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