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