title: 3β-Acet-oxy-19-hy-droxy-Δ(5)-pregnen-20-one.
abstract: In the title compound, C(23)H(34)O(4), the C/D and D/E rings are trans fused and the A/B ring possesses an anti fusion. The two cyclo-hexane rings adopt a chair conformation while the cyclo-hexene ring exhibits a half-chair conformation. The cyclo-pentane ring displays an envelope conformation with the C atom bearing the methyl group as the flap. In the crystal, the mol-ecules are linked by O-H⋯O hydrogen bonds, forming chains along the b axis.
authors: Department für Chemie der Universität zu Köln, Greinstrasse 4, 50939 Köln,  Germany.
authors: Aike
authors: A
authors: Meier Zu Greffen
authors: Darius P
authors: DP
authors: Kranz
authors: Jörg-M
authors: JM
authors: Neudörfl
authors: Hans-Günther
authors: HG
authors: Schmalz