英文别名Piracetam Impuirty D;Piracetam EP Impurity D;2-(2-oxopyrrolidin-1-yl)acetate;(2-oxopyrrolidin-1-yl)acetic acid(SALTDATA: FREE);Piracetam Impurity 1;Piracetam Impurity 4(Piracetam EP Impurity D);2-Pyrrolidinon-1-ylacetic acid;2-(2-ketopyrrolidin-1-yl)acetic acid