N-(2,4-Dioxo-1,3-thia-zolidin-3-yl)-2-(4-isobutyl-phen-yl)propanamide.

In the title compound, C(16)H(20)N(2)O(3)S, the thia-zolidine ring is approximately planar [maximum deviation = 0.020 (2) Å] and forms a dihedral angle of 86.20 (11)° with the benzene ring. The mean plane through the propanamide unit forms dihedral angles of 88.54 (12) and 76.36 (12)°, respectively, with the thia-zolidine and benzene rings. In the crystal structure, mol-ecules are linked into chains along the a axis by N-H⋯O inter-actions. These chains are inter-connected into two-dimensional arrays parallel to the ab plane by three different C-H⋯O inter-actions. The crystal structure is further stabilized by weak inter-molecular C-H⋯π and N⋯O [2.713 (2) Å] inter-actions.