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