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