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