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