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