(2S,4S)-4-(4-methoxybenzylthio)-1-(4-nitrobenzyloxycarbonyl)-2-pyrrolidinecarboxylic acid 、
乙二胺 、 N-(4-nitrobenzyloxycarbonyl)formamidine 以280 mg of the title compound were obtained as a powder的产率得到(2S,4S)-4-mercapto-2-{N-[2-(N-4-nitrobenzyloxycarbonylformimidoyl)aminoethyl]carbamoyl}-1-(4-nitrobenzyloxycarbonyl)pyrrolidine