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