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