Methyl 2,2′,7′-trihydr­oxy-1,1′-binaphthalene-3-carboxyl­ate acetone solvate

In the title compound, C₂₂H₁₆O₅, the two naphthyl units are approximately perpendicular. The 3-naphthyl­carboxyl group and the ortho-hydroxyl group are involved in an inter­molecular O—H⋯O hydrogen bond with O⋯O = 2.606 (2) Å. Mol­ecules related by a glide plane are linked by an intermolecular O—H⋯O hydrogen bond with O⋯O = 2.747 (2) Å, creating a spiral. A solvent mol­ecule is an acceptor in an O—H⋯O hydrogen bond with O⋯O = 2.700 (2) Å.