Methyl 3-fluoro-5-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 5-fluoro-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylate
5-Fluoro-2-hydroxy-4-methyl-3-(trifluoromethoxy)pyridine
4-Fluoro-5-hydroxy-2-methyl-3-(trifluoromethoxy)pyridine