4-Nitrobenzyl (2S,4S)-4-acetylthio-2-[[N-sulfamoyl-N-(tert-butoxycarbonyl)amino]methyl]pyrrolidine-1-carboxylate; Doripenem side-chain; Side chain for Doripeme; 4-Nitrobenzyl(2S,4S)-4-acetylthio-2-[[N-sulfamoyl-N-(tert-butoxycarbonyl)amino]methyl]pyrrolidine-1-carboxylate; (2S,4S)-2-[N-tert-butoxycarbonyl-Sulfamoylamino methyl]-4-mecaptopyrrolidine-1-Nitrobenzyl-Carboxylate; (2S,4S)-2-N-tert-butoxycarbonyl-Sulfamoylamino methyl-4-mecaptopyrrolidine-1-Nitrobenzyl-Carboxylate; Side chain of Doripenem; Doripenem side chain; Acs-Pnz-Pyrrolidyl-(Boc)-Nso2Nh2; Side chain for Doripenem