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