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The title compound, C 18 H 14 N 2 O 2 , is a new oxoisoaporphine derivative synthesized by alkyl­ation of 6-chloro-1-aza­benzanthrone. The oxoisoaporphine fragment deviates significantly from planarity with a dihedral angle of 5.1 (1)° between the heterocycle and the remote benzene ring. The amino and oxo groups are involved in an intra­molecular N—H⋯O hydrogen bond, while the hy­droxy groups form inter­molecular O—H⋯N hydrogen bonds, which link pairs of mol­ecules into inversion dimers. In the dimer, two approximately parallel oxoisoaporphine fragments exhibit π–π inter­actions between the aromatic rings, the shortest centroid–centroid distance being 3.649 (3) Å.

6-[(2-Hydroxyethyl)amino]-7H-dibenzo[de,h]quinolin-7-one