title: Three new isoflavonoids from Erythrina caffra.
abstract: Three new isoflavonoids, 5,7-dihydroxy-2',4'-dimethoxy-5'-(3-methylbut-2-enyl) isoflavanone (erycaffra A) (1), 5,7-dihydroxy-2',4'-dimethoxy-5'-(2-hydroxy-3-methylbut-3-enyl)isoflavanone (erycaffra B) (2), and 5,7-dihydroxy-6,8-di-(2-hydroxy-3-methylbut-3-enyl)isoflavone (erycaffra C) (3), were isolated from the stem bark of E. caffra Thunb., along with eight known compounds, namely, alpinumisoflavone (4), isoerysenegalensein E (5), beta-amyrin (6), oleanolic acid (7), octacosyl-E-ferulate (8), triacontyl-4-hydroxycinnamate (9), n-tetracosyl p-coumarate (10) and octacosan-1-ol (11). The structures were determined on the basis of spectroscopic (1D, 2D-NMR) and MS data and by comparison with literature values.
authors.forename: Zelalem Yibralign
authors.initials: ZY
authors.lastname: Desta
authors.forename: Runner R T
authors.initials: RR
authors.lastname: Majinda
mesh_terms: D007887:Fabaceae / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry
chemical_list: D007529:Isoflavones