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