Ethyl 2-cyano-5-(difluoromethyl)-3-methylpyridine-6-carboxylate
Methyl 6-(bromomethyl)-3-cyano-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 5-cyano-2-(difluoromethyl)-3-methylpyridine-6-carboxylate
2-Cyano-3-(difluoromethyl)-5-methoxypyridine-4-carbonyl chloride