7-hydroxy-8-isopropyl-1,1,4a-trimethyl-4a,9,10,10a-tetra-hydro-phenanthren- 2(1H)-one

Abstract

The title compound, C20H26O2, was isolated from a chloro-form extract of Tetra-clinis articulata wood. The molecule contains three fused rings which exhibit different conformations. The non-aromatic oxo-substituted ring has a screw-boat conformation, while the central ring has a half-chair conformation. In the crystal, molecules are linked to each other by intermolecular O - H⋯O hydrogen bonds involving the carbonyl and hydroxy groups.