10-(1,3-Benzothia-zol-2-yl)-1,1,7,7-tetra-methyl-2,3,6,7-tetra-hydro-1H,5H,11H-pyrano[3,2-g]pyrido[3,2,1-hi]quinoline.

In the title compound, C(26)H(26)N(2)O(2)S, the dihedral angle between the benzothia-zole and coumarin rings is 8.34†(7)°, indicating that the overall benzothia-zole substituent is almost coplanar with the coumarin rings. An intra-molecular S⋯O [2.813†(1)†à ] contact may help to stabilize the mol-ecular conformation. In the crystal structure, π-π stacking inter-actions [centroid-centroid distances = 3.480†(2)†à ] link pairs of mol-ecules.