AEZS-112, also known as ZEN012, is an orally active small mol. anti-cancer drug which inhibits the polymn. of tubulin at low micromolar concns. AEZS 112 dose-dependently increased non-vital hypodiploid cells and the cytotoxic effect was least pronounced in G2 phase of the cell cycle, indicating cell death during mitosis, as detd. by FACS anal. AEZS 112 showed anti-tumor activity in human ovarian and endometrial cancer cell lines at low micromolar concns., which could not be abrogated by caspase inhibition and is therefore a good candidate for in vivo studies in these tumors.