3-Amino-5-(aminomethyl)-2-(difluoromethyl)pyridine-4-carboxaldehyde
4-Amino-3-(chloromethyl)-5-(difluoromethyl)-2-methoxypyridine
3-Amino-4-(aminomethyl)-2-(difluoromethyl)pyridine-6-carboxaldehyde
3-Amino-4-(aminomethyl)-2-(difluoromethyl)pyridine-5-carboxaldehyde