title: Two biflavonoids from Ouratea flava stem bark.
abstract: In a chemical investigation on the stem bark of Ouratea flava, two biflavonoids: 1-[3-(2,4-dihydroxy-benzoyl)-4,5,6-trihydroxy-2-(4-hydroxy-phenyl)-benzofuran-7-yl] -3-(4-hydroxy-phenyl) -propenone (flavumone A) and 3-(2,4-dihydroxy-benzoyl)-4-hydroxy-2,7-bis-(4-hydroxy-phenyl) -7,8- dihydro-furo[2,3-f]chromen-9-on (flavumone B) were isolated along with five known flavonoids. Their structures were established by various analyses including 2D-NMR spectroscopy.
authors.affiliation: Centre de Recherches en Plantes Médicinales et Médecine Traditionnelle, I.M.P.M., B.P. 6163, Yaoundé, Cameroon.
authors.forename: Joséphine Ngo
authors.initials: JN
authors.lastname: Mbing
authors.forename: Dieudonné Emmanuel
authors.initials: DE
authors.lastname: Pegnyemb
authors.forename: Raphael Ghogomu
authors.initials: RG
authors.lastname: Tih
authors.forename: Beibam Lucas
authors.initials: BL
authors.lastname: Sondengam
authors.forename: Alain
authors.initials: A
authors.lastname: Blond
authors.forename: Bernard
authors.initials: B
authors.lastname: Bodo
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D019685:Rosales / Q000737:chemistry*
chemical_list: D005419:Flavonoids