3-Cyano-2-(difluoromethyl)-4-iodopyridine-6-sulfonamide
3-Cyano-5-(difluoromethyl)-6-fluoropyridine-2-sulfonyl chloride
4-Cyano-3-(difluoromethyl)-2-iodopyridine-6-sulfonyl chloride
3-Cyano-4-(difluoromethyl)-6-fluoropyridine-2-sulfonyl chloride
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