Received 18 January 2013
The title molecule, C21H28O5, is composed of three six-membered rings (A/B/C) and a five-membered ring (D). Ring A adopts a 1-sofa conformation, while rings B and C adopt chair conformations. Cyclopentane ring D adopts a 14-envelope conformation. In the crystal, O-HO hydrogen bonds lead to the formation of ribbons running along the a axis. The structure is further consolidated by C-HO interactions, which link the molecules head-to-tail into ribbons along the a axis.
Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; 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: PV2620 ).
This work was supported by the National High Technology Research and Development of China (2011AA02A211) and the National Natural Science Foundation of China (Nos. 21076158 and 21276196).
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