3-(Difluoromethyl)-2,6-dihydroxypyridine-4-sulfonamide
2-(Difluoromethyl)-3,6-dihydroxypyridine-5-sulfonamide
2-(Difluoromethyl)-3,6-dihydroxypyridine-4-sulfonamide
4-(Difluoromethyl)-3,6-dihydroxypyridine-2-sulfonamide
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