6-Bromo-2-(difluoromethyl)-3-methoxypyridine-4-sulfonyl chloride
5-Bromo-2-(chloromethyl)-3-(difluoromethyl)pyridine-4-methanol
6-Bromo-2-(difluoromethyl)-4-methoxypyridine-3-sulfonyl chloride
2-Bromo-6-(difluoromethyl)-3-methoxypyridine-5-sulfonyl chloride