发明人罗永刚,黄志刚,林芳. "Method for the Synthesis of 2-(4-(Difluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridin-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 109095789 B, 授权公告日 2019-10-26.
发明人李文辉,罗永刚,张德明. "A Process for Preparing High-Purity 2-(4-(Difluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridin-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 108026927 B, 授权公告日 2021-05-21.
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