Dinklagins A, B and C: three prenylated flavonoids and other constituents from the twigs of Dorstenia dinklagei
2002; Elsevier BV; Volume: 61; Issue: 1 Linguagem: Inglês
10.1016/s0031-9422(02)00130-9
ISSN1873-3700
AutoresBonaventure T. Ngadjui, Étienne Dongo, Berhanu M. Abegaz, Serge Fotso, Hélène Tamboue,
Tópico(s)Bioactive natural compounds
ResumoThree 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″ξ-trihydroxy-6″,6″-dimethylchromano-(7,6,2″,3″)-flavone and (+)6-(2ξ-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.
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