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Flavonoids and Terpenoids from the Resinous Exudates of Madia Species (Asteraceae, Helenieae)

2003; De Gruyter; Volume: 58; Issue: 3-4 Linguagem: Inglês

10.1515/znc-2003-3-401

1865-7125

Eckhard Wollenweber, Marion Dörr, Marco Dörsam, Abu El-Hamed Hassan, Ahmed A. Ahmed, Mohamed‐Elamir F. Hegazy, Klaus‐Peter Zeller,

Plant Toxicity and Pharmacological Properties

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.