4-(Bromomethyl)-3-cyano-6-(trifluoromethoxy)pyridine-2-acetic acid
3-(Bromomethyl)-2-cyano-4-(trifluoromethoxy)pyridine-6-acetonitrile
5-Chloro-4-(chloromethyl)-3-(trifluoromethoxy)pyridine-2-acetic acid
2-(Bromomethyl)-6-cyano-5-(trifluoromethoxy)pyridine-3-acetonitrile