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