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