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