Substituting ring D with eletron-withdrawing groups will weaken the activityWe also testified that these compounds can bring Bel 7402 tumor cell into death.

• 并对其中两个化合物42i、42C进行了细胞凋亡试验，证明该类化合物可引起人肝癌 Bel 7402细胞凋亡。