Received 14 April 2009
In the molecule of the title compound, C15H13N3O4, the dihedral angle between the pyrazole and benzene ring planes is 67.7 (1)°. The crystal structure is stabilized by an intramolecular C-HO hydrogen bond and two weak intermolecular C-HO interactions.
For the biological activity of pyrazoles, see: Lee et al. (1989); Chambers et al. (1985). For the importance of nitrile derivatives in the synthesis of some heterocyclic molecules, see: Radl et al. (2000). For related structures, see: Fu & Zhao (2007); Xiao & Zhao (2008a,b,c).
Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXTL/PC (Sheldrick, 2008); program(s) used to refine structure: SHELXTL/PC; molecular graphics: SHELXTL/PC; software used to prepare material for publication: SHELXTL/PC.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BX2204 ).
This work was supported financially by the Southeast University Fund for Young Researchers (4007041027).
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