Ethyl 4-amino-3-(difluoromethyl)-6-nitropyridine-2-carboxylate
2-Amino-6-(bromomethyl)-5-(difluoromethyl)pyridine-3-acetonitrile
Ethyl 4-amino-3-(difluoromethyl)-2-nitropyridine-6-carboxylate
2-Amino-3-(bromomethyl)-4-(difluoromethyl)pyridine-6-acetonitrile