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