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