Received 29 October 2011
The oxolan-2-one ring in the title compound, C12H9NO4, has an envelope conformation with the atom linking the two five-membered rings being the flap atom.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH5369 ).
This work was supported by the Scientific Research Foundation of Sichuan University of Arts and Science (No. 2010A05Z).
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