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