发明人王建平,马晓峰,陈志强. "Method for the Synthesis of 2-(Difluoromethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117442445 B, 授权公告日 2015-12-14.
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