Received 15 May 2009
In the title compound, C21H30N2O, there are five fused rings. The A and C rings adopt chair conformations, ring B adopts an 8,9-half-chair conformation and ring D adopts a 14-envelope conformation. The pyrazole ring is planar. Intermolecular O-HN hydrogen bonds [HN = 1.88 (5) Å] help to stabilize the crystal structure. The absolute structure was deduced from those of the starting materials.
Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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: RK2148 ).
The authors acknowledge Miss Wang Jingmei, Center of Analysis and Measurement, Fudan University, for her help with the crystal structure analysis.
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