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