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Showing 1 to 5 of 5 for “"Betulin"”.
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Polymers from the natural product betulin : a microstructural investigation
… polymers from an abundant natural resource, betulin, will be presented. Betulin is a large-scale byproduct of the wood industry, and its content in birch bark can reach 30 wt.%. Based on its rigid structure, polymer networks with intrinsic microporosity could be synthesized and characterized. …
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Chemical aspects of saponin bioactivity and ovine photosensitization diseases
… episarsasapogenin β-D-galactoside, betulin 3-(β-D-glucoside) and betulin 3,28-(β-D-diglucoside), was performed via Koenig-Knorr coupling of sarsasapogenin, episarsasapogenin, or betulin with 2,3,4,6-tetra-0-acetyl-α-D-glucopyranosyl bromide, or the corresponding galactoside, followed …
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Chemical investigation of Dicranum fulvum for anticancer activity
… and led to the isolation of three compounds, betulin, 9,l9- cyclolanostâ 23â eneâ 3,25â diol, and B-sitosterol. Purification was achieved by open column, flash column, gel filtration, thin layer chromatography, the chromatotron and crystallization. The isolated compounds were identified by …
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Chemische Modifikation von siRNAs zur Verbesserung der zellulären Aufnahme
… dienten Lithocholsäure, Cholesterin, Betulin und 3-Beta-Cholestanol. Durch kurze organisch chemische Synthesesequenzen wurden diese Verbindungen in das entsprechende Phosphoramidit überführt, um eine Kopplung während der RNA-Festphasensynthese zu ermöglichen. Unter Verwendung …
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Novel natural product based anti-anxiety therapy and natural insecticides
… chromatography of (f1), led to the isolation of betulinic acid (3) as the bioactive constituent in 0.01% of dry weight. Six known pentacyclic triterpenoids [( 1a), (1b), (2a), (2b), ( 4), (5a)], six known flavonoids [(6), ( 7), (8a), (8b), (9), ( 10)], chondrillasterol (11), linolenic acid (12 ) …