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Improved cytotoxicity profile with 6G-319S. Cell viability assay with 6G-318S (A) and 6G-319S (B). A549 cells were incubated with various concentrations of the drugs and then assayed for viability at 48 h postincubation. Experimental data were fitted using a sigmoidal function. Cell viability with DMSO control was set as 100% viable. Medium alone with DMSO was set as 0% viability. n = 3.
