英文别名METHYL (2S,4S)-1-(TERT-BUTOXYCARBONYL)-4-METHYLPYROGLUTAMATE; (2S-cis)-1,2-Pyrrolidinedicarboxylic Acid 4-Methyl-5-oxo-1-(1,1-diMethylethyl) 2-Methyl Ester; 1,2-Pyrrolidinedicarboxylic acid, 4-methyl-5-oxo-, 1-(1,1-dimethylethyl) 2-methyl ester, (2S,4S)-; Nemonoxacin Impurity 42; 1-O-tert-butyl 2-O-methyl (2S,4S)-4-methyl-5-oxopyrrolidine-1,2-dicarboxylate; (2S,4S)-1-(1,1-dimethylethyl)-4-methyl-5-oxo-pyrrolidine-1,2-dicarboxylic acid 2-methyl ester; (2S,4S)-1-(1,1-dimethylethyl)-4-methyl-5-oxo-1,2-pyrrolidinedicarboxylic acid 2-methyl ester; methyl (2S,4S)-1-(tert-butyloxycarbonyl)-4-methylpyroglutamate; (2S,4S)-1-tert-butyl 2-methyl 4-methyl-5-oxopyrrolidine-1,2-dicarboxylate 
