Synonyms: Butanamide, 2-amino-, monohydrochloride, (2S)- (9CI), Butanamide, 2-amino-, monohydrochloride, (S)-, Butyramide, 2-amino-, monohydrochloride, L- (8CI), (S)-(+)-2-Aminobutanamide hydrochloride, (S)-2-Aminobutanamide hydrochloride, (S)-2-Aminobutyramide hydrochloride, Levetiracetam Imp. G (EP),Butanamide, 2-amino-, hydrochloride (1:1), (2S)-, Levetiracetam Related Compound B