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Prexasertib (LY2606368) is a selective checkpoint kinase 1 (CHK1) inhibitor (Ki 0.9 nM, IC50<1 nM). Prexasertib causes double-stranded DNA breaks and replication mutations, leading to apoptosis. Prexasertib has antitumor activity.

Prexasertib dihydrochloride (LY2606368) is an ATP-competitive CHK1 inhibitor (Ki: 0.9 nmol/L). in the cell-free assay, its IC50 values are 8 nM and 9 nM for CHK2 and RSK, respectively.

Cerdulatinib hydrochloride (PRT2070 hydrochloride) is an oral active, multi-targeted tyrosine kinase inhibitor with IC50 of 12 nM/6 nM/8 nM/0.5 nM and 32 nM for JAK1/JAK2/JAK3/TYK2 and Syk, respectively. Also inhibits 19 other tested kinases with IC50 less than 200 nM.

ON123300 is a potent and multi-targeted kinase inhibitor for CDK4/Ark5/PDGFRβ/FGFR1/RET/Fyn (IC50: 3.9/5/26/26/9.2/11 nM).

AD1058 is a potent and selective ATR inhibitor (IC50 = 1.6 nM) that crosses the blood-brain barrier with significant in vivo anticancer activity. It is commonly used in the study of brain metastasis and CNS metastasis by inhibiting cell proliferation, disrupting the cell cycle and inducing apoptosis.

Cerdulatinib (PRT2070) is an novel oral dual Syk/JAK inhibitor.