Structural characterization of a complex triterpenoid saponin from Albizia lebbeck and investigation of its permeability property and supramolecular interactions with membrane constituents
作者:Elaine O.R. Viana、Maria de Fátima S.J. Cruz、Marília J. da Silva、Gabriela M. Pereira、Bernadete P. da Silva、Luzineide W. Tinoco、José P. Parente
DOI:10.1016/j.carres.2018.11.015
日期:2019.1
21-[[(2E,6S)-6-[6-deoxy-4-O-[(2E,6S)-6-hydroxy-2-(hydroxymethyl)-6-methyl-1-oxo-2,7-octadienyl]-[(β-d-glucopyranosyl)oxy]-2-(hydroxymethyl)-6-methyl-1-oxo-2,7-octadienyl]-[(β-d-glucopyranosyl)oxy]-2,6-dimethyl-1-oxo-2,7-octadienyl]oxy]-16-hydroxy-3-[[O-β-d-xylopyranosyl-(1 → 2)-O-α-l-arabinopyranosyl-(1 → 6)-2-(acetylamino)-2-deoxy-β-d-glucopyranosyl]oxy]-(3β,16α,21β)-olean-12-en-28-oic acid O-α-l-ar
作为从药用植物中发现潜在的具有生物活性的天然产物的不断努力的一部分,进行了本研究,以从Albizia lebbeck的树皮中分离出新的复杂的三萜皂苷。使用色谱方法进行分离,并通过详细的1H和13C NMR光谱分析(包括2D-NMR(COSY,TOCSY,HSQC和HMBC)光谱技术,高分辨率电喷雾电离质谱(HRESIMS)分析和化学转化。其结构被确定为21-[[[(2E,6S)-6- [6-deoxy-4-O-[(2E,6S)-6-hydroxy-2-(hydroxymethyl)-6-methyl-1-oxo] -2,7-辛二烯基]-[(β-d-吡喃葡萄糖基)氧基] -2-(羟甲基)-6-甲基-1-氧代-2,7-辛二烯基]-[(β-d-吡喃葡萄糖基)氧基] -2,6-二甲基-1-氧-2- 7-辛二烯基]氧基] -16-羟基-3-[[O-β-d-吡喃吡喃糖基-(1→2)-O-α-1-1-阿