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    The title compound, C11H12O2, is an inter­mediate in the synthesis of Varenicline, a nicotinic receptor partial agonist used to treat smoking addiction. In the crystal structure, there is an intra­molecular O—H⋯O hydrogen bond that generates an S(5) ring motif. Inter­molecular O—H⋯O hydrogen bonds form centrosymmetric dimers and also link these dimers into chains along the a axis