8-(2-Chloro­phen­yl)-1-(4-chloro­phen­yl)-4-[(E)-(2-chloro­phen­yl)methyl­idene]-6-methyl-4,5,6,7,7a,8-hexa­hydro-1,2,4-oxadiazolo[5,4-d]pyrido[3,4-c][1,5]benzothia­zepine

In the title compound, C33H26Cl3N3OS, the oxadiazole, piperidine and benzothia­pezine rings adopt envelope, chair and twist-boat conformations, respectively. In the crystal, the mol­ecular aggregation is characterized by chains of centrosymmetrically related pairs connected through Cl⋯Cl inter­actions [3.533 (2) Å], extending parallel to (202)