Lignans from the roots of Echinops giganteus

Two new lignans, 1 and 2, were isolated from the Cameroonian medicinal plant, Echinops giganteus (Compositae). Their structures were elucidated by extensive NMR spectroscopy and mass spectrometry. Two new lignans, (+)-4-(3-methylbutanoyl)-2,6-di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane and...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 2004-07, Vol.65 (14), p.2101-2105
Main Authors: Tene, Mathieu, Tane, Pierre, Sondengam, Beiban L., Connolly, Joseph D.
Format: Article
Language:English
Subjects:
Asteraceae
Biological and medical sciences
Chemical constitution
chemical structure
Chromatography, Gel
Chromatography, Liquid
Compositae
Echinops
Echinops giganteus
Echinops Plant - chemistry
Fundamental and applied biological sciences. Psychology
furofuran
Furofuran derivatives
lignans
Lignans - chemistry
Lignans - isolation & purification
Magnetic Resonance Spectroscopy
medicinal plants
Molecular Structure
phytochemicals
plant extracts
Plant Extracts - chemistry
Plant physiology and development
Plant Roots - chemistry
spectral analysis
stereochemistry
Unsymmetrical lignans
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Summary:Two new lignans, 1 and 2, were isolated from the Cameroonian medicinal plant, Echinops giganteus (Compositae). Their structures were elucidated by extensive NMR spectroscopy and mass spectrometry. Two new lignans, (+)-4-(3-methylbutanoyl)-2,6-di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane and (+)-4-hydroxy-2,6-di(3,4-dimethoxy)phenyl-3,7-dioxabicyclo[3.3.0]octane, together with the known lupeol and sitosteryl β- d-glucopyranoside, have been isolated from the roots of Echinops giganteus var. lelyi C. D. Adams (Compositae). The structures were elucidated on the basis of spectral studies and comparison with published data.
ISSN:0031-9422
1873-3700
DOI:10.1016/j.phytochem.2004.05.014