title: Two isoflavanones from the stem bark of Erythrina sacleuxii.
abstract: From the stem bark of Erythrina sacleuxii two new isoflavanones, (R)-5,7-dihydroxy-2',4',5'-trimethoxyisoflavanone (trivial name, (R)-2,3-dihydro-7-demethylrobustigenin) and (R)-5-hydroxy-2',4',5'-trimethoxy-2",2"-dimethylpyrano[5",6":6,7]isoflavanone (trivial name, (R)-saclenone) were isolated. In addition the known compounds shinpterocarpin, 2,3-dehydrokievitone, abyssinone V, abyssinone V-4'-methyl ether, erythrinasinate and 4'-O-methylsigmoidin B were isolated. The structures were determined on the basis of spectroscopic evidence.
authors.affiliation: Department of Chemistry, University of Nairobi, Kenya.
authors.forename: A
authors.initials: A
authors.lastname: Yenesew
authors.forename: J O
authors.initials: JO
authors.lastname: Midiwo
authors.forename: M
authors.initials: M
authors.lastname: Heydenreich
authors.forename: D
authors.initials: D
authors.lastname: Schanzenbach
authors.forename: M G
authors.initials: MG
authors.lastname: Peter
mesh_terms: D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry; D019685:Rosales / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: C420869:5,7-dihydroxy-2',4',5'-trimethoxyisoflavanone; C420870:5-hydroxy-2',4',5'-trimethoxy-2'',2''-dimethylpyrano(5'',6'':6,7)isoflavanone; D007529:Isoflavones