(S)-2-(2-Acetamido-4-methylvaleramido)-N-(1-formyl-4-guanidinobutyl)-4-methyl-valeramide 55123-66-5 Valeramide, 2-(2-acetamido-4-methylvaleramido)-N-(1-formyl-4-guanidinobutyl)-4-methyl- (S)-