Three new bisdesmosidic triterpene saponins, zygophylosides I (1), L (2) and M (3), and three known quinovic acid glycosides were isolated from Zygophyllum gaetulum. The new compounds were determined to be 3β-O-α-L- rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl-(1→2)-β-D-glucopyranosylurs- 20(21)-en-28-oic acid 28-O-[β-D-2-O-sulfonylglucopyranosyl] ester (1), 3β- O-[α-L-rhamnopyranosyl(1→2)-α-L-arabinopyranosyl(1→2)-β-D- glucopyranosyl]urs-20(21)-en-28-oic acid 28-O-[β-D-glucopyranosyl] ester (2), and 3β-O-β-D-quinovopyranosyl-27-nor-olean-12-en-28-oic acid 28-O-β- D-glucopyranosyl ester (3) by use of 1D and 2D NMR techniques.
Magnetic Resonance Spectroscopy, saponins, triterpenes, medicinal plants, Zygophyllum gaetulum
NCBI PubMed ID: 9461662Publication DOI: 10.1021/np970245yJournal NLM ID: 7906882Publisher: American Society of Pharmacognosy
Institutions: Dipartimento di Scienze Farmaceutiche, Università di Salerno, Salerno, Italy, Laboratoire de Chimie des Plantes et de Synthèse Organique et Bioorganique, Faculté des Sciences, Rabat, Morocco, Dipartimento di Chimica delle Sostanze Naturali, Università 'Federico II', Napoli, Italy
Methods: 13C NMR, 1H NMR, FAB-MS, HPLC, optical rotation measurement, ROESY, TOCSY, CC, DQF-COSY, HMBC, DEPT, COSY, HSQC
Found