Methyl 6-cyano-3-fluoro-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-cyano-5-fluoro-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 2-cyano-4-fluoro-6-(trifluoromethoxy)pyridine-3-acetate
3-Cyano-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetonitrile