Six steroidal glycosides (1-6) were isolated from the aerial parts of Tribulus alatus Del. (Zygophyllaceae), together with one known cholestane, one spirostane, and six flavonol glycosides. Among them, 1 and 2 possess a furostane-type aglycon, 3 and 6 a cholestane structure, and 4 and 5 a spirostane skeleton. Their structural elucidation was accomplished by extensive spectroscopic methods including 1D (1H, 13C, 13C DEPT, TOCSY, ROESY) and 2D NMR expts. (DQF-COSY, HSQC, HMBC) as well as ESI-MS anal.
Autori interni: | ||
Autori: | A. TEMRAZ; O.D. EL GINDI; H.A. KADRY; N. DE TOMMASI; A. BRACA | |
Titolo: | Steroidal saponins from the aerial parts of Tribulus alatus Del | |
Anno del prodotto: | 2006 | |
Digital Object Identifier (DOI): | 10.1016/j.phytochem.2006.03.007 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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