Crystal structure of (E)-4-{[2-(2,4-di­nitro­phen­yl)hydrazin-1-yl­idene]meth­yl}-3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole

The title compound, C(21)H(17)N(7)O(4), is in an ‘extended’ conformation aided by an intra­molecular N—H⋯O hydrogen bond. The pyrazole ring makes dihedral angles of 29.17 (6), 65.47 (4) and 9.91 (7)°, respectively, with the phenyl, pyrrole and benzene rings. In the crystal, mol­ecules are connected by pairs of N—H⋯O and C—H⋯O hydrogen bonds, forming inversion dimers which associate into ribbons running along the b axis through complementary C—H⋯O inter­actions.