Acta Cryst. (2011). E67, o136 [ doi:10.1107/S1600536810051652 ]
Abstract: The whole molecule of the title coumarin derivative, C11H10O3, is approximately planar, with a maximum deviation of 0.116 (3) Å from the least-squares plane defined by all non-H atoms. In the crystal, adjacent molecules are linked into chains along  via intermolecular C-HO hydrogen bonds.
Online 15 December 2010
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