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