Moclobemide-d 8 (Ro111163-d 8 ) is the deuterium labeled Moclobemide. Moclobemide (Ro111163) is a brain-penetrant and reversible monoamine oxidase ( MAO-A ) inhibitor with an IC 50 of 6.061 μM for hMAO-A.Moclobemide up-regulates proliferation of hippocampal progenitor cells in chronically stressed mice.