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