Ethyl 6-(chloromethyl)-4-cyano-2-(difluoromethyl)pyridine-3-carboxylate
Methyl 5-(chloromethyl)-3-cyano-2-(difluoromethyl)pyridine-4-carboxylate
Methyl 3-(chloromethyl)-5-cyano-4-(difluoromethyl)pyridine-2-carboxylate
2-(Chloromethyl)-6-cyano-4-(difluoromethyl)pyridine-3-acetic acid