Mol­ecules of the the title compound, C21H24Cl2N2O2, are located on a twofold rotation axis, which passes through the C atom linking the two N atoms. Two intra­molecular O—H⋯N hydrogen bonds were observed. In the crystal, non-classical inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into chains along the a axis. The crystal studied was a racemic twin.