Isolation and structure elucidation of tannins

  title={Isolation and structure elucidation of tannins},
  author={Gen-ichiro Nonaka},
  journal={Pure and Applied Chemistry},
  pages={357 - 360}
  • G. Nonaka
  • Published 1 January 1989
  • Chemistry
  • Pure and Applied Chemistry
Tannin structural elucidation and quantitative ³¹P NMR analysis. 2. Hydrolyzable tannins and proanthocyanidins.
An unprecedented analytical method that allows simultaneous structural and quantitative characterization of all functional groups present in tannins is reported, with significant implications for the fields of food and feed analyses, tannery, and the development of natural polyphenolics containing products.
Study on the composition and structure of commercial chestnut tanning agent.
Two chestnut tannins, vescalagin and castalagin, have been isolated using chromatography on Sephadex LH-20 and cellulose andStructural features of these compounds provide a better understanding of the mode of action of complex commercial chestnuts tannin extracts.
Novel metabolites of hexahydroxydiphenic acid esters (ellagitannins) from Carpinus japonica
The unique hydrated biscyclohexenetrione structures (1)–(4) of carpinins A–D, the metabolites of hexahydroxydiphenic acid esters (ellagitannins) isolated from the leaves of Carpinus japonica, are
Pharmacologically active tannins isolated from medicinal plants.
Noticeable biological and pharmacological activities (inhibition of carcinogenesis, host-mediated antitumor activity, antiviral activity, and inhibition of active oxygen, such as inhibition of lipid peroxidation and lipoxygenase, xanthine oxidase, and monoamine oxidase) have been found for several polyphenolic compounds.
Tannin structural elucidation and quantitative ³¹P NMR analysis. 1. Model compounds.
The development of a new analytical method employing an in situ labeling of all labile H groups (aliphatic OH, phenolic OH, and carboxylic acids) with a phosphorus reagent allowed the unprecedented quantitative and qualitative structural characterization of hydrolyzable tannins, proanthocyanidins, and catechin tannin model compounds.
A new sesquiterpene lactone glycoside and a new quinic acid methyl ester from Patrinia villosa
A new sesquiterpene lactone glycoside and a new quinic acid methyl ester were isolated from Patrinia villosa and their structures were established using 1D/2D-NMR spectroscopy, mass spectrometry, and comparing with spectroscopic data reported in the literature.
Phenolic Compounds in Trees and Shrubs of Central Europe
This paper presents the results of literature studies conducted to systematise the knowledge on phenolic compounds found in trees and shrubs native to central Europe, and indicates gaps in the present knowledge.


G.Nonaka and I .N ish ioka
  • 1987