Acta Cryst. (2013). E69, o534 [ doi:10.1107/S1600536813006648 ]
Abstract: The asymmetric unit of the title compound, C9H8O2, contains two independent molecules, both of which are essentially planar (r.m.s. deviations = 0.0294 and 0.0284 Å). The C=C double bond is in an E conformation and the vinylaldehyde groups adopt extended conformations. In the crystal, molecules are linked by O-HO hydrogen bonds, forming infinite chains parallel to .
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