发明人郭海燕,韩伟,孙丽萍. "Method for the Synthesis of 4-(Difluoromethyl)-2,6-dihydroxypyridine-3-sulfonamide" [P]. 中国发明专利, 专利号 CN 111251696 B, 授权公告日 2023-11-01.
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