发明人徐明华,韩伟,马晓峰. "Method for the Synthesis of Piracetam Impurity 8" [P]. 中国发明专利, 专利号 CN 112721676 A, 授权公告日 2024-11-05.
发明人郑宇鹏,高志强,罗永刚. "A Process for Preparing High-Purity Piracetam Impurity 8" [P]. 中国发明专利, 专利号 CN 108133872 A, 授权公告日 2020-10-08.
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