(Z)‐12‐Hydroxy‐14,15‐dinorlabda‐8(17),11‐dien‐13‐one, C18H28O2

The stereochemistry of the diosphenol moiety of the title compound [alternative systematic name: 4-(decahydro-5,5,8a-trimethyl-2-methylene-1-naphthyl)-3-hydroxy-3-buten-2-one] was confirmed to have the Z configuration. The diosphenol moiety is approximately planar with an intramolecular hydrogen bond existing between the alcohol and the keto group