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