Ursane Saponins from the Stems ofFirmiana simplexand their Cytotoxic Activity
摘要:
Three new ursane triterpene saponins, together with twelve known ursane triterpenes were isolated from the stems of Firmiana simplex. The structures of the saponines were elucidated on the basis of spectroscopic and chemical methods. The cytotoxic activity of all compounds was evaluated in vitro against lung adenocarcinoma (A549), ovarian cancer (SK-OV-3), skin melanoma (SK-MEL-2), and colon cancer (HCT-15) human cell lines, using a sulforhodamine (SRB) assay. 23-Hydroxyursolic acid showed cytotoxicity against the tested cell lines with IC50 values ranging from 11.96 to 14.11 mu M.
Abstract Ten pentacyclic triterpenes (1-10) were isolated from Lavandula coronopifolia. We evaluated their α-glucosidase inhibitory activity, and found that the aglycones, 1, 2, 3, 4, 7 and 10 showed superior IC50 values to the positive control. In order to explain the structural requirements for α-glucosidase inhibitory activity, eleven derivatives were prepared, including one new compound, 2-for
The present invention provides an early insulin secretion stimulator consisting of a triterpene represented by the following general formula (1) and/or a triterpene represented by the following general formula (2).
[where R1 represents COOH, etc., R11 and R12 represent CH2OH, etc., X1 represents hydrogen or OH and X11, X12, X21 and X22 represent OH, etc.]
POLYHYDROXYLATED PENTACYCLIC TRITERPENE ACIDS AS HMG-COA REDUCTASE INHIBITORS
申请人:Hans, Joachim
公开号:EP2812005A1
公开(公告)日:2014-12-17
Insulin secretion potentiator
申请人:Matsuyama Futoshi
公开号:US20050143464A1
公开(公告)日:2005-06-30
The present invention provides early insulin secretion stimulators consisting of triterpenes represented by the following general formula (1) and/or triterpenes represented by the following general formula (2).
[where R
1
represents COOH, etc., R
11
and R
12
represent CH
2
OH, etc., X
1
represents hydrogen or OH and X
11
, X
12
, X
21
and X
22
represent OH, etc.]