Crystal structure of 4-chloro-N-{5-(4-meth-oxyphen-yl)-4-[(4-meth-oxy-phen-yl)amino]-6-sulfanyl-idene-1,2,5,6-tetra-hydro-1,3,5-triazin-2-yl-idene}benzene-sulfonamide dimethyl sulfoxide disolvate.

In the structure of the title compound, C23H20ClN5O4S2·2C2H6OS, the two DMSO solvent mol-ecules are hydrogen bonded to the two NH groups of the main mol-ecule. The (modified) triazine ring is planar and is approximately perpendicular to its directly bonded meth-oxy-phenyl substituent. The bond lengths and angles indicate extensive delocalization of the multiple bonding. The packing is characterized by a large number of borderline contacts, especially 'weak' hydrogen bonds. There is no π-π stacking. The centroid of the triazine ring is involved in two short contacts, namely 2.63 Å to a phenyl hydrogen atom and 3.0509 (9) Å to a meth-oxy oxygen atom.