64532-81-6 L-Arginine, N2-(N-(4-(phenylazo)benzoyl)glycyl)-, methyl ester, monohydrochloride, (E)- Phenylazobenzoyl-gly-arg methyl ether Phenylazobenzoylglycine-arginine methyl ether Phenylazobenzoylglycylarginine methyl ether