Search results for "SAP"
showing 10 items of 1142 documents
Bafouoside C, a new triterpenoid saponin from the roots of Cussonia bancoensis Aubrev. & Pellegr.
2014
Abstract A new triterpenoid saponin named bafouoside C 3-O-β- d -glucopyranosyl-(1 → 4)-[β- d -galactopyranosyl-(1 → 2)]-β- d -glucuronopyranosyloleanolic acid 28-O-β- d -glucopyranosyl ester; (1), together with five known compounds 3-O-β- d -galactopyranosyl-(1 → 2)-β- d -glucuronopyranosyloleanolic acid (2), 23-hydroxyursolic acid (3), 28-O-α- l -rhamnopyranosyl-(1 → 4)-O-β- d -glucopyranosyl-(1 → 6)-O-β- d -glucopyranosyl-23-hydroxyursolic acid (4), 3-O-β- d -glucopyranosyl-23-hydroxyursolic acid (5), and 3-O-α- l -arabinopyranosyl-23-hydroxyursolic acid (6), were isolated from the roots of Cussonia bancoensis Aubrev. & Pellegr. Their structures were established on the basis of 1D- and 2…
A New Steroidal Saponin from Dioscorea cayenensis
2004
The new 26-O-beta-D-glucopyranosyl-3beta,26-dihydroxy-20,22-seco-25(R)-furost-5-en-20,22-dione-3-O-alpha-L-rhamnopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->4)-[alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-glucopyranoside (1), along with the known methyl protodioscin (2), asperoside (3) and prosapogenin A of dioscin (4) were isolated from the rhizomes of Dioscorea cayenensis LAM.-HOLL (Dioscoreaceae). Their structures were established mainly on the basis of 600 MHz 2D-NMR spectral data. 4 exhibited antifungal activity against the human pathogenic yeasts Candida albicans, C. glabrata and C. tropicalis (MICs of 20.8, 6.25, 25 microg/ml, respectively), whereas saponins 1-3 were inactive.
Spirostane and cholestane glycosides from the bulbs of Allium nigrum L
2011
Abstract A phytochemical investigation of the fresh bulbs of Allium nigrum L. led to the isolation of new spirostane-type glycosides as two inseparable isomer mixtures, nigrosides A1/A2 (1a/1b) and nigrosides B1/B2 (2a/2b), two new cholestane-type glycosides, nigrosides C and D (3 and 4), together with the known compounds, 25(R,S)-5α-spirostan-2α,3β,6β-trio1-3-O-β- d -glucopyranosyl-(1 → 2)-O-[β- d -xylopyranosyl-(1 → 3)]-O-β- d -glucopyranosyl-(1 → 4)-β- d -galactopyranoside (5a/5b) and 25(R,S)-5α-spirostan-2α,3β,6β-trio1 3-O-β- d -glucopyranosyl-(1 → 2)-O-[4-O-(3S)-3-hydroxy-3-methylglutaryl-β- d -xylopyranosyl-(1 → 3)]-O-β- d -glucopyranosyl-(1 → 4)-β- d -galactopyranoside (6a/6b), isola…
Mimonoside D: a new triterpenoid saponin from Mimosa diplotricha Sauvalle (Fabaceae)
2021
A new triterpenoid saponin (Mimonoside D: 3-O-��-L-arabinopyranosyl-3��-hydroxyolean-12-en-28-oic acid 28-O-��-D-xylopyranosyl-(1���2)-��-D- glucopyranoside ester (1)) was isolated from the aerial parts of Mimosa diplotricha Sauvalle together with nine known compounds: 7,4���-dihydroxyflavone (2), kaempferol (3), lupeol (4), betulinic acid (5), ��-sitosterol (6), ��-sitosterol-3-O-��-D-glucopyranoside (7), lutein (8), 5,2���-dihydroxy-7,4���,5���-trimethoxyflavone (9) and vitexin (10). Their structures were elucidated on the basis of spectroscopic (1 D and 2 D nuclear magnetic resonance) and high-resolution mass spectrometric data as well as by comparison of their spectral data with those o…
Triterpene Saponins from Four Species of the Polygalaceae Family
2005
Twelve triterpene saponins were isolated by successive MPLC over silica gel from four species of Polygalaceae: From Polygala ruwenzoriensis, five new saponins 1–5 of which 1–4 as two pairs of (E)/(Z)-isomers, together with the four known compounds tenuifoline, (E)- and (Z)-senegasaponin b, (E)- and (Z)-senegin II, and polygalasaponin XXVIII, from the genus Carpolobia, one new saponin 6 from C. alba and the known arilloside (11) from C. lutea, and another new triterpene glycoside 7 from Polygala arenaria. Their structures were established mainly by 600-MHz 2D-NMR techniques (1H,1H-COSY, TOCSY, NOESY, HSQC, HMBC) as 3-O-(β-D-glucopyranosyl)presenegenin 28-{O-α-L-arabinopyranosyl-(1 4)-O-β-D-…
Saponin with antibacterial activity from the roots of Albizia adianthifolia
2019
AbstractAn unprecedented saponin is being reported herein together with five known compounds from the methanol extract of the roots of Albizia adianthifolia. The metabolites were obtained over repe...
Saponins as immunoadjuvants and immunostimulants
1999
Saponins are either triterpene or steroid glycosides widely distributed in the plant and animal kingdom and include a large number of biologically active compounds. Most of them have surface-active and cholesterol-binding properties.
Risk assessment of beauvericin, enniatins and fusaproliferin present in follow-up infant formula by in vitro evaluation of the duodenal and colonic b…
2014
Abstract In this study, 72 samples of follow-up infant formula of Spanish origin were analyzed for the presence of the mycotoxins beauvericin (BEA), enniatins (ENs) (A, A1, B, B1), and fusaproliferin (FUS). The samples analyzed were extracted three times with ethyl acetate and then the mycotoxins were identified and quantified using a liquid chromatography (LC) coupled to a diode array detector (DAD). The positive samples analyzed in this study were digested through a simulated gastrointestinal digestion model, which permit to simulate the physiological condition of the human gastrointestinal tract (duodenal and colonic compartments) in order to assess the bioaccessibility of the bioactive …
On the Occurrence of Flavonoids in the acrocarpous Mosses
1978
Summary By means of paper chromatography two flavonoids were isolated from the methanolic extract of the moss Mnium undulatum. One substance was identified by chromatographic data, absorption spectra and acid hydrolysis as isovitexin-7-0-glucoside (saponarin). The second substance resists acid hydrolysis and is by chromatography and absorption spectrum identical with apigenin-6,8-di-C-glycoside (viccnin).