Results 241 to 250 of about 34,077 (277)
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Phytotoxic lignans ofLeucophyllum frutescens
Natural Toxins, 1999Bioassay-guided fractionation of the hexane:ethyl acetate (1:1) extract of the leaves of Leucophyllum frutescens (Berl.) I.M.Johnst (Scrophulariaceae) led to the isolation of its phytotoxic constituents diayangambin (1), epiyangambin (2), diasesartemin (3) and epiashantin (4). Phytotoxicity was demonstrated as inhibition of seed germination of Agrostis
A M, Rimando +3 more
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Polycyclic Spiro Lignans and Biphenyl Tetrahydrofuranone Lignans from Gymnotheca involucrata
Planta Medica, 2016Four rare polycyclic spiro lignans (1-4) and four new biphenyl tetrahydrofuranone lignans (5-8) were isolated from the whole plant of Gymnotheca involucrata. The structures of the new compounds were elucidated on the basis of detailed spectroscopic analysis and the absolute configuration of 1 was confirmed by single crystal X-ray diffraction.
Shi-Ji, Xiao +7 more
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Antioxidant Lignans from Larrea tridentata
ChemInform, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Abou-Gazar H. +4 more
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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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Lignans have garnered significant interest in various fields of pharmaceuticals, nutrition, and pesticides due to their diverse biological activities. This chapter primarily focuses on the extraction and purification methods of lignans from Schisandra, followed by an extensive examination of qualitative and quantitative analytical techniques, including
Hye Mi Kim, Chul Young Kim
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Hye Mi Kim, Chul Young Kim
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Lignans from cultivated Gynuranepalensis
China Journal of Chinese Materia Medica, 2016Taking application of some isolation and purification technologies, including solvent extraction, rude solvent isolation, column chromatographies on silica gel and Sephadex LH-20 , and preparative HPLC , 4 compounds were obtained from Gynura nepalensis cultivated in a suburban area of Beijing.
Zhi-Hui, Zhang +6 more
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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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Phytochemistry, 1991
Abstract From a methylene chloride extract of the roots of Krameria ixina nine new neolignans/ nor -neolignans besides 24-methylenecycloartanol and eight further lignan-type compounds already known from other Krameriaceae were isolated.
Hans Achenbach +3 more
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Abstract From a methylene chloride extract of the roots of Krameria ixina nine new neolignans/ nor -neolignans besides 24-methylenecycloartanol and eight further lignan-type compounds already known from other Krameriaceae were isolated.
Hans Achenbach +3 more
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