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Download e-book for iPad: Comprehensive Natural Products II: Chemistry and Biology: by Lewis Mander, Hung-Wen Liu

By Lewis Mander, Hung-Wen Liu

ISBN-10: 0080453813

ISBN-13: 9780080453811

This paintings offers a definitive interpretation of the present prestige of and destiny tendencies in ordinary products-a dynamic box on the intersection of chemistry and biology excited by isolation, id, constitution elucidation, and chemical features of certainly happening compounds comparable to pheromones, carbohydrates, nucleic acids, and enzymes. With greater than 1,800 colour figures, entire common items II good points a hundred% new fabric and enhances instead of replaces the unique paintings (©1999).* experiences the accrued efforts of chemical and organic examine to appreciate dwelling organisms and their targeted results on overall healthiness and medication * Stimulates new principles one of the proven normal items learn community-which contains chemists, biochemists, biologists, botanists, and pharmacologists * Informs and evokes scholars and beginners to the sphere with available content material in a number of supply codecs  

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Off-line application of mass spectrometry is listed in the column as other methods. Table 4 Secoiridoids Compound Six secoiridoids Oleuropein, ligustaloside A, ligustaloside B, ligstroside Mangiferin, amarogentin, amaroswerin, sweroside, swertiamarin Oleuropein, ligustroside, angustifolioside B Several secoiridoids a Natural product group Acylated secoiridoid glycosides Secoiridoids Secoiridoid glycosides Secoiridoids Secoiridoids Organism HPLC method Detectiona Other methods Reference Gentiana species (Gentianaceae) Ligustrum vulgare (Oleaceae) Swertia chirata (Gentianaceae) Analytical and semipreparative RPC Analytical RPC DAD UV at 200–400 nm MS, TLC, NMR spectroscopy 113 Chionanthus virginicus (Oleaceae) Fraxinus species Analytical RPC DAD UV at 190–450 nm, MS MS Analytical RPC MS Analytical RPC DAD UV at 254 nm, MS 114 115 NMR spectroscopy 116 118 If a particular technique, that is, mass spectrometry is listed in this column, it implies online coupling.

4 Saponins Saponins consist of an aglycone with carbohydrate moieties. The aglycone can be a triterpene or a steroid and can have a number of different substituents (–H, –COOH, –CH3). The number and type of carbohydrate moieties result in a considerable structural diversity of the saponins. , glucose, galactose), 6-deoxyhexoses (rhamnose), pentoses (arabinose, xylose), uronic acid (glucoronic acid), or carbohydrates with amino functionality (glucosamine). Through the glycosylation of the hydrophobic aglycones, they can act as biological detergents and, when agitated in water, form foams, which gave rise to the name, saponin for this group of compounds.

In absinth from Artemisia) and have anti-inflammatory, antibiotic, and in some cases cytotoxic qualities. When they possess exocyclic methyl groups they can react with sulfhydryl groups of, for example, skin or saliva proteins and this may lead to allergic reactions. Thus, sesquiterpenes often protect organisms. For example, in marine green algae (caulerpenyne) they are stored as polyacetates with the deterring sesquiterpene released only upon wounding. The plant hormone abscisic acid is a sesquiterpene and induces fruit ripening and leaf fall.

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Comprehensive Natural Products II: Chemistry and Biology: Modern Methods in Natural Products Chemistry by Lewis Mander, Hung-Wen Liu

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