Synonyms: 1,2-Pyrrolidinedicarboxylicacid, 5-oxo-, 1-(phenylmethyl) ester, (S)-;1,2-Pyrrolidinedicarboxylic acid,5-oxo-, 1-benzyl ester, L- (8CI);(2S)-5-Oxopyrrolidine-1,2-dicarboxylic acid1-benzyl ester;(Benzyloxycarbonyl)-L-pyroglutamic acid;Carbobenzoxy-L-pyroglutamic acid;L-(Phenylmethoxycarbonyl)pyroglutamic acid;N-Benzyloxycarbonyl-L-pyroglutamic acid;N-Benzyloxycarbonylpyroglutamic acid;N-Carbobenzoxypyroglutamic acid;Z-Pyr-OH;