3-Cyano-4-(difluoromethyl)-5-fluoro-2-nitropyridine
6-Cyano-2-(difluoromethyl)-3-fluoro-4-nitropyridine
3-(Bromomethyl)-2-cyano-6-(difluoromethyl)-5-fluoropyridine
3-Cyano-2-(difluoromethyl)-6-iodo-4-nitropyridine
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