EXHIBIT 99.3 THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUED UPON ITS EXERCISE ARE SUBJECT TO THE RESTRICTIONS ON TRANSFER SET FORTH IN SECTION 5 OF THIS WARRANTNovelos Therapeutics, Inc. • March 3rd, 2006 • Pharmaceutical preparations • New York
EXHIBIT 99.4 December 19, 2005 Harry S. Palmin President and CEO Novelos Therapeutics, Inc. One Gateway Center, Ste 504 Newton, MA 02458 Dear Harry: 1. This letter agreement (the "Agreement") confirms our understanding that Novelos Therapeutics, Inc....Letter Agreement • March 3rd, 2006 • Novelos Therapeutics, Inc. • Pharmaceutical preparations
EXHIBIT 99.2 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement, dated on and as of the date set forth on the signature page hereto (this "Agreement"), is made among Novelos Therapeutics, Inc., a Delaware corporation (the "Company"), the...Securities Purchase Agreement • March 3rd, 2006 • Novelos Therapeutics, Inc. • Pharmaceutical preparations • New York
