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