5-(Difluoromethyl)-2-hydroxypyridine-4-sulfonamide
5-(Difluoromethyl)-2-hydroxypyridine-3-sulfonamide
4-(Difluoromethyl)-5-hydroxypyridine-2-sulfonamide
4-(Difluoromethyl)-3-hydroxypyridine-5-sulfonamide
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