title: Prenylated flavonoids, monoterpenoid furanocoumarins and other constituents from the twigs of Dorstenia elliptica (Moraceae).
abstract: A monoprenylated flavan and two monoterpenoid substituted furanocoumarins were isolated from the twigs of Dorstenia elliptica along with 3-(3,3-dimethylallyl)-4,2',4'-trihydroxylchalcone, psoralen, bergapten, O-[3-(2,2-dimethyl-3-oxo-2H-furan-5-yl)butyl]bergaptol, beta-sitosterol and its beta-D-glucopyranoside. The structure of the flavan was determined as 6(1,1-dimethylallyl)-7,4'-dihydroxylflavan and the monoterpenoid substituted furanocoumarins were assigned as O-[3-(2,2-dimethyl-3-oxo-2H-furan-5-yl)-3-hydroxybutyl]-bergaptol and O-[2-(5-hydroxy-2,6,6-trimethyl-3-oxo-2H-pyran-2-yl)ethyl]bergaptol, respectively, using spectroscopic analysis, especially, 2D NMR spectra.
authors.affiliation: Department of Chemistry, University of Botswana, Private Bag UB00704, Gaborone, Botswana. abegazb@mopipi.ub.bw
authors.forename: Berhanu M
authors.initials: BM
authors.lastname: Abegaz
authors.forename: Bonaventure T
authors.initials: BT
authors.lastname: Ngadjui
authors.forename: Gabriel N
authors.initials: GN
authors.lastname: Folefoc
authors.forename: Serge
authors.initials: S
authors.lastname: Fotso
authors.forename: Pantaleon
authors.initials: P
authors.lastname: Ambassa
authors.forename: Merhatibeb
authors.initials: M
authors.lastname: Bezabih
authors.forename: Etienne
authors.initials: E
authors.lastname: Dongo
authors.forename: Frode
authors.initials: F
authors.lastname: Rise
authors.forename: Dirk
authors.initials: D
authors.lastname: Petersen
mesh_terms: D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D011564:Furocoumarins / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D039821:Monoterpenes / Q000737:chemistry*; D029586:Moraceae / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018547:Plant Stems / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D011564:Furocoumarins; D039821:Monoterpenes