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Acta Cryst. (2010). E66, o2790  [ doi:10.1107/S1600536810039929 ]

Oleanolic acid ethanol monosolvate

A. Froelich and A. K. Gzella

Abstract: Crystals of the title compound (systematic name: 3[beta]-hydroxyolean-12-en-28-oic acid ethanol monosolvate), C30H48O3·C2H5OH, were obtained from unsuccessful co-crystallization trials. The asymmetric unit contains two symmetry-independent oleanolic acid molecules, as well as two ethanol solvent molecules. Intermolecular O-H...O hydrogen bonds stabilize the crystal packing. In the oleanolic acid molecules, ring C has a slightly distorted envelope conformation, while rings A, B, D and E adopt chair conformations and rings D and E are cis-fused. Both independent ethanol molecules are orientationally disordered [occupancy ratios of 0.742 (8):0.258 (8) and 0.632 (12):0.368 (12).

Online 9 October 2010

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