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