Indirubin-5-sulfonate shows inhibitory activity against GSK-3β. Indirubin-5-sulfonate is a cyclin-dependent kinase (CDK) inhibitor, with IC50 values of 55 nM, 35 nM, 150 nM, 300 nM and 65 nM for CDK1/cyclin B, CDK2/cyclin A, CDK2/cyclin E, CDK4/cyclin D1,
Aloisine A is a potent and selective CDK/GSK-3 inhibitor. IC50 data of Aloisine A: Cdk1/cyclin B (IC50: 150nM), Cdk2/cyclin A (IC50: 120nM), Cdk2/cyclin E (IC50: 400nM), Cdk5/p25 (IC50: 200nM), Cdk5/p35 (IC50: 160nM), GSK-3α (IC50: 500nM), GSK-3β (IC50: 6