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