A new diels-alder-type adduct flavonoid from Dorstenia barteri.
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.
Tsopmo
A
A
Department of Chemistry, University of Dschang, Box 67, Dschang, Cameroon.
Tene
M
M
Kamnaing
P
P
Ayafor
J F
JF
Sterner
O
O
D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D013057:Spectrum Analysis
D005419:Flavonoids; C400586:dorstenone