Structures of the Diels-Alder Reaction Products of Thymoquinone and 1-Vinylcyclohexene. III. 5-Isopropyl-2-methyltricyclo[8.4.0.0^2,7]tetradeca-4,9-diene-3,6-dione, C₁₈H₂₄O₂

There are two slightly different molecules in the asymmetric unit, both having an all-cis ring fusion and an overall distorted hemispherical conformation. The cyclohexenedione rings are in a distorted half-boat conformation and the cyclohexene rings are in a distorted half-chair conformation, whereas the cyclohexane rings adopt an almost ideal chair conformation.

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