Ethyl 6-cyano-4-(difluoromethyl)-3-methoxypyridine-2-carboxylate
Methyl 4-cyano-2-(difluoromethyl)-3-iodopyridine-6-acetate
2-(Bromomethyl)-6-cyano-3-(difluoromethyl)-5-(trifluoromethyl)pyridine
Methyl 3-cyano-4-(difluoromethyl)-2-iodopyridine-6-acetate