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