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