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