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