title: Flavonoids from the stem bark of Bolusanthus speciosus.
abstract: Three flavonoids (bolusanthols A-C), viz an isoflavan and two prenylated isoflavanones, were isolated from the stem bark of Bolusanthus speciosus in addition to four known flavonoids, 5,7,3'-trihydroxy-4'-methoxy-5'-methoxy-gamma,gamma-dimethylallylisoflavanone, 5,7,2'-trihydroxy-4'-methoxy-6,5'-di(gamma,gamma)-dimethylallyl)isoflavanone, 3,5,7,3',4'-pentahydroxy-6-gamma,gamma-dimethylallylflavone and 5,7,2',4'-tetrahydroxy-8,3'-di(gamma,gamma-dimethylallyl)-isoflavanone. The structure of the new compounds were determined to be 4,2',3',4'-tetrahydroxy-6,7-methylenedioxyisoflavan (bolusanthol A), 5,7,3',4'-tetrahydroxy-5'-gamma,gamma-dimethylallylisoflavanone (bolusanthol B), and 5,7,4'-trihydroxy-6,3'-di(gamma,gamma-dimethylallyl)isoflavanone (bolusanthol C) by spectroscopic methods.
authors.affiliation: Department of Chemistry, University of Botswana, Gaborone.
authors.forename: G
authors.initials: G
authors.lastname: Bojase
authors.forename: C C
authors.initials: CC
authors.lastname: Wanjala
authors.forename: R R
authors.initials: RR
authors.lastname: Majinda
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D007529:Isoflavones; D018547:Plant Stems / Q000737:chemistry; D019685:Rosales / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D007529:Isoflavones; C433021:bolusanthol A; C433022:bolusanthol B; C433023:bolusanthol C