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