title: Two novel glucodienoid alkaloids from Erythrina latissima seeds.
abstract: The structures of two novel glycodienoid alkaloids isolated from Erythrina latissima seeds have been established as (+)-16beta-D-glucoerysopine (1) and (+)-15beta-D-glucoerysopine (2). NOE measurements established that 1 and 2 are positional isomers. Their structures were elucidated from their 1D and 2D homonuclear and heteronuclear NMR spectroscopic data. In addition, seven known tetracyclic dienoid alkaloids were isolated and identified as (+)-erysovine, (+)-erysodine, (+)-erysotrine, (+)-erythraline, (+)-beta-D-glucoerysodine, (+)-8-oxoerythraline, and (+)-erysotramidine.
authors.affiliation: Department of Chemistry, University of Botswana, Private Bag 0022, Gaborone, Botswana.
authors.forename: C C
authors.initials: CC
authors.lastname: Wanjala
authors.forename: R R
authors.initials: RR
authors.lastname: Majinda
mesh_terms: D000470:Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D004079:Dihydro-beta-Erythroidine / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D004895:Erythrina / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal; D012639:Seeds / Q000737:chemistry
chemical_list: D000470:Alkaloids; C412923:glucoerysopine; D004079:Dihydro-beta-Erythroidine; C097135:erysodine