1: Phytochemistry. 2009 Jan;70(1):86-94. Epub 2008 Dec 4.

Polyphenols isolated from antiradical extracts of Mallotus metcalfianus.

Rivière C, Hong VN, Pieters L, Dejaegher B, Heyden YV, Van MC, Quetin-Leclercq J.

Université Catholique de Louvain, Louvain Drug Research Institute, CHAM Unit, UCL
7230, Avenue E. Mounier 7, B-1200 Brussels, Belgium.

Six flavonoids including two new flavones, luteolin
7-O-(4''-O-(E)-coumaroyl)-beta-glucopyranoside),
chrysoeriol-7-O-(4''-O-(E)-coumaroyl)-beta-glucopyranoside) and a mixture of two 
pairs of diastereoisomeric flavonolignans, (+/-)-hydnocarpin
7-O-(4''-O-(E)-coumaroyl)-beta-glucopyranoside)/(+/-)-hydnocarpin-D
7-O-(4''-O-(E)-coumaroyl)-beta-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.


PMID: 19062052 [PubMed - in process]

Related Links

    Flavonoids from barrel medic (Medicago truncatula) aerial parts. [J Agric Food
Chem. 2007] PMID:17348681

    Acylated flavonol glycosides from leaves of Stenochlaena palustris. [J Nat Prod. 
1999] PMID:9917285

    Spinoside, new coumaroyl flavone glycoside from Amaranthus spinosus. [Arch Pharm 
Res. 2004] PMID:15646794

    Flavones and flavone glycosides from Halophila johnsonii. [Phytochemistry. 2008] 
PMID:18771781

    Antioxidant activity of the main phenolic compounds isolated from hot pepper
fruit (Capsicum annuum L). [J Agric Food Chem. 2005] PMID:15740069