rac-(2aS,2a(1) R,3aR,3a(1) S,5aS,6aR)-2a-Allyl-2,4-di-chloro-2a,2a(1),3a(1),5a,6,6a-hexa-hydro-3aH-3-oxadi-cyclo-penta-[cd,gh]penta-len-3a-ol.

The title racemic triquinane, C(14)H(14)Cl(2)O(2), is composed of four five-membered rings, one of which is a tetra-hydro-furan ring to which an allyl group on one side and a hydroxyl group on the other side are attached. The core of the triquinane unit has a cis-syn-cis configuration. In the crystal, the mol-ecules are linked by pairwise O-H⋯O hydrogen bonds, generating inversion dimers featuring R (2) (2)(8) loops.