Rastogi S, Pal R
Medicinal Chemistry Division, Central Drug Research Institute, Lucknow, India.
Phytochemistry. 1994 May;36(1):133-7. doi: 10.1016/s0031-9422(00)97026-2.
A new triterpenoid saponin, bacoside A3, a constituent of bacosides the saponin mixture of Bacopa monniera, was isolated and characterized. Its structure was established as 3-beta-[O-beta-D-glucopyranosyl(1-->3)-O- [alpha-L-arabinofuranosyl(1-->2) ]O-beta-D-glucopyranosyl)oxy]jujubogenin by chemical and spectral analyses. The cis-isomer of ebelin lactone was also obtained as one of the artefacts of the aglycone and its structure revised.
一种新的三萜皂苷——Bacoside A3，从印度假马齿苋的皂苷混合物Bacosides中分离并鉴定出来。通过化学和光谱分析确定其结构为3-β-[O-β-D-吡喃葡萄糖基(1→3)-O-[α-L-阿拉伯呋喃糖基(1→2)]O-β-D-吡喃葡萄糖基)氧基]酸枣仁皂苷元。埃贝林内酯的顺式异构体也作为苷元的一种人工产物得到，其结构得到修正。
