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