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