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