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Effect of compounds 1–5 on cell viability of HaCaT keratinocytes. Cells were treated with a concentration (A) 50 and (B) 100 µg/mL of the test sample for 24 h. After treatment, the percent cell viability was measured using the 3-(4,5-dimethlthiazol-2-yl)-2,5-diphenyl tetrazolium bromide tetrazolium (MTT) assay. Graphs showed mean ± SD values of four replication. # p < 0.05 indicates significant differences from the untreated group.
