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