rac-2-(2-Chloro-6-methyl­quinolin-3-yl)-2,3-dihydro­quinolin-4(1H)-one

In the title compound, C₁₉H₁₅ClN₂O, the quinoline ring forms a dihedral angle of 43.24 (1)° with the benzene ring of the dihydroquinolinyl system. In the crystal, mol­ecules are linked through a single weak C—H...O hydrogen bond, forming ribbons which extend along (100), giving alternating zigzag mol­ecular layers which stack down the b-axis direction.