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