Acta Cryst. (2013). E69, o1186
[ doi:10.1107/S160053681301725X ]
Abstract: The title compound, C27H43ClO6, is a derivative of ursodeoxycholic acid, in which the OH group at the 3-position is substituted by a chloromethoxycarbonyloxy substituent and the carboxylic acid group at the 24-position is methylated. The A and B rings are cis-fused, while all other rings are trans-fused. In the crystal, two adjacent molecules located along the b-axis direction are interlocked head-to-tail due to weak C-HO hydrogen bonds. Therefore each molecule is linked to four neighbouring molecules by four C-HO hydrogen bonds, with the OH group at the 7-position and the carbonyl O atom of the ester group acting as the acceptor sites.
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