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