In the title compound, C30H28Cl3NO5S, the pyrrolidine ring adopts an envelope conformation (with the N atom as the flap) and the thia­zine ring is in a distorted chair conformation. The mol­ecular structure shows three intra­molecular C—H⋯O inter­actions leading to self-associated ring S(6) and two S(7) motifs. In the crystal, the molecules are linked by C—H⋯O and C—H⋯Cl inter­actions. Two R 2 2(10) and one R 2 2(16) centrosymmetrically related ring motifs are observed in the unit cell and they are connected through C(6) and C(11) chain motifs extending along the b and c axes, respectively.