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The title compound, C16H12O7S.3H2O, displays an anionic part, the deprotonated sulfonic group and a cationic part, the protonated carbonyl group, indicative of a zwitterionic structure. These two parts in different molecules are linked by hydrogen bonding involving three water molecules.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, SULFO

CCDC reference: 129523

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