Title
New flavonoids from **Boldoa purpurascens** Cav. New flavonoids from **Boldoa purpurascens** Cav.
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Stuttgart ,
Subject
Biology
Pharmacology. Therapy
Source (journal)
Planta medica: natural products and medicinal plant research. - Stuttgart
Volume/pages
74(2008) , p. 1468-1473
ISSN
0032-0943
ISI
000260253600010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Phytochemical analysis of the leaves of Boldoa purpurascens Cav. led to isolation of four flavone glycosides, three of which are new compounds. Their structures have been determined by mass spectrometry and by 1 D and 2 D NMR analysis, i.e., 4',5-dihydroxy-6,7-methylenedioxyflavonol 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-xylopyranoside (1), 4',5-dihydroxy-6,7-methylenedioxyflavonol 3-O-beta-D-xylopyranoside (2), and 4',5-dihydroxy-6,7-methylenedioxyflavonol 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-glucopyranoside (3). The known compound was 4',5-dihydroxy-6,7-methylenedioxyflavonol 3-O-beta-D-glucopyranoside (4). The aglycone 4',5-dihydroxy-6,7-methylenedioxyflavonol is known as gomphrenol. Compounds 1 and 2 failed to show antifungal activity when tested against three different strains of fungi, i.e., Fusarium culmorum, Botrytis cinerea, and Aspergillus flavus.
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