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Acta Cryst. (2005). E61, o1263-o1264 [ doi:10.1107/S160053680501041X ]
Abstract: The title compound, C9H8N2O7, is found to have an intramolecular hydrogen bond between the hydroxy group and the O atom of the carbonyl group. The molecule is essentially planar.
Online 9 April 2005
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