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