Acta Cryst. (2008). E64, o1924 [ doi:10.1107/S1600536808028559 ]
Abstract: The title compound, C10H10N2O, known as Edaravone (MCI-186), was crystallized from methanol. The two independent molecules in the asymmetric unit are linked through an O-HO hydrogen bond. One molecule adopts a ketone form, while the other adopts an enol form. In the crystal structure, molecules are linked through intermolecular N-HO hydrogen bonds, forming chains running along the b axis.
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