(2S,4S)-4-乙酰硫基-2-[[N-氨基磺酰基-N-(叔丁氧羰基)氨基]甲基]吡咯烷-1-甲酸对硝基苄酯 CAS:491878-06-9 C20H28N4O9S2 4-Nitrobenzyl(2S,4S)-4-acetylthio-2-[[N-sulfamoyl-N-(tert-butoxycarbonyl)-amino]methyl]pyrrolidine-1-carboxylate