发明人徐明华,赵玉洁,李文辉. "一种屈螺酮EP杂质H的合成方法" [P]. 中国发明专利, 专利号 CN 111678424 A, 授权公告日 2017-02-10.
发明人郭海燕,韩伟,钱学锋. "Method for the Synthesis of Drospirenone EP Impurity H" [P]. 中国发明专利, 专利号 CN 108564121 A, 授权公告日 2018-09-06.
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