4-Bromo-3-(difluoromethyl)-2-hydroxypyridine-5-sulfonamide
3-Bromo-2-(difluoromethyl)-5-hydroxypyridine-6-sulfonamide
3-Bromo-2-(difluoromethyl)-4-iodo-5-methoxypyridine
6-Bromo-3-(difluoromethyl)-4-iodo-2-methoxypyridine
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