| Literature DB >> 12648551 |
Ammar Bader1, Alessandra Braca, Nunziatina De Tommasi, Ivano Morelli.
Abstract
Two new megastigmane glycosides (1 and 2) and two new flavone glycosides (3 and 4) were isolated from the methanol extract of the whole plant of Caralluma negevensis Zohary (Asclepiadaceae). The structures of the isolated compounds were characterized as (9R)-2beta,9-dihydroxymegastigma-4,7-dien-3-one-9-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (1), 2beta,9-dihydroxymegastigma-4-en-3-one 9-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (2), luteolin 3'-O-beta-D-glucopyranoside-4'-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (3), and luteolin 3',4'-di-O-beta-D-glucopyranoside (4). The structures of the isolated compounds were established on the basis of spectral evidence and chemical transformation. Copyright 2003 Elsevier Science Ltd.Entities:
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Year: 2003 PMID： 12648551 DOI： 10.1016/s0031-9422(02)00678-7
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072