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