24-methylene tetracyclic triterpenes from Polyalthia lancilimba
24-methylene tetracyclic triterpenes from Polyalthia lancilimba
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DOI：
10.1016/s0031-9422(98)00400-2
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发表时间：
1998-12-01
期刊：
影响因子：
3.8
通讯作者：
Li, CM
中科院分区：
文献类型：
--
作者：
Lue, YP;Mu, Q;Li, CM
从蓼属植物的茎茎中分离到两个具有毛甾烷骨架的24-亚甲基四环三萜。通过光谱分析和与文献中描述的其他羊毛甾烷型三萜的比较确定了它们的结构。两个新成分（1和3）被鉴定为24-亚甲基-7,9(Il)-二醇-3 β，15 α -二醇和24-亚甲基-8-en-2 β，3 β，21-三醇。(C) 1998 Elsevier Science Ltd.出版版权所有。
Two new 24-methylene tetracyclic triterpenes that possess the lanostane skeleton have been isolated from the stem barks of Polyalthia lamcilimba. Their structures were determined by spectral analysis and comparisons with other lanostane type triterpenes described in the literature. The two new components (1 and 3) were elucidated as 24-methylenelanosta-7,9( Il)-dien-3 beta,15 alpha-diol and 24-methylenelanosta-8-en-2 beta,3 beta,21-triol. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.