1,2-Pyrrolidinedicarboxylic acid, 1-benzyl p-nitrophenyl ester, L- 1-Benzyl 2-(4-nitrophenyl) (S)-pyrrolidine-1,2-dicarboxylate 1-Benzyl p-nitrophenyl L-1,2-pyrrolidinedicarboxylate 3304-59-4 4-22-00-00037 (Beilstein Handbook Reference) BRN 0056776 Carbobenzyloxy-L-proline p-nitrophenyl ester EINECS 221-981-3 L-Proline, carbobenzyloxy-, p-nitrophenyl ester