3-(Bromomethyl)-4-cyano-2-(trifluoromethoxy)pyridine-6-acetonitrile
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