Fig. 5. Compound 7c inhibited the colony formation ability in SKOV3 and OVCAR3 cells. Cells were seeded into 6-well plates and treated by indicated concentrations of compound 7c for 10 days. The colonies were stained with crystal violet dye and photographed. (A) Representative images of the colony formation assay for compound 7c in SKOV3 cells. (B) Representative images of the colony formation assay for compound 7c in OVCAR3 cells. (C) Quantitative data analysis of colony numbers for compound 7c in SKOV3 cells. (D) Quantitative data analysis of colony numbers for compound 7c in OVCAR3 cells. ^★P < 0.05, ^◆P < 0.01.