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