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