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