Ethyl 3-cyano-2-(difluoromethyl)-6-iodopyridine-5-carboxylate
5-(Bromomethyl)-2-chloro-3-(difluoromethyl)pyridine-6-acetonitrile
Ethyl 2-cyano-6-(difluoromethyl)-4-iodopyridine-3-carboxylate
4-(Bromomethyl)-2-chloro-6-(difluoromethyl)pyridine-3-acetonitrile