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Volume 63, Issue 7, August 2003, Pages 783–787
Anthocyanins from flowers of the orchids Dracula chimaera and D. cordobae
Abstract
The main anthocyanins from flowers of the orchids Dracula chimaera and D. cordobae were isolated from a purified methanolic extract by preparative HPLC. Their structures were determined to be cyanidin 3-O-(6″-O-malonyl-β-glucopyranoside), cyanidin 3-O-(6″-O-α-rhamnopyranosyl-β-glucopyranoside), cyanidin 3-O-β-glucopyranoside, peonidin 3-O-(6″-O-α-rhamnopyranosyl-β-glucopyranoside) and peonidin 3-O-(6″-O-malonyl-β-glucopyranoside).
The structure determinations were mainly based on extensive use of 2D
and 1D NMR spectroscopy, UV–vis spectroscopy and MS. The anthocyanin
contents of species belonging to the subtribe Pleurothallidinae
including genus Dracula Luer (Orchidaceae) have previously not been determined. The high content of anthocyanin rutinosides found in D. chimaera and D. cordobae
(78 and 28% of the total anthocyanin content, respectively) differs
from previously analysed orchid species, in which glucose is found as
the only anthocyanin sugar moiety.
The 3-O-(6″-O-malonyl-β-glucopryanoside) of cyanidin and peonidin, respectively, have been isolated from acidified, methanolic extracts of Dracula chimera and D. cordobae.
Keywords
- Orchidaceae;
- Pleurothallidinae;
- Dracula chimaera;
- Dracula cordobae;
- Flowers;
- Anthocyanins;
- Chemotaxonomy;
- NMR;
- MS
- Corresponding author. Tel.:
+47-55-58-82-44; fax: +47-55-58-94-90
Copyright © 2003 Elsevier Ltd. All rights reserved.
Dracula chimaera
Wikipedia
Dracula chimaera – the giant fire-breathing monster http://orchidkarma.com/dracula-chimaera-the-giant-fire-breathing-monster/
