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