Results 231 to 240 of about 34,077 (277)
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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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Journal of Natural Products, 1998
Three new (1, 3, 4) and two known lignans (2 and 5) were isolated from Chilean propolis. Compound 1 was identified as a trimeric coniferyl alcohol acetate and 3 as the diastereomer of the dimeric coniferyl alcohol acetate 2. Compound 4 was identified as a dihydrobenzofuran lignan aldehyde, which was isolated together with the related known acetate 5.
S, Valcic +2 more
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Three new (1, 3, 4) and two known lignans (2 and 5) were isolated from Chilean propolis. Compound 1 was identified as a trimeric coniferyl alcohol acetate and 3 as the diastereomer of the dimeric coniferyl alcohol acetate 2. Compound 4 was identified as a dihydrobenzofuran lignan aldehyde, which was isolated together with the related known acetate 5.
S, Valcic +2 more
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Lignans from Phyllanthus urinaria
Phytochemistry, 2003Chemical investigation on the aerial and the root parts of Phyllanthus urinaria L. culminated in the isolation of four lignans, namely 5-demethoxyniranthin, urinatetralin, dextrobursehernin, urinaligran, together with nine known lignans. Their structures, including the absolute stereochemistry, were elucidated by spectral analysis (NMR and CD) and ...
Chia-Chuan, Chang +3 more
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1990
Lignans are widely occurring plant compounds and are closely related to lignin, which forms the woody component of trees and other plants. The lignans are characterized by their dimeric composition from cinnamic acids, and they are attracting increasing attention as a result of their pharmacological properties.
David C. Ayres, John D. Loike
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Lignans are widely occurring plant compounds and are closely related to lignin, which forms the woody component of trees and other plants. The lignans are characterized by their dimeric composition from cinnamic acids, and they are attracting increasing attention as a result of their pharmacological properties.
David C. Ayres, John D. Loike
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Lignans from machilus thunbergii
Phytochemistry, 1987Abstract Five new lignans, machilin A[(2S,3R)-2,3-dimethyl-1,4-dipiperonyl-butane], machilin B [(2S,3S)-2,3-dihydro-7-methoxy-3-methyl-2-piperon threo-2-(2-methoxy-4-trans-propenylphenoxy)-1-(4-hydroxy-3-methoxyphenyl)propan-1-ol], machilin E (erythro-1-acetoxy-2-(2-methoxy-4-trans-(3-hydroxy-1-propenyl)phenoxy]-l-piperonylpropane) were isolated from
Hiroko Shimomura +2 more
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Phytochemistry, 2000
Two new cyclobutane-type lignans, named moslolignans A and B, together with two known ones, andamanicin and magnosalin, were isolated from the whole plant of Mosla scabra. Their structures were established as 1beta*,2beta*,3alpha*,4alpha*-1,2-dimethyl-3-(3- methoxy-4,5-methylene-dioxyphenyl)-4-(2,4,5-trimethoxyphenyl)-cycl obutane and 1beta*,2beta ...
Wang, Q. +4 more
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Two new cyclobutane-type lignans, named moslolignans A and B, together with two known ones, andamanicin and magnosalin, were isolated from the whole plant of Mosla scabra. Their structures were established as 1beta*,2beta*,3alpha*,4alpha*-1,2-dimethyl-3-(3- methoxy-4,5-methylene-dioxyphenyl)-4-(2,4,5-trimethoxyphenyl)-cycl obutane and 1beta*,2beta ...
Wang, Q. +4 more
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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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Lignans from Larrea divaricata
Journal of Pharmaceutical Sciences, 1974Abstract A phytochemical reinvestigation of the phenolics of Larrea divaricata led to the isolation and characterization of dihydroguaiaretic acid, norisoguaiacin, and 3'-demethoxyisoguaiacin. Partially demethylated dihydroguaiaretic acid was detected via the use of partially demethylated dihydroguaiaretic acid synthesized from dihydroguaiaretic ...
O, Gisvold, E, Thaker
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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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