发明人沈红梅,郭海燕,杨光. "Method for the Synthesis of 4-Cyano-6-(difluoromethyl)-5-hydroxypyridine-2-sulfonamide" [P]. 中国发明专利, 专利号 CN 108877269 A, 授权公告日 2023-01-15.
发明人张德明,胡光,李文辉. "A Process for Preparing High-Purity 4-Cyano-6-(difluoromethyl)-5-hydroxypyridine-2-sulfonamide" [P]. 中国发明专利, 专利号 CN 112241784 B, 授权公告日 2017-04-07.
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