title: Flavones from Andrographis viscosula.
abstract: Two new 2'-oxygenated flavones, 5,7,2'-trimethoxyflavone (1). and 5,7,2',4',6'-pentamethoxyflavone (2). were isolated from the whole plant of Andrographis viscosula along with three known flavones, echioidinin (3). 5,2',6'-trihydroxy-7-methoxyflavone (4). and echioidin (5). The structures of these compounds were elucidated on the basis of 1D and 2D NMR spectral studies.
authors.affiliation: Department of Chemistry, Sri Venkateswara University, 517 502, Tirupati, India.
authors.forename: Y Koteswara
authors.initials: YK
authors.lastname: Rao
authors.forename: P
authors.initials: P
authors.lastname: Harikishore
authors.forename: C Venkata
authors.initials: CV
authors.lastname: Rao
authors.forename: D
authors.initials: D
authors.lastname: Gunasekar
authors.forename: A
authors.initials: A
authors.lastname: Blond
authors.forename: B
authors.initials: B
authors.lastname: Bodo
mesh_terms: D035685:Andrographis / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure
chemical_list: D005419:Flavonoids