Three New Saponins from Tribulus terrestris
- 1 August 2000
- journal article
- research article
- Published by Georg Thieme Verlag KG in Planta Medica
- Vol. 66 (6) , 545-550
- https://doi.org/10.1055/s-2000-8609
Abstract
Three new steroidal saponins 1 - 3, together with five known steroidal saponins, L-mannitol and an inorganic salt were isolated from Tribulus terrestris L. (Zygophyllaceae). The structures of the new steroidal saponins were elucidated as hecogenin 3-O-β-xylopyranosyl(1→3)-β-glucopyranosyl(1→4)-β-galactopyranoside (1), hecogenin 3-O-β-glucopyranosyl(1→2)-β-glucopyranosyl(1→4)-β-galactopyranoside (2) and 3-O-{β-xylopyranosyl(1→2)-[β-xylopyranosyl(1→3)]-β-glucopyranosyl(1→4)-[α-rhamnopyranosyl(1→2)]-β-galactopyranosyl}-26-O-β-glucopyranosyl-22-methoxy-(3β,5α,25R)-furostan-3,26-diol (3). Structure elucidation was accomplished by 1D and 2D NMR spectra (13C-1H COSY, HMQC, HMBC, 1H-1H COSY, TOCSY, and NOESY), mass spectrometry (FABMS, ESIMS) and chemical methods.Keywords
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