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Hydrolysable tannins from Euphorbia thymifolia

Phytochemistry, 1990
Abstract Chemical investigation of Euphorbia thymifolia has led to the isolation and characterization of a new hydrolysable tannin named isomallotinic acid, in addition to 15 known tannins. The structure of isomallotinic acid was established on the basis of spectroscopic and chemical evidence.
Takashi Tanaka
exaly   +2 more sources

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.
Takashi Yoshida   +4 more
exaly   +2 more sources

Hydrolysable tannins as chemotaxonomic markers in the rosaceae

Phytochemistry, 1992
Abstract A HPLC survey of leaves of 80 plants (62 species, 15 hybrids, one variety and two cytotypes) from 18 genera of four subfamilies of Rosaceae, using five oligomeric hydrolysable tannins, five monomeric hydrolysable tannins, and chlorogenic acid as reference compounds, showed that the oligomers can be used as chemotaxonomic markers for the ...
Tsutomu Hatano
exaly   +2 more sources

Polyurethanes from hydrolysable tannins obtained without using isocyanates

Industrial Crops and Products, 2014
Abstract Hydrolysable chestnut tannins, which contain several hydroxyl groups, were reacted with dimethyl carbonate, and then with hexamethylenediamine. The dried product was analyzed in MALDI-TOF, 13 C NMR and FTIR spectrometry. The spectra revealed the presence of urethane functions and their yield was relatively high.
Marion Thébault
exaly   +2 more sources

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