发明人李文辉,王建平,林芳. "Method for the Synthesis of Obeticholic Acid Impurity 49" [P]. 中国发明专利, 专利号 CN 113428645 B, 授权公告日 2017-10-04.
发明人朱建伟,高志强,罗永刚. "A Process for Preparing High-Purity Obeticholic Acid Impurity 49" [P]. 中国发明专利, 专利号 CN 108573038 B, 授权公告日 2020-09-05.
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