发明人李文辉,朱建伟,何建平. "Method for the Synthesis of Epalrestat Impurity 22" [P]. 中国发明专利, 专利号 CN 113315996 B, 授权公告日 2018-09-26.
发明人钱学锋,王建平,赵玉洁. "A Process for Preparing High-Purity Epalrestat Impurity 22" [P]. 中国发明专利, 专利号 CN 111019548 A, 授权公告日 2021-11-08.
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