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