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