Acta Cryst. (2011). E67, o507  [ doi:10.1107/S1600536811002388 ]

(22E,24R)-5-Ergosta-2,22-dien-6-one

L. Sheng, F. Zeng, F. Chen and C. Xia

Abstract: In the title molecule, C₂₈H₄₄O, two six-membered rings have regular chair conformations, while the six-membered ring containing the C=C double bond exhibits a distorted chair conformation. The five-membered ring adopts an envelope conformation. In the crystal, weak intermolecular C-HO interactions link molecules into chains along the b axis. The absolute configuration was assigned to correspond with that of the known chiral centres in a precursor molecule.

Online 29 January 2011

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