R factor = 0.037; wR factor = 0.098; data-to-parameter ratio = 23.6. In the title compound, C23H22N2O2S2, the dihedral angles between the 4-methoxy-substituted phenyl ring and the other two phenyl rings are 84.4 (4) and 77.7 (1), respectively, while the dihedral angle between the two phenyl rings is 57.5 (2). The amino group is not involved in an N—H hydrogen bond. The crystal packing is established by intermolecular C— H O packing interactions involving a relatively rare weak three-center hydrogen bond between the keto O atom and H atoms of the two nearby phenyl rings, which link the molecules into chains running along the a axis. Additional weak intermolecular hydrogen-bond interactions between the 4-methoxy O atom and one of the pheny...