Flavonol Triglycosides from the Leaves of Silphium Albiflorum
| Autor: | Nabil H. El-Sayed, Barry D. Davis, Gábor Tóth, Ahmed A. Ahmed, Małgorzata Wojcińska, Irena Matławska, Jennifer A. Clevinger, Tom J. Mabry, Jeffrey M. Williams |
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| Rok vydání: | 2006 |
| Předmět: |
Pharmacology
chemistry.chemical_classification biology 010405 organic chemistry Silphium Glycoside Plant Science General Medicine Asteraceae biology.organism_classification 01 natural sciences 0104 chemical sciences 010404 medicinal & biomolecular chemistry Complementary and alternative medicine chemistry Genus Drug Discovery Botany |
| Zdroj: | Natural Product Communications. 1:1934578X0600101 |
| ISSN: | 1555-9475 1934-578X |
| DOI: | 10.1177/1934578x0600101105 |
| Popis: | In the course of chemotaxonomic studies of the genus Silphium two new and six known flavonol glycosides were isolated from the leaves of S. albiflorum. The structures of the new flavonoids were established by spectral analysis (1H NMR, 13C NMR, HMQC, HMBC, ROESY, TOCSY, MS) as isorhamnetin 3-O-α-L-rhamnosyl (1′“→6″)-O-β-D-galactopyranoside 7-O-β-D-apiofuranoside (1) and quercetin 3-O-α-L-rhamnosyl (1′“→6″)-O-β-D-galactopyranoside 7-O-β-D-apiofuranoside (2). LC-MS and LC-MSn (with post-column manganese complexation) were applied to elucidate the structures of some of the studied compounds. |
| Databáze: | OpenAIRE |
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