2-Amino-4-cyano-5-(difluoromethyl)pyridine-3-sulfonamide
3-Amino-6-(difluoromethyl)-2-iodopyridine-5-sulfonamide
4-Amino-5-(difluoromethyl)-2-iodopyridine-3-sulfonamide
4-Amino-5-(difluoromethyl)-3-iodopyridine-2-sulfonamide
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