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