Selectively induces apoptosis and downregulates Bcl-XL protein expression in various human cancer cells versus normal cells in vitro. IC50 values are 0.89 and 12.6 μM for LoVo human colon cancer cell line and normal human fibroblasts respectively. Induces p21 expression and S-phase arrest in cancer cells via ERK-mediated pathways. Purity 99%. MW (observed): 300.61