2-butylamino-3-(4-fluorophenyl)-6,8-diphenyl-3,5,6,8-tetrahydro-4H-thiopyrano[4′,3′:4,5]thieno[2,3-d]pyrimidin-4-one

In the title molecule, C31H28FN3OS2, the two fused rings of the thieno[ 3,2-d] pyrimidine group form a dihedral angle of 4.99 ( 12)degrees, and the benzene ring of the 4-fluorophenyl group forms a dihedral angle of 77.44 ( 15)degrees with the pyrimidine ring. The thiopyran ring is in a half-chair conformation. The crystal packing is stabilized by weak intermolecular C - H center dot center dot center dot N hydrogen bonds and weak pi-pi interactions with a centroid centroid distance of 3.900 ( 1) angstrom. The C atoms of the n-butyl group are disordered over two sites with approximate occupancies of 0.60 and 0.40.