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