Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 7 (July 2013)


organic compounds



hb7083 scheme

Acta Cryst. (2013). E69, o1087    [ doi:10.1107/S1600536813015729 ]

8[beta]-Ethoxyeremophil-3,7(11)-diene-8[alpha],12;6[alpha],15-diolide

D.-Q. Fei, L.-L. Dong, H.-H. Li and Z.-X. Zhang

Abstract: The title compound, C17H20O5, an eremophilane sesquiternoid, was isolated from the roots of Ligularia lapathifolia. The molecule contains four fused rings of which the six-membered ring A adopts a half-chair conformation, the six-membered ring B adopts a chair conformation, the five-membered ring C is almost planar (r.m.s. deviation = 0.015 Å) and the five-membered ring D adopts an envelope conformation with the quaternary C atom as the flap. The methyl and the ethoxy groups adopt a syn conformation and the A/B ring junction is cis-fused. No directional intermolecular interactions could be identified in the crystal.


htmldisplay filedownload file

Hyper-Text Markup Language (HTML) file
[ doi:10.1107/S1600536813015729/hb7083sup0.html ]
Supplementary materials


Notes:

To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

 bibliographic record in  format

  Find reference:   Volume   Page   
  Search:     From   to      Advanced search

Copyright © International Union of Crystallography
IUCr Webmaster