Acta Cryst. (2008). E64, o934 [ doi:10.1107/S1600536808011549 ]
Abstract: In the crystal structure of the title compound, C11H11NO4, intramolecular O-HO hydrogen bonding results in the formation of a planar five-membered ring, which is nearly coplanar with the quinoline group. Intermolecular N-HO hydrogen bonds link the molecules into centrosymmetric dimers.
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