Agreement to Extend First Amendment to Boston Life Sciences, Inc. Warrants for Purchase of Shares of Common Stock

Summary

Boston Life Sciences, Inc. and Pictet Global Sector Fund-Biotech have agreed to extend the deadline for the "Reset" provision in their warrant agreement. The new extension moves the deadline from June 15, 2001, to June 25, 2001. All other terms and conditions of the previous amendment and the original warrant agreement remain unchanged and in effect. The agreement was signed by authorized representatives of both parties on June 13, 2001.

EX-4.3 5 dex43.txt AGREEMENT TO EXTEND FIRST AMENDMENT Exhibit 4.3 Agreement to Extend "First Amendment to Boston Life Sciences, Inc. Warrants for Purchase of Shares of Common Stock" This agreement is meant to extend the previous "First Amendment" signed on May 27, 2001 by Mr. Yves Martignier, Pictet Global Sector Fund-Biotech, which extended the "Reset" of Pictet's Boston Life Sciences, Inc. Warrants from June 1, 2001 to June 15, 2001. The extension granted hereby will be June 25, 2001. Exactly the same provisions of the previous amendment shall apply to this extension and no other changes of any kind shall apply to the provision of the Warrants which shall remain unmodified and of full force and effect as originally set forth. Accepted and Agreed Pictet Global Sector Fund-Biotech Boston Life Sciences, Inc. /s/ Yves Martignier /s/ David Hillson - --------------------------------- --------------------------------- Yves Martignier, Director David Hillson, President & Chief Executive Officer Date: June 13, 2001 Date: June 13, 2001 --------------------------- ---------------------------