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