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