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