Abstract
In the title compound, C19H19NO2, commonly called koenimbine, the pyran ring adopts a sofa conformation. The carbazole ring system is planar [r.m.s. deviation = 0.063 (1) Å]. A C(10) zigzag chain running along the b axis is formed through intermolecular C—H⋯O hydrogen bonds. The chains are linked via weak C—H⋯π and N—H⋯π interactions.
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