1 Exhibit 10.21C LOAN MODIFICATION AGREEMENT This Loan Modification Agreement is entered into as of August 30, 1999, by and between Sonus Pharmaceuticals, Inc. ("Borrower") and Silicon Valley Bank ("Silicon"). 1. DESCRIPTION OF EXISTING INDEBTEDNESS:...21c Loan Modification Agreement • February 29th, 2000 • Sonus Pharmaceuticals Inc • In vitro & in vivo diagnostic substances
