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