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