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