发明人徐明华,刘建华,林芳. "Method for the Synthesis of Megestrol Acetate EP Impurity C" [P]. 中国发明专利, 专利号 CN 112884524 B, 授权公告日 2019-01-08.
发明人黄志刚,朱建伟,冯建国. "A Process for Preparing High-Purity Megestrol Acetate EP Impurity C" [P]. 中国发明专利, 专利号 CN 108416976 B, 授权公告日 2020-12-11.
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