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