3-(Difluoromethyl)-5-fluoro-4-hydroxypyridine-2-sulfonamide
3-(Difluoromethyl)-2-fluoro-6-hydroxypyridine-5-sulfonamide
6-(Difluoromethyl)-2-fluoro-3-hydroxypyridine-4-sulfonamide
3-(Bromomethyl)-2-(difluoromethyl)-5-fluoro-6-hydroxypyridine
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