2-[2-(Methyl­amino)­benzo­yl]-2,3,4,9-tetra­hydro-1H-pyrido[3,4-b]indol-1-one

The title compound, C₁₉H₁₇N₃O₂, was obtained from fruits of Evodia Rutaecarpa. In the solid state, the dihedral angle between the 2,3,4,9-tetra­hydro-1H-pyrido[3,4-b]indol-1-one (tetra­hydro-β-carbolinone) unit and the benzoyl ring is 61.46 (3)°. In the crystal, dimers are formed through inter­molecular N—H...O hydrogen-bonding inter­actions. In addition, intra­molecular N—H...O hydrogen bonds are also observed. C—H...π contacts connect the dimers, leading to the formation of a three-dimensional supra­molecular network.