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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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Hydrolyzable tannin substances
Chemistry of Natural Compounds, 1975T. K. Chumbalov, T. N. Bikbulatova
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Enzymes in the Biosynthesis of Hydrolyzable Tannins
1992The two classes of hydrolyzable tannins (i.e., gallotannins and ellagitan-nins) have long been postulated to originate from 1,2,3,4,6-pentagalloyl-glucose as their common precursor. The biosynthesis of this pivotal ester was studied with enzymes from oak and sumac leaves. β-Glucogallin (l-O-galloyl-β-D-glucose), the first intermediate of this metabolic
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