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A new diels-alder-type adduct flavonoid from Dorstenia barteri
1Department of Chemistry, University of Dschang, Box 67, Dschang, Cameroon.
Journal of Natural Products
|November 2, 1999
Abstract:
A new Diels-Alder-type adduct, dorstenone (1), was isolated from Dorstenia barteri together with three known flavonoids, 4,2', 4'-trihydoxy-3'-prenylchalcone; 4,2',4'-trihydoxy-3, 3'-diprenylchalcone; and 5,7,4'-trihydoxy-8-prenylflavone. The structure of 1 was elucidated using a combination of highfield NMR techniques, particularly, gradient-enhanced HMQC and HMBC.