title: Bacoside A3--a triterpenoid saponin from Bacopa monniera.
abstract: 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.
authors.affiliation: Medicinal Chemistry Division, Central Drug Research Institute, Lucknow, India.
authors.forename: S
authors.initials: S
authors.lastname: Rastogi
authors.forename: R
authors.initials: R
authors.lastname: Pal
authors.lastname: KulshreshthaDK
mesh_terms: D002240:Carbohydrate Sequence; D007194:India; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D014315:Triterpenes; C087625:bacoside A3