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