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