2-Amino-3-(aminomethyl)-4-(difluoromethyl)pyridine-6-methanol
4-Amino-2-(aminomethyl)-3-(difluoromethyl)pyridine-5-acetonitrile
3-Amino-6-(aminomethyl)-2-(difluoromethyl)pyridine-5-acetonitrile
5-Amino-3-(aminomethyl)-4-(difluoromethyl)pyridine-2-acetonitrile