156586-91-3 Ethyl (S)-3-(3-((p-amidinophenyl)carbamoyl)propionamido)-4-pentynoate monohydrochloride Pentynoic acid, 3-((4-((4-(aminoiminomethyl)phenyl)amino)-1,4-dioxobutyl)amino)-, ethyl ester, monohydrochloride, (S)- SC 54684A SC-54684A XEMILOFIBAN HYDROCHLORIDE Xemilofiban hydrochloride [USAN]