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