Ethyl 5-chloro-3-cyano-2-(difluoromethyl)pyridine-4-carboxylate
Ethyl 5-chloro-3-cyano-4-(difluoromethyl)pyridine-2-carboxylate
2-Chloro-4-(difluoromethyl)-6-fluoropyridine-3-acetonitrile
Ethyl 5-chloro-4-cyano-2-(difluoromethyl)pyridine-3-carboxylate