Methyl 3-[(chloro­meth­oxy)carbon­yloxy]-7-hy­droxy­cholan-24-oate

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—H...O hydrogen bonds. Therefore each mol­ecule is linked to four neighbouring mol­ecules by four C—H...O hydrogen bonds, with the OH group at the 7-position and the carbonyl O atom of the ester group acting as the acceptor sites.