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