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