title: Three isoflav-3-enes and a 2-arylbenzofuran from the root bark of Erythrina burttii.
abstract: From the root bark of Erythrina burttii three isoflav-3-enes, 7,4'-dihydroxy-2'-methoxy-6-(1",1"-dimethylallyl)isoflav-3-ene (trivial name, burttinol-A), 4'-hydroxy-2'-methoxy-2",2"-dimethylpyrano[5",6":8,7]isoflav-3-ene (trivial name, burttinol-B), 7,4'-dihydroxy-2'-methoxy-8-(3",3"-dimethylallyl)isoflav-3-ene (trivial name, burttinol-C), and 2-arylbenzofuran, 6,4'-dihydroxy-2'-methoxy-5-(1",1"-dimethylallyl)-2-arylbenzofuran (trivial name, burttinol-D) were isolated. In addition, the known compounds, abyssinone V-4'-methyl ether, bidwillol A, calopocarpin, erybraedin A, erythrabyssin II, isobavachalcone, phaseollidin and phaseollin were identified. The structures were determined on the basis of spectroscopic evidence.
authors.affiliation: Department of Chemistry, University of Nairobi, PO Box 30197, Nairobi, Kenya.
authors.forename: Abiy
authors.initials: A
authors.lastname: Yenesew
authors.forename: Jacob O
authors.initials: JO
authors.lastname: Midiwo
authors.forename: Salome M
authors.initials: SM
authors.lastname: Guchu
authors.forename: Matthias
authors.initials: M
authors.lastname: Heydenreich
authors.forename: Martin G
authors.initials: MG
authors.lastname: Peter
mesh_terms: D001572:Benzofurans / Q000737:chemistry / Q000302:isolation & purification*; D004895:Erythrina / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018517:Plant Roots / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001572:Benzofurans; D007529:Isoflavones