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