FIT-039 is a potent, selective CDK9 inhibitor with IC50 of 5.8 uM for CKD9/cyclin T1, suppresses the replication of HSV-1 (IC50=0.69 uM)

ICEC 0942 (CT7001) is a potent, selective, orally active CDK7 inhibitor with IC50 of 41 nM, displays 15-fold selectivity over CDK2 (IC50=578 nM).

CDK9-IN-15 is a potent small molecule CDK9 inhibitor, which can block the phosphorylation of positive transcription elongation factor b (P-TEFb) on the C-terminal region of RNA Poly-II by degradation and inhibition of CDK9, inhibit transcription, and rapidly reduce the level of intracellular mRNA, thereby causing apoptosis of tumor cells.