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