3. Results
3.1. Xanthones reduced viability of SK-MEL-28 melanoma cells
The three xanthones significantly inhibited the growth of human
melanoma SK-MEL-28 cells in a dose-dependent manner
(Fig. 1). The IC50 values were 5.92, 3.55, and 3.83 lg/ml for amangostin,
c-mangostin and 8-deoxygartanine, respectively. One