英文别名Levetiracetam-1; Levetiracetam S-Carboxylic Acid; (S)-2-(2-Oxo-Pyrrolidin-1-yl)-Butyric Acid; S,2-Ethyl 2-oxo pyrolidine acetic acid; (S)-2-(2-oxopyrrolidin-1-yl)-2-butanoic acid; Levetiracetam Carboxylic Acid; Levetiracetam impurity A; (2S)-2-(2-Oxo-1-pyrrolidinyl)butanoic acid; Levetiracetam Impurity 1