发明人李文辉,刘建华,郭海燕. "一种屈螺酮EP杂质E的合成方法" [P]. 中国发明专利, 专利号 CN 115477719 A, 授权公告日 2019-11-22.
Schröder R, Sørensen M, Rossi M. "Method for the Synthesis of Drospirenone EP Impurity E" [P]. European Patent, EP 3083198 A1, 2019-02-15.
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