Burixafor (also known as TG-0054) is an orally available inhibitor of the CXC chemokine receptor 4 (CXCR4) with receptor binding and hematopoietic stem cell mobilization activities. By binding to the CXCR4 chemokine receptor, Burixafor blocks the binding and subsequent activation of stromal cell-derived factor-1 (SDF-1 or CXCL12) with the CXCR4 receptor, potentially facilitating the mobilization of hematopoietic stem and progenitor cells from the bone marrow into the bloodstream. Note: Elemental analysis shows that this compound is a salt containing 3 HBr and 3 water molecules.