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