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