2-Bromo-4-(difluoromethyl)-3-hydroxypyridine-5-sulfonyl chloride
4-Bromo-5-(difluoromethyl)-3-hydroxypyridine-2-sulfonamide
4-Bromo-3-(difluoromethyl)-2-hydroxypyridine-5-sulfonamide
3-Bromo-2-(difluoromethyl)-5-hydroxypyridine-6-sulfonamide
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