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发明人王建平,高志强,朱建伟. "Method for the Synthesis of Levetiracetam EP Impurity A" [P]. 中国发明专利, 专利号 CN 111184978 B, 授权公告日 2019-02-01.
Schröder R, O'Brien P Q, Davis P L. "A Process for Preparing High-Purity Levetiracetam EP Impurity A" [P]. US Patent, US 10559104 B2, 2019-04-20.
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