The title molecule, C19H22N6O2S2, has crystallographically imposed C-2 symmetry, with the central C atom lying on the rotation axis. The O-C-C-C torsion angle for the central chain is -59.22 (16)degrees and the dihedral angle between the planes of the benzene rings is 75.20 (7)degrees. In the crystal, N-H center dot center dot center dot O and N-H center dot center dot center dot S interactions link the molecules, forming a three-dimensional network encompassing channels running parallel to the c axis, which account for about 20% of the unit-cell volume. The contribution to the scattering from the highly disordered solvent molecules in these channels was removed with the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 918] in PLATON. The stated crystal data for M-r, mu etc. do not take these into account.