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