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