4-Bromo-3-(difluoromethyl)-2-fluoropyridine-5-sulfonyl chloride
4-Bromo-2-(difluoromethyl)-6-fluoropyridine-3-sulfonyl chloride
5-Bromo-4-(difluoromethyl)-2-fluoropyridine-3-carboxaldehyde
4-Bromo-2-(difluoromethyl)-5-fluoropyridine-3-sulfonyl chloride