英文别名Oxiracetam Impurity 7; ethyl 4-hydroxy-2-oxopyrrolidine-1-acetate; 4-Hydroxy-2-oxo-1-pyrrolidineacetic acid ethyl ester; oxiracetam related substance; Oxiracetam Impurity D; Oxiracetam IMP; Oxiracetam Impurity X; Oxiracetam Impurity IX; Oxiracetam-7; ethyl 4-hydroxy-2-oxo-1-pyrrolidineacetate; 1-Pyrrolidineacetic acid, 4-hydroxy-2-oxo-, ethyl ester; Ethyl (4-hydroxy-2-oxo-1-pyrrolidinyl)acetate; 4-hydroxy-2-oxo-pyrrolidin-1-yl ethyl acetate; Ethyl (4-hydroxy-2-oxopyrrolidin-1-yl)acetate; 4-hydroxy-pyrrolidin-2-on-1-yl ethyl acetate 
