N-benzyloxycarbonylphenylalanyl-citrulline 4-nitroanilide

N-[(benzyloxy)carbonyl]-3-phenyl-L-alanyl-N5-carbamoyl-N-(p-nitrophenyl)-L-ornithinamide

N2-[N-[(Phenylmethoxy)carbonyl]-L-phenylalanyl]-N5-(aminocarbonyl)-N-(4-nitrophenyl)-L-ornithinamide