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