2-Cyano-3-(difluoromethyl)pyridine-6-sulfonamide
4-Chloro-2-(difluoromethyl)pyridine-3-sulfonamide
3-Chloro-5-(difluoromethyl)pyridine-4-sulfonamide
5-Chloro-4-(difluoromethyl)pyridine-2-sulfonamide
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