| Literature DB >> 22917955 |
Pieter B Venter1, Nadine D Senekal, Gabré Kemp, Maryam Amra-Jordaan, Pir Khan, Susan L Bonnet, Jan H van der Westhuizen.
Abstract
Wattle (Acacia mearnsii) bark extract is an important renewable industrial source of natural polymers for leather tanning and adhesive manufacturing. The wattle bark proanthocyanidin oligomers have 5-deoxy extender units that render the interflavanyl bonds resistant to acid catalysed hydrolysis and their composition cannot be determined via conventional thiolysis. We combined established phyto- and synthetic chemistry perspectives with an electrospray mass spectrometry investigation to establish that the flavan-3-ol based oligomers consist of a starter unit which is either catechin or gallocatechin, angularly bonded to fisetinidol or predominantly robinetinidol extender units.Entities:
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Year: 2012 PMID： 22917955 DOI： 10.1016/j.phytochem.2012.07.012
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072