发明人何建平,刘建华,朱建伟. "Method for the Synthesis of Betamethasone Valerate EP Impurity E (Betamethasone 21-Valerate)" [P]. 中国发明专利, 专利号 CN 110660968 B, 授权公告日 2022-08-20.
发明人李文辉,冯建国,陈志强. "A Process for Preparing High-Purity Betamethasone Valerate EP Impurity E (Betamethasone 21-Valerate)" [P]. 中国发明专利, 专利号 CN 117526560 B, 授权公告日 2020-05-23.
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