In the title compound, C9H12N2O7S2, the nitro substituent is slightly twisted from the benzene ring [dihedral angle = 14.69 (10)°]. The mol­ecular geometry is stabilized by intra­molecular C—H⋯O hydrogen bonds, forming S(6) ring motifs. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into layers parallel to (10-2).

In the title compound, C20H22N2S2, the five-membered thia­zole ring of the 2-methyl-2,3-dihydro-1,3-benzothia­zole unit has an envelope conformation. The dihedral angle between the planar [maximum deviation of 0.014 (1) Å for the S atom] benzothia­zole ring system and the benzene ring is 78.37 (12)°. Two intra­molecular C—H⋯S hydrogen bonds are observed, forming rings of graph-set motif S(6). In the crystal, the molecules are consolidated in pairs through N—H⋯N hydrogen bonds and are arranged parallel to the b axis.