In the title compound, C(13)H(13)NO(4), the bicyclic quinolone fragment and the ester group are approximately orthogonal, making a dihedral angle of 83.3 (2)° and an intramolecular C-H⋯O interaction occurs. In the crystal, inter-molecular O-H⋯O hydrogen bonding generates a zigzag chain along the c axis.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3011763 | PMC |
| http://dx.doi.org/10.1107/S1600536810046453 | DOI Listing |
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