Abstract
The crystal structure of the titled compound (IVb) has been determined by threedimensional X-ray analysis from the diffractometer data. Crystals are monoclinic, a=14.494 (10), b=6.586 (3), c=12.420 (8) Å, β=111.89 (2)°, U=1100.1 Å3, Z=2, space group P21. Conformation of ring C has proved to be somewhat distorted boat from. The relative ease with which 16, 17-diketo-C/D-cis steroids do enolize has been interpreted in terms of conformational change.
