中文摘要：

首次从柳珊瑚Verrucella sp.中分离纯化得到无色结晶化合物,根据NMR和MS谱推知其为具有西松烷型骨架的萜类,为含有4个乙酰氧基,2个末端双键,1个六元环醚,1个γ-内酯的二萜——Junceellin,普通命名法命名为（1R,2R,3S,4R,6S,7R,8R,9S,10S,14S）-四乙酰氧基-6-氯代-4,8-环氧-5（16）,11（20）-二烯-18,7-内酯。通过晶体X-射线衍射技术研究了其立体结构。

英文摘要：

Junceellin,a coloreless crystal compound,was separated and purified from the gorgonian Verrucella sp.Its structure was characterized by MS and various NMR spectra,e.g.1H,13C,DEPT,COSY,HMQC and HMBC.The result showed Junceellin had a briarane-A skeleton and contained four acetoxy groups,two terminal double bonds,a γ-lactone ring and six-membered cycloether ring.Its stereochemistry was further elucidated by crystal X-ray analysis.