Two new steroidal glucosides from Tribulus terrestris L.

Abstract

Two new furostanol saponins, tribufurosides D (1) and E (2), were isolated from the fruits of Tribulus terrestris L. With the help of chemical and spectral analyses (IR, MS, 1D, and 2D NMR), the structures of the two new furostanol saponins were established as 26-O-β-d-glucopyranosyl-(25S)-5α-furost-12-one-2α,3β,22α,26-tetraol-3-O-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (1) and 26-O-β-d-glucopyranosyl-(25R)-5α-furost-12-one-2α,3β,22α,26-tetraol-3-O-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (2).

Keywords:

• Tribulus terrestris L.
• Zygophyllaceae
• furostanol saponins
• tribufurosides D and E

Acknowledgements

This work was supported by program for New Century Excellent Talents in University and Cooperation Program of Beijing Municipal Education Commission, and National Natural Science Foundation of China (No. 30873357).