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