Ethyl 3-cyano-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetate
Methyl 6-fluoro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetate
Ethyl 2-cyano-6-(fluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate
Methyl 2-fluoro-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetate