Journal
PHYTOCHEMISTRY LETTERS
Volume 3, Issue 2, Pages 93-95Publisher
ELSEVIER
DOI: 10.1016/j.phytol.2010.02.003
Keywords
Sorghum bicolor var. bicolor (Moench); Structural analysis; NMR; Pyrano-3-deoxyanthocyanidin
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Funding
- Centre National de la Recherche Scientifique (CNRS)
- Universite de Strasbourg (UdS)
- Ministere de l'Enseignement Superieur et de la Recherche
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Polyphenols are widespread components of higher plants. Sorghum is rich in polyphenols and known to contain a specific type, 3-deoxyanthocyanins, many of which remain uncharacterised. Here we report the structural determination of a new pigment isolated from red Sorghum bicolor var. bicolor (Moench) and characterised as 8-hydroxy-2-(4'-hydroxyphenyl)-5-(4 ''-hydroxyphenyl)-pyrano[4,3,2-de]1-ben-zopyrylium by MS, UV-vis and 2D NMR spectroscopy. This new symmetrical pyrano-3-deoxyanthocyanidin, containing apigeninidin as a base unit, displays structural features responsible for higher stability as compared to corresponding anthocyanins. (C) 2010 Phytochemical Society of Europe. Published by Elsevier B. V. All rights reserved.
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