中文摘要：

目的研究我国南海丛柳珊瑚（Paraplexaura sp.）的化学成分。方法采用硅胶柱色谱和反相半制备HPLC等方法分离化合物,根据波谱数据和理化常数确定其结构。结果从南海丛柳珊瑚中分离得到9个化合物,鉴定为：胆甾-4-烯-3β,6β-二醇（1）、24-亚甲基胆甾-5-烯-3-羟基-7-酮（2）、神经酰胺（E）-N-2-（1,3-二羟基-4-十八烯基）-十六酰胺（3）、胸腺嘧啶脱氧核苷（4）、尿嘧啶核苷（5）、咖啡因（6）、氨茶碱（7）、胸腺嘧啶（8）、鲨肝醇（9）。结论化合物2～8均为首次从该种属珊瑚中分离得到,其中6、7在植物中较为常见,从丛珊瑚中分离得到尚属首次。

英文摘要：

OBJECTIVE To study the organic compounds of the Gorgonian Coral Paraplexaura sp. collected from the South China Sea. METHODS The compounds were isolated and purified by silica gel and senti-preparative reverse-phase HPLC （ C18 ）. Their structures were identified by their physical and spectral data. RESULTS Nine compounds were isolated from Paraplexaura sp. , and their structures were identified as cholest-4-ene-3β, 6β-diol （ 1 ）, ergosta-5,24 （ 28 ）-dien-7-one, 3β-hydroxy （ 2 ）, N-2-（ 1,3-di- hydroxyoctadecan-4,8-dieny） -hexadecamide （ 3 ）, thymidine （ 4 ）, uridine （ 5 ）, caffeine （ 6 ） , aminophylline （ 7 ）, thymine （ 8 ） and batyl alcohol （9）. CONCLUSION Compounds 2 -8 were isolated from Paraplexaura so. for the first time, Compounds 6 and 7 are commom in plants, but they were isolated from coral for the first time.