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