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(a) Effect of compound 18o on the percentage of annexin V-FITC positive staining in HepG-2 cancer cells, the cells were treated with DMSO as control and with doxorubicin as a positive control, for 24 h. (b) Effect of compound 18a on the percentage of annexin V-FITC positive staining in MCF-7 cancer cells, the cells were treated with DMSO as control and with doxorubicin as a positive control, for 24 h.
