发明人李文辉,高志强,胡光. "Method for the Synthesis of 2-(Difluoromethyl)-3-hydroxy-5-nitropyridine-4-acetic acid" [P]. 中国发明专利, 专利号 CN 111115948 A, 授权公告日 2022-07-20.
发明人沈红梅,徐明华,马晓峰. "A Process for Preparing High-Purity 2-(Difluoromethyl)-3-hydroxy-5-nitropyridine-4-acetic acid" [P]. 中国发明专利, 专利号 CN 111884186 B, 授权公告日 2018-08-23.
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