4-{(4Z)-4-[(2Z)-3-(4-Fluoro­anilino)-1-hy­droxy­but-2-en-1-yl­idene]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}­benzene­sulfonamide

In the title compound, C(20)H(19)FN(4)O(4)S, the pyrazole and benzene­sulfonamide rings are coplanar [dihedral angle = 5.02 (15)°] but this planarity does not extend over the entire mol­ecule, the dihedral angle between the terminal six-membered rings being 33.24 (14)°. Intra­molecular hy­droxy–hy­droxy O—H⋯O and amine–hy­droxy N—H⋯O hydrogen bonds, as a well as a tight C—H⋯O(carbon­yl) inter­action, lead to a sequence of three fused S(6) rings. Supra­molecular chains along the a axis feature in the crystal packing; these chains are stabilized by amine–sulfonamide N—H⋯O and amine–pyrazole N—H⋯N hydrogen bonds.