In the title compound C(11)H(13)N(3)OS, the aromatic ring and the dihydro-pyrazole ring are oriented orthogonally with respect to each other, making a dihedral angle of 89.92 (9)°. An intra-molecular O-H⋯S hydrogen bond occurs. In the crystal, weak N-H⋯N and N-H⋯S hydrogen bonds link the mol-ecules into a columnar stack propagating along the b axis.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201317PMC
http://dx.doi.org/10.1107/S1600536811036658DOI Listing

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