Two new steroidal glycosides isolated from the aerial part of Solanum torvum Swartz

Abstract

One novel C-22 steroidal lactone saponin, namely solanolactoside C (1), and one new spirostanol glycoside, namely torvoside Q (2), were isolated from the ethanolic extract of aerial parts of Solanum torvum Swartz. The structures of 1 and 2 were determined by extensive NMR experiments including ¹H NMR, ¹³C NMR, DEPT, ¹H–¹H COSY, HSQC, HMBC and ROESY and HRESIMS to be solanolide 6-O-β-d-quinovopyranoside and neochlorogenin 6-O-[β-d-xylopyranosyl-(1 → 3)-β-d-glucopyranoside], respectively.

Keywords::

• Solanum torvum Swartz
• steroidal glycoside
• solanolactoside C
• torvoside Q

Acknowledgements

This work was financially supported by the Team Project of Natural Science Foundation of Guangdong Province (8351063201000003) and the Chinese National S&T Special Project on Major New Drug Innovation (2011ZX09307-002-01).