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