We then assessed the potential antitumor activity of compound 38 in vitro, we evaluated its effects on cell proliferation in a panel of human cell lines. The results demonstrated that compound 38 inhibited cell proliferation in these cell lines, including the cell line RS4:11 (IC 50 = 6.30 μM), MV4;11 (IC 50 = 2.23 μM), KMS11