Two Phenanthroindolizidine Alkaloids from Tylophora Atrofolliculata

来源 :中国化学快报 | 被引量 : 0次 | 上传用户:fwy825
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Two alkaloids tylophoridicine D(1)and tylophoridicine E(2)have been isolated from tylophora atrofolliculata.The structures of the compounds were elucidated on the basis of spect-roscopic analysis.
其他文献
By using a two-dimensional fully nonlinear compressible atmospheric dynamic numerical model, the propagation of a small amplitude gravity wave packet is simulat
A two-phase approach is proposed to deal with the integration problem in the loop layout.Tabu search is applied to cell construction in phase 1 to minimize the
The paper introduced a special approach for diesel’s all-speed-govor modeling, which, in some cases,could solve the knotty problem frequently met in computer s
In rainy season, NaCl is adopted to trace sources of cave drip water, time scales of drip water responding to precipitation, and processes of water dynamics in
The present study is focused on the influence of a routine step, washing, following the preparation of calcined rare earth exchanged Y zeolite, on its hydrother
随着中国改革开放力度的不断加大和经济的快速健康发展,对外贸易和对外交流的活动也日趋平凡。商务谈判和交往是商务活动中的重要组成部分,然而其必然会受到中外文化的差异的影
The reaction kinetics of the oxidative dehydrogenation of propane was studied at 475-550℃over a VMgO catalyst. Vanadium-magnesium-oxides are among the most sel
用共沉淀法制备了SO4 2 -/ZrO2 -Al2 O3 固体超强酸 ,并采用低温陈化和添加稀土La对其制备方法进行改进 .通过样品催化正丁烷异构化反应考察了该固体超强酸中nZr和nAl的最佳
The microstructure changes of polypropylene induced by a complex combination of shearing, friction, compression and stretching actions during pan-milling were r
A new lupane-type triterpene was isolated from the resin of Boswellia carterii Birdw.Based on the Spectral methods,its structure was elucidated as lup-20(29)-en