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