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