3-(Bromomethyl)-4-cyano-5-nitro-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-4-fluoro-2-(trifluoromethoxy)pyridine-3-acetonitrile
6-(Bromomethyl)-2-cyano-3-nitro-4-(trifluoromethoxy)pyridine
3-(Chloromethyl)-4-fluoro-5-(trifluoromethoxy)pyridine-2-acetonitrile