Title
Polyphenols isolated from antiradical extracts of **Mallotus metcalfianus** Polyphenols isolated from antiradical extracts of **Mallotus metcalfianus**
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Oxford ,
Subject
Pharmacology. Therapy
Source (journal)
Phytochemistry: an international journal of plant biochemistry. - Oxford
Volume/pages
70(2009) :1 , p. 86-94
ISSN
0031-9422
ISI
000264235800010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Six flavonoids including two new flavones, luteolin 7-O-(4-O-(E)-coumaroyl)-À-glucopyranoside), chrysoeriol-7-O-(4-O-(E)-coumaroyl)-À-glucopyranoside) and a mixture of two pairs of diastereoisomeric flavonolignans, (})-hydnocarpin 7-O-(4-O-(E)-coumaroyl)-À-glucopyranoside)/(})-hydnocarpin-D 7-O-(4-O-(E)-coumaroyl)-À-glucopyranoside) with a 2:1 ratio were isolated from the whole plant of Mallotus metcalfianus Croizat, in addition to 10 known compounds. Their structures were evaluated on the basis of different spectroscopic methods, including extensive 1D and 2D NMR spectroscopy. Some extracts have moderate antimicrobial properties and interesting antiradical (DPPH) activity, as well as some compounds isolated from this species. Tannins were also identified in some active extracts.
E-info
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