Ethyl 4-(chloromethyl)-3-cyano-6-(difluoromethyl)pyridine-2-acetate
Ethyl 4-(chloromethyl)-2-cyano-3-(difluoromethyl)pyridine-6-acetate
2-(Bromomethyl)-4-cyano-5-(difluoromethyl)pyridine-3-acetonitrile
2-(Bromomethyl)-3-cyano-5-(difluoromethyl)pyridine-4-acetonitrile