title: Cholestane- and pregnane-type glycosides from the roots of Tribulus cistoides.
abstract: From the methanolic extract of the roots of Tribulus cistoides the cardioactive saponin-3, which is known to occur in the leaves, was isolated along with tribulosin, a pregnane-type glycoside and eight new cholestane glycosides. D-(+)-Pinitol and sucrose were major constituents. The structures were established by spectroscopic studies of the isolated compounds, their acetylated derivatives and their hydrolysation products. Chemical conversions revealed the configurations at C-22 and C-25, respectively.
authors.affiliation: Department of Pharmaceutical Chemistry, University of Erlangen, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Achenbach
authors.forename: H
authors.initials: H
authors.lastname: Hübner
authors.forename: M
authors.initials: M
authors.lastname: Reiter
mesh_terms: D002240:Carbohydrate Sequence; D002776:Cholestanes / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D018517:Plant Roots / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011278:Pregnanes / Q000737:chemistry*
chemical_list: D002776:Cholestanes; D006027:Glycosides; D011278:Pregnanes