Roscovitine (Seliciclib, CYC202) is a potent and selective CDK inhibitor for Cdc2, CDK2 and CDK5 with IC50 of 0.65 ?M, 0.7 ?M and 0.16 ?M in cell-free assays. It shows little effect on CDK4/6. Phase 2. *For Research & Development use only. Product is not intended for drug, household, or human consumption.