Wang M K, Wu F E, Chen Y Z
Department of Chemistry, Lanzhou University.
Yao Xue Xue Bao. 1993;28(11):845-8.
Four triterpenes were isolated from the alcoholic extract of Bemeuxia thibetica Decne. A new triterpene, 16 alpha, 21 beta, 22 alpha, 28-tetrahydroxyolean-12-en-3-one, named bemeuxin (I), was identified on the basis of spectral evidences. The other three triterpenes were identified as 21-tigloylbarringtogenol C(II), 2 alpha, 3 alpha-dihydroxyursolic acid (III) and 2 alpha, 3 beta-dihydroxyursolic acid (IV).
从西藏美登木（Bemeuxia thibetica Decne.）的乙醇提取物中分离出四种三萜类化合物。基于光谱证据鉴定出一种新的三萜类化合物，16α,21β,22α,28 - 四羟基齐墩果 - 12 - 烯 - 3 - 酮，命名为美登木素（I）。另外三种三萜类化合物分别鉴定为21 - 惕各酰基巴灵通醇C（II）、2α,3α - 二羟基熊果酸（III）和2α,3β - 二羟基熊果酸（IV）。
