3-Hydroxy-6-methoxy-2-(trifluoromethoxy)pyridine-5-acetonitrile
4-Hydroxy-3-methoxy-6-(trifluoromethoxy)pyridine-2-acetonitrile
4-Hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-6-acetonitrile
3-Hydroxy-5-methoxy-6-(trifluoromethoxy)pyridine-2-acetonitrile