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