1-(4-Isopropyl­phen­yl)-5-(4-methoxy­phen­yl)pyrazolidin-3-one

In the mol­ecule of the title compound, C(19)H(22)N(2)O(2), the pyrazolidinone ring has an envelope conformation, with the C atom attached to the 4-methoxy­phenyl ring displaced by 0.354 (3) Å from the plane of the other ring atoms. The 4-iso­propyl­phenyl ring is oriented with respect to the 4-meth­oxy­phenyl ring at a dihedral angle of 88.94 (3)°. Intra­molecular C—H⋯N hydrogen bonds result in the formation of two planar five-membered rings, which are oriented with respect to the adjacent 4-isopropyl­phenyl and 4-meth­oxy­phenyl rings at dihedral angles of 4.05 (3) and 0.50 (3)°, respectively. In the crystal structure, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into centrosymmetric dimers.