4-(Difluoromethyl)-3-fluoro-2-iodopyridine-6-sulfonyl chloride
4-(Difluoromethyl)-6-fluoro-2-iodopyridine-3-sulfonyl chloride
4-(Difluoromethyl)-6-fluoro-3-iodopyridine-2-sulfonyl chloride
5-(Difluoromethyl)-3-fluoro-2-iodopyridine-4-sulfonyl chloride