5-Bromo-3-(difluoromethyl)-2-hydroxypyridine-4-sulfonyl chloride
5-Bromo-2-(difluoromethyl)-3-iodopyridine-4-acetonitrile
5-Bromo-3-(difluoromethyl)-4-hydroxypyridine-2-sulfonyl chloride
5-Bromo-4-(difluoromethyl)-2-hydroxypyridine-3-sulfonyl chloride