英文别名(S)-N-((S)-5-Guanidino-1-((4-nitrophenyl)amino)-1-oxopentan-2-yl)-1-((S)-5-oxopyrrolidine-2-carbonyl)pyrrolidine-2-carboxamide; 5-Oxo-L-prolyl-L-prolyl-N-(diaminomethylene)-N-(4-nitrophenyl)-L-ornithinamide; S 2366; Pyr-PR-pNA; L-Argininamide, 5-oxo-L-prolyl-L-prolyl-N-(4-nitrophenyl)-; Pyr-Pro-Arg-pNA free base 
