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Acta Cryst. (2002). E58, o1272-o1274 [ doi:10.1107/S1600536802018986 ]
Abstract: The crystal structure of the title compound, C9H10O4, contains three independent molecules in the asymmetric unit, with different orientations of carboxyl groups, all linked into an infinite chain through hydrogen bonds.
Online 25 October 2002
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