Two new O-geranyl coumarins from the resinous exudate of Haplopappus multifolius

Abstract

From the resinous exudate of leaves of Haplopappus multifolius two new coumarins were isolated and assigned the structures 6-hydroxy-7-(5′- hydroxy-3′,7′-dimethylocta-2′,6′-dien)-oxycoumarin (1) and 6-hydroxy-7-(7′-hydroxy-3′,7′-dimethylocta-2′, 5′-dien)-oxy coumarin (2).