Levetiracetam Standard

(αS)-α-Ethyl-2-oxo-1-pyrrolidineacetamide; (-)-Levetiracetam;1-Pyrrolidineacetamide,a-ethyl-2-oxo-, (aS); (-)-(S)-a-Ethyl-2-oxo-1-pyrrolidineacetamide (USP);