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