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In the molecule of the title compound, C28H30N4O8S2·C2H6O, the benzene ring is oriented at dihedral angles of 38.50 (6) and 5.68 (5)° with respect to the trimethoxyphenyl rings, while the two trimethoxyphenyl rings are oriented at a dihedral angle of 44.18 (5)°. Intramolecular N—H...O and N—H...S hydrogen bonds result in the formation of non-planar six-, seven- and eight-membered rings. The twisting modes of the two side arms are different [C—N—C—O and C—N—C—N torsion angles = 0.1 (3) and 11.8 (3)°, respectively, in one arm, and 4.6 (3) and −11.5 (3)° in the other]. In the crystal structure, intermolecular N—H...O and O—H...O hydrogen bonds link the molecules.