Hughes D C, O'Brien P Q, Davis P L. "Method for the Synthesis of 4-(Difluoromethyl)-5-hydroxy-2-nitronicotinamide" [P]. US Patent, US 11274249 B2, 2021-03-02.
发明人马晓峰,沈红梅,韩伟. "A Process for Preparing High-Purity 4-(Difluoromethyl)-5-hydroxy-2-nitronicotinamide" [P]. 中国发明专利, 专利号 CN 108119818 A, 授权公告日 2019-08-05.
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