Received 28 March 2013
aChemical Engineering & Pharmaceutics College, Henan University of Science and Technology, Luoyang, Henan 471003, People's Republic of China, and bCollege of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China
Correspondence e-mail: email@example.com
In the title compound, C19H17BrO3, the ring skeleton is located on a crystallographic mirror plane; two C atoms of the cyclohexene ring are disordered over the two locations to satisfy the preferred ring conformation. In the crystal, C-HO hydrogen bonds link the molecules into chains along the a axis. - stacking interactions between benzoquinone rings, with a centroid-centroid distance of 3.7225 (4) Å, are also observed, which connect the chains into a two-dimensional networkparallel to the ab plane.
The title compound is a derivative of Tanshinone IIA, the major active component isolated from the Chinese herbal medicine danshen, which is used in the treatment of coronary heart disease (Chang et al., 1991; Wang et al., 2005), myocardial infarction and angina pectoris (Xue et al., 1999) and has antitumour activity (Ryu et al., 1997). For the structure of 1,6,6-trimethyl-6,7,8,9-tetrahydrophenanthro[1,2-b]furan-10,11-dione, see: Liu & Gao (2007).
Data collection: SMART (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: KP2449 ).
We are grateful for financial support from the Natural Science Foundation of Henan Province of China (092102310075).
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