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    In the title compound, C26H23N5O7, the central benzene ring makes dihedral angles of 35.08 (6), 48.75 (7) and 69.55 (8)° with the pyrazolone ring, the nitro­benzene ring and the terminal phenyl ring, respectively. An intra­molecular C—H⋯O inter­action generates an S(6) ring. The packing is stabilized by weak nonclassical inter­molecular C—H⋯O=C hydrogen bonds that link adjacent mol­ecules into chains