2-Amino-3-(chloromethyl)-6-(difluoromethyl)pyridine-5-carboxaldehyde
6-Amino-4-(bromomethyl)-3-(difluoromethyl)pyridine-2-acetonitrile
2-Amino-3-(chloromethyl)-5-(difluoromethyl)pyridine-4-carboxaldehyde
6-Amino-4-(bromomethyl)-3-(difluoromethyl)pyridine-2-carboxaldehyde