The first total syntheses of three "unsymmetrical" (i.e. different terminal groups in the side chains) members of the histrionicotoxin family of alkaloids have been accomplished via stepwise introduction of the two side chain moieties onto a common tricyclic core.
                                    通过将两个侧链部分逐步引入到共同的
三环核上,完成了
生物碱类
生物毒素家族的三个“不对称”(即侧链中不同的末端基团)成员的首次全部合成。