南海海绵Axinyssa sp．的化学成分

目的：对采自中国南海的海绵Axinyssa sp．进行化学成分研究，从中寻找具有生物活性的次生代谢产物。方法：用硅胶和凝胶LH-20柱层析对海绵Axinyssa sp．的乙醚提取物进行分离纯化，并结合现代波谱技术对得到的化合物进行结构鉴定。结果：分离得到了4个化合物，其结构分别鉴定为theonellin isothiocyanate（1），theonellin formamide（2），7-isothiocyanato-7，8-dihydro-α-bisabolene（3）和axinysterol（4）。结论：化合物1-3均为首次从海绵Axinyssa sp．中分离得到，同时也是首次从中国海域的海洋生物中分离得到。     

Trans-dimer D,a novel dimeric sesquiterpene with a bis-bisabolene skeleton from a Hainan sponge Axinyssa variabilis

A novel bisabolene sesquiterpene dimer named trans-dimer D (1) and its diastereoisomer trans-dimer C (2) reported in our previous work have been isolated as an inseparable mixture in a ratio of 1.5:1 from the South China Sea sponge Axinyssa variabilis. The structure of 1 was determined on the basis of extensive spectroscopic analysis and by comparison of its NMR spectral data with those of structurally related compounds. Compound 1 represents the fourth example of a sesquiterpene dimer with a bis-bisabolene skeleton.