<PAGE>
Page 1 of 5 Pages
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Trega Biosciences, Inc.
-----------------------
(Name of Issuer)
Common stock, $0.001 par value
------------------------------
(Title of Class of Securities)
0894699107
----------
(CUSIP Number)
August 20, 1999
-------------------------
Date of Event Which Requires Filing of this Statement
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
/ / 13d-1(b)
/X/ 13d-1(c)
/ / 13d-1(d)
<PAGE>
Page 2 of 5 Pages
SCHEDULE 13G
CUSIP No. 0894699107
1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
ChemNavigator.com, Inc. 52-2169546
- -------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) / /
- -------------------------------------------------------------------------------
3. SEC USE ONLY
- -------------------------------------------------------------------------------
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
NUMBER 5. SOLE VOTING POWER
OF 1,000,000 Shares of Common Stock
SHARES -------------------------------------------------------------
BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY EACH 0 Shares of Common Stock
REPORTING -------------------------------------------------------------
PERSON 7. SOLE DISPOSITIVE POWER
WITH 1,000,000 Shares of Common Stock
-------------------------------------------------------------
8. SHARED DISPOSITIVE POWER
0 Shares of Common Stock
- --------------------------------------------------------------------------------
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,000,000 Shares of Common Stock
- --------------------------------------------------------------------------------
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.5%
- --------------------------------------------------------------------------------
12. TYPE OF REPORTING PERSON*
CO
<PAGE>
Page 3 of 5 Pages
ITEM 1. (a) Name of Issuer:
Trega Biosciences, Inc.
(b) Address of Issuer's Principal Executive Offices:
9880 Campus Point Drive
San Diego, California 92121
ITEM 2. (a) Name of Persons Filing:
ChemNavigator.com, Inc.
(b) Address of Principal Business Office or, if none, Residence:
6166 Nancy Ridge Drive
San Diego, California 92121
(c) Citizenship:
Delaware
(d) Title of Class of Securities:
Common Stock, $0.001 par value
(e) CUSIP Number :
0894699107
ITEM 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b)
or (c), check whether the person filing is a:
(a) / / Broker or dealer registered under Section 15 of the
Exchange Act;
(b) / / Bank as defined in Section 3(a)(6) of the Exchange Act;
(c) / / Insurance company as defined in Section 3(a)(19) of the
Exchange Act;
(d) / / Investment company registered under Section 8 of the
Investment Company Act;
(e) / / An investment adviser in accordance with
Rule 13d-1(b)(1)(ii)(E);,
(f) / / An employee benefit plan or endowment fund in accordance
with Rule 13d-1(b)(1)(ii)(F);
(g) / / A parent holding company or control person in accordance
with Rule 13d-1(b)(ii)(G);
(h) / / A savings association as defined in Section 3(b) of the
Federal Deposit Insurance Act;
(i) / / A church plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the
Investment Company Act;
(j) / / Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule13d-1(c), check this
box. /X/
ITEM 4. Ownership
Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.
(a) Amount beneficially owned:
See Item 9 of cover page.
(b) Percent of class:
<PAGE>
Page 4 of 5 Pages
See Item 11 of cover page.
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote
See Item 5 of cover page.
-------------------------
(ii) Shared power to vote or to direct the vote
See Item 6 of cover page.
-------------------------
(iii) Sole power to dispose or to direct the disposition of
See Item 7 of cover page.
-------------------------
(iv) Share power to dispose or to direct the disposition of
See Item 8 of cover page.
-------------------------
ITEM 5. Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more
than five percent of the class of securities, check the following / /
ITEM 6. Ownership of More than Five Percent on Behalf of Another Person
N/A
ITEM 7. Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on By the Parent Holding Company
N/A
ITEM 8. Identification and Classification of Members of the Group
N/A
ITEM 9. Notice of Dissolution of Group
N/A
ITEM 10. Certification.
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are
not held for the purpose of or with the effect of changing or
influencing the control of the issuer of the securities and were not
acquired and are not held in connection with or as a participant in
any transaction having that purpose of effect.
<PAGE>
Page 5 of 5 Pages
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete
and correct.
8/30/99
Date
-------------------------------
CHEMNAVIGATOR.COM, INC.
By: /s/ Richard P. Burgoon, Jr.
---------------------------
Richard P. Burgoon, Jr.
Secretary
