3β,12β,14α-Trihydroxy-pregnan-20-one.

The title compound, C(21)H(34)O(4), is a steriod of the pregnane family prepared by the sequential oxidation and reduction of 3β,12β-diacet-oxy-20-ethyl-enedioxy-pregnan-14-ene. The con-formations of the six-membered rings are close to chair forms, while the five-membered ring adopts an envelope conformation. All the rings are trans-fused and an intra-molecular O-H⋯O hydrogen bond occurs. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network.