The complete molecule of title compound, C(18)H(16)N(2)OS(4), is generated by crystallographic twofold symmetry, with the O atom lying on the rotation axis. The dihedral angle between the ring systems is 80.91 (2)°. In the crystal, adjacent mol-ecules are connected through π-π stacking inter-actions [centroid-centroid distance = 3.882 (2) Å], forming a three-dimensional network.