3-(4-Chloro­phen­yl)-5-methyl-2-propyl­amino-8,9,10,11-tetra­hydro-2-benzothieno­[2′,3′;2,3]­pyrido[4,5-d]pyrimidin-4(3H)-one

The asymmetric unit of the title compound, C₂₃H₂₃ClN₄OS, contains two crystallographically independent mol­ecules in which the orientations of the propyl­amine group and chloro­phenyl rings with respect to the fused ring system are different. The terminal cyclo­hexene ring adopts a half-chair conformation. The crystal packing is stabilized by N—H...O, N—H...N and C—H...O hydrogen bonds and π–π inter­actions.