Ethyl 5-(chloromethyl)-2-cyano-3-(trifluoromethoxy)pyridine-6-acetate
Ethyl 3-(chloromethyl)-5-cyano-6-(trifluoromethoxy)pyridine-2-acetate
Ethyl 2-(chloromethyl)-6-cyano-5-(trifluoromethoxy)pyridine-3-acetate
Ethyl 6-(chloromethyl)-3-cyano-2-(trifluoromethoxy)pyridine-4-acetate