Results 151 to 160 of about 3,648 (192)

Dimeric hydrolysable tannins from melastoma Malabathricum

Phytochemistry, 1992
Abstract Three new hydrolysable tannin dimers, malabathrins B, C and D, and 11 known tannins including three dimers (nobotanins B, G and H) and a trimer (nobotanin J), have been isolated from the leaves of Melastoma malabathricum. The structures of new dimers were determined by spectral analysis and chemical correlations with nobotanins B and J.
Aya Nitta
exaly   +2 more sources

Seasonal variation in the content of hydrolysable tannins in leaves of Betula pubescens

Phytochemistry, 2001
The contents of 13 hydrolysable tannins in the leaves of white birch (Betula pubescens L.) trees were analysed at twelve stages throughout the growing season. All individual galloylglucoses, from 1-O-galloyl-beta-D-glucopyranose to 1,2,3,4,6-penta-O-galloyl-beta-D-glucopyranose, accumulated in young leaves, while ellagitannins showed significantly ...
Juha-Pekka Salminen, Vladimir Ossipov, Kalevi Pihlaja   +2 more
exaly   +3 more sources

Scope of Hydrolysable Tannins as Possible Antimicrobial Agent

Phytotherapy Research, 2016
Sanmuga Priya Ekambaram
exaly   +2 more sources

Antimicrobial and Antiviral Activity of Hydrolysable Tannins

Mini-Reviews in Medicinal Chemistry, 2008
Hydrolysable tannins (HTs), secondary metabolites widely distributed in the plant kingdom, are generally multiple esters of gallic acid with glucose. HTs have been shown to be effective antagonists against viruses, bacteria and eukaryotic microorganisms.
P. Buzzini, P. Arapitsas, M. Goretti, E. Branda, B. Turchetti, PINELLI, PATRIZIA, IERI, FRANCESCA, ROMANI, ANNALISA   +7 more
openaire   +4 more sources

Oligomeric hydrolysable tannins from Tibouchina multiflora

Phytochemistry, 1999
Two hydrolysable tannins, nobotanin O and nobotanin P, were isolated from the leaf extract of Tibouchina multiflora (Melastomataceae) and their dimeric and tetrameric structures elucidated on the basis of spectral data and chemical correlations with nobotanin B and K, respectively. Thirteen known hydrolysable tannins including nobotanins A, B, C and J,
T, Yoshida, Y, Amakura, N, Yokura, H, Ito, J H, Isaza, S, Ramirez, D P, Pelaez, S S, Renner   +7 more
openaire   +2 more sources

Monomeric and dimeric hydrolysable tannins of Tamarix nilotica

Phytochemistry, 2009
An ellagitannin monomer, nilotinin M1 (1), and three dimers, nilotinins D1 (2), D2 (3), and D3 (4), were isolated from leaves of Tamarix nilotica (Ehrenb.) Bunge. Structures were elucidated based on analysis of spectroscopic data and chemical correlations with known compounds.
Mohamed A A, Orabi, Shoko, Taniguchi, Tsutomu, Hatano   +2 more
openaire   +2 more sources

A dimeric hydrolysable tannin from Camellia oleifera

Phytochemistry, 1994
Camellioferin A, a new dimeric ellagitannin, was isolated, together with 13 known tannins, including camellins A and B, from Camellia oleifera. The structure of the new tannin elucidated by spectroscopic methods.
T, Yoshida, T, Nakazawa, T, Hatano, R C, Yang, L L, Yang, K Y, Yen, T, Okuda   +6 more
openaire   +2 more sources

Condensed and Hydrolysable Tannins as Antioxidants Influencing the Health

Mini-Reviews in Medicinal Chemistry, 2008
Natural polyphenols are a wide class of secondary plant metabolites and represent an abundant antioxidant component of human diet. An important, but often neglected group of natural polyphenols, are tannins. This review offers a general description of chemistry of both hydrolysable and condensed tannins (proanthocyanidins), the mechanisms of their ...
Vit, Koleckar, Katerina, Kubikova, Zuzana, Rehakova, Kamil, Kuca, Daniel, Jun, Ludek, Jahodar, Lubomir, Opletal   +6 more
openaire   +2 more sources

Hydrolysable tannins of Eucalyptus delegatensis wood

Phytochemistry, 1970
Abstract Five ellagitannins have been isolated from the wood of Eucalyptus delegatensis by fractionation with Sephadex and characterized by hydrolysis reactions and NMR spectra. They include 2,3- and 4,6-(hexahydroxydiphenoyl)-glucose, a di-(hexahydroxydiphenoyl)-glucose known as pedunculagin, and two more complex tannins of incompletely determined ...
Margaret K. Seikel, W.E. Hillis
openaire   +1 more source

Hydrolysable tannins from Loropetalum chinense

Phytochemistry, 1993
Abstract Three new oligomeric hydrolysable tannins, loropetalins A-C, were isolated from Loropetalum chinense and their structures elucidated by spectral and chemical methods. Eighteen known tannins and related polyphenols, including oligomeric hydrolysable tannins (camelliin B and rugosins D, E and G), were also isolated.
Takashi Yoshida, Shigeharu Tanei, Yan-Ze Liu, Ke Yuan, Chun-Ru Ji, Takuo Okuda   +5 more
openaire   +1 more source