As shown in Figure 4, we measured the percentage of viable cells after 72 h exposure to those compounds with high inhibitory activity against MET gene amplified lung cancer cells EBC-1 (3d, 7a, 8a, 8b and 12c) at 25 μM, and the testing was repeated twice to determine the IC50 values in these four cancer cell lines. Here, MET is linked to lung carcinoma.