No abstract

The crystal structure of the title compound, C31H45BrO5, has been determined at 0.80 Å resolution. This study demonstrates that the Marker transformation applied to a diosgenin derivative does not affect the A–D ring structure of the steroid. The configurations of the stereogenic centres C20 and C25 also remain unchanged during the reaction.

Key indicatorsSingle-crystal X-ray study T = 298 K Mean '(C±C) = 0.005 A Ê R factor = 0.042 wR factor = 0.114 Data-to-parameter ratio = 7.8For details of how these key indicators were automatically derived from the article, see