英文别名(S)-N-[1-(Aminocarbonyl)propyl]-4-chlorobutanamide; N-[(1S)-1-(Aminocarbonyl)propyl]-4-chlorobutanamide; Levetiracetam Related Compound A; Levetiracetam USP RC A; Levetiracetam Impurity E; Levetiracetam USP Related Compound A; (2S)-2-(4-chlorobutanoylamino)butanamide