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In the title molecule, C18H25N3O2S, the central thienopyrimidine ring system is essentially planar. The cyclohexene ring, in which the four CH2 groups are disordered in an approximately 1:1 ratio, adopts a half-chair conformation, while the morpholine ring is in a standard chair conformation. The butyl group is disordered in an approximately 2:1 ratio. In the crystal structure, weak intermolecular C—H⋯O hydrogen-bonding interactions stabilize the crystal structure. [ABSTRACT FROM AUTHOR]

In the title compound, C19H27N3OS, the central thienopyrimidine ring system is essentially planar. The cyclohexene ring adopts a half-chair conformation, while the piperidine ring is in a standard chair conformation. There is an intramolecular C—H...O hydrogen bond, which stabilizes the molecular structure. The crystal packing is stabilized by C—H...π interactions. [ABSTRACT FROM AUTHOR]