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