Methyl 4-bromo-5-(difluoromethyl)-3-fluoropyridine-2-carboxylate
3-Bromo-4-(difluoromethyl)-2-iodopyridine-6-sulfonyl chloride
3-Bromo-2-(difluoromethyl)-6-iodopyridine-5-sulfonyl chloride
3-Bromo-2-(difluoromethyl)-5-iodopyridine-6-sulfonyl chloride