发明人何建平,冯建国,刘建华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116144337 A, 授权公告日 2019-01-03.
发明人李文辉,罗永刚,唐晓军. "Method for the Synthesis of 4-(Difluoromethyl)-5-hydroxy-3-(trifluoromethoxy)picolinic acid" [P]. 中国发明专利, 专利号 CN 115370213 A, 授权公告日 2018-05-28.
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