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Title: 16α,17α-Ep-oxy-5α-hydr-oxy-6β-nitrooxy-20-oxopregnan-3β-yl acetate
Authors: Pinto, R. M. A. 
Beja, A. Matos 
Salvador, J. A. R. 
Paixão, J. A. 
Keywords: single-crystal X-ray study; T = 223 K; mean (C–C) = 0.003 A°; R factor = 0.043; wR factor = 0.118; data-to-parameter ratio = 9.8
Issue Date: 14-May-2009
Publisher: International Union of Crystallography
Project: SFRH/ BD/18013/2004 
Serial title, monograph or event: Acta Crystallographica Section E: Structure Reports Online
Volume: 65
Issue: Pt 6
Abstract: The title steroid, C(23)H(33)NO(8), is a pregnane derivative obtained regio-, stereo- and chemoselectively from the ring opening of the corresponding 5α,6α;16α,17α-diepoxide with bis-muth(III) nitrate. There are two symmetry-independent mol-ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. All rings are trans-fused. The conformations of the six-membered rings are close to chair forms, while the five-membered ring adopts an envelope conformation. The mol-ecules are held together by an extensive O-H⋯O hydrogen-bonding network of chains runnning along the a axis.
ISSN: 1600-5368
DOI: 10.1107/S1600536809016997
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais
FFUC- Artigos em Revistas Internacionais

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