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