Structure of pomolic acid (PA) and effect of PA on the viability of human ovarian adenocarcinoma SK-OV-3 cells. (A) Structure of PA. (B) PA dose-dependently decreased the viability of SK-OV-3 cells. Cells were treated with different concentrations (0, 5, 15, 25, 50 μM) of PA. Following 24 h of incubation, cell viability was assessed using an MTT assay. Data are presented as mean ± standard deviation (SD). ***P<0.001, between treated and control cells.