(3S,12R,20S,24R)-20,24-Epoxydammarane-3,12,25-triol

Abstract

In the title molecule, C30H52O4, the three six-membered rings are in chair conformations, the cyclopentane ring is in an envelope form and the tetrahydrofuran ring has a conformation intermediate between half-chair and sofa. In the crystal, molecules are linked by intermolecular O—H...O hydrogen bonds into helical chains along [100]. Two intramolecular O—H...O hydrogen bonds are also present. One C atom of the tetrahydrofuran ring and its attached H atoms are equally disordered over two sets of sites.