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