Acta Cryst. (2013). E69, o541 [ doi:10.1107/S1600536813006739 ]
Abstract: In the title compound, C21H24BrNO4, the dihedral angle between the heterocyclic ring and the pendant aromatic ring is 80.20 (13)°. The hexahydroquinone [i.e. the one with the C=O group] ring adopts a sofa conformation. An intramolecular O-HO hydrogen bond generates an S(6) ring motif. The ethyl group is disordered over two sets of sites with a refined site occupancy ratio of 0.633 (10):0.366 (10). In the crystal, molecules are linked by N-HO interactions, forming chains parallel to . There are no significant C-H or - interactions in the crystal structure.
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