发明人冯建国,马晓峰,张德明. "Method for the Synthesis of Cholic Acid Impurity 18" [P]. 中国发明专利, 专利号 CN 115210447 A, 授权公告日 2016-08-11.
Kumar R, Stevens L M, Johnson M A. "A Process for Preparing High-Purity Cholic Acid Impurity 18" [P]. US Patent, US 11649406 B2, 2020-04-24.
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