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Cytotoxic effects of xanthatin on A549 cells. (A) Cell morphology under light microscopy after incubation with xanthatin at indicated concentrations for 24 h (×200); (B) Inhibitory effects of xanthatin on the cell viability of A549 cells by MTS assay. Data were presented as means ± SD by three independent experiments. Significance: * p < 0.05 versus the control; ** p < 0.01 versus the control, *** p < 0.001 versus the control.
