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Punicalagin (PU) exhibits selective cytotoxicity on HCT 116 colorectal cancer cells as compared to CCD 841 normal colon cells. MTT assay for PU and 5-FU against HCT 116 cells (A,B) and CCD 841 cells (C,D) at 72 h. *, **, **** Significantly different from control (p < 0.05, p < 0.01, p < 0.0001); n = three independent experiments, PU: punicalagin, 5-FU: 5-fluorouracil.
