The molecule is a sesquiterpene lactone that is hexahydro-1-benzofuran-2(3H)-one substituted by a methyl group at position 6, methylene group at position 3, isopropenyl group at position 5 and a vinyl group at position 6. Isolated from Inula helenium and Rudbeckia laciniata, it exhibits antiproliferative activity. It has a role as a metabolite and an antineoplastic agent.
(3aR,5R,6R,7aR)-6-ethenyl-6-methyl-3-methylidene-5-prop-1-en-2-yl-4,5,7,7a-tetrahydro-3aH-1-benzofuran-2-one