3-(Chloromethyl)-2-cyano-4-(trifluoromethoxy)pyridine-6-acetonitrile
5-(Chloromethyl)-2-fluoro-4-iodo-3-(trifluoromethoxy)pyridine
2-(Chloromethyl)-6-cyano-5-(trifluoromethoxy)pyridine-3-acetonitrile
2-(Bromomethyl)-3-cyano-5-(trifluoromethoxy)pyridine-6-acetic acid