Flavonoids and a New Polyacetylene from Bidens parviflora Willd
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چکیده
منابع مشابه
Flavonoids and a new polyacetylene from Bidens parviflora Willd.
Fifteen flavonoids, 1-7 and 9-16, and a polyacetylene, 8, were isolated from the ethanol extract of the dried whole plant of Bidens parviflora Willd. by various chromatographic techniques. Their structures have been elucidated on the basis of spectroscopic analyses and chemical studies. Compound 8 is new and was identified as 3-(R),8(E)-decene-4,6-diyne-1,3,10-triol. All the flavonoid compounds...
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Extracts from herb and flowers of Bidens tripartita L. (Asteraceae), obtained using solvents of different polarity, were studied for their radical scavenging effects. Antioxidant activities of pure flavonoids: flavanomarein (isookanin 7-O-glucoside), cynaroside (luteolin 7-O-glucoside) and luteolin, which had been isolated from this plant, were also evaluated. Radical-scavenging activity was me...
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Bidens pilosa is used as an ethnical medicine for bacterial infection or immune modulation in Asia, America and Africa. Here, we employed n IFNpromoter-driven luciferase reporter construct and T cells to characterize immunomodulatory compounds from this plant based on a ioactivity-guided isolation principle. We found that PHA, a positive control, caused a six-fold increase in IFNpromoter activi...
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Background and objectives: The genus Artemisia contains over 250 species all over the world. A. biennis Willd is one of the species which grows wildly in Iran. Camphor and (E)-beta-farnesene have been reported as the major components of the essential oil from A. biennis. In spite of the presence of a rather wide range of reported bioactivities there i...
متن کاملTotal synthesis of bidensyneosides A2 and C: remarkable protecting group effects in glycosylation
Bidensyneosides are a group of five recently identified polyacetylenic glucosides from Bidens parviflora WILLD, a traditional Chinese medicinal plant that contains rich bioactive natural products. It was shown that bidensyneosides inhibited both histamine release and nitric oxide production. The synthesis of bidensyneoside A2 (2) and C (4) as well as 3-deoxybidensyneoside C (5) are described. T...
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ژورنال
عنوان ژورنال: Molecules
سال: 2008
ISSN: 1420-3049
DOI: 10.3390/molecules13081931