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