Acta Cryst. (2003). E59, o299-o301  [ doi:10.1107/S1600536803002721 ]

16,17-Epoxy-20-oxopregn-5-ene-3,21-diyl diacetate

L. C. R. Andrade, J. A. Paixao, M. J. M. de Almeida, R. M. L. M. Martins, H. I. M. Soares, M. J. S. M. Moreno, M. L. Sá e Melo and A. S. Campos Neves

Abstract: The title compound, C₂₅H₃₄O₆, has a 3,21-configuration, with the epoxy O atom at 16,17. Rings A and C have chair conformations which are slightly flattened. Because of the presence of a double bond, ring B assumes an 8,9-half chair conformation. Ring D has a conformation close to a 14-envelope. Cohesion of the crystal can be attributed to van der Waals interactions and weak C-HO interactions.

Online 14 February 2003

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