The coumarins of Geijera parviflora Lindl

Abstract

Two new coumarins have been isolated from the leaves of Geijera parviflora Lindl. One of these, dehydrogeijerin, has been shown to be 6-(β,β-dimethylacrylyl)-7-methoxycoumarin (I) and the other, geiparvarin, to be 7-(4,7-epoxy-3,7-dimethyl-6-oxoocta-2,4- dienyloxy)coumarin (IX).