(E)-9-isopropyl-6-methyldeca-5,9-dien-2-one, a terpenoid C14-ketone with a novel skeleton

Abstract
The isolation and synthesis of (E)-9-isopropyl-6-methyldeca-5,9-dien-2-one, a terpenoid C14-ketone with a novel skeleton from costus root oil (Saussurea lappa Clarke) are reported.