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