The title compound, C17H20N4S, generic name olanzapine, is an antipsychotic agent. The molecule consists of three fused rings (benzene, diazepine and thiophene) and an N‐methylpiperazine substituent. The boat conformation of the central 1,5‐diazepine ring defines the overall shape of the molecule. Two butterfly‐like molecules form centrosymmetric dimers stabilized by C—H⋯π interactions between their cavities. The dimers are connected by intermolecular N—H⋯N, C—H⋯N and C—H⋯S hydrogen bonds.
The title compound, C17H20N4S·CH4O, is an olanzapine 1:1 methanol solvate. A pair of olanzapine molecules forms a centrosymmetric dimer with intermolecular C—H⋯π interactions. Intermolecular host–host N—H⋯N hydrogen bonds were not found. The guest molecule is linked to host molecules through O—H⋯N, N—H⋯O and C—H⋯O hydrogen bonds.
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