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