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