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