Methyl 5-cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 3-cyano-4-hydroxy-5-(trifluoromethoxy)pyridine-2-acetate
2-(Chloromethyl)-6-fluoro-5-hydroxy-3-(trifluoromethoxy)pyridine
Methyl 3-fluoro-6-hydroxy-2-(trifluoromethoxy)pyridine-5-acetate