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