The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to trea...The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to treat he-maturia and diarrhea for a long history inChina . Past investigations on the chemical constituents of this plant have yielded fourtriterpenes, five sesquiterpenes, a phe-nylproanoid-glycerol and four flavonoids. In the presentstudy, eight flavonoids were isolated from the 95% EtOH extract of the leaves of this plant, andidentified as quercitrin (1), quercetin (2),kaempferol-3-O-(6″-O-E-p-coumaroyl)-β-D-glucopyranoside ( 3 ), kaempferol (4), kaempferitrin (5),myricetin (6), eriodictyol (7), and catechin (8) on the basis of their spectral data.展开更多
A new sesquiterpenoid lactone, 3,6,9-trimethyl-pyrano[2,3,4-de]chromen-2-one (1) and a novel sesquiterpenoid quinone, 6-[2-(5-acetyl-2,7-dimethyl-8-oxo-bicyclo[4.2.0]octa-1,3,5- trien-7-yl)-2-oxo-ethyl]-3,9-dimethyl...A new sesquiterpenoid lactone, 3,6,9-trimethyl-pyrano[2,3,4-de]chromen-2-one (1) and a novel sesquiterpenoid quinone, 6-[2-(5-acetyl-2,7-dimethyl-8-oxo-bicyclo[4.2.0]octa-1,3,5- trien-7-yl)-2-oxo-ethyl]-3,9-dimethylnaphtho[1,8-bc]pyran-7,8-dione (2) together with a known perezone (3) were isolated from the roots of Helicteres angustifolia. The structures were elucidated as mainly on the basis of 1D and 2D NMR spectroscopic data.展开更多
文摘The mangrove plant Heritiera littoralis D. (Sterculi-aceae) is widelydistributed in southeastern Asia and traditionally used as a fish, arrowhead, and spearhead poison .It has also been used as a folk medicine to treat he-maturia and diarrhea for a long history inChina . Past investigations on the chemical constituents of this plant have yielded fourtriterpenes, five sesquiterpenes, a phe-nylproanoid-glycerol and four flavonoids. In the presentstudy, eight flavonoids were isolated from the 95% EtOH extract of the leaves of this plant, andidentified as quercitrin (1), quercetin (2),kaempferol-3-O-(6″-O-E-p-coumaroyl)-β-D-glucopyranoside ( 3 ), kaempferol (4), kaempferitrin (5),myricetin (6), eriodictyol (7), and catechin (8) on the basis of their spectral data.
基金supported by the National Natural Science Foundation of China(NO.20002009,20272085,30271601)Guangdong Provincial Natural Science Foundation(No.021770).
文摘A new sesquiterpenoid lactone, 3,6,9-trimethyl-pyrano[2,3,4-de]chromen-2-one (1) and a novel sesquiterpenoid quinone, 6-[2-(5-acetyl-2,7-dimethyl-8-oxo-bicyclo[4.2.0]octa-1,3,5- trien-7-yl)-2-oxo-ethyl]-3,9-dimethylnaphtho[1,8-bc]pyran-7,8-dione (2) together with a known perezone (3) were isolated from the roots of Helicteres angustifolia. The structures were elucidated as mainly on the basis of 1D and 2D NMR spectroscopic data.
