One chloro-furoeremophilanoid and two new natural dimers from Ligularia atroviolacea

三新混合物包括一 chloro-furoeremophilanoid (1 ) ，一 eremophiladiolide (2 ) ，一稀罕 nor-furoeremophilanoid， ligulatrovine A (3 ) ，和已知的 furoeremophilanolide (4 ) 更暗淡，从 Ligularia atroviolacea 被孤立。混合物的结构 1 鈥？被象 X 光检查衍射学习一样包括 1D 和 2D NMR 实验的分光镜的方法阐明。

Synthesis and Biological Evaluation of Pyranone Analogues of Territrem B

23 compounds containing pyranone pharmacophore of territrem B were designed and synthesized. Some of the analogues showed IC50 values of AChE inhibition at 10^-5 mol/L.