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In the crystal of the title compound, C8H8ClN3S, molecules are connected by N—H[cdots, three dots, centered]S hydrogen bonds into strips parallel to the (112) planes and running along [110]. One of the amino H atoms is not involved in a classical hydrogen bond. In addition, there is a rather short intermolecular Cl ... S distance of 3.3814 (5) Å.
The two rings in the title compound, C11H12N2O4S, are roughly coplanar [dihedral angle = 6.77 (8)°]. Whereas the two outer methyl groups of the three methoxy groups are almost coplanar with the aromatic ring to which they are attached [C—C—O—C torsion angles = 8.5 (3) and -8.3 (3)°], the methyl group of the central methoxy substituent is not [C—C—C—C = -78.4 (3)°]. The crystal packing is stabilized by N—H ... O hydrogen bonding.