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