The chemistry of Eremophila spp. XV. New acyclic diterpenes from Eremophila spp

Abstract

Eight new acyclic diterpenes have been isolated from the resin of E. exilifolia F. Muell., E. glutinosa Chinnock and E. glutinosa var. Evidence for their structure is presented. In contrast to most other acyclic diterpenes those from Eremophila species contain two internal double bonds in the cis-configuration with respect to the carbon chain. The biosynthetic significance of these compounds is discussed.