68172-31-6 L-Arginine, N2-((phenylmethoxy)carbonyl)-, 4-nitrophenyl ester N(2)-((Phenylmethoxy)carbonyl)arginine 4-nitrophenyl ester N(2)-Benzyloxycarbonylarginine-4-nitrophenyl ester N-alpha-Carbobenzoxy-L-arginine p-nitrophenyl ester N-alpha-Carbobenzoxy-arginine p-nitrophenyl ester