Crystal structure of 15,16-ep-oxy-7β,9α-di-hydroxy-labdane-13(16),14-dien-6-one.

In the title mol-ecule, C20H30O4, both cyclo-hexane rings adopt chair conformations. In the crystal, mol-ecules are connected by O-H⋯O hydrogen bonds forming chains along [100]. In addtion, an intra-molecular O-H⋯O hydrogen bond forms an S(5) ring.