No abstract

A steraceae, A stereae, Eupatorieae, Helenieae, Heliantheae, Exudate Flavonoids A series of A steraceae, belonging to the tribes Astereae, Eupatorieae, Helenieae and Heli antheae, have been analyzed for the presence of flavonoid aglycones accumulated on leaf and stem surfaces. Methyl ethers of apigenin, luteolin, kaempferol, and quercetin as well as methyl ethers of their relevant 6 -hydroxy derivatives were abundant, whereas 8 -O-substituted derivatives and flavanones were encountered only occasionally; 6 ,8 -di-O-substituted flavonols were found in only one species.

In stitu t für B otanik der T echnischen H ochschule, S ch n ittsp ah n straß e 3, D-W -6100 D arm sta d t, B undesrepublik D eutschland J. Jakupovic Institut für O rganische Chem ie, FB-5, T echnische U n iv ersität Berlin, Straße des 17. Juni 135,

No abstract