1d suppresses the growth of multiple cancer cell lines.

<p>(A) The chemical structure of <b>1d</b>. (B) Cells were treated with <b>1d</b> at 5 or 10 μg/ml or with DMSO (control) for 48 h and were analyzed using the MTT assay. Data are shown as the means of 2 independent experiments ± SEM. (C) The indicated cells were treated with <b>1d</b> (1 μg/ml) or DMSO for the indicated days and stained with crystal violet. (D) HCT116 and IMR90 cells were treated with a serial diluted <b>1d</b> for 24 h (left) and 48 h (right) and were analyzed using the MTT assay.