(2S,4S)-4-(4-methoxybenzylthio)-1-(4-nitrobenzyloxycarbonyl)-2-pyrrolidinecarboxylic acid 、 、
2-Carbamoyl-1-(4-nitrobenzyloxycarbonyl)piperazine 以2.13 g of the title compound were obtained as an amorphous solid的产率得到(2S,4S)-2-[3-Carbamoyl-4-(4-nitrobenzyloxycarbonyl)-1-piperazinylcarbonyl]-4-mercapto-1-(4nitrobenzyloxycarbonyl)pyrrolidine