17α-Ethynyl-3-methoxy­estra-1,3,5(10),9(11)-tetraen-17-ol

Abstract

In the title compound, C21H24O2, rings B, C and D adopt half-chair, distorted half-chair and envelope conformations, respectively. In the crystal structure, there is an inter­molecular O—H⋯O hydrogen bond. The mol­ecules are arranged in a head-to-tail fashion, with the meth­oxy and hydr­oxy groups forming a two-dimensional hydrogen-bond network