Selective PARP-10 (also known as ADP-ribosyltransferase Diptheria Toxin-like 10, ARTD10) inhibitor (IC50 = 0.329 μM). Displays selectivity for PARP-10 over a panel of PARP family members. Rescues HeLa cells from PARP-10-induced cell death. Sensitizes cancer cells to hydroxyurea-induced genotoxic stress. Purity 98%. MW (observed): 256.26