The Crystal and Molecular Structure of Versicolorin C, A Metabolite of Aspergillus versicolor

Abstract
The crystal structure of versicolorin C, C18H12O7, has been determined by the X-ray diffraction method. The crystals are monoclinic, with the space group P21/a, and with four molecules in a unit cell with dimensions of a=24.918(7), b=7.922(3), c=7.003(3) Å, and β=92.85(4)°. The structure was refined by the least-squares method to R=0.053 for 1693 non-zero reflections. There are two intramolecular hydrogen bonds. A pair of molecules related by a center of symmetry forms a dimer by means of intermolecular hydrogen bonds.

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