Butyzamide is an effective and oral Mpl activator. It is a novel non-peptide-based molecule with antagonistic effects on thrombopoietin (TPO) receptors, which promotes proliferation of human Mpl (hMpl) expression and mouse pro B cell line Ba/F3. The phosphorylation of JAK2, STAT3, STAT5 and MAPK is induced. Butyzamide has been shown to help increase platelet levels in mouse xenotransplantation trials.