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organic compounds
In the title molecule, C21H16O2, the naphthalene ring system is planar and the dihydronaphthalene ring is distorted from planarity. The dihydrobenzene ring adopts a flattened-boat conformation. The dihedral angle between the naphthalene and dihydronaphthalene ring systems is 64.13 (5)°. The hydroxyl and carbonyl O atoms are involved in O—HO intramolecular hydrogen bonding.