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ChemInform Abstract: Hydrolyzable Tannins and Related Polyphenols
ChemInform, 1996AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
T. OKUDA, T. YOSHIDA, T. HATANO
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Combreglutinin, a Hydrolyzable Tannin from Combretum glutinosum
Journal of Natural Products, 1994Combreglutinin [4], a hydrolyzable tannin, was isolated from the leaves of Combretum glutinosum, and its macrocyclic structure was established on the basis of 1 H- and 13 C-nmr and 2D nmr spectroscopic data and by chemical methods. The three known tannins 2,3-(S)-hexahydroxydiphenoyl-D-glucose [1], punicalin [2], and punicalagin [3] were also ...
Akino Jossang +2 more
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Hydrolyzable Tannins and Related Polyphenols fromEucalyptus globulus
Journal of Asian Natural Products Research, 2000Eucaglobulin (1), a new complex of gallotannin and monoterpene, was isolated from the leaves of Eucaloptus globulus. Its structure was elucidated on the basis of spectral data. Four known hydrolyzable tannins [tellimagrandin I (2), eucalbanin C (3), 2-O-digalloyl-1,3,4-tri-O-galloyl-beta-D-glucose (4), 6-O-digalloyl-1,2,3-tri-O-galloyl-beta-D-glucose ...
A J, Hou +4 more
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Antinutritional Effects of Condensed and Hydrolyzable Tannins
1992Despite major structural differences, hydrolyzable and condensed tannins often produce similar antinutritional effects. The most common effects are diminished weight gains and lowered efficiency of nutrient utilization. The major biochemical basis for these effects appears not to be inhibition of dietary protein digestion but rather a systemic ...
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Preparation of antibodies against hydrolyzable plant tannins
Phytochemical Analysis, 1998Polyclonal antibodies were raised against covalently protein-coupled 1,2,3,4,6-pentagalloylglucose, the common and immediate precursor of the two subclasses of hydrolyzable tannins, i.e. the polyphenolic gallotannins and ellagitannins. The crude antisera were efficiently purified by affinity-chromatography on pentagalloylglucose-substituted Sepharose ...
Daniela Kaspar +2 more
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Antitumor-promoting activities of hydrolyzable tannins in mouse skin
Carcinogenesis, 1992Ellagic acid and gallic acid and its derivatives, applied topically to female CF-1 mice 20 min before each 12-O-tetradecanoylphorbol-13-acetate (TPA) treatment inhibit the inductions of epidermal ornithine decarboxylase activity, hydroperoxide production and DNA synthesis caused by this potent tumor promoter in relation with their abilities to inhibit ...
H U, Gali +4 more
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Hydrolyzed Tannins of Euphorbia glareosa Leaves. Structure of Glarein C
Chemistry of Natural Compounds, 2000The structure of glarein, a new hydrolyzed tannin from Euphorbia glareosa Pall. ex Bieb. leaves, was established using physicochemical properties of the compound itself, its hydrolysis products, and IR, UV, and PMR spectra.
L. N. Gvazava, M. D. Alaniya
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Hydrolyzable Tannins having a Depsidone-forming Valoneoyl Group
HETEROCYCLES, 1990The orientation of the valoneoyl group in praecoxins C and D as in the structures of praecoxins C and D was unequivocally proved by the 1 H- 13 C long-range shift correlation spectrum of rugosin C which was chemically correlated with praecoxin ...
Takuo Okuda +6 more
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Gallic Acid Derivatives and Hydrolyzable Tannins
1989Gallic acid and its derivatives as they occur in extracts of oak-galls constitute a chemical reagent of considerable antiquity. The blue-black color produced when an aqueous infusion is treated with salts of iron was first described by Pliny; its use in the analysis of mineral waters and as a component of invisible ink were noted as early as the ...
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Correlation of oxidative transformations of hydrolyzable tannins and plant evolution
Phytochemistry, 2000The progressive oxidative transformations in the biogenesis of hydrolyzable tannins, gallotannin (I) --> ellagitannin (II) --> dehydro ellagitannin (III) --> transformed dehydroellagitannin (IV), conform in several aspects to the evolutionary routes in the subclasses of Dicotyledonae, particularly in the Rosidae.
T, Okuda, T, Yoshida, T, Hatano
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