Roberts E F, Patel M V, Williams B T. "一种屈螺酮EP杂质I的合成方法" [P]. US Patent, US 10729056 B2, 2020-04-07.
发明人罗永刚,郭海燕,孙丽萍. "Method for the Synthesis of Drospirenone EP Impurity I" [P]. 中国发明专利, 专利号 CN 111361545 B, 授权公告日 2020-10-12.
发明人赵玉洁,徐明华,沈红梅. "A Process for Preparing High-Purity Drospirenone EP Impurity I" [P]. 中国发明专利, 专利号 CN 111811420 A, 授权公告日 2018-12-07.
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