| Summary: | The title compound, C18H18ClN3O3S2, adopts by folding the form of a distorted disc. Interplanar angles are 29.51 (7) and 63.43 (7)° from the five-membered ring to the aromatic systems and 34.80 (6)° between these two latter rings. The absolute configuration was confirmed by determination of the Flack parameter. In the crystal, the molecules are linked by four hydrogen bonds, one classical (N—H...N) and three `weak' (C—H...O), forming layers parallel to the ac plane; these are in turn linked in the third dimension by Cl...N [3.1689 (16) Å] and Cl...O [3.3148 (13) Å] contacts to the heterocyclic ring.
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