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Fluorescence of 4 and 5 complexes detected in T98G brain tumor cells at 24 h following treatment. Fluorescence microscopy (at 40x magnification) of T98G cells incubated with 2μM of 4 and 5: (A) bright field image with 4, (B) fluorescence image with 4, and (C) bright field image with 5, (D) fluorescence image with 5. (E) Fluorescence intensity of 4 and 5 complexes detected in T98G cells at various concentrations.
