西沙软珊瑚Sarcophyton crassocaule中具有抗炎活性的西松烷二萜

采集来自中国南海西沙群岛的肥厚肉芝软珊瑚(Sarcophyton crassocaule),研究其化学成分及生物活性。采用硅胶柱层析、薄层层析、凝胶(Sephadex-20)柱层析和半制备高效液相(semi-preparative highperformance liquid chromatography,Semi-Prep HPLC)等分离方法,对S.crassocaule的乙酸乙酯相进行分离纯化,得到11个化合物。将其理化特性和波谱数据与文献数据进行比对,鉴定这11个化合物的结构分别为:sarsolilide A(1)、trochelioid A(2)、(1R^(*),2R^(*),7R^(*),8R^(*),15R^(*),3E,11E)-7,8:1,15-diepoxycembra-3,11-dien-16,2-olide(3)、(+)-7α,8β-dihydroxyde-epoxysarcophine(4)、1,15β-epoxy-deoxy-sarcophine(5)、(-)-isosarcophine(6)、cherbonolide A(7)、sarcomililatin A(8)、trocheliolide A(9)、lobophytin B(10)和(+)-sarcophine(11)。化合物1~11均为二萜类化合物,其中化合物3首次在S.crassocaule中被分离到。抗炎活性测试结果表明,sarcomililatin A(8)能够抑制脂多糖(LPS)诱导的RAW264.7细胞中NO的生成,其IC50值为(35.60±3.10)μmol·L^(-1),其他化合物没有明显的抗炎活性。

A Novel Diterpenoid from the Soft Coral Sarcophyton crassocaule

A novel hydroperoxide cembrane-type diterpenoid was isolated from the soft coral Sarcophyton crassocaule collected from the Xisha Islands in the South China Sea. The structure of 3 was established by spectroscopy and X-ray diffraction analysis,named as sarcophyocrassolide A. It exhibited strong cytotoxicity against the P-388 cell line with IC_ 50 value of 0.1 μg/mL.