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