发明人王建平,黄志刚,冯建国. "Method for the Synthesis of Cimetidine EP Impurity I" [P]. 中国发明专利, 专利号 CN 113139807 A, 授权公告日 2021-07-28.
发明人何建平,刘建华,罗永刚. "A Process for Preparing High-Purity Cimetidine EP Impurity I" [P]. 中国发明专利, 专利号 CN 114446281 B, 授权公告日 2020-02-14.
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