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