title: A new flavonoid from Cudrania cochinchinensis.
abstract: Chemical investigation of the ethanol extract of the roots of Cudrania cochinchinensis led to the isolation of a new flavonoid, (6S,12S,13R)-1-methoxy cyanomaclurin (1), together with seven known compounds, 1,3,5-trihydroxy-4-(3'-hydroxy-3'-methylbutyl)xanthone (2), 1,3,6-trihydroxy-4-prenylxanthone (3), 1,3,6,7-tetrahydroxyxanthone (4), 1,3,5,6-tetrahydroxyxanthone (5), 1,3,6-trihydroxy-5-methoxyxanthone (6), resveratrol (7) and oxyresveratrol (8). The structure of compound 1 was elucidated on the basis of 1D and 2D NMR spectra and the HR-ESI-MS data. The absolute stereochemistry was deduced via Rh2(OCOCF3)4-induced CD and NOESY spectra.
authors.affiliation: a Beijing Institute of Radiation Medicine , Beijing 100850 , P.R. China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhou
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Shi-Jun
authors.initials: SJ
authors.lastname: Liu
authors.forename: Jun-Xing
authors.initials: JX
authors.lastname: Dong
mesh_terms: D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D029586:Moraceae / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*
chemical_list: C000601150:1-methoxy cyanomaclurin; D005419:Flavonoids
keywords: (6S; 12S; 13R)-1- methoxycyanomaclurin; Cudrania cochinchinensis; flavonoid