Dinklagins A, B and C: three prenylated flavonoids and other constituents from the twigs of Dorstenia dinklagei.
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.
Ngadjui
Bonaventure T
BT
Department of Organic Chemistry, University of Yaounde 1, BP 812, Yaounde, Cameroon. bngadjui@uycdc.uninet.cm
Dongo
Etienne
E
Abegaz
Berhanu M
BM
Fotso
Serge
S
Tamboue
Helene
H
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*
D044950:Flavanones; D005419:Flavonoids; C468824:dinklagin A; C468825:dinklagin B; C468826:dinklagin C