2-Amino-3-(bromomethyl)-5-cyano-6-(difluoromethyl)pyridine
4-Amino-3-bromo-2-(difluoromethyl)-6-iodopyridine
3-Amino-4-cyano-2-(difluoromethyl)-6-nitropyridine
3-Amino-2-cyano-6-(difluoromethyl)-4-nitropyridine
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