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