138107-58-1 L-Phenylalanine, N-(N-(N-(4-(aminoiminomethyl)benzoyl)-beta-alanyl)-L-alpha-aspartyl)- N-(N-(N-(p-Amidinobenzoyl)-beta-alanyl)-L-alpha-aspartyl)-3-phenyl-L-alanine Ro 43-5054 Ro 435054 p-Amidinobenzoyl-beta-alanyl-aspartyl-phenylalanine