4-Cyano-3-nitro-2-(trifluoromethoxy)pyridine-5-acetonitrile
5-Cyano-4-nitro-3-(trifluoromethoxy)pyridine-2-acetonitrile
3-Fluoro-2-(fluoromethyl)-6-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
6-Fluoro-2-(fluoromethyl)-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine