Galanthamine-d3 (hydrobromide) is deuterium labeled Galanthamine (hydrobromide). Galanthamine hydrobromide (Galantamine hydrobromide) is a selective, reversible, competitive, alkaloid AChE inhibitor, with an IC50 of 0.35 µM. Galanthamine hydrobromide is a potent allosteric potentiating ligand (APL) of human alpha3beta4, alpha4beta2, alpha6beta4 nicotinic receptors ( nAChRs). Galanthamine hydrobromide is developed for the research of Alzheimers disease (AD)[1][2][3].