5-Amino-8-guanidino-2-(4-hydroxyphenylmethyl)-4-oxooctanoic acid hydrochloride 88465-81-0 Arphamenine B Benzenepropanoic acid, alpha-(3-amino-6-((aminoiminomethyl)amino)-2-oxohexyl)-4-hydroxy-, monohydrochloride, (S-(R*,S*))- alpha-(3-Amino-6-((aminoiminomethyl)amino)-2-oxohexyl)-4-hydroxybenzenepropanoic acid