Ethyl 6-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-hydroxy-6-methoxy-2-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 6-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-6-acetate