Two Bioactive Saponins from <i>Albizia </i><i>s</i><i>ubdimidiata </i>from the Suriname Rainforest
作者:Maged Abdel-Kader、Jeannine Hoch、John M. Berger、Randy Evans、James S. Miller、Jan H. Wisse、Stephen W. Mamber、James M. Dalton、David G. I. Kingston
DOI:10.1021/np000295u
日期:2001.4.1
Bioassay-guided fractionation of a methanol extract of Albizia subdimidiata using the engineered yeast strains 1138, 1140, 1353, and Sc7 of Saccharomyces cerevisiae as the bioassay tool resulted in the isolation of the two active saponins 1 and 2; one of these, albiziatrioside A (1), is described for the first time. The structures of 1 and 2 were established on the basis of HRMS, 1D and 2D NMR spectral data. and GCMS analysis of the sugar units. Both isolated compounds showed significant cytotoxicity against the A2780 cell line.
New TriterpenoidN-Acetylglycosides with Molluscicidal Activity fromTetrapleura tetraptera TAUB
作者:Marc Maillard、Kurt Hostettmann、Clement O. Adewunmi
DOI:10.1002/hlca.19890720407
日期:1989.6.14
extract of the fruits of Tetrapleuratetraptera TAUB. (Mimosaceae) afforded 4 saponins 1–4, which exhibited strong molluscicidal properties against the schistosomiasis-transmitting snails Biomphalaria glabrata. Chemical, enzymatic, and spectral methods (DCI-MS, 1H-NMR, 13C-NMR) showed that they were N-acetylglycosides of oleanolic acid and of echinocystic acid. Apart from saponin 1 (aridanin), previously