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