A control analog of the GSK3α/β inhibitor, BIO; displays minimal activity against Cdk1/Cyclin B, GSK3α/β, and Cdk5/p25 (IC50s = 92.0, 44-100, and >100 μM, respectively); AhR agonist (EC50s = 20 and 93 nM for yeast and a hepatoma cell line, respectively).