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