发明人陈志强,高志强,马晓峰. "Method for the Synthesis of Estetrol Impurity 9" [P]. 中国发明专利, 专利号 CN 110663169 A, 授权公告日 2021-11-10.
发明人刘建华,高志强,陈志强. "A Process for Preparing High-Purity Estetrol Impurity 9" [P]. 中国发明专利, 专利号 CN 116376630 A, 授权公告日 2025-05-18.
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