<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rezgui, A.</style></author><author><style face="normal" font="default" size="100%">Mitaine-Offer, A.-C.</style></author><author><style face="normal" font="default" size="100%">Miyamoto, T.</style></author><author><style face="normal" font="default" size="100%">Tanaka, C.</style></author><author><style face="normal" font="default" size="100%">Paululat, T.</style></author><author><style face="normal" font="default" size="100%">Lacaille-Dubois, M.-A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">New steroidal glycosides from Dracaena marginata, Dracaena fragrans and Allium flavum</style></title><secondary-title><style face="normal" font="default" size="100%">Planta MedicaPlanta Medica</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">16</style></number><volume><style face="normal" font="default" size="100%">80</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Steroidal saponins are a class of glycosides occurring in many plant species. The aglycon part of these glycosides is constituted by a furostane or spirostane-type skeleton, rarely cholestane. These saponins are known for their interesting pharmacological activities such as antifungal, anti-ischemia, antispasmodic, cytotoxic, haemolytic [1 – 3], and anti-inflammatory properties [4]. The aim of our researches was the isolation and structural elucidation of the steroidal saponins from the biodiversity. In this context, the study of three plants species,&amp;nbsp;Dracaena marginata,&amp;nbsp;D. fragrans&amp;nbsp;(Asparagaceae) and&amp;nbsp;Allium flavum&amp;nbsp;(Amaryllidaceae) led to isolation of twenty-one natural glycosides by column chromatography on Sephadex LH-20, medium pressure liquid chromatography and vacuum liquid chromatography on silica gel and reversed-phase RP-18 silica gel. The structures were elucidated by a detailed spectral analysis by 600 MHz 2D-NMR (COSY, TOCSY, ROESY/NOESY, HSQC, HMBC/HMQC), and mass spectrometry. Six new compounds were characterized as spirostane and furostane- type glycosides from&amp;nbsp;D. marginata&amp;nbsp;(1 – 3) and from&amp;nbsp;A. flavum&amp;nbsp;(4 – 6). The presence of a 4-O-sulfated arabinopyranosyl moiety in the oligosaccharide chain at C-1 of the steroid skeleton underlined the originality of the compounds of the two&amp;nbsp;Dracaena&amp;nbsp;species, and might represent a chemotaxonomic marker of the genus&amp;nbsp;Dracena. The isolation and structure elucidation of the six new compounds will be presented.</style></abstract></record></records></xml>