Cells were seeded at a concentration of 5 104 cell/mL in a
volume of 2 mL on a sterile cover slip in six-well tissue culture
plates. Following incubation, the medium was removed and
replaced with fresh medium plus 10% fetal bovine serum and
supplemented with compound 5f (15 mM). After the treatment
period, the cover slip with monolayer cells was inverted on a glass slide with 20 mL of AO/EB stain (100 mg/mL). Fluorescencewas read
on a Nikon ECLIPSETE2000-S fluorescence microscope (OLYMPUS
Co., Japan).