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