Received 18 September 2009
In the title compound, C15H11NO4, the dihedral angle formed by the benzene ring and isobenzofuran ring system is 67.82 (5) Å. The crystal structure is stabilized by intermolecular O-HO and N-HO hydrogen-bonding interactions.
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BQ2162 ).
We acknowledge the financial support of the Natural Science Foundation of China (No. 20771053) and the Natural Science Foundation of Shandong Province (Y2008B48). This work was also supported by the `Students Technology Cultural Innovation Fund' of Liaocheng University.
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