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