Received 12 October 2012
The asymmetric unit of the title compound, C9H12O4, consists of two crystallographically independent molecules with similar conformations: essentially planar [r.m.s deviations for C6O4 = 0.0057 and 0.0137 Å] except for the central methoxy-methyl group [C-C-O-C torsion angles = 83.3 (2) and 83.9 (2)°]. In the crystal, O-HO hydrogen bonds link the molecules, generating supramolecular chains along the b axis.The three-dimensional crystal structure is stabilized by C-HO and C-H interactions.
Data collection: SMART (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); 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: TK5160 ).
We thank the Tianjin Entry-Exit Inspection and Quarantine Bureau for financial support.
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