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Semipapposides A-M, triterpenoid bidesmosides saponins from the roots of Scabiosa semipapposa

Abstract : Phytochemical investigations of the roots of Scabiosa semipapposa Salzem ex D.C. have led to the isolation of 12 undescribed triterpenoid saponins named semipapposides A-L, one undescribed saponin semipapposide M obtained as an inseparable mixture, together with three known oleanolic acid glycosides. Their structures were elucidated by analysis of 1D and 2D-NMR (1H–1H COSY, TOCSY, HSQC-TOCSY, HSQC, ROESY or NOESY, and HMBC) spectroscopic data and mass spectrometry (HR-ESI-MS), and by comparison with those of related metabolites. All saponins possess a partial sequence rhamnopyranosyl-(1 → 2)-xylopyranosyl or rhamnopyranosyl-(1 → 2)-arabinopyranosyl- at C-3 of the aglycon and a gentiobiose unit at C-28. These results represent a contribution to the knowledge of the saponins of Scabiosa species and their chemotaxonomy.
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Submitted on : Thursday, September 9, 2021 - 6:19:06 PM
Last modification on : Tuesday, January 4, 2022 - 6:44:47 AM
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Samia Bendamene, Naima Boutaghane, Yuva Bellik, Charlotte Sayagh, Abdulmagid Alabdul Magid, et al.. Semipapposides A-M, triterpenoid bidesmosides saponins from the roots of Scabiosa semipapposa. Phytochemistry, 2020, 180, pp.112526. ⟨10.1016/j.phytochem.2020.112526⟩. ⟨hal-03339952⟩



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