4-Bromo-3-(difluoromethyl)-2-methoxypyridine-5-sulfonyl chloride
4-Bromo-2-(difluoromethyl)-6-methoxypyridine-3-sulfonyl chloride
4-Bromo-2-(difluoromethyl)-5-methoxypyridine-3-sulfonyl chloride
5-Bromo-4-(difluoromethyl)-3-fluoropyridine-2-sulfonyl chloride