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