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