南海蓖麻海绵Biemna fortis化学成分的研究(二)

STUDIES ON THE CHEMICAL CONSTITUENTS OF THE SPONGE RIEMNA FORTIS FROM THE SOUTH CHINA SEA

从南海蓖麻海绵Ｂｉｅｍｎａｆｏｒｔｉｓ中分离出４个有机化合物，经ＩＲ，＾１ＨＮＭＲ，＾１３ＣＮＭＲ，ＥＩＭＳ，ＧＣ－ＭＳ等方法确定它们的化学结构分别为：正十八酸（１），鲨肝醇（２），５α，８α－环二氧－２４ζ－甲基胆甾－６，２２－二烯，－３β－醇（３），２４ζ甲基胆甾－７，２２－二烯，－３β，５α－二醇－６－酮（４）。

Four known organic compounds have been isolated from the marine sponge Biemna fortis. That have been collected from the South China Sea. Their chemical structures have been identified by IR,~1HNMR,~13CNMR and EIMS as: stearic acid (Ⅰ), batyl alcohol (Ⅱ), 5a, 8 α- epidioxy- 24ξ- methylc holesta-6,22-dien-3β-ol (Ⅲ), and 24ξ-methylcholesta-7,22E-dien-3β, 5a-diol-6-one(Ⅳ).