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