Prenylated flavonoids, monoterpenoid furanocoumarins and other constituents from the twigs of Dorstenia elliptica (Moraceae).
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.
Abegaz
Berhanu M
BM
Department of Chemistry, University of Botswana, Private Bag UB00704, Gaborone, Botswana. abegazb@mopipi.ub.bw
Ngadjui
Bonaventure T
BT
Folefoc
Gabriel N
GN
Fotso
Serge
S
Ambassa
Pantaleon
P
Bezabih
Merhatibeb
M
Dongo
Etienne
E
Rise
Frode
F
Petersen
Dirk
D
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*
D005419:Flavonoids; D011564:Furocoumarins; D039821:Monoterpenes