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