Three new saponins from Tribulus terrestris |
| |
Authors: | Xu Y X Chen H S Liang H Q Gu Z B Liu W Y Leung W N Li T J |
| |
Institution: | Department of Phytochemistry, College of Pharmacy, Second Military Medical University, Shanghai, People's Republic of China. |
| |
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-beta-xylopyranosyl(1-->3)-beta-glucopyranosyl(1-->4)-beta-galactopyr anoside (1), hecogenin 3-O-beta-glucopyranosyl(1-->2)-beta-glucopyranosyl(1-->4)- beta-galactopyranoside (2) and 3-O-beta-xylopyranosyl(1-->2)-beta-xylopyranosyl(1-->3)]-beta- glucopyranosyl(1-->4)-alpha-rhamnopyranosyl(1-->2)]-beta-galactopyranos yl]- 26-O-beta-glucopyranosyl-22-methoxy-(3 beta,5 alpha,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: | |
本文献已被 PubMed 等数据库收录! |
|