发明人李文辉,黄志刚,林芳. "一种甲硝唑杂质25的合成方法" [P]. 中国发明专利, 专利号 CN 109485698 A, 授权公告日 2018-08-16.
发明人马晓峰,林芳,孙丽萍. "Method for the Synthesis of Metronidazole Impurity 25" [P]. 中国发明专利, 专利号 CN 115320161 A, 授权公告日 2023-01-06.
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