Figure 2: Fluorescent microscopy of PC12 cells after 24-h incubation with synthesized compounds at 37. °C. The cellular uptake was visualized by overlaying images obtained by bright field, GFP, and DAPI emissions: left image from bright field; middle images from DAPI, and right images from GFP emissions. a-g are contributed to non-treated cells, 7b, 7c, 7d, 7f, 7a compounds, respectively. GFP, Green fluorescent protein; DAPI, 4′,6-diamidino-2-phenylindole.