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