Fig. 4. Fluorescence confocal microscopy images of A549 cells upon incubation with compound 4. Cells were pre-incubated or not with 1 μM FCCP, and then treated with compound 4 (3 μM) for 15 min. Fluorescence images are shown in the left panels and brightfield images on the right. Quantitative analysis of the fluorescence intensity in both conditions is shown in Fig. S8.† Scale bar: 10 μm.
