Acta Cryst. (2013). E69, o1799-o1800 [ doi:10.1107/S1600536813031036 ]
Abstract: The title compound, C33H42O4 [systematic name: (1S,5S,7R)-3-benzoyl-4-hydroxy-8,8-dimethyl-1,5,7-tris(3-methylbut-2-enyl)bicyclo[3.3.1]nona-3-ene-2,9-dione], has a central bicyclo[3.3.1]nonane-2,4,9-trione surrounded by tetraprenylated and benzoyl groups. The compound was recrystallized several times in methanol using both a slow evaporation method and with a crystal-seeding technique. This subsequently produced diffraction-quality crystals which crystallize in the orthorhombic space group P212121, in contrast to a previous report of a structure determination in the Pna21 space group [McCandlish et al. (1976). Acta Cryst. B32, 1793-1801]. The title compound has a melting point of 365-366 K, and a specific rotation 20 value of +51.94°. A strong intramolecular O-HO hydrogen bond is noted. In the crystal, molecules are assembled in the ab plane by weak C-HO interactions.
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