2-Bromo-6-(chloromethyl)-5-(difluoromethyl)pyridine-3-carboxaldehyde
2-Bromo-6-(chloromethyl)-4-(difluoromethyl)pyridine-3-carboxaldehyde
5-Bromo-3-(difluoromethyl)-2-methoxypyridine-4-sulfonyl chloride
2-Bromo-6-(chloromethyl)-3-(difluoromethyl)pyridine-4-carboxaldehyde