【摘 要】
：
Two new cucurbitane-type triterpenoids, (23E)-5 β,19-epoxycucurbita-6,23,25-triene-3β-ol (1) and (19R, 23E)-5β,19-epoxy-19-ethoxycucurbita-6,23-diene-3 β,25
【机 构】
：
School of Traditional Chinese Materia Medica,Yanbian University Health Science Center
【基金项目】
：
supported by E&T Modern Center for Natural Products of Liaoning Province of China
论文部分内容阅读
Two new cucurbitane-type triterpenoids, (23E)-5 β,19-epoxycucurbita-6,23,25-triene-3β-ol (1) and (19R, 23E)-5β,19-epoxy-19-ethoxycucurbita-6,23-diene-3 β,25-diol (2), together with three known compounds, have been isolated from the fruit of Momordica charantia L. Their structures were determined on the basis of spectral analysis. Their cytotoxic activity was tested on 5 cancer cell lines, MCF-7, HepG2, Dul45, Colon205 and HL-60 by MTT assay. Compounds 1, 3 and 4 showed weak cytotoxicity.
其他文献
Hyperphenylalaninemia is one of the commonest inborn errors of metabolism affecting approximately 1 in 15 000 live births. Among Chinese, BH4 deficiency leading
Knowledge of plant responses to soil water availability is essential for the development of efficient irrigation strategies.However,notably different results ha
In the present work, different silica-based supported cobalt (Co) catalysts were synthesized and used for CO2 hydrogenation for methanation. Different supports,
The author considers the Cauchy problem for quasilinear inhomogeneous hyperbolic systems.Under the assumption that the system is weakly dissipative,Hanouzet and
在大规模分布式系统中,节点加入与退出所产生的扰动行为对系统性能有直接影响.当前关于节点扰动的行为模型主要描述节点达到和持续时长的统计特性,同时也对节点进行分类并赋
T Toxicities(-lgEC)of 16 halogeno-benzenes against vibrio qinghaiensis(Q67)were measured systematically, and their 2D-QSAR model(R = 0.821)was established,which
高超声速再入轨迹优化问题是一类复杂的最优控制问题.采用高斯伪谱法(GPM)将再入轨迹优化问题转化为非线性规划问题(NLP),对NLP进行归一化处理后,采用SNOPI软件包求解.根据协
Jerusalem artichoke (Helianthus tuberosus L.) not just can be used for bioethanol production but may be potentially used in phytoremediation for the removal of
提出了多约束下连续体结构拓扑优化设计的K邻近(KNN)方法。首先以结构单元作为样本,将整个设计区域看作是样本空间,将连续体结构拓扑优化看作是一种对单元的模式识别;然后利
Washing using ceramic micro-filtration membranes was studied in the preparation of nano-sized TiO2 and Al203 powder precursors obtained by wet chemical methods.