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