1-((S)-1-羟基丁烷-2-基)吡咯烷-2-酮

(-)-(S)-alpha-ethyl-2-oxo-1-pyrrolidineacet-N-(+)-(R)-(1-phenylethyl)-amide

(S)-alpha-乙基-2-氧代-1-吡咯烷乙酸 (R)-alpha-甲基苯甲胺盐

2-吡咯烷酮

(R)-2-BROMOBUTANOIC ACID