Endogenous aryl hydrocarbon receptor (AhR) agonist (Ki = 3 nM). Decreases Oct4 levels in U87 glioblastoma cells. Induces stem-like cancer cell differentiation in U87 tumor spheres and inhibits ovarian cancer cell proliferation in vitro. Suppresses tumor growth in U87 and OVCAR-3 cell xenografts in mice. Also inhibits TGF-β-induced human myofibroblast differentiation. Purity 98%. MW (observed): 286.3