Acta Cryst. (2009). E65, o2379-o2380  [ doi:10.1107/S1600536809034990 ]

6-Hydroxysalvinolone

A. W. Salae, S. Chantrapromma, H.-K. Fun and C. Karalai

Abstract: The title compound {systematic name: 5,6,10-trihydroxy-7-isopropyl-1,1,4a-trimethyl-2,3,4,4a-tetrahydrophenanthren-9(1H)-one}, C₂₀H₂₆O₄, is a diterpenoid which was isolated from the roots of Premna obtusifolia. The molecule has three fused six-membered rings; the cyclohexane ring is in a twisted-boat conformation and the cyclohexene ring adopts a sofa form. Intramolecular O-HO hydrogen bonds generate two S(5) ring motifs. In the crystal, molecules are linked into infinite one-dimensional chains along the [001] direction by O-HO hydrogen bonds and weak C-HO interactions.

Online 9 September 2009

Copyright © International Union of Crystallography
IUCr Webmaster