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In the title compound, C13H9NO6, the coumarin system has the benzene ring aligned at 0.61 (18)° with respect to the pyrone ring. An intramolecular O—H
O hydrogen bond stabilizes the molecular conformation and a C—HO contact also occurs. In the crystal, weak C—HO interactions link the molecules, forming inversion dimers.
O hydrogen bond stabilizes the molecular conformation and a C—HO contact also occurs. In the crystal, weak C—HO interactions link the molecules, forming inversion dimers.
