5,5-Di­phenyl-3-propyl­imidazolidine-2,4-dione

The asymmetric unit of the title compound, C18H18N2O2, consists of two independent mol­ecules differing primarily in the orientation of the propyl substituent. One of the propyl groups is disordered over two positions with an occupancy ratio of 0.859 (2):0.141 (2). The two independent mol­ecules are associated through a C—H⋯π(ring) inter­action and sheets parallel to (011) are formed from further sets of C—H⋯π(ring) inter­actions. The sheets are connected via inversion-related N—H⋯O hydrogen bonds.