-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, FCy5CFwUv+bCH5CRWDlwDsxXfpUhtXErHyBHj9oH0JEG1CrMFsa4CeFpRwB3j2G1 XxpaLOd52yQteabk/hYvPg== 0001047469-03-000508.txt : 20030107 0001047469-03-000508.hdr.sgml : 20030107 20030107144231 ACCESSION NUMBER: 0001047469-03-000508 CONFORMED SUBMISSION TYPE: SC 13D/A PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20030107 GROUP MEMBERS: ROBERT & LOIS WEINSTEIN FAMILY FOUNDATION, INC. GROUP MEMBERS: ROBERT AND LOIS WEINSTEIN JOIN REVOCABLE TRUST GROUP MEMBERS: ROBERT J. WEINSTEIN, M.D. (AS CO-MANAGER OF STRO) GROUP MEMBERS: W.F. INVESTMENTS ENTERPRISES, LIMITED PARTNERSHIP SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: PHOTOGEN TECHNOLOGIES INC CENTRAL INDEX KEY: 0000761237 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 364010347 STATE OF INCORPORATION: NV FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13D/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-53647 FILM NUMBER: 03506431 BUSINESS ADDRESS: STREET 1: 7327 OAK RIDGE HIGHWAY STREET 2: SUITE B CITY: KNOXVILLE STATE: TN ZIP: 37931 BUSINESS PHONE: 4237694011 MAIL ADDRESS: STREET 1: 7327 OAK RIDGE HIGHWAY STREET 2: SUITE B CITY: KNOXVILLE STATE: TN ZIP: 37931 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: WEINSTEIN ROBERT J MD CENTRAL INDEX KEY: 0001124823 FILING VALUES: FORM TYPE: SC 13D/A BUSINESS ADDRESS: STREET 1: C/O PHOTOGEN TECHNOLOGIES INC STREET 2: 7327 OAK RIDGE HIGHWAY CITY: KNOXVILLE STATE: TN ZIP: 37931 BUSINESS PHONE: 8657694011 MAIL ADDRESS: STREET 1: C/O PHOTOGEN TECHNOLOGIES INC STREET 2: 7327 OAK RIDGE HIGHWAY CITY: KNOXVILLE STATE: TN ZIP: 37931 SC 13D/A 1 a2097148zsc13da.htm SC 13D/A
QuickLinks -- Click here to rapidly navigate through this document

INFORMATION REQUIREMENTS FOR FILINGS UPON ACQUISITION
OF FIVE PERCENT OF A CLASS OF EQUITY SECURITIES SUBJECT
TO THE REPORTING REQUIREMENTS OF THE 1934 ACT

SCHEDULE 13D

UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)*

PHOTOGEN TECHNOLOGIES, INC.
(Name of Issuer)

COMMON STOCK
(Title of Class of Securities)

71932A-10-1
(CUSIP Number)

Robert J. Weinstein, M.D.
875 North Michigan Avenue, Suite 2930, Chicago, Illinois 60611 (312/397-2626)
(Name, Address and Telephone Number of Person Authorized to Receive
Notices and Communications)

October 16, 2002
(Date of Event Which Requires Filing of this Statement)

        If the person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(b)(3) or (4), check the following box o.

        NOTE: Six copies of this statement, including all exhibits, should be filed with the Commission. See Rule 13d-1(a) for other parties to whom copies are to be sent.

        * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a proper cover page.

        The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 71932A-10-1    

(1)   Names of Reporting Persons.
S.S. or I.R.S. Identification Nos. of Above Persons

 
 
Robert J. Weinstein, M.D. and Lois Weinstein (joint tenants)
(2)   Check the Appropriate Box if a Member of a Group (See Instructions)   (a)   ý
                (b)   o
(3)   SEC Use Only

 
 
 
 
 
 
 
 
 
 
 
(4)   Source of Funds (See Instructions)

 
 
PF
(5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e)

 
 
 
 
 
 
 
 
 
 
o
(6)   Citizenship or Place of Organization

 
 
United States
Number of Shares   (7)   Sole Voting Power
Beneficially Owned by
Each Reporting Person With		       450,000(A)
       
    (8)   Shared Voting Power

 
 
 
 
0(A)
       
        (9)   Sole Dispositive Power

 
 
 
 
 
 
450,000(A)
       
        (10)   Shared Dispositive Power

 
 
 
 
 
 
0
(11)   Aggregate Amount Beneficially Owned By Each Reporting Person

 
 
450,000(A)
(12)   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)

 
 
 
 
 
 
 
 
 
 
ý(A)
(13)   Percent of Class Represented by Amount in Row (11)

 
 
1.2%
(14)   Type of Reporting Person (See Instructions)

 
 
IN
(A)
Reporting Persons disclaim beneficial ownership of shares owned by persons other than themselves who are parties to an Amended and Restated Voting Agreement. See description of Amended and Restated Voting Agreement in Item 4, below.

2

CUSIP No. 71932A-10-1    

(1)   Names of Reporting Persons.
S.S. or I.R.S. Identification Nos. of Above Persons

 
 
Robert & Lois Weinstein Family Foundation, Inc.
(2)   Check the Appropriate Box if a Member of a Group (See Instructions)   (a)   ý
                (b)   o
(3)   SEC Use Only

 
 
 
 
 
 
 
 
 
 
 
(4)   Source of Funds (See Instructions)

 
 
PF
(5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e)

 
 
 
 
 
 
 
 
 
 
o
(6)   Citizenship or Place of Organization

 
 
Illinois
Number of Shares   (7)   Sole Voting Power
Beneficially Owned by
Each Reporting Person With		       78,000(A)
       
    (8)   Shared Voting Power

 
 
 
 
0(A)
       
        (9)   Sole Dispositive Power

 
 
 
 
 
 
78,000(A)
       
        (10)   Shared Dispositive Power

 
 
 
 
 
 
0
(11)   Aggregate Amount Beneficially Owned By Each Reporting Person

 
 
78,000(A)
(12)   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)

 
 
 
 
 
 
 
 
 
 
ý(A)
(13)   Percent of Class Represented by Amount in Row (11)

 
 
0.2%
(14)   Type of Reporting Person (See Instructions)

 
 
CO
(A)
Reporting person disclaims beneficial ownership of shares owned by persons other than it who are parties to an Amended and Restated Voting Agreement. See description of Amended and Restated Voting Agreement in Item 4, below.

3

CUSIP No. 71932A-10-1    

(1)   Names of Reporting Persons.
S.S. or I.R.S. Identification Nos. of Above Persons

 
 
W.F. Investments Enterprises, Limited Partnership
(2)   Check the Appropriate Box if a Member of a Group (See Instructions)   (a)   ý
                (b)   o
(3)   SEC Use Only

 
 
 
 
 
 
 
 
 
 
 
(4)   Source of Funds (See Instructions)

 
 
OO
(5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e)

 
 
 
 
 
 
 
 
 
 
o
(6)   Citizenship or Place of Organization

 
 
Georgia
Number of Shares   (7)   Sole Voting Power
Beneficially Owned by
Each Reporting Person With		       1,400,170(A)
       
    (8)   Shared Voting Power

 
 
 
 
0(A)
       
        (9)   Sole Dispositive Power

 
 
 
 
 
 
1,400,170(A)
       
        (10)   Shared Dispositive Power

 
 
 
 
 
 
0
(11)   Aggregate Amount Beneficially Owned By Each Reporting Person

 
 
1,400,170(A)
(12)   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)

 
 
 
 
 
 
 
 
 
 
ý(A)
(13)   Percent of Class Represented by Amount in Row (11)

 
 
3.6%
(14)   Type of Reporting Person (See Instructions)

 
 
PN
(A)
Reporting person disclaims beneficial ownership of shares owned by persons other than it who are parties to an Amended and Restated Voting Agreement. See description of Amended and Restated Voting Agreement in Item 4, below.

4

CUSIP No. 71932A-10-1    

(1)   Names of Reporting Persons.
S.S. or I.R.S. Identification Nos. of Above Persons

 
 
Robert and Lois Weinstein Joint Revocable Trust
(2)   Check the Appropriate Box if a Member of a Group (See Instructions)   (a)   ý
                (b)   o
(3)   SEC Use Only

 
 
 
 
 
 
 
 
 
 
 
(4)   Source of Funds (See Instructions)

 
 
OO
(5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e)

 
 
 
 
 
 
 
 
 
 
o
(6)   Citizenship or Place of Organization

 
 
 
Number of Shares   (7)   Sole Voting Power
Beneficially Owned by
Each Reporting Person With		       1,499,251(A)
       
    (8)   Shared Voting Power

 
 
 
 
0(A)
       
        (9)   Sole Dispositive Power

 
 
 
 
 
 
1,499,251(A)
       
        (10)   Shared Dispositive Power

 
 
 
 
 
 
0
(11)   Aggregate Amount Beneficially Owned By Each Reporting Person

 
 
1,499,251(A)
(12)   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)

 
 
 
 
 
 
 
 
 
 
ý(A)
(13)   Percent of Class Represented by Amount in Row (11)

 
 
3.9%
(14)   Type of Reporting Person (See Instructions)

 
 
OO
(A)
Reporting person disclaims beneficial ownership of shares owned by persons other than it who are parties to an Amended and Restated Voting Agreement. See description of Amended and Restated Voting Agreement in Item 4, below.

5

CUSIP No. 71932A-10-1    

(1)   Names of Reporting Persons.
S.S. or I.R.S. Identification

 
 
Robert J. Weinstein, M.D. (as co-manager of STRO, LLC which is the manager of Tannebaum, LLC)
(2)   Check the Appropriate Box if a Member of a Group (See Instructions)   (a)   ý
                (b)   o
(3)   SEC Use Only

 
 
 
 
 
 
 
 
 
 
 
(4)   Source of Funds (See Instructions)

 
 
OO
(5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e)

 
 
 
 
 
 
 
 
 
 
o
(6)   Citizenship or Place of Organization

 
 
United States
Number of Shares   (7)   Sole Voting Power
Beneficially Owned by
Each Reporting Person With		       0(A)
       
    (8)   Shared Voting Power

 
 
 
 
4,116,921(A)
       
        (9)   Sole Dispositive Power

 
 
 
 
 
 
0
       
        (10)   Shared Dispositive Power

 
 
 
 
 
 
4,116,921(A)
(11)   Aggregate Amount Beneficially Owned By Each Reporting Person

 
 
4,116,921(A)
(12)   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)

 
 
 
 
 
 
 
 
 
 
ý(A)
(13)   Percent of Class Represented by Amount in Row (11)

 
 
10.6%
(14)   Type of Reporting Person (See Instructions)

 
 
OO
(A)
Reporting person is co-manager of STRO, LLC which is the sole manager of Tannebaum, LLC and may be deemed to control Tannebaum, LLC. Dr. Weinstein disclaims beneficial ownership of Tannebaum, LLC's shares for all other purposes.

6


Item 1.    SECURITY AND ISSUER.

        This Schedule 13D relates to common stock ("Common Stock") of Photogen Technologies, Inc., a Nevada corporation (the "Issuer"). The principal executive offices of the Issuer are located at 140 Union Square Drive, New Hope, Pennsylvania 18938.

Item 2.    IDENTITY AND BACKGROUND.

        Set forth below is the following information with respect to the person filing this Schedule 13D: (a) name; (b) business address; (c) principal occupation and name, business and address of employer; (d) information concerning criminal convictions during the last five years; (e) information concerning civil or administrative proceedings under state or federal securities laws during the past five years with respect to any state or federal securities laws; and (f) citizenship.

I.

    a)
    Robert J. Weinstein and Lois Weinstein (joint tenants)

    b)
    875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    c)
    Director, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    d)
    No criminal convictions (1)

    c)
    No adverse civil judgments for violations of securities laws (1)

    f)
    United States

II.

    a)
    Robert and Lois Weinstein Family Foundation, Inc. (Robert Weinstein, President)

    b)
    c/o Robert J. Weinstein, M.D., 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    c)
    Not-for-profit corporation formed for investment purposes, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    d)
    No criminal convictions (1)

    e)
    No adverse civil judgments for violations of securities laws (1)

    f)
    Illinois

III.

    a)
    W.F. Investments Enterprises, Limited Partnership (Robert J. Weinstein, General Partner)

    b)
    c/o Robert J. Weinstein, M.D., 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    c)
    Investment partnership, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    d)
    No criminal convictions (1)

    e)
    No adverse civil judgments for violations of securities laws (1)

    f)
    Illinois

IV.

    a)
    Robert and Lois Weinstein Joint Revocable Trust (Robert and Lois Weinstein, Trustees)

    b)
    c/o Dr. Robert Weinstein, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    c)
    Revocable Trust, c/o Dr. Robert Weinstein, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    d)
    No criminal convictions (1)

    e)
    No adverse civil judgments for violations of securities laws (1)

    f)
    United States

7

V.

    a)
    Robert J. Weinstein (as co-manager of STRO, LLC which is the sole manager of Tannebaum, LLC)

    b)
    875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    c)
    Co-Manager, 875 North Michigan Avenue, Suite 2930, Chicago, IL 60611

    d)
    No criminal convictions (1)

    e)
    No adverse civil judgments for violations of securities laws (1)

    f)
    United States

        (1) During the last five years, neither the filing person nor any person described in General Instruction C to Schedule 13D with respect to a filing person that is an entity has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors), nor have such persons been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction that resulted in his becoming subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.


Item 3    SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

        Dr. Weinstein and his wife acquired 3,239,350 shares of Common Stock on December 9, 1994 from the Issuer in a private transaction (adjusted to reflect a subsequent two-for-one reverse stock split). The purchase price was $.0231528 per share, which Dr. Weinstein and his wife paid with their personal funds.

        On May 16, 1997, the Issuer sold 2,975,359 shares of Common Stock to Dr. and Mrs. Weinstein in a private transaction. The purchase price was $.28568 per share, which Dr. Weinstein and his wife paid with their personal funds. (These purchases were part of a stockholder restructuring in which Dr. Weinstein and his wife transferred 2,714,288 shares to the Issuer's treasury for cancellation.) Subsequently, Dr. Weinstein and his wife conveyed 1,400,170 shares of Common Stock of the Issuer to the W.F. Investments Enterprises Limited Partnership, a family partnership and 100,000 shares of Common Stock of the Issuer to the Robert and Lois Weinstein Family Foundation, Inc., a not-for-profit corporation, both of which are jointly controlled by Dr. and Mrs. Weinstein. Dr. and Mrs. Weinstein retain beneficial of all the shares held by the family foundation and the limited partnership. In June 1997, the reporting persons gifted a total of 45,000 shares of Issuer's Common Stock to various third parties.

        The reporting persons have transferred a portion of their shares to various entities controlled by them or disposed of certain shares to third parties by gift or sale. In August 1999, Dr. and Mrs. Weinstein conveyed 1,505,251 shares of Issuer's Common Stock to the Robert and Lois Weinstein Joint Revocable Trust, a revocable trust, which is jointly controlled by Dr. and Mrs. Weinstein. In August 2000, the reporting persons gifted 6,000 shares of Issuer's Common Stock to various third parties. In December 2001, the Robert & Lois Weinstein Family Foundation, Inc. gifted 22,000 shares of Issuer's Common Stock to a third party.

        The purpose of Amendment No. 1 was to report the beneficial interest of Dr. Weinstein in Tannebaum, LLC.

        The purpose of this Amendment No. 2 is to report the call options that were granted by Tannebaum, LLC to STRO, LLC and Tannebaum Ventures LLC.


Item 4.    PURPOSE OF TRANSACTION.

        The reporting persons previously filed Schedule 13Ds on February 25, 1998, May 12, 1998, July 27, 1998 and December 30, 1998 as members of a "group" pursuant to Section 13(d) of the Securities Exchange Act of 1934 and Rule 13d-3. The members of the group are now filing individually pursuant to Rule 13(d)-1(k)(1)(i).

        All shares of Common Stock of Issuer received by Tannebaum, LLC were acquired for its own account for investment purposes.

        The shares of Common Stock beneficially owned by the reporting persons are subject to an Amended and Restated Voting Agreement (which was attached as an Exhibit to Amendment No. 2 to Schedule 13D dated July 27, 1998) and further amended by Amendment No. 1 to Amended and Restated Voting Agreement on September 30, 1999 which is attached hereto as Exhibit No. 2 (the "Amended Agreement"). The Amended Agreement was entered into among Eric Wachter, Ph.D., Craig Dees, Ph.D., Walter Fisher, Ph.D., Tim Scott,

8


Ph.D., and John Smolik (the "Tennessee Stockholders") and Robert Weinstein, M.D. (the "Chicago Stockholder"). The Amended Agreement generally provides that the Tennessee Stockholders and Chicago Stockholder will vote shares of Common Stock beneficially owned by them (i) in accordance with the unanimous recommendation of the Board of Directors and with respect to any amendments to the Articles of Incorporation or Bylaws, (ii) to fix the number of directors at seven, (iii) to elect to the Board of Directors five persons nominated by holders of 80% of the shares of the Tennessee Stockholders and two persons nominated by holders of 80% of the shares of the Chicago Stockholder (and to remove any such director at the request of the stockholders who nominated him), and (iv) to fix the number of directors on the Board's Executive Committee at three, two of whom will be selected by the Tennessee Stockholders and one of whom will be selected by the Chicago Stockholder. Accordingly, the parties to the Amended and Restated Voting Agreement may be deemed to share voting power with respect to their shares. The reporting persons disclaims beneficial ownership of all shares owned by Mr. Smolik, Drs. Dees, Fisher, Scott and Wachter.

        The Issuer has agreed to split off its photodynamic therapy and laser device business to five founding shareholders in exchange for all their Common Stock, which represents 52.9% of the Issuer's outstanding shares. The reporting persons have agreed to vote their shares in favor of that transaction.

        The Issuer has also signed an amended financing agreement to sell between $9,000,000 and $15,000,000 worth of Common Stock to a group of venture capital funds led by Mi3 L.P. of Wellesley, MA and including Tannebaum, LLC and Oxford Bioscience Partners IV L.P. The reporting persons have agreed to vote their shares in favor of that transaction. The financing agreements include a voting agreement pursuant to which (among other things) the reporting persons agree to maintain the Issuer's Board of Directors at seven members and to vote to elect certain persons to the Board.

        On October 16, 2002, Tannebaum, LLC signed a Call Agreement granting call options to STRO, LLC and Tannebaum Ventures LLC.

        Except as described above, no reporting person has any current plans or proposals that relate to or would result in:

    a.
    The acquisition of additional securities of the Issuer, or the disposition of securities of the Issuer;

    b.
    An extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries;

    c.
    A sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries;

    d.
    Any change in the present board of directors or management of the Issuer, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the board;

    e.
    Any material change in the present capitalization or dividend policy of the Issuer;

    f.
    Any other material change in the Issuer's business or corporate structure;

    g.
    Changes in the Issuer's charter, bylaws or instruments corresponding thereto or other actions which may impede the acquisition of control of the Issuer by any person;

    h.
    Causing a class of securities of the Issuer to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association;

    i.
    A class of equity securities of the Issuer becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Exchange Act; or

    j.
    Any action similar to any of those enumerated above.

9


Item 5.    INTEREST IN SECURITIES OF THE ISSUER.

Name of Item or Person
   Common Stock Beneficially Owned
   % of Class(1)
   Voting Power
  

Robert J. Weinstein, M.D. and Lois Weinstein (joint tenants)
 
450,000
(2)
1.2
%
Sole
(3)
Robert and Lois Weinstein Family Foundation, Inc.   78,000 (2) .2 % Sole (3)
W.F. Investments Enterprises, Limited Partnership   1,400,170 (2) 3.6 % Sole (3)
Robert and Lois Weinstein Joint Revocable Trust   1,499,251 (2) 3.9 % Sole (3)
Robert J. Weinstein, M.D. (as co-manager of STRO, LLC)   4,116,921 (4) 10.6 % Shared (4)
(1)
All percentages in this table are based, pursuant to Rule 13d-1(e) of the Securities Exchange Act of 1934, on the 38,842,298 shares of Common Stock of the Issuer outstanding as of June 30, 2002.

(2)
Excludes shares of Common Stock owned by other persons that are subject to the Amended and Restated Voting Agreement described in Item 4, above.

(3)
Common Stock owned by the reporting person is subject to the Amended and Restated Voting Agreement described in Item 4, above.

(4)
Excludes shares of Common Stock owned by other persons that are subject to the voting agreement related to the financing transaction described in Item 4, above.


Item 6.    CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER.

        The Amended and Restated Voting Agreement, the split off transaction, the financing transaction and related voting agreement, and the call agreement with the reporting person are described in Item 4, above. There are no other contracts, arrangements or understandings among any Item 2 person made or entered into specifically with respect to holding, voting or disposing of the Common Stock of the Issuer.


Item 7.    MATERIAL TO BE FILED AS EXHIBITS.

The following exhibits are filed with this Schedule 13D:

1.
Original Amended and Restated Voting Agreement entered into as of June 17, 1998 by and among Eric A. Wachter, Ph.D., Craig Dees, Ph.D., Walter Fisher, Ph.D., Tim Scott, Ph.D., John Smolik and Robert J. Weinstein, M.D. (incorporated by reference to Exhibit 2 of Amendment No. 2 to the Schedule 13D filing dated July 27, 1998).

2.
Amendment No. 1 to Amended and Restated Voting Agreement entered into as of September 30, 1999 by and among Eric A. Wachter, Ph.D., Craig Dees, Ph.D. Walter G. Fisher, Ph.D., Tim Scott, Ph.D., John Smolik and Robert J. Weinstein and joined into by Photogen Technologies, Inc. (incorporated by reference to Exhibit 2 to the Schedule 13D filing dated October 12, 2000).

3.
Amended and Restated Standby Agreement by and between Theodore Tannebaum, John T. Smolik, as President of the Issuer and individually, Craig Dees, Ph.D., Walter G. Fisher, Ph.D., Timothy Scott and Eric A. Wachter, Ph.D., dated November 9, 1999 (incorporated by reference to Exhibit 10.34 to the Form 10-KSB filing dated March 29, 2000).

4.
Separation Agreement entered into as of July 29, 2002 by and among the following: Craig Dees, Ph.D. and Dees Family Foundation, Eric A. Wachter, Ph.D. and Eric A. Wachter 1998 Charitable Remainder Unitrust, Timothy D. Scott, Ph.D. and Scott Family Investment Limited Partnership, Walter Fisher, Ph.D., Fisher Family Investment Limited Partnership, and Walt Fisher 1998 Charitable Remainder Unitrust, and John A. Smolik and Smolik Family LLP, Photogen Technologies, Inc., Photogen, Inc., Robert J. Weinstein, M.D., Stuart P. Levine and Tannebaum, LLC (incorporated by reference to Schedule A to the DEFM 14A filing dated September 12, 2002).

5.
Common Stock Purchase Agreement dated as of August 2, 2002 entered into by and among Photogen Technologies, Inc., Mi3 L.P., Oxford Bioscience Partners IV L.P., New England Partners Capital, L.P. and Tannebaum, LLC (incorporated by reference to Schedule C to the DEFM 14A filing dated September 12, 2002).

10

6.
Amendment No. 1 to the Common Stock Purchase Agreement dated as of August 2, 2002 entered into by and among Photogen Technologies, Inc., Mi3 L.P., Oxford Bioscience Partners IV L.P., New England Partners Capital, L.P. and Tannebaum, LLC (incorporated by reference to Exhibit A to the DEFR 14A filing dated October 18, 2002).

7.
Voting, Drag-Along and Right of First Refusal Agreement by and among Robert J. Weinstein, M.D. (individually and as Director of the Robert and Lois Weinstein Family Foundation, Inc. and as Trustee of the Robert and Lois Weinstein Joint Revocable Trust), Stuart Levine (individually and as Trustee of the Theodore Tannebaum Trust), Tannebaum, LLC, Mi3 L.P., Oxford Bioscience and New England Partners Capital, L.P. (incorporated by reference to Schedule G to the DEFM 14A filing dated September 12, 2002).

8.
Call Agreement entered into as of October 16, 2002 by and among Tannebaum, LLC, STRO, LLC and Tannebaum Ventures LLC (filed hereto as Exhibit A).

11


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.

Dated: October 16, 2002  

 
/s/  ROBERT J. WEINSTEIN      
Robert J. Weinstein, M.D., on his own behalf, as General Partner of the W.F. Investment Enterprises Limited Partnership, as Director of the Robert and Lois Weinstein Family Foundation, Inc., as Trustee of the Robert and Lois Weinstein Joint Revocable Trust, and as Co-Manager of STRO, LLC (the manager of Tannebaum,  LLC)

 
/s/  LOIS WEINSTEIN      
Lois Weinstein on her own behalf and as Trustee of the Robert and Lois Weinstein Joint Revocable Trust

12



QuickLinks

SIGNATURE
 EX-99.A 3 a2097148zex-99_a.htm EX-99.A
QuickLinks -- Click here to rapidly navigate through this document


Exhibit A

PHOTOGEN CALL AGREEMENT

        This Agreement is entered into as of October 16, 2002, by and among Tannebaum, LLC ("Tannebaum"), STRO, LLC ("STRO") and Tannebaum Ventures LLC ("Ventures").

        For good and valuable consideration and intending to by legally bound, the parties agree as follows:

        1.    Call on Tannebaum.    Beginning October 25, 2002 and continuing thereafter for a period of one year, STRO shall have a Call on Tannebaum to purchase 30% of Tannebaum's Photogen Technologies, Inc. stock and Ventures shall have a Call on Tannebaum to purchase 70% of Tannebaum's Photogen Technologies Inc. stock. The phrase "Photogen Technologies Inc. stock" shall include all shares of stock of any class, any options to purchase shares of stock of any class, and the profits and proceeds of any dividends, sales or exchanges of Photogen Technologies Inc. stock from the date of this Agreement to the closing.

        2.    Call Consideration.    The consideration for this Call right shall be $10,000 payable $3,000 by STRO and $7,000 by Ventures within 30 days of the date of this Agreement. The agreed Call price shall be $.30 per share of every class of Photogen Technologies Inc. stock held by Tannebaum on the date of this Agreement. Options to purchase stock or other rights relating to stock shall be converted into the equivalent of shares of common stock on the date of this Agreement.

        3.    Exercise Provisions.    Notice of exercise of this Call right shall be made in writing to Tannebaum at any time prior to October 25, 2003. The notice shall state the time and place of the closing within 30 days of the exercise date. The Call price shall be paid in cash at the closing.

        4.    General Provisions    

            (a)  This Agreement shall be binding upon and inure to the benefit of the parties hereto and their legal representatives, heirs, legatees, successors and assigns.

            (b)  This Agreement shall be governed by and construed in accordance with the laws of the State of Illinois regarding matters of contract law without giving effect to conflict of law principles.

*                        *                         *

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first written above.

TANNEBAUM LLC  
By:   STRO, LLC  
Its:   Manager  

By:
 
/s/  ROBERT J. WEINSTEIN      
Robert J. Weinstein, M.D.
 

By:
 
/s/  STUART P. LEVINE      
Stuart P. Levine
 

STRO, LLC
 

By:
 
/s/  ROBERT J. WEINSTEIN      
Robert J. Weinstein, M.D.
 

By:
 
/s/  STUART P. LEVINE      
Stuart P. Levine
 

TANNEBAUM VENTURES LLC
 

By:
 
/s/  LOUIS D. WILLIAMS      
Louis D. Williams
 



 
 
 


QuickLinks

 -----END PRIVACY-ENHANCED MESSAGE-----