Phytochemistry p. 723 - 728 (1986)
Update date:2022-08-16
Topics:
Timmermann, Barbara N.
Hoffmann, Joseph J.
Jolad, Shivanand D.
Bates, Robert B.
Siahaan, Teruna J.
A new labdane-type ditrpenoid acid, discoidic acid, has been isolated from the aerial parts of Grindelia discoidea.Its stucture has been deduced as 4β-hydroxymethyllabd-7-en-15-oic acid on the basis of the spectral data of its methyl ester derivative and comparison of these data with those of the methyl ester derivative of its isomer, 3-β-hydroxylabd-7-en-15-oic acid, also isolated from the same extract.In addition, a dihydroflavonol and two flavonols have been isolated.Key Word Index- Grindelia discoidea; Asteraceae; diterpenoid acids; labdanes; discoidic acid; flavonoids; mass spectrometry.
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