Pc. Rossomando et al., DITERPENES AND OTHER CONSTITUENTS FROM ARGENTINEAN HAPLOPAPPUS SPECIES, Anales de la Asociacion Quimica Argentina, 83(1-2), 1995, pp. 55-58
The aerial parts of Haplopappus arbutoides afforded labda-8(17).13E-di
en-15.18-dioic acid-15-methylester. The relative position of the free
acid was unambigously established. In addition flavonoids and an aceto
phenone derivative were isolated. Haplopappus scrobiculatus gave 2-Oxo
kolavenic acid and flavonoids.