title: Two new 5-deoxyflavones from Albizia odoratissima.
abstract: Two new 5-deoxyflavones, 7,8-dimethoxy-3',4'-methylenedioxyflavone (1) and 7,2',4'-trimethoxyflavone (2) together with a known flavone, 7,4'-dimethoxy-3'-hydroxyflavone (3) were isolated from the rootbark of Albizia odoratissima. The structures of these new compounds were elucidated by electrospray ionization mass spectrometry (ESI-MS) and 1D and 2D-NMR spectral studies including (1)H-(1)H correlation spectroscopy (COSY), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and nuclear Overhauser enhancement spectroscopy (NOESY).
authors.affiliation: Natural Products Division, Department of Chemistry, Sri Venkateswara University, India.
authors.forename: Yerra
authors.initials: Y
authors.lastname: Koteswara Rao
authors.forename: Mopur
authors.initials: M
authors.lastname: Vijaya Bhaskar Reddy
authors.forename: Chunduri
authors.initials: C
authors.lastname: Venkata Rao
authors.forename: Duvvuru
authors.initials: D
authors.lastname: Gunasekar
authors.forename: Alan
authors.initials: A
authors.lastname: Blond
authors.forename: Cristelle
authors.initials: C
authors.lastname: Caux
authors.forename: Bernard
authors.initials: B
authors.lastname: Bodo
mesh_terms: D031289:Albizzia / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D019441:Plant Epidermis / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D012997:Solvents; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004224:Diterpenes; D012997:Solvents; C471333:jiufengdine; C471334:jiufengtine