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