To study whether CB11-induced apoptotic cell death was inhibited by a pan-caspase inhibitor (Z-VAD-FMK: 50 μM), a caspase-9 inhibitor (Z-LEHD-FMK: 20 μΜ), or a caspase-3 inhibitor (Z-DEVD-FMK: 20 μΜ), we co-treated NSCLC cells with these inhibitors and CB11. Here, CASP9 is linked to non-small cell lung carcinoma.