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The title compound, C16H15BrO, contains two non-planar six-membered rings constituting a bicyclic system. One of these rings shares two C atoms with an ethano­anthracene moiety, while the second ring has bromo and hydr­oxy substituents. The bicyclic system has approximate D3 symmetry. There are two molecules in the asymmetric unit. Two strong hydrogen bonds, with D...A distances of 2.765 (2) and 2.818 (2) Å, are observed between O atoms.

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In the title compound, C23H21ClO4, the bicyclic system has approximate D3 symmetry and the four non-planar six-membered rings adopt boat conformations. Intra- and inter­molecular hydrogen bonds are effective in stabilizing the crystal structure.
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