(2S,4S)-4-acetylthio-2-[(3 S)-3-[2-[2,3-bis(4-nitrobenzyloxycarbonyl)guanidino]acetylamino]pyrrolidin-1-ylcarbonyl]-1-methylpyrrolidine 、 生成 (1R,5S,6S)-2-[(2S,4S)-2-[(3S)-3-[2-[2,3-bis(4-nitrobenzyloxycarbonyl)guanidine]acetylamino]pyrrolidin-1-ylcarbonyl]-1-methylpyrrolidin-4-ylthio]-6-[(1R)-1-hydroxyethyl]-1-methyl-1-carbapen-2-em-3-carboxylic acid 4-nitrobenzyl ester