Received 30 June 2013
aChemistry Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt,bFaculty of Education, Ain Shams University, Abbassia, Cairo, Egypt, and cInstitut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Postfach 3329, 38023 Braunschweig, Germany
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In the title molecule, C13H15N3O4S, the benzene and pyrazole rings are inclined to each other at 77.48 (3)°. Two amino H atoms are involved in bifurcated hydrogen bonds, viz. intramolecular N-HO and intermolecular N-HO(N). The intermolecular hydrogen bonds link the molecules related by translation in  into chains. A short distance of 3.680 (3) Å between the centroids of benzene and pyrazole rings from neighbouring molecules shows the presence of - interactions, which link the hydrogen-bonded chains into layers parallel to the ab plane.
Data collection: CrysAlis PRO (Agilent, 2012); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP (Siemens, 1994); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5421 ).
The authors acknowledge the financial support of the Ain Shams University, established and supported under the Egyptian Government Cooperative Research Centers Program.
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