A PAD2 and PAD4 inhibitor (IC50s = 0.5-1 and 1-5 μM, respectively); inhibits the growth of U2OS osteosarcoma cells (IC50 = ~2.5 μM) in a p53-dependent manner; reduces tumor growth in a S-180 murine sarcoma tumor model at 10 mg/kg; inhibits tumor growth in the 1883 MDA-MB-231 breast cancer bone metastasis mouse xenograft model,