The molecule is a sesquiterpene lactone that is decahydroazuleno[6,5-b]furan-2(3H)-one substituted by acetyloxy groups at positions 5 and 7, a hydroxy group at position 4, methyl groups at positions 4a and 8 and a methylidene group at position 3. It has been isolated from the aerial parts of Inula hupehensis. It has a role as a metabolite, an anti-inflammatory agent and a plant metabolite. It is a gamma-lactone, an organic heterotricyclic compound, a sesquiterpene lactone, an acetate ester and a secondary alcohol.
[(3aS,5R,5aS,6S,8S,8aR,9S,9aS)-8-acetyloxy-9-hydroxy-5,8a-dimethyl-1-methylidene-2-oxo-4,5,5a,6,7,8,9,9a-octahydro-3aH-azuleno[6,5-b]furan-6-yl] acetate