Ethyl 4-amino-3-(chloromethyl)-2-(trifluoromethoxy)pyridine-5-acetate
Ethyl 4-amino-6-(chloromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
Ethyl 4-amino-2-(chloromethyl)-6-(trifluoromethoxy)pyridine-3-acetate
Ethyl 4-amino-6-(chloromethyl)-3-(trifluoromethoxy)pyridine-2-acetate