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