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. 2021 Nov 10;10(11):1794. doi: 10.3390/antiox10111794

Figure 6.

Figure 6

A549 cell viability and cell morphology of grapefruit seeds’ butanol extract (GSE3n-BuOH) and isolated pure compounds (obacunone (1), limonin (2), nomilin (3), narirutin (4) + naringin (5)). (a) Histograms of viability assay on untreated cells (Ctrl) or cells treated with TBH alone or with grapefruit seed extracts at increasing concentrations for 2 h. (b) Representative morphological images of untreated cells (Ctrl) or cells treated with TBH or cotreated with TBH and nomilin (3) at 0.1 mg/mL. * p < 0.05 compared to treated (TBH) group.