2-Bromo-6-cyano-5-(difluoromethyl)pyridine-3-carbonyl chloride
3-Bromo-5-chloro-6-(difluoromethyl)pyridine-2-sulfonyl chloride
3-Bromo-5-chloro-4-(difluoromethyl)pyridine-2-sulfonyl chloride
3-Bromo-5-chloro-2-(difluoromethyl)pyridine-4-sulfonyl chloride