Two new 2'-oxygenated flavones from Andrographis elongata
| Autor: | A. Blond, Chunduri Venkata Rao, Bernard Bodo, Pennaka Harikishore, Galla Jayakrishna, Duvvuru Gunasekar |
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| Rok vydání: | 2002 |
| Předmět: |
Spectrometry
Mass Electrospray Ionization food.ingredient Magnetic Resonance Spectroscopy Spectrophotometry Infrared Stereochemistry Flavonoid Molecular Conformation Spectrometry Mass Fast Atom Bombardment Flavones food Glucosides Acanthaceae Drug Discovery Desiccation chemistry.chemical_classification Flavonoids Plant Extracts Hydrolysis Glycoside Acetylation General Chemistry General Medicine Nuclear magnetic resonance spectroscopy Andrographis Heteronuclear molecule chemistry Spectrophotometry Ultraviolet Two-dimensional nuclear magnetic resonance spectroscopy Heteronuclear single quantum coherence spectroscopy |
| Zdroj: | Chemicalpharmaceutical bulletin. 49(12) |
| ISSN: | 0009-2363 |
| Popis: | Two new 2'-oxygenated flavones, 5,2',6'-trihydroxy-7-methoxyflavone (3) and skullcapflavone I 2'-O-beta-D-(4"-E-cinnamyl) glucopyranoside (5), together with three known flavones, 7-O-methylwogonin (1), skullcapflavone I (2) and skullcapflavone I 2'-O-beta-D-glucopyranoside (4) were isolated from the whole plant of Andrographis elongata, and the structures were elucidated by FAB-MS and one- and two-dimensional (1D- and 2D)-NMR spectral studies including 1H-1H correlation spectroscopy (COSY), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and rotating frame Overhauser enhancement spectroscopy (ROESY) experiments, and chemical studies. |
| Databáze: | OpenAIRE |
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