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Inhibitory effects of C2 on head and neck squamous cell carcinoma (HNSCC) cells. (A) The 50% inhibitory concentration (IC50) of C2 and CDDP on different HNSCCs. (B) The inhibitory effects of C2 on normal cells (from left to right: periodontal cells, umbilical vein endothelial cells and oral mucosa cells).
