methyl (2S)-1-[(4-chlorophenyl)methyl]-5-oxopyrrolidine-2-carboxylate

5-氧代吡咯烷-2-羧胺

methyl (S,Z)-5-(2-(benzyloxy)-2-oxoethylidene)pyrrolidine-2-carboxylate

methyl (S)-1-benzoyl-2-oxopyrrolidine-5-carboxylate

(-)-(5S)-5-{[(tert-butyldiphenylsilyl)oxy]methyl}-1-tosylpyrrolidin-2-one