英文别名Oxiracetam Impurity 3; Methyl (4-hydroxy-2-oxo-1-pyrrolidinyl)acetate; Methyl 4-hydroxy-2-oxopyrrolidine-1-acetate; 1-Pyrrolidineacetic acid, 4-hydroxy-2-oxo-, methyl ester; 4-Hydroxy-2-oxo-1-pyrrolidineacetic acid methyl ester; Oxiracetam Impurity II; Oxiracetam Impurity C; Oxiracetam-6; Oxiracetam Impurity VI; Oxiracetam Impurity 4 
