title: Flavonoids and terpenoids from the resinous exudates of Madia species (Asteraceae, Helenieae).
abstract: The resinous material accumulated on aerial parts of Madia species is shown to consist mainly of diterpenes, containing a series of flavonoid aglycones. A6- and/or 8-O-substitution is characteristic for many of these flavonoids. Three known rare diterpenes were found and the structure elucidation of a diterpene with a new carbon skeleton, named madiaol, is reported.
authors.affiliation: Institut für Botanik der Technischen Universität, Schnittspahnstrasse 3, D-64287 Darmstadt, Germany. Wollenweber@bio.tu-darmstadt.de
authors.forename: Eckhard
authors.initials: E
authors.lastname: Wollenweber
authors.forename: Marion
authors.initials: M
authors.lastname: Dörr
authors.forename: Marco
authors.initials: M
authors.lastname: Dörsam
authors.forename: Abu El-Hamed
authors.initials: Ael-H
authors.lastname: Hassan
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Ahmed
authors.forename: M F
authors.initials: MF
authors.lastname: Hegazy
authors.forename: Klaus-Peter
authors.initials: KP
authors.lastname: Zeller
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D008968:Molecular Conformation; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D012116:Resins, Plant / Q000737:chemistry* / Q000302:isolation & purification; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D005419:Flavonoids; D010936:Plant Extracts; D012116:Resins, Plant; D013729:Terpenes