EXHIBIT 4.1 FIRST AMENDMENT TO THE RIGHTS AGREEMENT AND CERTIFICATION OF COMPLIANCE WITH SECTION 26 THEREOF Pursuant to Section 26 of the Rights Agreement (the "Agreement") dated as May 18, 1995, between Matrix Pharmaceutical, Inc., a Delaware...Matrix Pharmaceutical Inc/De • December 23rd, 1998 • Pharmaceutical preparations
Company FiledDecember 23rd, 1998 Industry