LU-53439 (Atibeprone) is a selective MAO-B inhibitor with antidepressant potential in early research, but it showed no anticonvulsant efficacy in key animal models and was never advanced to the market.
Related images
Some representative structures of MAO inhibitors used in research or clinical practice: Iproniazide, Pargiline, Moclobemide, Ro 41-1049, CSC, Toloxatone, LU-53439.