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