【摘 要】
：
To investigate the saponins from whole plants of Lysimachia davurica Ledeb., two new saponins named davuricoside I (compound 1) and E (compound 2) were isolated
【机 构】
：
Department of Chinese Medicine Sciences and Engineering, Institute of Medicinal Plants Development
论文部分内容阅读
To investigate the saponins from whole plants of Lysimachia davurica Ledeb., two new saponins named davuricoside I (compound 1) and E (compound 2) were isolated. Their chemical structures were elucidated as 3β,16α, 28, 29-tetrihydroxy-olean-12-en-3-O-β-D-glucopyranosyl-(1-→2)-β-D-glucuronopyranoside (compound 1)and 3β,16α, 29-trihydroxy-13, 28-epoxy-oleanane-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucuronopyranoside (compound 2) on the basis of their one- and two-dimensional nuclear magnetic resonance and mass spectrometry data, and chemical methods. Compound 1 showed significant cytotoxic activity against human A2780 cells.
其他文献
In the year 2002, Lin detected a nontrivial family in the stable homotopy groups of spheres πt-6S which is represented by hngo~γ3 ∈ Ext6,tA(Zp, Zp) in the Ad
QC-Tree is one of the most storage-efficient structures for data cubes in an MOLAP system. Although QC-Tree can achieve a high compression ratio, it is still a
When a body consists completely or even partly of viscoelastic materials, its response under static loading will be time-dependent. The adhesives used to glue t
Suppose X is a super-α-stable process in Rd, (0 ＜α＜ 2), whose branching rate function is dt, and branching mechanism is of the form ψ(z) = z1+β (0 ＜β≤ 1). Le
This article introduces the concept of commutative semigroups of almost asymptotically nonexpansive-type mappings in a Ban ach space X which has the Opial prope
A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimiz
Ni catalysts supported on various mixed oxides of Al2O3 with rare earth oxide and transitional metal oxides were synthesized. The studies focused on the measure