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