title: Dinklagins A, B and C: three prenylated flavonoids and other constituents from the twigs of Dorstenia dinklagei.
abstract: Three prenylated flavonoids, dinklagins A, B and C identified, respectively, as (-)-6-(3,3-dimethylallyl)-7-hydroxy-6''', 6'''-dimethylchromeno-(4',3',2''',3''')-flavanone, (+)-5,4',5"xi-trihydroxy-6'',6''-dimethylchromano-(7,6,2'',3'')-flavone and (+)6-(2xi-hydroxy-3-methyl-3-butenyl)-5,7,4'-trihydroxyflavone were isolated from the twigs of Dorstenia dinklagei together with the known 6-prenylapigenin, 4-hydroxylonchocarpin, stipulin and 5,4'-dihydroxy-6'',6''-dimethylchromano-(7,6,2'',3'')-flavone. Their structures were determined on the basis of spectral data and by comparison with data reported in the literature and with authentic specimens for known compounds.
authors.affiliation: Department of Organic Chemistry, University of Yaounde 1, BP 812, Yaounde, Cameroon. bngadjui@uycdc.uninet.cm
authors.forename: Bonaventure T
authors.initials: BT
authors.lastname: Ngadjui
authors.forename: Etienne
authors.initials: E
authors.lastname: Dongo
authors.forename: Berhanu M
authors.initials: BM
authors.lastname: Abegaz
authors.forename: Serge
authors.initials: S
authors.lastname: Fotso
authors.forename: Helene
authors.initials: H
authors.lastname: Tamboue
mesh_terms: D002845:Chromatography; D044950:Flavanones; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D029586:Moraceae / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*
chemical_list: D044950:Flavanones; D005419:Flavonoids; C468824:dinklagin A; C468825:dinklagin B; C468826:dinklagin C