Crystal structure of (Z)-ethyl 2-{5-[(2-benzyl­idene-3-oxo-2,3-di­hydro­benzo[b][1,4]thia­zin-4-yl)meth­yl]-1H-1,2,3-triazol-1-yl}acetate

The title compound, C(22)H(20)N(4)O(3)S, features two fused six-membered rings linked to a 1,2,3-triazole ring which is attached to an ethyl acetate group. The heterocycle in the benzo­thia­zine residue has an envelope conformation with the S atom being the flap. The conformation of the ethyl acetate side chain, which is directed to the same side of the mol­ecule as the C(6) ring of the fused-ring system, may be partially established by a pair of weak intra­molecular C—H⋯O(carbon­yl) inter­actions. The three-dimensional packing is aided by inter­molecular C—H⋯O and C—H⋯N inter­actions.