Acta Cryst. (2005). E61, o980-o982  [ doi:10.1107/S1600536805007415 ]

21-Acetoxy-17-4-pregnene-3,20-dione

R. Dey, S. Chanda, A. Pal and S. Roychowdhury

Abstract: The synthetic steroid 21-acetoxy-17-4-pregnene-3,20-dione, C₂₃H₃₂O₄, crystallizes with a single molecule in the asymmetric unit. The molecule contains four fused rings, typical of steroids. The cyclohexene ring A has nearly the conformation of a boat. One saturated six-membered ring, B, is intermediate between chair and half-chair conformations, while the other six-membered ring, C, is essentially a chair. The five-membered ring D tends towards a twist conformation. The ring junction A/B is quasi-trans, whereas the ring junctions B/C and C/D are both trans. The molecule is slightly convex towards the side.

Online 18 March 2005

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