4-Cyano-5-hydroxy-2-(trifluoromethoxy)pyridine-3-acetonitrile
Methyl 5-cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-5-acetate
Methyl 3-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-6-acetate