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