
Company  signed a  marketing  and supply  agreement  for its first  product  and
commenced shipping.

Note B - Accounting Policies and Disclosure:

         The accompanying  unaudited financial  statements do not contain all of
the disclosures required by generally accepted accounting  principles and should
be read in conjunction with the financial  statements and related notes included
in the Company's Form 10-KSB for the year ended December 31, 1998 filed with the
Securities and Exchange Commission.

         In the opinion of  management,  the  financial  statements  reflect all
adjustments,  all of which are of a normal recurring  nature,  to fairly present
the Company's  financial  position,  results of operations  and cash flows.  The
results of operations for the nine and  three-month  periods ended September 30,
1999 are not  necessarily  indicative of the results to be expected for the full
year.

Note C - Capitalization:

         Pursuant to stockholder  approval  received on May 26, 1999 at the 1999
Annual Meeting,  the Company offered (the "Offering") in a private  placement up
to 1,250,00  units (the "Units"),  each Unit  consisting of one share of Class A
Common Stock and one redeemable warrant exercisable for another share of Class A
Common Stock.  The Company sold 836,685 Units for $1,464,199  ($1,357,466 net of
placement agents'  commissions),  of which 278,385 Units were sold in the fourth
quarter  of 1999  (see  Part  II - Item 2.  "Changes  in  Securities  and Use of
Proceeds" below).


<PAGE>


Item 2.  Management's Discussion and Analysis or Plan of Operation

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

         Symbollon  is a  development  stage  company.  Since  inception  of the
Company's  predecessor  in 1986,  the  Company's  efforts have been  principally
devoted to research and  development,  securing patent and trademark  protection
and raising capital,  most of which efforts commenced after May 1991. Except for
revenue  earned since 1995 on sales of IodoZyme,  the Company's  sole revenue to
date has been from research and  development  contracts with corporate  partners
and interest income.

Forward-Looking Statements

In addition to the  historical  information  contained  herein,  this  Quarterly
Report on Form 10-QSB contains  "forward-looking  statements" within the meaning
of the Private  Securities  Litigation  Reform Act of 1995,  including,  but not
limited  to  statements  concerning  plans,   objectives,   goals,   strategies,
prospects,  revenues,  liquidity and capital resources,  financial needs, future
performance,  costs and expenditures and Year 2000 matters.  Such statements may
be  identified  or  qualified,  without  limitation,  by words such as "likely",
"will", "suggests", "may", "would", "could", "should", "expects", "anticipates",
"estimates",  "plans",  "projects",  "believes",  or  similar  expressions  (and
variants  of  such  words  or   expressions).   Investors  are  cautioned   that
forward-looking   statements  are  inherently  uncertain.   Actual  performance,
achievements and results may differ  materially from those expressed,  projected
or  suggested  in the  forward-looking  statements  due  to  certain  risks  and
uncertainties,  including,  but not  limited  to, the  Company's  early stage of
development,   dependence  on  collaborative   partners,   additional  financing
requirements and availability,  history (and expectation) of losses, uncertainty
of patent  protection,  uncertainty  associated  with  preclinical  and clinical
testing,   market  acceptance,   intense  competition,   government  regulation,
dependence on key  personnel,  lack of marketing and  manufacturing  experience,
reimbursement  and  drug  pricing  uncertainty,   potential  product  liability,
material  incompatibility,  ability  to  maintain  its  Nasdaq  SmallCap  Market
listing,  possible Year 2000 problems,  hazardous materials, and the other risks
and  uncertainties  described or discussed in the section "Risk  Factors" in the
Annual  Report on Form  10-KSB for the  period  ended  December  31,  1998.  The
forward-looking  statements contained herein represent the Company's judgment as
of the date of the  Quarterly  Report on Form 10-QSB,  and the Company  cautions
readers not to place undue reliance on such statements.

Results of Operations

         Symbollon's net income for the  three-month  period ended September 30,
1999 was  $441,036,  reflecting  an increase  of  $353,058  from a net income of
$87,978 in the comparable  1998 period.  Symbollon's net loss for the nine-month
period ended September 30, 1999 was $417,399,  reflecting a decrease of $201,398
from a net loss of $618,797 in the comparable 1998 period.  The increased income
for the  three-month  period and the decreased  loss for the  nine-month  period
resulted  primarily  from  increased  revenues,  partially  offset by  increased
development  costs related to the Company's ongoing Phase II clinical trial. The
Company  expects to  continue  to incur  operating  losses  for the  foreseeable
future.


<PAGE>

         Product  revenues  from sales of IodoZyme for the three and  nine-month
periods  ended  September  30, 1999 were  $122,100 and  $294,600,  respectively,
reflecting an increase of $62,425 and $124,424,  respectively,  from the product
sales in the comparable 1998 periods.  Because the Company's exclusive marketing
partner orders IodoZyme a limited number of times each year, the changes between
periods  reflect  mostly timing  differences in receipt of those orders from the
marketing  partner,  and the increased  sales for the  nine-month  period do not
necessarily reflect correspondingly increased sales for the entire year.

         The gross profit margin on product  sales for the three and  nine-month
periods ended September 30, 1999 were 47% and 31%, respectively, compared to 40%
and 36%, respectively, in the comparable 1998 periods. The decrease in the gross
profit margin on product  sales for the  nine-month  period ended  September 30,
1999 was  primarily  due to  increased  labor and  component  costs and overhead
expenses.

         Contract  revenues for the three-month  period ended September 30, 1999
were $98,872,  reflecting  an increase of $79,787 from the contract  revenues in
the comparable 1998 period.  Contract  revenues for the nine-month  period ended
September  30, 1999 were  $287,751,  reflecting an increase of $268,666 from the
contract  revenues in the comparable 1998 period.  The contract revenues for the
three and  nine-month  periods  ended  September  30, 1999 were  generated  from
development  activities related to the corporate relationship with Bausch & Lomb
Pharmaceuticals, Inc.

         License fees for the three and nine-month  periods ended  September 30,
1999 were $750,000,  reflecting an increase of $350,000 from the license fees in
the comparable 1998 periods.  The increases for the three and nine-month periods
resulted  from  an  increase  in  license  fees  from  the  Company's  corporate
relationship with Bausch & Lomb in the field of ophthalmology.

         Research and development  expenses for the three and nine-month periods
ended September 30, 1999 were $384,885 and $1,298,993, respectively,  reflecting
an  increase of $106,373  and  $486,586,  respectively,  from the  research  and
development expenses in the comparable 1998 periods. The increases resulted from
increased  development  expenses related to the Company's drug candidate for the
treatment of fibrocystic breast disease,  including consulting fees and clinical
costs  associated  with the  Company's  ongoing  Phase  II  clinical  trial  and
conducting a Phase I clinical trial.  The Company  anticipates that research and
development  expenses will remain high over the remainder of 1999 as the Company
completes its ongoing Phase II clinical trial for its drug to treat  fibrocystic
breast disease.

         General and  administrative  expenses for the three-month  period ended
September  30, 1999 was  $99,722,  reflecting  an  increase of $2,938,  from the
general and administrative  expenses in the comparable 1998 period.  General and
administrative  expenses for the nine-month  period ended September 30, 1999 was
$295,741,  reflecting a decrease of $66,292, from the general and administrative
expenses  in  the  comparable  1998  period.  The  decreased  expenses  for  the
nine-month  period  resulted  primarily  from  decreased  employee  salaries and

<PAGE>

related costs and decreased investor and public relations expenses.  The Company
anticipates  that  general and  administrative  expenses  will remain at current
levels for the remainder of 1999.

Liquidity and Capital Resources

         The Company has primarily  funded its activities  through proceeds from
private and public  placements of equity.  As of September 30, 1999, the Company
had working capital of $2,392,127.

         The Company  continues  to incur  operating  losses and has  incurred a
cumulative loss through September 30, 1999 of $6,131,764.  However,  the Company
believes that it has the necessary  liquidity  and capital  resources,  together
with anticipated  future revenues,  to sustain planned operations for the twelve
months  following  September 30, 1999. In the event that the Company's  internal
estimates  relating to its planned  revenues or  expenditures  prove  materially
inaccurate,  the Company may be required to  reallocate  funds among its planned
activities and curtail certain planned expenditures.

         During  the  remainder  of  1999,   the  Company   anticipates   paying
approximately  $76,250 as compensation for its current executive  officers,  and
approximately  $7,763  for  lease  payments  on  its  facilities.   The  Company
anticipates  that the Phase II clinical trial for its drug to treat  fibrocystic
breast disease will cost  approximately  $250,000 over the remainder of 1999. At
December 31, 1998, the Company had a net operating loss carryforward for Federal
income tax purposes of approximately $5,452,000 expiring through 2018.

         The Year 2000 ("Y2K") issue is the result of computer  programs using a
two-digit format, as opposed to four digits, to indicate the year. Such computer
systems  will be unable to  interpret  dates  beyond the year 1999,  which could
cause a system  failure or other  computer  errors,  leading to  disruptions  in
operations.  The Company has  identified  three  major  areas  determined  to be
critical for successful Y2K  compliance:  (1) financial and  information  system
applications,  (2) manufacturing applications and (3) third-party relationships.
In the financial and information  system and manufacturing  areas, the Company's
core financial and reporting  systems,  which were not Y2K compliant,  have been
replaced with Y2K compliant systems.  The Company is requesting  assurances from
all software  vendors from which it has  purchased or from which it may purchase
software that such software will correctly  process all date  information at all
times.  In the  third-party  area,  the Company is in the process of identifying
areas of exposure.  The Company is querying its suppliers and  contractors as to
their  progress in  identifying  and  addressing  problems  that their  computer
systems  will face in correctly  processing  date  information  as the Year 2000
approaches.  Through September 30, 1999, the Company estimates that it has spent
approximately $5,000 in its efforts to achieve Y2K compliance,  all of which has
been  recognized as an expense in the  Company's  Statement of  Operations,  and
estimates  that such costs  subsequent  to  September  30,  1999 will  aggregate
$5,000.  The Company has not determined  what costs, if any, will be incurred in
connection  with the  third-party  area.  The  failure by the Company or a third
party  supplier or  contractor to correct a material Y2K problem could result in
an  interruption  in, or failure  of,  certain  normal  business  activities  or
operations.  Such failures could  materially and adversely  affect the Company's
results of  operations,  liquidity and financial  condition.  Due to the general
uncertainty inherent in the Y2K problem,  resulting in part from the uncertainty

<PAGE>

of  the  Y2K  readiness  of  the  Company's  customers,   suppliers,  and  other
third-party  providers,  the Company is unable to determine at this time whether
the  consequences  of any  Y2K  failures  will  have a  material  impact  on the
Company's results of operations, liquidity or financial condition.


Part II - Other Information

Item 2.  Changes in Securities and Use of Proceeds

         C.(i).  During  October  1999,  the Company  completed  the sale in its
private placement  ("Offering") to persons who qualify as "accredited investors"
as the term is defined in Rule 501 promulgated under the Securities Act of 1933,
as amended  (the  "Securities  Act"),  of an  aggregate  of  836,685  units (the
"Units") at a price of $1.75 per Unit, inclusive of 288,550 Units whose sale was
previously disclosed in the Company's Form 10-QSB for the quarterly period ended
June 30, 1999. Each Warrant will be exercisable for a four-year period ending on
August 10,  2003,  to  purchase  one share of Class A Common  Stock at  exercise
prices per share of $3.00  during the first year,  $4.00 during the second year,
$5.00 during the third year and $6.00 thereafter. The Warrants are redeemable at
the option of Company at $0.01 per Warrant in the event that the average closing
bid price as quoted by Nasdaq (the  average  last  reported  sales price if then
listed on any  national  securities  exchange)  of the Class A Common Stock over
twenty  successive  trading  days is equal to or greater  than $5.00  during the
first year,  $6.00 during the second year, $7.00 during the third year and $8.00
thereafter,  subject to the holder's  right to  exercise.  If the Class A Common
Stock is  neither  quoted  on the  Nasdaq  Market  nor  listed  on any  national
securities exchange, the Warrants are redeemable at the option of the Company if
the  average  closing  bid  price  of  the  Common  Stock  as  reported  in  the
over-the-counter  market in the  so-called  "pink  sheets" or the "OTC  Bulletin
Board  Service"  over twenty  successive  trading  days is $1.00 higher than the
price for each relevant redemption period set forth in the preceding sentence.

         Indianapolis  Securities,  Inc., a National  Association  of Securities
Dealers  (NASD) member,  served as placement  agent (the  "Placement  Agent") in
connection with the Offering of the Units on a "best efforts" basis. The Company
agreed to pay the  Placement  Agent a ten percent  (10.0%) cash  commission  and
Warrants equal to 10.0% of the Units sold (the "Placement  Agent  Warrants") for
investors  identified  and brought to the Offering by the Placement  Agent.  For
investors  identified and brought to the Offering by the Company,  the Placement
Agent  did  not  receive  any  cash   commissions  or  Placement  Agent  Warrant
allocations.

         The Units were  offered in  accordance  with Rule 506 of  Regulation  D
promulgated under the Securities Act, and accordingly the securities  offered in
the Offering were not registered under the Securities Act and may not be offered
or sold by the holders thereof absent  registration  or an applicable  exemption
from the registration  requirements.  The Company did, however, undertake to use
its commercially  reasonable best efforts to file a registration statement under
the Securities Act to register for resale the shares of the Class A Common Stock
included in the Units and issuable  upon  exercise of the Warrants no later than
eight (8) months following the final closing of the Offering.


<PAGE>

The Company  received gross  proceeds of $1,464,199  from the sale of the Units.
Total Placement Agent  commissions  were $106,733,  resulting in proceeds to the
Company of $1,357,466 net of the Placement Agent's commissions.

Item 5. Other Information

         On September 23, 1999, Symbollon was granted a qualifications exception
by the Nasdaq Listing Qualifications Panel. In accordance with that decision, on
or before  October 15, 1999,  the Company was  obligated to make a public filing
with the Securities and Exchange  Commission (the "SEC") and Nasdaq evidencing a
minimum  of  $2,700,000  in net  tangible  assets.  The  filing was to contain a
balance  sheet  with  pro  forma  adjustments  for  any  significant  events  or
transactions  occurring on or before the filing date.  On October 13, 1999,  the
Company  filed a Form 8-K  containing  a balance  sheet as of August  31,  1999,
including  pro forma  adjustments  for any  significant  events or  transactions
occurring on or before the filing date since August 31,  1999,  evidencing  over
$2,700,000 in net tangible  assets.  On October 21, 1999, the Company received a
letter from Nasdaq  indicating  that the Company had complied  with the terms of
its  exception;  and  therefore,  the Company shall continue to be listed on The
Nasdaq SmallCap MarketSM under the listing symbol "SYMBA".

Item 6. Exhibits and Reports on Form 8-K

         (a)      Exhibits

                  See Index to Exhibits on Page E-1.

         (b)      Reports on Form 8-K

                  The Company  filed a report on Form 8-K on October  13,  1999.
The report  contained an Item 5 disclosure  concerning  the Company's  continued
listing on The Nasdaq SmallCap Market (see Part II - Item 5. "Other Information"
above).


                                   SIGNATURES

         In accordance with the requirements of the Exchange Act, the registrant
caused this report to be signed on its behalf of the undersigned, thereunto duly
authorized.

                                  SYMBOLLON CORPORATION

Date:  November 10, 1999          By: /s/ Paul C. Desjourdy
                                     ---------------------------------------
                                     Paul C. Desjourdy, Exec. Vice President/CFO
                                     and authorized signatory


<PAGE>



                              SYMBOLLON CORPORATION

                                INDEX TO EXHIBITS

                                                                         Page #

10.14  Form of Subscription Agreement, dated as of August 10, 1999,
       between the Company and the purchasers of Units...................

10.15  Form of Redeemable Warrant for the purchase of shares of
       Class A Common Stock, dated as of August 10, 1999, issued
       to purchasers of Units............................................

27.1   Financial Data Schedule...........................................






                                                                   Exhibit 10.14


                             SUBSCRIPTION AGREEMENT

         THIS  SUBSCRIPTION  AGREEMENT made as of this 10th day of August,  1999
between Symbollon Corporation, a Delaware corporation with its principal offices
at 37 Loring Drive,  Framingham,  MA 01702 (the "Company"),  and the undersigned
(the "Subscriber").

                  WHEREAS,  the  Company  desires to issue and sell in a private
placement to accredited  investors  (the  "Offering") a minimum of 100,000 Units
and a maximum of  1,250,000  Units  (collectively,  the  "Units") for a purchase
price of $1.75 per Unit, each Unit consisting of (i) one share of Class A Common
Stock,  par value $.001 per share (the  "Common  Stock"),  and (ii) a warrant to
purchase one share of Common Stock (the  "Warrants"),  substantially in the form
set forth as  Attachment V to the  Confidential  Private  Placement  Memorandum,
dated May 3, 1999,  as it may be  supplemented  and amended (the  "Memorandum"),
relating to an  Offering,  and the  Subscriber  desires to acquire the number of
Units set  forth on the  signature  page  hereof,  on the  terms and  conditions
hereinafter set forth.

                  NOW,  THEREFORE,  for and in consideration of the premises and
the mutual  covenants  hereinafter set forth, the parties hereto do hereby agree
as follows:

I.       SUBSCRIPTION FOR UNITS AND REPRESENTATIONS BY SUBSCRIBER

                  1.1 Subject to the terms and conditions hereinafter set forth,
the Subscriber hereby subscribes for and agrees to purchase from the Company the
number of Units set forth upon the  signature  page  hereof at a price  equal to
$1.75 per Unit,  and the  Company  agrees to sell such  number of Units for said
purchase  price.  The purchase  price is payable by (i)  certified or bank check
made payable to Rubin, Baum, Levin,  Constant & Friedman,  as Escrow Agent F/B/O
Symbollon  Corporation (the "Escrow Agent"), or (ii) wire transfer in accordance
with  the  wire   transfer   instructions   set  forth  on   Exhibit  A  hereto,
contemporaneously   with  the  execution  and  delivery  of  this   Subscription
Agreement.  The Subscriber  understands however,  that this purchase of Units is
contingent  upon the Company making sales of a minimum of 100,000 Units prior to
the  Termination  Date as defined in Article III hereof.  This  subscription  is
submitted  to the  Company  in  accordance  with and  subject  to the  terms and
conditions  described  in  this  Agreement  and  the  Memorandum.  Further,  the
Subscriber  understands  that the  Company  intends  to submit  for  stockholder
consideration at the 1999 Annual Meeting of the Stockholders currently scheduled
to be held on May 26, 1999, for purposes of the shareholders  approval policy of
the Nasdaq SmallCap  Market,  a proposal to approve the issuance and sale of any
Units  beyond  the  first  340,000  Units  (the  "Stockholder  Approval"),   and
therefore,  closings for the final  910,000 Units will not occur until after the
Shareholder  Approval or  assurance  from Nasdaq that such sales are exempt from
the Nasdaq SmallCap Market listing requirements relating to stockholder approval
for certain share issuances.

                  1.2 The  Subscriber  recognizes  that  the  purchase  of Units
involves  a high  degree of risk in that (i) the  Company  has had only  limited
operations,  minimal revenues and requires  substantial funds in addition to the
proceeds of this private placement,  (ii) an investment in the Company is highly
speculative  and  only  investors  who  can  afford  the  loss of  their  entire
investment should consider  investing in the Company and the Units, (iii) he may

<PAGE>

not be able to liquidate his investment;  (iv)  transferability of the Units and
the  components  thereof  is  extremely  limited;  and  (v)  in the  event  of a
disposition, an investor could sustain the loss of his entire investment.

                  1.3  The  Subscriber  represents  that  he is  an  "accredited
investor" as such term is defined in Rule 501 of Regulation D promulgated  under
the United States  Securities Act of 1933, as amended (the "Act"),  as indicated
by his responses to the  Confidential  Purchaser  Questionnaire,  and that he is
able to bear the economic risk of an investment in the Units.

                  1.4 The Subscriber  acknowledges  that he has prior investment
experience, including investment in non-listed and non-registered securities, or
he has employed the services of an investment advisor, attorney or accountant to
read all of the documents furnished or made available by the Company both to him
and to all other  prospective  investors in the Units and to evaluate the merits
and risks of such an investment on his behalf, and that he recognizes the highly
speculative nature of this investment.

                  1.5 The Subscriber  acknowledges receipt and careful review of
the Memorandum (which includes certain Risks Factors relating to the Company and
this  Offering),  the Company's  Annual Report on Form 10-KSB for the year ended
December  31,  1998  and a  Proxy  Statement  for the  1999  annual  meeting  of
stockholders of the Company (collectively, the "Offering Documents"), and hereby
represents  that he has been  furnished by the Company during the course of this
transaction with all information regarding the Company which he had requested or
desired to know, that all documents which could be reasonably provided have been
made  available for his  inspection and review;  and that such  information  and
documents  have, in his opinion,  afforded the  Subscriber  with all of the same
information  that would be provided him in a registration  statement filed under
the Act;  that he has been  afforded  the  opportunity  to ask  questions of and
receive answers from duly authorized  officers or other  representatives  of the
Company concerning the terms and conditions of the Offering,  and any additional
information which he had requested.

                  1.6 The Subscriber hereby  acknowledges that this Offering has
not been  reviewed  by the United  States  Securities  and  Exchange  Commission
("SEC") because of the Company's  representations  that this is intended to be a
nonpublic  offering  pursuant  to  Section  4(2)  of  the  Act.  The  Subscriber
represents  that  the  Units  are  being  purchased  for  his own  account,  for
investment and not for distribution or resale to others.  The Subscriber  agrees
that he will not sell or  otherwise  transfer  such  securities  unless they are
registered  under the Act or  unless an  exemption  from  such  registration  is
available.

                  1.7 The  Subscriber  understands  that the  shares  of  Common
Stock,  the Warrants,  and the shares of Common Stock  issuable upon exercise of
the  Warrants  (the  shares  of Common  Stock  sold as part of the Units and the
shares of Common Stock issuable upon exercise of the Warrants collectively shall
be referred to as the "Shares"),  comprising the Units have not been  registered
under the Act by reason of a claimed  exemption  under the provisions of the Act
which depends, in part, upon his investment intention.  In this connection,  the
Subscriber  understands  that it is the  position of the SEC that the  statutory
basis for such exemption would not be present if his representation merely meant

<PAGE>

that his present intention was to hold such securities for a short period,  such
as the capital gains period of tax statutes,  for a deferred  sale, for a market
rise,  assuming  that a market  develops,  or for any other  fixed  period.  The
Subscriber  realizes that, in the view of the SEC, a purchase now with an intent
to resell  would  represent  a  purchase  with an intent  inconsistent  with his
representation  to the  Company,  and  the  SEC  might  regard  such  a sale  or
disposition as a deferred sale to which such exemptions are not available.

                  1.8 The  Subscriber  understands  that  Rule 144 (the  "Rule")
promulgated under the Act requires,  among other conditions,  a one-year holding
period  prior to the resale (in  limited  amounts) of  securities  acquired in a
non-public  offering  without  having to satisfy the  registration  requirements
under  the  Act.  The   Subscriber   understands   that  the  Company  makes  no
representation  or  warranty  regarding  its  fulfillment  in the  future of any
reporting requirements under the Securities Exchange Act of 1934, as amended, or
its  dissemination to the public of any current  financial or other  information
concerning  the Company,  as is required by the Rule as one of the conditions of
its availability.  The Subscriber  understands and hereby  acknowledges that the
Company is under no  obligation  (and does not intend) to register  the Units or
the Warrants  under the Act, and is under no  obligation to the Shares under the
Act except as set forth in Article IV herein.  The Subscriber  consents that the
Company  may, if it desires,  permit the  transfer of the Shares out of his name
only when his  request  for  transfer  is  accompanied  by an opinion of counsel
reasonably  satisfactory  to the Company  that neither the sale nor the proposed
transfer  results in a violation of the Act or any  applicable  state "blue sky"
laws (collectively "Securities Laws"). The Subscriber agrees to hold the Company
and its directors,  officers and controlling persons and their respective heirs,
representatives,  successors and assigns  harmless and to indemnify them against
all  liabilities,  costs  and  expenses  incurred  by  them as a  result  of any
misrepresentation made by the Subscriber contained herein or in the Confidential
Purchaser   Questionnaire  or  any  sale  or  distribution  by  the  undersigned
Subscriber in violation of any Securities Laws.

                  1.9 The  Subscriber  consents to the  placement of a legend on
any certificate or other document evidencing the securities comprising the Units
stating that they have not been  registered  under the Act and setting  forth or
referring to the restrictions on transferability and sale thereof.

                  1.10 The Subscriber  understands  that the Company will review
this Subscription Agreement and the Confidential Purchaser  Questionnaire and is
hereby  given  authority  by the  undersigned  to  call  his  bank or  place  of
employment or otherwise review the financial standing of the Subscriber;  and it
is further agreed that the Company reserves the unrestricted  right to reject or
limit any subscription and to close the offer at any time.

                  1.11 The  Subscriber  hereby  represents  that the  address of
Subscriber  furnished  by him at the end of this  Subscription  Agreement is the
undersigned's  principal  residence  if he is an  individual  or  its  principal
business address if it is a corporation or other entity.

                  1.12 The  Subscriber  acknowledges  that if he is a Registered
Representative  of an NASD  member  firm,  he must  give  such  firm the  notice
required  by the  NASD's  Rules  of Fair  Practice,  receipt  of  which  must be
acknowledged by such firm on the signature page hereof.

                  1.13 The  Subscriber  hereby  represents  that,  except as set
forth in the Offering Documents, no representations or warranties have been made
to the Subscriber by the Company or any agent  (including,  without  limitation,

<PAGE>

any  placement  agent or  syndicate  participant),  employee or affiliate of the
Company and in entering into this transaction,  the Subscriber is not relying on
any  information,  other than that  contained in the Offering  Documents and the
results of independent investigation by the Subscriber.

1.14 If the Subscriber is a Georgia resident, the Subscriber hereby acknowledges
that the Units have been sold in  reliance  on  Paragraph  (13) of Code  Section
10-5-9 of the Georgia Securities Act of 1973.

                  1.15 The Company has retained  Indianapolis  Securities,  Inc.
(the  "Placement  Agents"),  a NASD member firms as agent in connection with the
Offering of the Units on a "best efforts"  basis.  Richard M. Lilly, a principal
and employee of the Placement  Agent, is the beneficial  owner of more than five
percent (5%) of the Company's Common Stock.  Additional NASD member firms may be
invited to participate as syndicate partners (together with the Placement Agent,
herein called the "Agents").  As consideration  for its services,  the Placement
Agent will receive a ten percent  (10.0%) cash  commission  on Units sold by the
Agents  and  Warrants  equal to  10.0%  of the  Units  sold by the  Agents  (the
"Placement  Agent  Warrants").  In turn, the Placement Agent will reallow to the
other Agents 8.0%  allocations  of both the cash  commissions  and the Placement
Agent  Warrants.  The  Agents  did  not  prepare  any of the  information  to be
delivered to  prospective  investors in connection  with the Offering and do not
make any  representation or warranty  concerning the accuracy or completeness of
such information.  Prospective investors are advised to conduct their own review
of the business,  properties  and affairs of the Company  before  subscribing to
purchase Units.

II.      REPRESENTATIONS BY THE COMPANY

                  The Company represents and warrants to the Subscriber that:

                  (a)      The Company is a corporation duly organized, existing
and in good standing under the laws of the State of Delaware and has the
corporate power to conduct the business which it conducts and proposes to
conduct.

                  (b)      The execution, delivery and performance of this
Subscription Agreement by the Company has been duly approved by the Board of
Directors of the Company and, subject to the Stockholder Approval, all other
actions required to authorize and effect the offer and sale of the Units will
have been duly taken and approved.

                  (c)      The Shares and Warrants comprising the Units
(including the Shares issuable upon exercise of the Warrants) have been duly and
validly authorized and when issued and paid for in accordance with the terms
hereof, and of the Warrants, will be fully paid and nonassessable.

                  (d)      The Company will at all times so long as the Warrants
are outstanding have authorized and reserved a sufficient number of shares of
the Common Stock to provide for exercise of the Warrants into the requisite
number of shares of Common Stock.


<PAGE>

                  (e)      The Company has obtained, or is in the process of
obtaining, sufficient licenses, permits and other governmental authorizations
necessary to the conduct of its business; such licenses, permits and other
governmental  authorizations obtained are in full force and effect; and the
Company  is in all  material respects complying therewith.

                  (f)      Except as disclosed in the Offering Documents, the
Company knows of no pending or threatened legal or governmental proceedings to
which the Company is a party which could materially adversely affect the
business, property, financial condition or operations of the Company.

                  (g)      The Company is not in violation  of or default under,
nor will the execution and delivery of this Subscription Agreement, the issuance
of the Units and the consummation of the transactions herein contemplated,
result in a violation of, or constitute a default under,  the certificate of
incorporation or by-laws of the Company, in the performance or observance of any
material obligations, agreement, covenant or condition contained in any bond,
debenture, note or other evidence of indebtedness to which the Company is a
party or by which it or any of its properties  may be bound or in violation of
any material order, rule, regulations writ, injunction, or decree of any
government, governmental instrumentality or court, domestic or foreign.

                  (h)      The  financial  information  contained in the Annual
Report on Form 10-KSB for the fiscal year ended December 31, 1998 (audited)
furnished by the Company to the Subscriber present fairly, in all material
respects, the financial condition of the Company as of the date and for the
periods indicated.

III.     TERMS OF SUBSCRIPTION

                  3.1 The subscription period will begin on May 3, 1999 and will
terminate  upon the earlier to occur of (i) the sale of all of the Units or (ii)
11:59 PM Eastern time on October 30, 1999 unless (in the sole  discretion of the
Company)  extended by the Company for an additional period or periods or earlier
terminated by the Company (the "Termination  Date").  The Units are offered on a
"best efforts" basis,  and the acceptance of  subscriptions is at the discretion
of the Company.  The minimum  subscription  per subscriber shall be 10,000 Units
($17,500);  provided,  however,  that smaller investments may be accepted at the
discretion of the Company.

                  3.2  Placement  of the  Units  will be  made by the  Placement
Agent, who will receive (i) a placement fee in the amount of 10% of the purchase
price of the Units placed and (ii)  Placement  Agent  Warrants equal to 10.0% of
the  Units  sold.  The  Placement  Agent  will  reallow  to  other  Agents  8.0%
allocations of both the cash commission and the Placement Agent Warrants.

                  3.3  Pending the sale of the Units,  all funds paid  hereunder
shall be  deposited  by the  Company  in escrow  with the Escrow  Agent.  If the
Company shall not have obtained subscriptions  (including this subscription) for
purchases  of  100,000  Units,  on or before  the  Termination  Date,  then this
subscription  shall be void and all  funds  paid  hereunder  by the  Subscriber,
without  interest,  shall be  promptly  returned to the  Subscriber,  subject to
paragraph  3.5 hereof.  Sale of the Units  shall occur in one or more  closings,
provided at least the minimum  number of Units are sold.  Unless the Company has

<PAGE>

obtained a Nasdaq listing requirements exemption letter,  Closings for the final
910,000  Units will not occur prior to the 1999 Annual  Meeting of  Stockholders
currently scheduled to be held on May 26, 1999 at which meeting the stockholders
will vote upon their issuance and sale.

                  3.4 The Subscriber  hereby  authorizes and directs the Company
to deliver  the  securities  to be issued to such  Subscriber  pursuant  to this
Subscription  Agreement either to the residential or business address  indicated
in the Confidential Purchaser  Questionnaire,  or as instructed by the Placement
Agent.

                  3.5 The  Subscriber  hereby  authorizes and directs the Escrow
Agent to return any funds for unaccepted  subscriptions to the same account from
which the funds were drawn,  including any customer account  maintained with the
Placement Agent.

IV.      REGISTRATION RIGHTS

                  4.1  Registration.  The Company hereby agrees with the holders
of the Units, or their permitted transferees  (collectively,  the "Holders") who
shall have  agreed in  writing  with the  Company to be bound by the  provisions
hereof  applicable  to the  Holders,  to use its  commercially  reasonable  best
efforts to file  within  eight (8) months  following  the final  closing of this
Offering  a  registration  statement  under the Act  covering  the resale of the
Shares  included in the Units and issuable  upon  exercise of the Warrants  (the
"Registrable Securities") by the Holders.

                  4.2   Registration   Procedures.   In   connection   with  the
registration  of Registrable  Securities  under the Act pursuant to Section 4.1,
the Company will use its commercially reasonable best efforts to:

                        (a)    prepare and file with the SEC a  registration
statement  with  respect to such securities,  and cause such registration
statement to become effective,  and to cause  the  same to  remain  effective
for  such  period  as may be  reasonably necessary to effect the sale of such
securities,  provided that such period need not extend beyond the date that all
the Registrable  Securities are eligible for sale under Rule 144 under the Act
(the "Registration Termination Date").

                        (b)    prepare and file with the SEC such  amendments to
such registration statement and supplements to the prospectus contained therein
as may be necessary to keep such  registration  statement  effective  for such
period as may be  reasonably necessary to effect the sale of such securities,
but not beyond the Registration Termination Date.

                        (c)    furnish  to the  security  holders  participating
in such registration such reasonable number of copies of the registration
statement, preliminary prospectus, final prospectus and such other documents as
they may reasonably request in order to facilitate the public offering of such
securities;

                        (d)    register or qualify the securities covered by
such registration statement under  such  state  securities  or blue sky laws of
such jurisdictions as such participating  holders may  reasonably  request in
writing within ten (10) days following the original filing of such  registration

<PAGE>

statement, except that the Company shall not for any purpose be required to
execute a general consent to service of process or to qualify to do business as
a foreign corporation in any jurisdiction wherein it is not so qualified;

                        (e)    notify the security holders participating in such
registration, promptly after it shall receive notice thereof, of the time when
such registration statement has become effective or a supplement to any
prospectus forming a part of such registration statement has been filed;

                        (f)    notify such holders promptly of any request by
the SEC for the amending or supplementing of such registration statement or
prospectus or for additional information;

                        (g)    prepare and file with the SEC,  promptly upon the
request of any such holders, any  amendments  or  supplements  to such
registration statement or prospectus which, in the opinion of counsel for such
holders (and  concurred in by counsel for the  Company), is  required under  the
Act or the rules and regulations thereunder in connection with the distribution
of Common Stock by such holder,

                        (h)    prepare  and  promptly  file  with  the  SEC and
promptly notify such holders of the filing  of such amendment or supplement  to
such  registration  statement  or prospectus as may be necessary to correct any
statements or omissions if, at the time when a prospectus  relating to such
securities is required to be delivered under the Act,  any event  shall have
occurred  as the result of which any such prospectus  or any other  prospectus
as then in effect would  include an untrue statement of a material  fact or omit
to state any material  fact  necessary to make the statements  therein,  in the
light of the  circumstances  in which they were made, not misleading; and

                        (i)   advise  such  holders,  promptly  after it shall
receive notice or obtain knowledge  thereof,  of the issuance of any stop order
by the SEC suspending the effectiveness of such registration statement or the
initiation or threatening of any proceeding for that purpose and promptly use
its best efforts to prevent the issuance of any stop order or to obtain its
withdrawal if such stop order should be issued.

                  4.3      Expenses.

                        (a)    With  respect to the  registration  pursuant to
Section  4.1 hereof,  all fees, costs and  expenses of and  incidental  to such
registration  (as  specified in paragraph (b) below) shall be borne by the
Company, provided,  however, that any security holders  participating in such
registration  shall bear their pro rata share of any underwriting discount and
commissions and transfer taxes.

                        (b)    The fees,  costs and  expenses  of  registration
to be borne by the Company as provided in paragraph (a) above shall include,
without limitation, all registration, filing, and NASD fees, printing expenses,
fees and disbursements of counsel and accountants for the Company, and expenses
of complying with state securities or blue sky laws of any jurisdictions in
which the securities to be offered are to be registered and qualified, including
blue sky legal fees and expenses of Company counsel.  Fees and  disbursements of

<PAGE>

counsel and accountants for the selling security holders and any other expenses
incurred by the selling security  holders  not  expressly  included  above shall
be borne by the selling security holders.

                  4.4      Indemnification.

                       (a)    To the extent  permitted by law, the Company will
indemnify  and hold harmless each holder of  Registrable  Securities  which are
included in a  registration statement pursuant to the provisions of Section 4.1,
its directors and officers, and any underwriter (as defined in the Act) for such
holder and each person,  if any, who controls such holder or such underwriter
within the meaning of the Act, from and against,  and will reimburse such holder
and each such  underwriter and controlling  person with respect to, any and all
loss, damage,  liability,  cost and expense to which such holder or any such
underwriter or controlling person may become subject under the Act or otherwise,
insofar as such losses, damages, liabilities,  costs or expenses  are caused by
any untrue statement or alleged untrue statement of any material fact contained
in such registration  statement, any  prospectus  contained  therein or any
amendment or supplement  thereto, or arise out of or are based upon the omission
or alleged omission to state therein a  material  fact  required  to be  stated
therein  or  necessary  to make  the statements  therein,  in light of the
circumstances in which they were made, not misleading;  provided,  however, that
the Company will not be liable in any such case to the  extent  that any such
loss,  damage,  liability,  cost or  expenses arises out of or is based upon an
untrue statement or alleged untrue  statement or omission or alleged omission so
made in conformity with information furnished by  such  holder, such underwriter
or  such  controlling  person in writing specifically for use in the preparation
thereof.

                       (b)      Each holder of Registrable  Securities  included
 in a registration  pursuant to
the  provisions  of Section  4.1 hereof will  indemnify  and hold  harmless  the
Company, its directors and officers,  any controlling person and any underwriter
and any person  which  controls  such  underwriter  from and  against,  and will
reimburse the Company,  its directors and officers,  any controlling  person and
any underwriter and any person which controls such  underwriter with respect to,
any and all loss, damage, liability, cost or expense to which the Company or any
controlling  person and/or any  underwriter  or  controlling  person thereof may
become  subject  under the Act or  otherwise,  insofar as such losses,  damages,
liabilities,  costs or expenses  are caused by any untrue  statement  or alleged
untrue statement of any material fact contained in such registration  statement,
any  prospectus  contained  therein or any amendment or supplement  thereto,  or
arise out of or are based upon the omission or alleged omission to state therein
a  material  fact  required  to be  stated  therein  or  necessary  to make  the
statements  therein,  in light of the circumstances in which they were made, not
misleading, in each case to the extent, but only to the extent, that such untrue
statement or alleged  untrue  statement  or omission or alleged  omission was so
made  in  reliance  upon  and in  strict  conformity  with  written  information
furnished by or on behalf of such holder specifically for use in the preparation
thereof.

                     (c)      Promptly  after receipt by an  indemnified  party
pursuant to the provisions of
paragraph  (a) or (b) of this Section 4.4 of notice of the  commencement  of any
action involving the subject matter of the foregoing  indemnity  provisions such
indemnified  party  will,  if  a  claim  thereof  is  to  be  made  against  the
indemnifying  party  pursuant to the  provisions  of said  paragraph (a) or (b),
promptly notify the  indemnifying  party of the  commencement  thereof;  but the

<PAGE>

omission  to so notify  the  indemnifying  party  will not  relieve  it from any
liability which it may have to any  indemnified  party otherwise than hereunder.
In case such action is brought against any indemnified party and it notifies the
indemnifying  party of the commencement  thereof,  the indemnifying  party shall
have the right to participate  in, and, to the extent that it may wish,  jointly
with any other  indemnifying  party  similarly  notified,  to assume the defense
thereof,  with  counsel  reasonably  satisfactory  to  such  indemnified  party,
provided,  however, if the defendants in any action include both the indemnified
party and the indemnifying party and the indemnified party shall have reasonably
concluded  that  there  may be  legal  defenses  available  to it  and/or  other
indemnified  parties which are different from or in addition to those  available
to the  indemnifying  party,  or if there is a conflict of interest  which would
prevent  counsel  for  the  indemnifying   party  from  also   representing  the
indemnified  party,  the  indemnified  party or parties have the right to select
separate  counsel to participate in the defense of such action on behalf of such
indemnified party or parties.  After notice from the indemnifying  party to such
indemnified  party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying  party will not be liable to such indemnified party pursuant to the
provisions  of  said  paragraph  (a) or (b)  for  any  legal  or  other  expense
subsequently  incurred by such indemnified  party in connection with the defense
thereof other than reasonable costs of investigation, unless (i) the indemnified
party shall have  employed  counsel in  accordance  with the  provisions  of the
preceding sentence,  (ii) the indemnifying party shall not have employed counsel
reasonably  satisfactory to the  indemnified  party to represent the indemnified
party  within a  reasonable  time  after the notice of the  commencement  of the
action or (iii) the indemnifying  party has authorized the employment of counsel
for the indemnified party at the expense of the indemnifying party.

                  4.5      Additional Provisions.

                      (a)      Each Holder  agrees  that,  upon  receipt of any
notice from the Company of the
happening of any event requiring the preparation of a supplement or amendment to
a prospectus relating to Registrable Securities so that, as thereafter delivered
to the  Holders,  such  prospectus  will not  contain an untrue  statement  of a
material fact or omit to state any material  fact required to be stated  therein
or necessary to make the  statements  therein not  misleading,  each Holder will
forthwith  discontinue  disposition  of  Registrable  Securities  pursuant  to a
registration  statement  contemplated by Section 4.1 until its receipt of copies
of the  supplemented or amended  prospectus from the Company and, if so directed
by the Company,  each Holder shall deliver to the Company all copies, other than
permanent  file  copies  then in such  Holder's  possession,  of the  prospectus
covering  such  Registrable  Securities  current  at the time of receipt of such
notice.

                      (b)      Each Holder agrees to suspend,  upon request of
the Company, any disposition of
Registrable  Securities  pursuant to the  Registration  Statement and prospectus
contemplated  by  Section  4.1  during  (A) any  period not to exceed two 30-day
periods within any one 12-month period the Company requires in connection with a
primary  underwritten  offering of equity securities and (B) any period,  not to
exceed one 60-day  period per  circumstance  or  development,  when the  Company
determines in good faith that offers and sales  pursuant  thereto  should not be
made  by  reason  of the  presence  of  material  undisclosed  circumstances  or
developments with respect to which the disclosure that would be required in such
a prospectus  is  premature,  would have an adverse  effect on the Company or is
otherwise inadvisable.


<PAGE>

                      (c)      As a condition to the  inclusion  of its
Registrable  Securities,  each Holder
shall  furnish to the Company  such  information  regarding  such Holder and the
distribution proposed by such Holder as the Company may request in writing or as
shall  be  required  in  connection  with  any  registration,  qualification  or
compliance referred to in this Article IV.

                       (d) Each Holder hereby covenants with the Company (1)
not to make any sale of the
Registrable  Securities  without  effectively  causing the  prospectus  delivery
requirements  under  the  Act  to be  satisfied,  and  (2) if  such  Registrable
Securities  are to be sold by any method or in any  transaction  other than on a
national  securities  exchange,  in the  over-the-counter  market,  in privately
negotiated  transactions,  or in a combination  of such  methods,  to notify the
Company  at least five (5)  business  days prior to the date on which the Holder
first offers to sell any such Registrable Securities.

                       (e)      Each  Holder  acknowledges  and agrees  that the
Registrable  Securities  sold
pursuant to the  Registration  Statement  described  in this  Article IV are not
transferable on the books of the Company unless the stock certificate  submitted
to the transfer agent evidencing such Registrable Securities is accompanied by a
certificate  reasonably  satisfactory  to the Company to the effect that (A) the
Registrable  Securities  have been  sold in  accordance  with such  Registration
Statement and (B) the  requirement  of delivering a current  prospectus has been
satisfied.

                      (f)      Each  Holder  agrees not to take any action  with
respect to any  distribution
deemed to be made pursuant to such  Registration  Statement,  that constitutes a
violation of Regulation M under the Exchange Act or any other  applicable  rule,
regulation or law.

                      (g)      At the end of the period  during  which the
Company is  obligated  to keep the
Registration  Statement current and effective as described above, the Holders of
Registrable  Securities included in the Registration Statement shall discontinue
sales of shares pursuant to such  Registration  Statement upon receipt of notice
from the Company of its intention to remove from registration the shares covered
by such  Registration  Statement  which remain  unsold,  and such Holders  shall
notify the  Company  of the  number of shares  registered  which  remain  unsold
immediately upon receipt of such notice from the Company.

V.       MISCELLANEOUS

                  5.1 Any notice or other communication given hereunder shall be
deemed sufficient if in writing and sent by registered or certified mail, return
receipt  requested,  addressed to the  Company,  at its address set forth on the
first page hereof, Attention: Paul C. Desjourdy, Executive Vice President and to
the  Subscriber at his address  indicated on the last page of this  Subscription
Agreement.  Notices  shall be deemed to have been given on the date of  mailing,
except  notices of change of  address,  which shall be deemed to have been given
when received.

                  5.2 This Subscription Agreement shall not be changed, modified
or amended  except by a writing  signed by the parties to be  charged,  and this
Subscription Agreement may not be discharged except by performance in accordance
with its terms or by a writing signed by the party to be charged.


<PAGE>

                  5.3 This  Subscription  Agreement  shall be  binding  upon and
inure to the benefit of the parties hereto and to their respective heirs,  legal
representatives,  successors and assigns. This Subscription Agreement sets forth
the entire  agreement  and  understanding  between the parties as to the subject
matter thereof and merges and supersedes all prior  discussions,  agreements and
understandings of any and every nature among them.

5.4 Notwithstanding the place where this Subscription  Agreement may be executed
by any of the parties hereto, the parties expressly agree that all the terms and
provisions hereof shall be construed in accordance with and governed by the laws
of The Commonwealth of Massachusetts.  The parties hereby agree that any dispute
which  may  arise  between  them  arising  out  of or in  connection  with  this
Subscription  Agreement  shall be adjudicated  before a court located in Boston,
Massachusetts and they hereby submit to the exclusive jurisdiction of the courts
of The Commonwealth of Massachusetts located in Boston, Massachusetts and of the
federal  courts in the District of  Massachusetts  with respect to any action or
legal  proceeding  commenced by any party,  and irrevocably  waive any objection
they now or  hereafter  may have  respecting  the  venue of any such  action  or
proceeding  brought in such a court or respecting the fact that such court is an
inconvenient forum, relating to or arising out of this Subscription Agreement or
any acts or  omissions  relating to the sale of the  securities  hereunder,  and
consent to the  service of process  in any such  action or legal  proceeding  by
means of registered or certified mail, return receipt requested,  in care of the
address set forth below or such other address as the  undersigned  shall furnish
in writing to the other.

                  5.5  This   Subscription   Agreement   may  be   executed   in
counterparts.  Upon the execution and delivery of this Subscription Agreement by
the Subscriber, this Subscription Agreement shall become a binding obligation of
the  Subscriber  with  respect  to the  purchase  of Units as  herein  provided;
subject,  however, to the right hereby reserved to the Company to enter into the
same agreements with other subscribers and to add and/or to delete other persons
as subscribers.

                  5.6  The  holding  of  any  provision  of  this   Subscription
Agreement to be invalid or  unenforceable  by a court of competent  jurisdiction
shall not affect any other provision of this Subscription Agreement, which shall
remain in full force and effect.

                  5.7 It is agreed that a waiver by either  party of a breach of
any provision of this Subscription Agreement shall not operate, or be construed,
as a waiver of any subsequent breach by that same party.

                  5.8 The parties  agree to execute and deliver all such further
documents,  agreements and instruments and take such other and further action as
may be  necessary  or  appropriate  to carry out the purposes and intent of this
Subscription Agreement.



<PAGE>


         IN  WITNESS  WHEREOF,  the  parties  have  executed  this  Subscription
Agreement as of the day and year first written above.



- ------------------------------                  ------------------------------
Signature of Subscriber(s)



- ------------------------------                  ------------------------------
Name of Subscriber(s)
[please print]


- ------------------------------                 ------------------------------
Address of Subscriber(s)


- ------------------------------                 ------------------------------
Social Security of Taxpayer
Identification Number of Subscriber(s)


- ------------------------------                 ------------------------------
Number of Units Subscribed For


* If Subscriber is a Registered  Representative  with an NASD member firm,  have
the following  acknowledgment  signed by the appropriate  party: The undersigned
NASD  member  firm  acknowledges  receipt of the notice  required  by Article 3,
Sections 28(a) and (b) of the Rules of Fair Practice.

- ---------------------------------
Name of NASD Member Firm

- ---------------------------------
By:  Authorized Officer
                                        Subscription Accepted:

                                        SYMBOLLON CORPORATION


                                        By:_____________________________________
                                           Paul C. Desjourdy,
                                           ExecutiveVice President and
                                           Chief Financial Officer

                                        Date: _______________, 1999


<PAGE>


                                    EXHIBIT A

                           WIRE TRANSFER INSTRUCTIONS


         Subscribers may also pay the subscription amount by wire transfer to:

                  Chase Manhattan Bank
                  1211 Avenues of Americas
                  New York, NY 10036
                  Account Number 967-097940
                  ABA Routing Number 021000021
                  For the account of: "Rubin Baum Levin Constant & Friedman,
                  as Escrow Agent F/B/O Symbollon Corporation"
                  Name of Subscriber:  [Insert Investor Name]






                                                                   Exhibit 10.15


THE  WARRANT  REPRESENTED  BY THIS  CERTIFICATE  AND THE  SHARES  ISSUABLE  UPON
EXERCISE  HEREOF HAVE NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "ACT"),  OR ANY STATE  SECURITIES  LAWS AND NEITHER SUCH SECURITIES
NOR ANY INTEREST THEREIN MAY BE OFFERED,  SOLD,  PLEDGED,  ASSIGNED OR OTHERWISE
TRANSFERRED  UNLESS  (1)  A  REGISTRATION  STATEMENT  WITH  RESPECT  THERETO  IS
EFFECTIVE  UNDER THE ACT AND ANY APPLICABLE  STATE  SECURITIES  LAWS, OR (2) THE
COMPANY RECEIVES AN OPINION OF COUNSEL  REASONABLY  SATISFACTORY TO THE COMPANY,
THAT SUCH SECURITIES MAY BE OFFERED,  SOLD, PLEDGED,  ASSIGNED OR TRANSFERRED IN
ANY MANNER CONTEMPLATED  WITHOUT AN EFFECTIVE  REGISTRATION  STATEMENT UNDER THE
ACT OR APPLICABLE STATE SECURITIES LAWS.

                              SYMBOLLON CORPORATION

     Redeemable Warrant for the Purchase of Shares of Class A Common Stock,
                            par value $.001 per share

                     This Warrant Expires on August 10, 2003


No.                                                                     Shares


         This is to verify that, FOR VALUE  RECEIVED,                 ,  with an
address at                                                , telephone no.
       ,  or its registered permitted assigns  (hereinafter  referred to as the
"Holder") is entitled to purchase,  subject to the terms and conditions  hereof,
from Symbollon Corporation, a Delaware corporation (the "Company"),
(      ) shares of the Class A Common Stock of the Company,  par value $.001 per
share (the  "Common  Stock"),  at any time from  August 10,  1999 (the  "Initial
Date") and ending  (except as otherwise  provided in  paragraph  5(b) hereof) at
5:00 p.m. Eastern Standard Time on August 10, 2003 (the "Termination  Date"), at
an exercise price per share of $3.00 until the first  anniversary of the Initial
Date (the "First  Year"),  $4.00 from the first  anniversary of the Initial Date
until the second anniversary of the Initial Date (the "Second Year"), $5.00 from
the second  anniversary  of the Initial Date until the third  anniversary of the
Initial Date (the "Third Year") and $6.00 thereafter,  as the same may hereafter
be adjusted in  accordance  with the terms  hereof (as the same may be adjusted,
the "Exercise  Price").  The number of shares of Common Stock  purchasable  upon
exercise of this Warrant (the  "Warrant")  shall be subject to  adjustment  from
time to time upon the  occurrence  of  certain  events as set forth  below.  The
shares of Common  Stock  issuable or issued upon  exercise of this  Warrant,  as
adjusted from time to time,  are sometimes  referred to hereinafter as "Exercise
Shares."


<PAGE>



         This  Warrant  is one  of the  warrants  (collectively,  including  any
warrants  issued upon the exercise or transfer of any such  warrants in whole or
in part, the "Warrants")  issued pursuant to an offering (the "Offering") by the
Company of Units,  each  consisting of one share of Common Stock and one Warrant
for one share of Common  Stock,  pursuant to a  Confidential  Private  Placement
Memorandum,  dated May 3, 1999,  as it may be amended or  supplemented.  As used
herein the term "this  Warrant"  shall mean and  include  this  Warrant  and any
Warrant  or  Warrants  hereafter  issued as a  consequence  of the  exercise  or
transfer of this Warrant in whole or in part.

         1.       Exercise of Warrant; Issuance of Exercise Shares.

                  (a)  Exercise of  Warrants.  This  Warrant may be exercised in
whole at any time or in part  from  time to time on or after  the  Initial  Date
until and including the Termination  Date, upon surrender of this Warrant on any
Business Day, as hereinafter  defined,  to the Company at its principal  office,
presently  located at the  address of the Company set forth in Section 10 hereof
(or such other  principal  office of the Company,  if any, as shall  theretofore
have been  designated by the Company by written notice to the Holder),  together
with: (i) a completed and duly executed  Notice of Warrant  Exercise in the form
set forth in Exhibit A hereto and made a part  hereof  (an  "Exercise  Notice");
(ii) payment in full of the Exercise Price for the number of Exercise Shares set
forth in the Exercise  Notice,  in lawful money of the United States of America,
by  certified  check or bank  cashier's  check made  payable to the order of the
Company,  or by wire  transfer  of  immediately  available  funds to an  account
designated by the Company;  and (iii) such other  instruments or agreements duly
signed  by the  Holder  as  may,  in the  Company's  discretion,  be  reasonably
necessary or advisable in order that the issuance of such Exercise Shares comply
with  applicable  rules and  regulations  under any applicable  federal or state
securities  laws  or  any  requirement  of  any  national  securities  exchange,
association   or   quotation   system  on  which  Common  Stock  may  be  traded
(collectively,  "Related  Instruments").  For purposes of this Warrant, the term
"Business Day" shall be understood to mean any day upon which  commercial  banks
in Middlesex  County,  Massachusetts are not required or authorized by law to be
closed. Upon such surrender of this Warrant and related Exercise Notice (and any
Related  Instruments,  if  required)  and  payment  of  the  Exercise  Price  as
aforesaid, the Company shall issue and cause to be delivered with all reasonable
dispatch to or upon the written order of the Holder and in such name or names as
the Holder may designate,  a certificate or certificates  for the number of full
shares of Common Stock  comprising the applicable  number of Exercise  Shares so
purchased upon the exercise of this Warrant.  Such  certificate or  certificates
shall be deemed to have been issued,  and any person so  designated  to be named
therein shall be deemed to have become a holder of record of the Exercise Shares
represented thereby, as of the date of surrender of this Warrant (accompanied by
the related Exercise Notice and Related Instruments, if any) and payment in full
of the Exercise  Price,  as  aforesaid,  notwithstanding  that the  certificates
representing such Exercise Shares shall not actually have been delivered or that
the transfer  shall not have been  reflected on the stock  transfer books of the
Company.  Upon any partial exercise of this Warrant,  the Company shall issue to
the Holder a new  Warrant in  respect  of the  Exercise  Shares as to which this
Warrant has not been  exercised.  This  Warrant and all rights  hereunder  shall
expire on the  Termination  Date and shall be wholly null and void to the extent
this Warrant is not exercised  prior to 5:00 p.m.  Eastern  Standard Time on the
Termination Date.


<PAGE>

                  (b) Exercise Shares Fully Paid and Non-Assessable. The Company
agrees and covenants that all Exercise  Shares issuable upon the due exercise of
this Warrant will,  upon issuance in accordance  with the terms hereof,  be duly
authorized,  validly issued, fully paid and non-assessable and free and clear of
all taxes with respect to the issuance thereof (other than taxes which, pursuant
to Section 2 hereof,  the Company  shall not be obligated to pay) and any liens,
charges and security interests created by the Company.

                  (c)  Reservation  of Exercise  Shares.  The Company agrees and
covenants  that  at all  times  prior  to the  Termination  Date  it  will  have
authorized,  and hold in reserve,  a number of authorized but unissued shares of
Common Stock as shall from time to time be  sufficient to permit the issuance of
all Exercise Shares issuable upon the full exercise of this Warrant.

         2. Payment of Taxes. The Company will pay all documentary  stamp taxes,
if any,  attributable  to the  initial  issuance  of  Exercise  Shares  upon the
exercise of this  Warrant;  provided,  however,  that the  Company  shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance of this Warrant or in respect of any  certificates  for Exercise
Shares issued  pursuant  hereto in a name other than that of the Holder upon the
exercise  of this  Warrant,  and the  Company  shall not be required to issue or
deliver such certificates  unless or until the person or persons  requesting the
issuance  thereof shall have paid to the Company the amount of such tax or shall
have  established to the satisfaction of the Company that such tax has been paid
or is not required to be paid.

         3.  Limited  Rights of  Holder.  The  Holder  shall  not,  by virtue of
anything  contained in this Warrant or otherwise  (except upon  exercise of this
Warrant,  with respect to the Exercise Shares purchased thereby), be entitled to
any right whatsoever,  either in law or equity, of a stockholder of the Company,
including  without  limitation,  the right to receive dividends or to vote or to
consent  or to  receive  notice as a  stockholder  in  respect  of  meetings  of
stockholders or the election of directors of the Company or any other matter.

         4.  Registration  of Transfers  and  Exchanges.  This Warrant  shall be
transferable,  subject to the provisions of Section 8 hereof,  upon the books of
the Company to be  maintained  by it for that  purpose,  upon  surrender of this
Warrant  to the  Company  at  its  principal  office  accompanied  by a  written
instrument or instruments of transfer in the form of Exhibit B hereto or in such
other form as may be satisfactory to the Company and duly executed by the Holder
or by the duly appointed  legal  representative  thereof or by a duly authorized
attorney and upon payment of any  necessary  transfer tax or other  governmental
charge imposed upon such transfer. In all cases of transfer by an attorney,  the
original  power of attorney,  duly approved,  or an official copy thereof,  duly
certified,  shall be deposited and remain with the Company.  In case of transfer
by executors,  administrators,  guardians or other legal  representatives,  duly
authenticated evidence of their authority shall be produced, and may be required
to be  deposited  and remain with the Company in its  discretion.  Upon any such
registration  of transfer,  a new Warrant shall (subject to Section 2 hereof) be

<PAGE>

issued  to the  transferee  named  in  such  instrument  of  transfer,  and  the
surrendered Warrant shall be cancelled by the Company.

         5. Adjustment of Warrant. The Exercise Price and the number and kind of
securities issuable upon exercise of this Warrant shall be subject to adjustment
from time to time as set forth below:

                  (a) Dividends,  Subdivisions or  Combinations.  If the Company
shall at any time (i) pay a dividend or make a distribution  on the Common Stock
in shares of its Common Stock,  (ii) subdivide its outstanding  Common Stock, or
(iii) combine its outstanding  Common Stock into a smaller number of shares, the
number of shares of Common  Stock which may be purchased  upon  exercise of this
Warrant  thereafter  shall be adjusted  so that the number of shares  thereafter
purchasable upon exercise of this Warrant shall be equal to the number of shares
which the Holder would have been entitled to receive after the happening of such
event had this  Warrant  been  exercised  immediately  prior to such event.  Any
adjustment  made  pursuant  to  this  Paragraph  5(a)  shall  become   effective
retroactively  to the  relevant  record date in the case of a dividend and shall
become effective on the relevant  effective date, in the case of any subdivision
or  combination.  No adjustment  hereunder  shall be made in respect of any cash
dividends.

                  (b) Reclassifications, Reorganizations and other Transactions.
In case of any  reclassification,  capital  reorganization  or other  change  of
outstanding  Common  Stock  (other  than a  subdivision  or  combination  of the
outstanding  Common Stock and other than a change in the par value of the Common
Stock),  or in case of any  consolidation  or merger of the Company with or into
another  corporation  (other than a merger with a  subsidiary  of the Company in
which the Company is the continuing  corporation and that does not result in any
reclassification,  capital  reorganization or other change of outstanding Common
Stock of the class  issuable upon exercise of this  Warrant),  or in case of any
sale, lease,  transfer or conveyance to another  corporation of the property and
assets of the  Company as an  entirety  or  substantially  as an  entirety,  the
Company  shall,  as a  condition  precedent  to  such  transaction,  cause  such
successor or purchasing  corporation,  as the case may be (or, if the Company is
not the  surviving  or acquiring  entity,  shall use its  reasonable  efforts to
negotiate to cause such successor or acquiring corporation), to execute with the
Holder an agreement  granting the Holder the right  thereafter,  upon payment of
the Exercise Price in effect  immediately  prior to such action, to receive upon
exercise of this Warrant the kind and amount of shares and other  securities and
property  which the  Holder  would have  owned or would  have been  entitled  to
receive after the happening of such  reclassification,  capital  reorganization,
change,  consolidation,  merger,  sale,  lease,  transfer or conveyance had this
Warrant been exercised  immediately  prior to such action.  Such agreement shall
provide for adjustments in respect of such shares of stock and other  securities
and property  which shall be as nearly  equivalent as may be  practicable to the
adjustments  provided for in this Section. As to any consolidation or merger, or
any  conveyance  or  transfer  of the  assets  and  properties  of  the  Company
substantially as an entirety, in which the Company shall not be the surviving or
acquiring party and in connection with which the Company, despite its reasonable
efforts  to do so, is unable to  negotiate  the  assumption  of the  obligations
represented  by this  Warrant  by the  surviving  or  acquiring  entity,  or any
transaction  pursuant to which the Company shall have disposed of  substantially

<PAGE>

all of its assets, or any transaction  constituting the voluntary or involuntary
dissolution,  liquidation  or winding up of the  Company,  the right to exercise
this  Warrant  shall  expire at the close of  business on the later of the dates
specified  in the notice of such  transaction  delivered  by the  Company to the
Holder pursuant to Section 6 hereof as the date on which any such consolidation,
merger, conveyance, transfer, dissolution, liquidation or winding up is expected
to become  effective  and the date as of which it is  expected  that  holders of
record of shares of Common  Stock shall be entitled to exchange  such shares for
securities  or other  property,  if any,  deliverable  upon  the  consolidation,
merger, conveyance,  transfer,  dissolution,  liquidation or winding up. If this
Warrant has not been exercised in such cases on or prior to such aforesaid date,
it shall, anything herein to the contrary  notwithstanding,  become void and all
rights under this Warrant shall cease.

                  (c)  Corresponding  Exercise  Price  Adjustments.   After  any
adjustment  of the  number  or kind of shares or other  securities  or  property
issuable  upon  exercise  of this  Warrant  pursuant to the  provisions  of this
Section 5, the  Exercise  Price  shall also be  adjusted  so that the  aggregate
Exercise Price  thereafter  payable upon exercise of this Warrant shall be equal
to the aggregate  Exercise  Price which would have been payable upon exercise of
this Warrant immediately prior to such adjustment for the purchase of the number
or kind of shares or other  securities or other property  issuable upon exercise
of this Warrant.

                  (d)  Adjustment  Limitations.  No  adjustment in the number of
Exercise  Shares  issuable  upon  exercise of this  Warrant,  or of the Exercise
Price,  shall be required to be made unless  such  adjustment  would  require an
increase or decrease of at least five percent (5%); provided,  however, that any
adjustments  which by reason of this Paragraph are not required to be made shall
be carried  forward and taken into  account in any  subsequent  adjustment.  All
calculations  under this  Section 5 shall be made to the nearest cent or one-one
hundredth  of a share,  as the case may be, but in no event shall the Company be
obligated to issue  fractional  shares upon  exercise of this Warrant or to make
any cash payment in lieu thereof,  and any fractional  shares  issuable upon the
exercise hereof shall be rounded down to the immediately prior whole share.

                  (e)  Form  of  Warrant  After  Adjustments.  The  form of this
Warrant need not be changed  because of any adjustments in the Exercise Price or
the number or kind of the Exercise  Shares,  and this  Warrant,  and any warrant
thereafter issued in substitution for this Warrant,  may continue to express the
same Exercise Price and number and kind of Exercise Shares as are stated in this
Warrant, as initially issued.

                  6.  Rights of  Holder.  Without  limiting  anything  contained
elsewhere herein, in case at any time:

                      (a)      The Company shall declare any dividend upon its
Common Stock payable  otherwise than in Common Stock of the Company; or


<PAGE>

                      (b)      The Company  shall offer for  subscription  to
all of the holders of its Common Stock  any  additional  shares  of stock of any
class or any  other  securities convertible into shares of stock or any rights
to subscribe thereto; or

                      (c)      There shall be any capital  reorganization or
reclassification  of the capital
stock of the Company, or a sale of all or substantially all of the assets of the
Company,  or a consolidation or merger of the Company with another  corporation,
other  than a merger  with a  subsidiary  in which  merger  the  Company  is the
continuing  corporation  and which  does not result in any  reclassification  or
change of the then  outstanding  shares of Common Stock or other  capital  stock
issuable upon exercise of this Warrant other than a change in par value (or from
par value to no par value or from no par value to par value); or

                      (d)       There shall be a voluntary or involuntary
dissolution,  liquidation or winding up of the Company;

then, in any one or more of said cases,  the Company shall cause to be mailed to
the Holder,  at the earliest  practicable time (and, in any event, not less than
10 days before any record date or other date set for definitive action), written
notice  of the date on which the books of the  Company  shall  close or a record
shall   be   taken   for   such    dividend,    subscription,    reorganization,
reclassification, consolidation, merger, dissolution, liquidation or winding up,
as the  case may be.  Such  notice  shall  also set  forth  such  facts as shall
indicate  the effect of such  action (to the extent  such effect may be known at
the date of such  notice) on the  Exercise  Price and the kind and amount of the
shares of stock and other  securities and property  deliverable upon exercise of
this Warrant. Such notice shall also specify the date as of which the holders of
the Common Stock of record shall  participate  in said dividend or  subscription
rights or shall be entitled to exchange  their  Common Stock for  securities  or
other  property   deliverable   upon  such   reorganization,   reclassification,
consolidation,  merger, dissolution,  liquidation or winding up, as the case may
be. Notwithstanding  anything in this Section 6 to the contrary,  however, it is
agreed  that the  failure of the  Company to give any such notice of a corporate
action shall not invalidate such corporate action.

         7.  Registration  Rights.  Certain  registration  rights  covering  the
Exercise Shares are set forth in Article IV of the Subscription  Agreement dated
August 10, 1999 between the Company and the Holder.

         8. Restrictions on Transferability - Restrictive  Legend.  Neither this
Warrant  nor any of the  Exercise  Shares (nor any  interest  herein or therein)
shall be sold,  assigned,  pledged,  encumbered,  or  otherwise  transferred  or
disposed of except in accordance with the provisions of this Section:

                  (a)  Restrictions on Transfer;  Indemnification.  Neither this
Warrant nor any  Exercise  Shares may be offered for sale or sold,  or otherwise
transferred  or disposed of, in any  transaction  which would  constitute a sale
thereof  within  the  meaning of the  Securities  Act of 1933,  as amended  (the
"Act"),  unless (i) such security has been registered for sale under the Act and

<PAGE>

registered or qualified under  applicable  state securities laws relating to the
offer  and  sale  of  securities,  or  (ii)  exemptions  from  the  registration
requirements of the Act and the  registration or  qualification  requirements of
all such state securities laws are available and the Company shall have received
an opinion of counsel  satisfactory  to the Company  that the  proposed  sale or
other  transfer  or  disposition  of such  securities  may be  effected  without
registration  under  the  Act and  would  not  result  in any  violation  of any
applicable  state  securities laws relating to the registration or qualification
of  securities  for sale.  The Holder  agrees to indemnify and hold harmless the
Company  against  any  loss,  damage,  claim or  liability  (including,  without
limitation,  any legal costs or expenses  incurred by the Company)  arising from
the sale,  transfer or other  disposition of this Warrant or any Exercise Shares
held by the Holder, or any interest  therein,  in violation of the provisions of
this Section 8.

                  (b) Restrictive Legends.  Unless and until otherwise permitted
by this  Section 8, this  Warrant,  each warrant  issued to the Holder  pursuant
hereto or to any  transferee or assignee of this Warrant,  and each  certificate
representing Exercise Shares issued upon exercise of this Warrant or any warrant
issued to the Holder  pursuant  hereto or to any  transferee or assignee of this
Warrant,  or to any  transferee  of the person to whom any  Exercise  Shares are
issued,  shall bear a legend setting forth the  requirements of Paragraph (a) of
this Section 8,  together  with such other legend or legends as may otherwise be
deemed necessary or appropriate by counsel to the Company.

                  (c) Notice of Proposed Transfers. Prior to any transfer, offer
to transfer or attempted  transfer of this Warrant or any Exercise  Shares,  the
holder  of such  security  shall  give  written  notice to the  Company  of such
holder's intention to effect such transfer.  Each such notice (i) shall describe
the manner and circumstances of the proposed transfer in reasonable  detail, and
shall  contain an  undertaking  by the person giving such notice to furnish such
other  information as may be required,  to enable counsel to the Company to make
the  determinations  referred to below, and (ii) shall designate the counsel for
the person giving such notice, such counsel to be reasonably satisfactory to the
Company.  The person  giving  such  notice  shall  submit a copy  thereof to the
counsel designated in such notice, and the following provisions shall apply:

                           (i)      If, in the opinion of counsel to the
Company,  the  proposed  transfer of this
Warrant or Exercise Shares, as appropriate, may be effected without registration
of such security  under the Act or under any  applicable  state law, the Company
shall,  as promptly as  practicable,  so notify the holder of such  security and
such holder shall  thereupon be entitled to transfer such security in accordance
with the terms of the  notice  delivered  by such  holder to the  Company.  Each
certificate   evidencing  the  securities  thus  to  be  transferred  (and  each
certificate  evidencing any untransferred balance of the securities evidenced by
such  certificate)  shall bear the restrictive  legends referred to in Paragraph
(b) of this  Section 8,  unless in the  opinion of counsel to the  Company  such
legends are not required in order to ensure compliance with the Act.

                           (ii)     If, in the  opinion  of  counsel  to the
Company,  the  proposed  transfer  of
securities may not be effected without  registration  under the Act or under any
applicable  state law, the Company shall, as promptly as practicable,  so notify
the holder  thereof.  However,  except as  referenced  in Section 7 hereof,  the

<PAGE>

Company shall have no obligation to register such securities under the Act.

                  The holder of the  securities  giving  the  notice  under this
Paragraph (c) shall not be entitled to transfer any of the  securities  that are
the  subject to such  notice  until  receipt of notice  from the  Company  under
subparagraph  (i) of this Paragraph (c) or registration of such securities under
the Act, and under any applicable state law, has become effective.

                  (d) Removal of Legend.  The Company  shall,  at the request of
any  registered  holder of this  Warrant or any  Exercise  Share issued upon the
exercise  hereof,  exchange the  certificate  representing  such  security for a
certificate  representing the same security not bearing the restrictive  legends
required by Paragraph (b) of this Section 8 if, in the opinion of counsel to the
Company, such restrictive legends are no longer necessary.

         9. Redemption of the Warrants.

                  (a) Redemption  Right. On a date (the  "Redemption  Date") not
less than fifteen (15) days from the date notice (the "Notice of Redemption") is
given to the Holder, this Warrant may be redeemed, at the option of the Company,
at a redemption price of $.01 per Warrant (the "Redemption Price"), in the event
that during a period  ending  within thirty (30) days prior to the date on which
the Notice of  Redemption  is given,  (i) (x) if the  Common  Stock is quoted on
Nasdaq,  the average  closing bid price or (y) if the Common  Stock is listed on
any national securities  exchange,  the average last reported sales price on the
primary  exchange  on  which  the  Common  Stock is  traded,  over  twenty  (20)
successive  trading  days is equal to or greater  than:  $5.00  during the First
Year,  $6.00  during  the  Second  Year,  $7.00  during the Third Year and $8.00
thereafter;  or (ii) if the Common Stock is neither  quoted on the Nasdaq Market
nor listed on any national securities exchange, the average closing bid price of
the Common  Stock as reported in the  over-the-counter  market in the  so-called
"pink sheets" or the "OTC Bulletin Board  Service",  over twenty (20) successive
trading days is equal to or greater  than:  $6.00  during the First Year,  $7.00
during the Second Year,  $8.00 during the Third Year and $9.00  thereafter  (the
"Target Price"), subject to adjustment as set forth in Paragraph 9(e) below. The
date  fixed  for  redemption  of this  Warrant  is  referred  to  herein  as the
"Redemption Date".

                  (b)  Notice  of  Redemption.  If the  conditions  set forth in
Section  9(a) are met,  and the Company  desires to exercise its right to redeem
this  Warrant,  the Company  shall mail the Notice of  Redemption to the Holder,
first class,  postage prepaid, at his address set forth on the first page hereof
(or such other  address of the Holder,  if any, as shall  theretofore  have been
designated by the Holder by written notice to the Company). Any notice mailed in
the manner  provided  herein  shall be  conclusively  presumed to have been duly
given on the date mailed by the Company  whether or not the Holder receives such
notice.  The Notice of Redemption shall specify (i) the Redemption  Price,  (ii)
the  Redemption  Date,  (iii) the place where the Warrant  certificate  shall be
delivered and the Redemption Price paid and (iv) that the right to exercise this
Warrant shall terminate at 5:00 p.m.  Eastern  Standard Time on the Business Day
immediately  preceding  the  Redemption  Date.  An  affidavit  of the  Company's

<PAGE>

Secretary or Assistant  Secretary  that the Notice of Redemption has been mailed
shall,  in the  absence of fraud,  be prima facie  evidence of the facts  stated
therein.

                  (c) Right to  Exercise  Warrant.  Any right to  exercise  this
Warrant shall terminate at 5:00 p.m.  Eastern  Standard Time on the Business Day
immediately preceding the Redemption Date. On and after the Redemption Date, the
Holder shall have no further  rights except to receive,  upon  surrender of this
Warrant, the Redemption Price.

                  (d) Certificate  Surrender;  Payment of Redemption Price. From
and after the Redemption  Price, the Company shall at the place specified in the
Notice of Redemption,  upon  presentation  and surrender to the Company by or on
behalf of the Holder thereof of the Warrant certificate,  deliver or cause to be
delivered to or upon the written  order of the Holder a sum in cash equal to the
Redemption  Price of this Warrant.  From and after the Redemption  Date and upon
the deposit or setting  aside by the Company of a sum  sufficient to redeem this
Warrant,  this Warrant shall expire and become void and all rights hereunder and
under the  Warrant  certificate,  except  the right to  receive  payment  of the
Redemption Price, shall cease.

                  (e) Target Price Adjustment. If the Exercise Price is adjusted
pursuant to Section 5 hereof,  then the Target  Price  shall be  correspondingly
adjusted  so that  there  shall  remain a $2.00  (or  $3.00 in the case that the
Common Stock is then  reported in the  over-the-counter  market in the so-called
"pink sheets" or the "OTC Bulletin  Board  Service")  spread  between the Target
Price and the Exercise Price.

         10.  Notices.  All notices  required or permitted to be given hereunder
shall be in  writing  and shall be deemed  to have  been (a) when  received,  if
delivered  in  person;  (b)  when  sent,  if  sent by  electronically  confirmed
facsimile  transmission;  or (c) five  Business (5) Days  following  the mailing
thereof,  if mailed by  certified  first class  mail,  postage  prepaid,  return
receipt  request,  in any such case as to the  following  addresses or facsimile
transmission numbers:

                        If to the Company, to:

                        Symbollon Corporation
                        37 Loring Drive
                        Framingham, Massachusetts 01702
                        Attention:  Paul C. Desjourdy, Executive Vice President
                        Telephone: (508) 620-7676
                        Telecopier: (508) 620-7111

                         With a copy to:

                         Rubin Baum Levin Constant & Friedman
                         30 Rockefeller Plaza
                         New York, New York  10012
                         Attention:  Norman Alpert, Esq.

<PAGE>

                         Telephone: (212) 698-7847
                         Telecopier:  (212) 698-7825

If to the Holder, to the address and facsimile  transmission number set forth on
the first page  hereof,  or in either  case to such  other  address as the party
shall have furnished in accordance with the Paragraph 9(b) hereof.

         10.  Supplements  and  Amendments.  The  Company  may from time to time
supplement or amend this Warrant  without the approval of the Holder in order to
cure any ambiguity or to correct or supplement  any provision  contained  herein
which may be defective or inconsistent with any other provision,  or to make any
other provisions in regard to matters or questions  herein or arising  hereunder
which the Company may deem necessary or desirable and which shall not materially
adversely affect the interests of the Holder  hereunder.  Otherwise this Warrant
may be  amended or any of its  provisions  waived  only by a written  consent or
consents  executed  by the  Company  and  Holders  of a  majority  of  the  then
outstanding  unexercised Warrants. Any amendment or waiver shall be binding upon
all existing and future Holders.

         11 Lost,  Stolen  or  Mutilated  Warrants.  Upon  receipt  of  evidence
satisfactory to the Company of the loss, theft, destruction or mutilation of any
Warrant (and upon surrender of any Warrant if mutilated), and upon reimbursement
of  the  Company's  reasonable  incidental  expenses  and  indemnity  reasonably
satisfactory to the Company, the Company shall execute and deliver to the Holder
thereof a new Warrant of like date, tenor and denomination.

         12 Successors  and Assigns.  This Warrant shall inure to the benefit of
and be  binding  on the  respective  successors,  permitted  assigns  and  legal
representatives of the Holder and the Company.

         13  Severability.  If for  any  reason  any  provision  or term of this
Warrant is held to be  invalid  or  unenforceable,  all other  valid  provisions
herein  shall  remain in full force and effect and all terms and  provisions  of
this Warrant shall be deemed to be severable.

         14 Governing  Law.  This Warrant  shall be governed by and construed in
accordance with the laws of The Commonwealth of Massachusetts  without regard to
its conflict of laws provisions.



<PAGE>


         15 Headings.  Section and  Paragraph  headings used herein are included
herein for  convenience of reference only and shall not affect the  construction
of this Warrant nor constitute a part of this Warrant for any other purpose.

                  IN WITNESS WHEREOF,  the Company has caused this Warrant to be
duly executed as of the date and year first above written.


                                  SYMBOLLON CORPORATION



                                  By:_____________________________________
                                     Paul C. Desjourdy, Executive Vice President


<PAGE>


                                                                      EXHIBIT A

                           NOTICE OF WARRANT EXERCISE


         Pursuant  to a Warrant  issued by  Symbollon  Corporation,  a  Delaware
corporation (the "Company"), to the undersigned dated as of August 10, 1999, the
undersigned  hereby  irrevocably elects to exercise its warrant to the extent of
purchasing  _______________  shares  of  Class A  Common  Stock  (the  "Exercise
Shares") of the Company as provided for therein.

         The undersigned  hereby  represents and agrees that the Exercise Shares
purchased pursuant hereto are being purchased for investment and not with a view
to the distribution or resale thereof, and that the undersigned understands that
said Exercise Shares have not been registered  under the Securities Act of 1933,
as amended.

         Payment of the full purchase  price of the Exercise  Shares is enclosed
herewith,  in the form of a  certified  or  cashiers  check made  payable to the
Company,  or has been wired, in the form of immediately  available  funds, to an
account designated by the Company.

         The undersigned  requests that a certificate for the Exercise Shares be
issued in the name of:


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

             (Please print name, address and social security number)

and,  if said  number of shares  shall not be all the number of shares of Common
Stock purchasable  hereunder,  that a new Warrant certificate for the balance of
the number of shares of Common Stock


<PAGE>


 purchasable  under the Warrant be registered in the name of the undersigned and
 delivered to the address set forth under the undersigned's signature below.

Date:_________________________________

Name of Warrantholder (or
         registered assignee): ________________________
                                            (Please Print)

Address:
        ----------------------------------------
        ----------------------------------------
        ----------------------------------------

Signature:______________________________________


Note: The above signature must correspond with the name as written upon the face
of the Warrant in every  particular,  without  alteration or  enlargement or any
change  whatever  unless this  Warrant  has been  assigned on the records of the
Company.


<PAGE>


                                                                     EXHIBIT B


                                   ASSIGNMENT


(To be signed only upon assignment of Warrant)

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto

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

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

          (Name and Address of Assignee Must be Printed or Typewritten)



the   within   Warrant,   hereby   irrevocably   constituting   and   appointing
____________________  Attorney  to  transfer  said  Warrant  on the books of the
Company, with full power of substitution in the premises.


Dated:  _______, ____      __________________________________
                           Signature of Registered Holder

                                    Notice:  The above signature must correspond
                                             with the name as  written  upon the
                                             face   of   the   within    Warrant
                                             certificate  in  every  particular,
                                             without  alteration or  enlargement
                                             or any change whatever.






<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONDENSED  UNAUDITED  FINANCIAL STATEMENT OF SYMBOLLON  CORPORATION FOR THE NINE
MONTHS ENDED SEPTEMBER 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENT AS FILED IN THE FORM 10-QSB.
</LEGEND>
<MULTIPLIER>                                  1

<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   SEP-30-1999
<CASH>                                         2,424,378
<SECURITIES>                                           0
<RECEIVABLES>                                    220,972
<ALLOWANCES>                                           0
<INVENTORY>                                      148,982
<CURRENT-ASSETS>                               2,975,243
<PP&E>                                           286,732
<DEPRECIATION>                                   186,962
<TOTAL-ASSETS>                                 3,295,174
<CURRENT-LIABILITIES>                            583,116
<BONDS>                                                0
                            175,000
                                            0
<COMMON>                                           3,962
<OTHER-SE>                                     2,537,058
<TOTAL-LIABILITY-AND-EQUITY>                   3,295,174
<SALES>                                          294,600
<TOTAL-REVENUES>                               1,332,351
<CGS>                                            204,357
<TOTAL-COSTS>                                          0
<OTHER-EXPENSES>                               1,298,993
<LOSS-PROVISION>                                       0
<INTEREST-EXPENSE>                                     0
<INCOME-PRETAX>                                 (417,399)
<INCOME-TAX>                                           0
<INCOME-CONTINUING>                             (417,399)
<DISCONTINUED>                                         0
<EXTRAORDINARY>                                        0
<CHANGES>                                              0
<NET-INCOME>                                    (417,399)
<EPS-BASIC>                                       (.14)
<EPS-DILUTED>                                       (.14)




</TABLE>


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