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