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The title compound, C9H9N3O3S, crystallizes with two independent molecules in P21, although the symmetry is close to P21/c. The keto tautomer is the only solid-state form. The main difference between the two molecules is the orientation of the phenyl rings. The five-membered rings are planar. An extensive hydrogen-bonding system connects the molecules into layers parallel to the xy plane.

Supporting information


Crystallographic Information File (CIF)
Contains datablocks cheiro, global


Structure factor file (CIF format)
Contains datablock cheiro

CCDC reference: 129782

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