Ethyl 5-fluoro-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylate
5-Fluoro-4-(fluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine
3-Fluoro-4-(fluoromethyl)-5-hydroxy-2-(trifluoromethoxy)pyridine
3-Fluoro-2-(fluoromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine