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