The molecule is a diterpene derived from labdane by dehydrogenation across the C(8)-C(17), C(12)-C(13) and C(14)-C(15) bonds. It derives from a hydride of a labdane.
(4aS,8S,8aS)-4,4,8a-trimethyl-7-methylidene-8-[(2E)-3-methylpenta-2,4-dienyl]-2,3,4a,5,6,8-hexahydro-1H-naphthalene