Ethyl 3-amino-2-(aminomethyl)-6-(difluoromethyl)pyridine-4-carboxylate
Ethyl 2-amino-5-(aminomethyl)-3-(difluoromethyl)pyridine-4-carboxylate
3-Amino-6-(chloromethyl)-2-(difluoromethyl)pyridine-5-carboxaldehyde
Ethyl 2-amino-4-(aminomethyl)-3-(difluoromethyl)pyridine-5-carboxylate