title: Two new diphenylmethyl-substituted xanthones from Seicuridaca longepedunculata.
abstract: Two new diphenylmethyl-substituted xanthones, named muchimangins K (1) and L (2), have been isolated from the roots of Securidaca longepedunculata (Polygalaceae) collected in the Democratic Republic of Congo. Their structures were established by analyses of the spectral data, including 2D NMR spectra, to be 1 ,3,6,8-tetrahydroxy-2.5-dimethoxy-4-[ -(2,4,5-trimethoxyphenyl)-1-phenylmethyl]xanthone (1) and 1,3,6-trihydroxy-4,7-dimethoxy-2-[1-(2,4,5-trimethoxyphenyl)- 1-phenylmethyl]xanthone (2).
authors.forename: Dya Fita
authors.initials: DF
authors.lastname: Dibwe
authors.forename: Suresh
authors.initials: S
authors.lastname: Awale
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Kadota
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Morita
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tezuka
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry; D029608:Polygalaceae / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D044004:Xanthones; C000591728:muchimangin K; C000591729:muchimangin L