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Inhibition of OS cell viability by CH-5 and curcumin was tested by the MTT assay. U2OS (A), Saos-2 (B), and MG-63 (C) cells were treated with various concentrations of curcumin and CH-5 for 24 h (control: cells treated with dimethyl sulfoxide). The results are expressed as mean ± standard deviation of three individual experiments having four technical replicates per experiment for each experimental condition.
