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Danshinones inhibited cell proliferation. Cell viability of tanshinone-treated (A) U−2 OS cells, (B) human cervical carcinoma HeLa cells, and (C) normal rat kidney cells NRK−49F. Cancer cells were seeded in a 96-well plate and cultured in the desired tanshinone drugs at different concentrations for 24 and 48 h, and the survival rate was detected by an MTT essay. Data are the mean ± S.D. from three independent experiments with similar results.
