cis-1-Ethyl-4,4,6,8-tetra­methyl-2-tosyl-2,3,3a,4,6,7,8,9-octa­hydro-1H-pyrrolo[3′,4′:3,4]pyrano[6,5-d]pyrimidine-7,9-dione

In the title compound, C22H29N3O5S, the pyrrolidine ring is cis-fused to the dihydro­pyran ring. The pyrrolidine and dihydro­pyran rings adopt twist and half-chair conformations, respectively. The mol­ecule is in a folded conformation; the sulfonyl-bound benzene ring lies over the pyrimidine­dione ring, with a weak π–π inter­action [centroid–centroid distance = 3.6147 (4) A]. A weak intra­molecular C—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked into a three-dimensional network by C—H⋯O hydrogen bonds.