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The cell-killing efficacy of CCF treatment by MTT assay. (a) The in vitro cytotoxicity of CCF treatment of U87, U251, and DBTRG-05MG glioblastoma cells and the cell viability show the ability of CCF in killing cells. (b) The in vitro efficacy of CCF against U87 cells, (c) CCF against U251 cells, and (d) CCF against DBTRG-05MG cells. ∗ P < 0.05, ∗∗ P < 0.01, and ∗∗∗ P < 0.001 compared with the control.
