4-Cyano-3-hydroxy-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
3-Cyano-5-hydroxy-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-Cyano-4-hydroxy-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-Cyano-2-hydroxy-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine