Boc-Arg(NO2)-Pro-Lys(Boc)-Pro-OH 生成 (2S)-1-[(2S)-2-[[(2S)-1-[(2S)-5-(diaminomethylideneamino)-2-[(2-methylpropan-2-yl)oxycarbonylamino]pentanoyl]pyrrolidine-2-carbonyl]amino]-6-[(2-methylpropan-2-yl)oxycarbonylamino]hexanoyl]pyrrolidine-2-carboxylic acid