Results 161 to 170 of about 18,747 (206)
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Naphthalene Analogues of Lignans
The Journal of Organic Chemistry, 2002The methodology for the synthesis of podophyllotoxin and thuriferic acid-type lignans has been applied to derivatives carrying a naphthalene moiety. Starting from the 1,3-dithiane of 2-naphthaldehyde afforded the expected analogues in the 2,1-naphthalene series.
Blanca, Madrigal +4 more
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2020
Plant lignans constitute a group of diphenolic compounds, including matairesinol, pinoresinol, medioresinol, lariciresinol, sesamin, syringaresinol, secoisolariciresinol, secoisolariciresinol diglucoside, and hydroxymatairesinol, widely distributed in foods and beverages, of which the most important are whole grains, seeds, nuts, vegetables, berries ...
Knudsen, Knud Erik Bach +4 more
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Plant lignans constitute a group of diphenolic compounds, including matairesinol, pinoresinol, medioresinol, lariciresinol, sesamin, syringaresinol, secoisolariciresinol, secoisolariciresinol diglucoside, and hydroxymatairesinol, widely distributed in foods and beverages, of which the most important are whole grains, seeds, nuts, vegetables, berries ...
Knudsen, Knud Erik Bach +4 more
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Chromatographic analysis of lignans
Journal of Chromatography A, 2006Methods and procedures for analysis of lignans in trees and other plants are reviewed. The importance of cautious sample handling and pretreatment procedures to avoid contamination, loss of sample, and unwanted chemical reactions is discussed. Sequential extraction with a non-polar solvent followed by extraction with acetone or ethanol is recommended ...
S M, Willför, A I, Smeds, B R, Holmbom
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Critical Reviews in Clinical Laboratory Sciences, 2007
This review focuses on the possible role in human health of the consumption of lignan-rich foods. Most of the plant lignans in human foods are converted by the intestinal microflora in the upper part of the large bowel to enterolactone and enterodiol, called mammalian or enterolignans.
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This review focuses on the possible role in human health of the consumption of lignan-rich foods. Most of the plant lignans in human foods are converted by the intestinal microflora in the upper part of the large bowel to enterolactone and enterodiol, called mammalian or enterolignans.
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Biosynthetic relationship of aryltetralin lactone lignans to dibenzylbutyrolactone lignans
Phytochemistry, 1986Abstract Feeding experiments in Podophyllum hexandrum plants have shown that the dibenzylbutyrolactone lignan yatein is a satisfactory precursor of the aryltetralin lignan podophyllotoxin. The corresponding cis isomer of yatein was also incorporated, but to a lesser extent, and probably via yatein.
Widad M. Kamil, Paul M. Dewick
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An Update on Bioactive Plant Lignans
ChemInform, 2005AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Muhammad, Saleem +3 more
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Cytotoxic lignans from Podophyllum, and the nomenclature of aryltetralin lignans
Phytochemistry, 1981Abstract Roots of Podophyllum hexandrum and P. peltatum both contain (1 R ,2 R ,3 R )-desoxypodophyllotoxin [(1α,2α,3β)- desoxypodophyllotoxin] and the previously unreported (1 R ,2 R ,3 R )-podophyllotoxone [(1α,2α,3α)-podophyllotoxone]. Thermal isomerization of (loc,2ct,3fl)-podophyllotoxone readily occurs to yield (1α,2α,3α)-podophyllotoxone ...
Paul M. Dewick, David E. Jackson
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A lignan and a lignan derivative from the fruit of Forsythia suspensa
Phytochemistry Letters, 2019Abstract The chemical investigation of a 95% ethanol extract of the fruit of Forsythia suspensa resulted in the isolation of one new lignan and one new lignan derivative, forsythialan E-F, along with two known lignans. Their structures were established based on extensive spectroscopic data analyses, including UV, IR, HRESIMS, 1D NMR and 2D NMR ...
Chang Li +8 more
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2016
Overview D. Dimmel Determining Lignin Structure by Chemical Degradations C. Lapierre Electronic Spectroscopy of Lignins J. A. Schmidt Vibrational Spectroscopy U. P. Agarwal and R. H. Atalla NMR of Lignins J. Ralph and L. L. Landucci Heteronuclear NMR Spectroscopy of Lignins D. S.
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Overview D. Dimmel Determining Lignin Structure by Chemical Degradations C. Lapierre Electronic Spectroscopy of Lignins J. A. Schmidt Vibrational Spectroscopy U. P. Agarwal and R. H. Atalla NMR of Lignins J. Ralph and L. L. Landucci Heteronuclear NMR Spectroscopy of Lignins D. S.
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