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