IC50: 2.4 μM (CDC25A), 3.9 μM (CDC25B2), 6.3 μM (CDC25B3), 5.4 μM (CDC25C), 4.6 μM (CDC25C-cat).

The effect of BN82002 on cell proliferation is evaluated in vitro on several human tumor cell lines. Menadione, which has been reported to inhibit cell proliferation, is used as a control. All of the examined cell lines are sensitive to BN82002 and Menadione in a concentration-dependent manner in the low micromolar range. The most sensitive is the pancreatic cancer cell line MIA PaCa-2 with an IC ₅₀ of 7.2 μM, and the less sensitive cell line is the colon cancer HT-29 with an IC ₅₀ of 32.6 μM. The range of activity is very similar to the one observed with menadione (5-15 μM). It is also showed that 50 μM BN82002 is a concentration that fully inhibits cell proliferation, the cell cycle distribution is only modestly affected with a slight decrease in S phase and an increase in cells containing both a G1 and a G2 DNA content, suggesting that the cells treated with BN82002 are arrested at various stages of the cell cycle.