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