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