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