Two novel glucodienoid alkaloids from Erythrina latissima seeds.
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.
Wanjala
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Department of Chemistry, University of Botswana, Private Bag 0022, Gaborone, Botswana.
Majinda
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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
D000470:Alkaloids; C412923:glucoerysopine; D004079:Dihydro-beta-Erythroidine; C097135:erysodine