发明人张德明,陈志强,郑宇鹏. "一种去氢孕酮EP杂质C的合成方法" [P]. 中国发明专利, 专利号 CN 115767983 A, 授权公告日 2017-10-14.
发明人杨光,黄志刚,何建平. "Method for the Synthesis of Dydrogesterone EP Impurity C" [P]. 中国发明专利, 专利号 CN 108638685 B, 授权公告日 2017-08-28.
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