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