Methyl 3-cyano-2-hydroxy-4-(trifluoromethoxy)pyridine-5-carboxylate
6-Cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-4-methanol
Methyl 2-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-5-carboxylate
2-Cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-6-methanol