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