Cycloartane triterpene glycosides from the roots of Astragalus gilvus Boiss

WOS: 00023207420000

Iridoids from Scabiosa atropurpurea L. subsp. maritima Arc. (L.)

[No abstract available

Triterpene saponins from Knautia integrifolia var. bidens

WOS: 000222951900012Two new triterpene saponins (1 and 2), named bidenosides A and B, were isolated from the roots of Knautia integrifolia var. bidens. The structures were identified as 3-O-alpha-L-rhanmopyranosyl-28-O-[beta-D-allopyranosyl-(1 --> 6)-beta-D-glucopyranosyl]-pomolic acid, and 3-O-alpha-L-rhamnopyranosyl-28-O-[beta-D-allopyranosyl-(1 --> 6)-beta-D-glucopyranosyl]-oleanolic acid on the basis of spectroscopic evidence

Saponins from Astragalus pycnocephalus var. pycnocephalus FISCHER and their alpha/beta-glucosidase inhibitory effects

59th International Congress and Annual Meeting of the Society-for-Medicinal-Plant-and-Natural-Product-Research -- SEP 04-09, 2011 -- Antalya, TURKEYWOS: 000294139000856Soc Med Plant & Nat Prod Re

Saponins from Styrax officinalis

WOS: 000177147600008PubMed ID: 12234576Three triterpene saponins named Styrax-saponin A-C (1-3) were found in pericarps of Styrax officinalis together with the deacylsaponin (4). Structural determinations were achieved using 1D-, 2D-NMR and mass spectrometry. (C) 2002 Elsevier Science B.V. All rights reserved

Triterpene glycosides from astragalus angustifolius

PubMed ID: 22437244Six new cycloartane-type (1-6) and four new oleanane-type (7-10) triterpene glycosides were isolated from Astragalus angustifolius Lam., together with five known triterpene glycosides. Their structures were established by the extensive use of 1D and 2D-NMR experiments along with ESIMS and HRMS analysis. Compounds 1-3 are glycosides of cycloastragenol, while compounds 4-6 show the C-24 epimer of cycloastragenol as aglycone, encountered for the first time in nature. All compounds were evaluated for their antiproliferative activity in Hela, H-446, HT-29, and U937 cell lines. Only compound 8 displayed a weak activity with IC 50 values of 36 and 50 µM against Hela and HT-29 cell lines, respectively. © Georg Thieme Verlag KG Stuttgart · New York

New oleanane-type saponins from Astragolus flavescens

55th Annual Congress of the Society-for-Medicinal-Plant-Research -- SEP 02-06, 2007 -- Karl Franzens Univ, Graz, AUSTRIAWOS: 000249395900499Soc Med Plant Re

High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis

WOS: 000088382300011The fluorescent properties of several natural benzofuran derivatives, egonols, isolated from Styrax officinalis, were determined. The studied egonol derivatives were found to be effective UV organic luminophores, with quantum yields of near to unity, phi(f) = 0.92. The fluorescence quenching experiments with electron donor molecules of aniline, N,N-dimethylaniline and carbazolocarbazole, presented very high efficiency of quenching at above diffusion quenching rates of 4.5x10(10), 2.1x10(x) and 5.6x10(12) s(-1)mol(-1), respectively. A strong electron acceptor molecule, tetranitrofluorenone, presented quenching rate of 2.6x10(11) s(-1)mol(-1). It is concluded that the first excited singlet state of egonol molecule is a more efficient electron acceptor