5-Chloro-4-(chloromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine
6-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-4-acetonitrile
2-Cyano-6-hydroxy-4-(trifluoromethoxy)pyridine-3-acetonitrile
2-Cyano-5-hydroxy-6-(trifluoromethoxy)pyridine-3-acetonitrile