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