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(a) The levels of ROS induced by curcumin, compound 5, and compound 6 in concentrations of 6.25 and 25 µM in MCF-7, MDA-MB-231, and HaCaT cell lines after 24 h of incubation. The results were presented as a percentage of control (mean ± SD, n = 3, * p < 0.0001; ** p < 0.01); (b) Western blot of PTP1B expression in cancer cells.
