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