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MCF‐7 cell viability following treatment with 4 e, 5 b, primaquine, SAHA, and cisplatin for 24 or 72 h at various concentrations ranging from 50 to 0.001 μm. Cell viability was measured by counting Hoechst 33342 labeled nuclei imaged by using a fluorescence microscope. Shown are average percentage cell viability compared to the untreated controls ± SD from two independent experiments.
