21-Deoxycortisone (17 alpha-hydroxy4-pregnene-3,11,20-trione)Dey, R., Langer, V., Roychowdhury, P., Roychowdhuryd, S. and Drew, M.G.B. (2005) 21-Deoxycortisone (17 alpha-hydroxy4-pregnene-3,11,20-trione). Acta Crystallographica Section C, 61 (4). O201-O203. ISSN 0108-2701 Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1107/S0108270105003756 Abstract/SummaryThe title compound, C21H28O4, a synthetic glucocorticoid, crystallizes with a single molecule in the asymmetric unit. Ring A is almost in a half-chair conformation, rings B and C are almost in chair conformations, and ring D is between a twist and a 13 beta-envelope conformation. The A/B ring junction is quasi-trans, whereas the B/C and C/D ring junctions both approach trans characteristics. The molecule as a whole is slightly convex towards the beta side, with an angle of 9.60 (2)degrees between the C10-C19 and C13-C18 vectors. Molecular-packing and hydrogen-bonding (both intra- and inter-molecular) interactions play a major role in the structural association of the compound.
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