CHK1-IN-4 hydrochloride is a potent inhibitor of checkpoint kinase 1 (chk1). CHK1-IN-4 hydrochloride potently inhibits chk1 phosphorylation in the tumor cells. CHK1-IN-4 hydrochloride has anti-tumor activity.

CHK1-IN-3 is an inhibitor of checkpoint kinase 1 (CHK1; IC50: 0.4 nM).

Compound 18, also known as FLT3/CHK-IN-1, is a dual inhibitor targeting FLT3 and CHK1, exhibiting over 1700-fold selectivity towards c-KIT and significantly diminishing hERG affinity, with an IC50 of 58.4 μM. It demonstrates efficacy in suppressing tumor growth in mouse xenotransplantation models implanted with MV-4-11 cells [1].

Chk1-IN-5 is a highly effective inhibitor of checkpoint kinase 1 (Chk1), which hinders the phosphorylation of Chk1 and effectively suppresses tumor growth in a colon cancer xenograft model[1].

CHK1-IN-4 is a potent inhibitor of checkpoint kinase 1 (chk1) and potently inhibits chk1 phosphorylation in the tumor cells with anti-tumor activity.

Chk1-IN-6 is a potent, selective, and orally bioavailable CHK1 inhibitor candidate.

CHK1 inhibitor (GDC-0575 analog) is a CHK1 inhibitor.

CHK1-IN-2 is an inhibitor of checkpoint kinase 1 (CHK1; IC50: 6 nM).

CCT245737 (SRA737) is an orally active and selective Chk1 inhibitor (IC50: 1.3 nM); CCT245737 shows much less activity against Chk2 (IC50: 2440 nM).

MBM-55S is an effective inhibitor of Nek2 with an IC50 of 1 nM. MBM-55S indecus cell cycle arrest and apoptosis thereby inhibiting the proliferation of cancer cells. MBM-55S shows antitumor activities.

GDC0575 monohydrochloride (ARRY575) is a potent and selective inhibitor of cell cycle checkpoint kinase 1 (Chk1) with an IC50 of 1.2 nM. GDC-0575 specifically binds to and inhibits Chk1; this may result in tumor cells bypassing Chk1-dependent cell cycle arrest in the S and G2/M phases, which permits the cells to undergo DNA repair prior to entry into mitosis.

GDC-0425 (RG-7602) is an orally administered, selective small molecule inhibitor targeting checkpoint kinase 1 (ChK1), utilized in research focused on various malignancies [1] [2].

CCB02 is a selective CPAP-tubulin interaction inhibitor (IC50: 689 nM) with anti-tumor activity. CCB02 shows no inhibition on the cell cycle- and centrosome-related kinases, or the phosphorylation status of Aurora-A, CDK2, Plk1, Plk2, and CHK1.

ATR inhibitor 2 is an orally active, ATP-competitive, and selective ATR inhibitor (Ki <150 pM) with antitumor activity. ATR inhibitor 2 potently inhibits ATR-driven phosphorylated checkpoint kinase-1 (Chk1) phosphorylation (IC50: 8 nM).

CCT241533 is an effective and selective ATP competitive inhibitor of CHK2 (Ki: 1.16 nM; IC50: 3 nM).

AZD-7762, an effective and specific inhibitor of Chk1（IC50=5 nM）, is equally potent against Chk2 and less potent against CAM, Yes, Fyn, Lyn, Hck and Lck.

Multi-kinase-IN-6 (compound 10e) is a multikinase inhibitor that effectively impedes the activity of TrkA, ALK2, c-KIT, EGFR, PIM1, CK2α, CHK1, and CDK2. It exhibits antiproliferative effects on MCF7, HCT116, and EKVX cancer cell lines with IC50s of 3.36 μM, 1.40 μM, and 3.49 μM, respectively. Furthermore, Multi-kinase-IN-6 induces cell cycle arrest at the G1/S and G1 phases in MCF7 and HCT116 cells, respectively, and triggers apoptosis effectively [1].

PD-166285 is an effective and broadly active inhibitor of protein tyrosine kinase.

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.

Rabusertib (IC-83) is an inhibitor of the cell cycle checkpoint kinase 1 (chk1) with potential chemopotentiating activity. Rabusertib has been used in trials studying the treatment of Cancer, Solid Tumors, Advanced Cancer, Pancreatic Neoplasms, and Non-Small Cell Lung Cancer.

GDC-0575 (ARRY-575) is a highly-selective oral small-molecule Chk1 inhibitor(IC50 of 1.2 nM).

LY2880070 is a new checkpoint kinase 1 (CHK1) inhibitor for cancer therapy.

CCT241533 hydrochloride is an effective and selective ATP competitive inhibitor of CHK2 (Ki: 1.16 nM; IC50: 3 nM).

VER-00158411 is a checkpoint kinase 1 and CHK2 inhibitor (IC50: 4.4 nM and 4.5 nM, respectively).

PD-321852 is a small-molecule Chk1 inhibitor, which potentiates gemcitabine-induced clonogenic death in a panel of pancreatic cancer cell lines and evaluated the relationship between endpoints associated with Chk1 inhibition and chemosensitization. Gemcitabine chemosensitization by minimally toxic concentrations of PD-321852 ranged from minimal (<3-fold change in survival) in Panc1 cells to >30-fold in MiaPaCa2 cells. PD-321852 inhibited Chk1 in all cell lines as evidenced by stabilization of Cdc25A; in combination with gemcitabine, a synergistic loss of Chk1 protein was observed in the more sensitized cell lines.

NSC 109555 is a selective, reversible, ATP-competitive Chk2 inhibitor (IC50 = 0.2 μM) that displays no effect on a range of other kinases including Chk1 (IC50 > 10 μM). Inhibits histone H1 phosphorylation (IC50 = 0.24 μM) and attenuates mitochondrial ATP synthesis. Exhibits antiproliferative activity in a number of leukemias in vivo.

Potent Chk2 inhibitor (IC50 = 3 nM). Shows >63-fold selectivity for Chk1 over Chk2 and a panel of 84 other kinases. Inhibits Chk2 activation in response to etoposide-induced DNA damage in HT29 cells. Blocks ionizing radiation-induced apoptosis of mouse thymocytes. Caldwell et al (2011) Structure-based design of potent and selective 2-(quinazolin-2-yl)phenol inhibitors of checkpoint kinase 2. J.Med.Chem. 54 580 PMID:21186793

CHIR-124 is an effective Chk1 inhibitor (IC50: 0.3 nM). It has 2, 000-fold selectivity against Chk2, 500- to 5, 000-fold less activity against Cdc2 and CDK2/4.

GDC-0575 dihydrochloride (ARRY-575 dihydrochloride) is a selective, orally active CHK1 inhibitor (IC50: 1.2 nM) that exhibits antitumour effects.

CCT244747 is a CHK1 inhibitor (IC50: 7.7 nM) and also abrogates G2 checkpoint (IC50: 29 nM).

ZM 447439 is a selective and ATP-competitive inhibitor for Aurora A and Aurora B with IC50 of 110 nM and 130 nM, respectively. It is more than 8-fold selective for Aurora A/B than MEK1, Src, Lck and has little effect against CDK1/2/4, Plk1, Chk1, etc.

CHK-IN-1 is a dual inhibitor of CHK1 and CHK2 with antiproliferative activity.

CCT245737(S) is a highly selective oral checkpoint kinase 1 (CHK1) inhibitor.

MBM-55 is an effective inhibitor of NIMA related kinase 2 (NEK2) with an IC50 of 1 nM. MBM-55 effectively inhibits the proliferation of cancer cells by inducing cell cycle arrest and apoptosis.

PF 477736 (PF-736,PF-00477736) is a specifc, effective and ATP-competitive Chk1 inhibitor (Ki: 0.49 nM ) and also inhibits FGFR3, Aurora-A, VEGFR2, Flt3, Fms (CSF1R), Ret and Yes.

MRT00033659 is an effective broad-spectrum kinase inhibitor of CK1 (IC50=0.9 µM for CK1δ) and CHK1 (IC50=0.23 µM). MRT00033659 is a pyrazolo-pyridine analogue. It also induces p53 pathway activation and E2F-1 destabilization.

SB-218078 is less potently inhibits Cdc2 (IC50: 250 nM) and PKC (IC50: 1000 nM). SB-218078 is a potent, ATP-competitive, and cell-permeable checkpoint kinase 1 inhibitor that inhibits Chk1 phosphorylation of cdc25C (IC50: 15 nM).

A-443654 is a pan-Akt inhibitor. A-443654 has equal potency against Akt1, Akt2, or Akt3 within cells (Ki=160 pM).

PD0166285 is a potent Wee1 and Chk1 inhibitor with activity at nanomolar concentrations.PD0166285 is a novel G2 checkpoint abrogator.

Prexasertib is a potent and selective Chk1/Chk2 inhibitor. Prexasertib increases the effectiveness of conventional therapy in B-/T- cell progenitor acute lymphoblastic leukemia. LY2606368 causes replication catastrophe and antitumor effects through CHK1-d

Hesperadin(IC50=250 nM) effectively inhibits Aurora B. It potently reduces the activity of AMPK, MAPKAP-K1, MKK1, Lck, CHK1 and PHK, but it could not inhibit MKK1 activity in vivo.

GNE-900 is an ATP-competitive ChK1 inhibitor with selective and oral activity.GNE-900 inhibits ChKl and ChK2 with IC50 values of 0.0011 and 1.5 µM, respectively.GNE-900 enhances DNA damage and induces apoptosis. GNE-900 has antitumor activity.

Jaceosidin has anti-oxidative activity. Jaceosidin has anti-inflammatory activity, also a microglial inhibitor with anti-neuroinflammation activity. aceosidin has anticancer activity, modulates the ERK/ATM/Chk1/2 pathway, leading to inactivation of the Cd

Tuvusertib (M1774) is an orally available ataxia telangiectasia and Rad3-related (ATR) kinase inhibitor (Ki< 1 µΜ) with selective and potentially antitumor activity.Tuvusertib selectively inhibits ATR activity and blocks downstream phosphorylation of serine/threonine protein kinase checkpoint kinase 1 (CHK1), thereby inhibits DNA damage checkpoint activation, disrupting DNA damage repair and inducing apoptosis in tumor cells.

PD 407824 is a chemical BMP sensitiser that promotes increased cellular sensitivity to subthreshold amounts of BMP4.PD 407824 is a potent inhibitor of the checkpoint kinases Chk1 and WEE1 (IC50s: 47 and 97 nM, respectively).

Prexasertib dimesylate (LY2606368 dimesylate) is a highly selective ATP-competitive second-generation inhibitor of checkpoint kinase 1 (CHK1). With a K i of 0.9 nM and an IC 50 of <1 nM, Prexasertib dimesylate effectively inhibits CHK2 (IC 50 = 8 nM) and RSK1 (IC 50 = 9 nM). Its mechanism of action involves inducing double-stranded DNA breakage and replication catastrophe, ultimately leading to apoptosis. Moreover, Prexasertib dimesylate demonstrates potent anti-tumor activity.

Ceralasertib is an orally available inhibitor of ataxia telangiectasia and rad3 related (ATR) kinase. Ceralasertib selectively inhibits ATR activity by blocking the downstream phosphorylation of the serine/threonine protein kinase CHK1. This prevents ATR-

checkpoint kinase 1 (chk1) inhibitor

ML367 is a potent inhibitor of ATPase family AAA domain-containing protein 5 (ATAD5) stabilization and acts as a probe molecule that has low micromolar inhibitory activity

Prexasertib Mesylate Hydrate (LY2606368 Mesylate Hydrate) is an ATP-competitive, selective, second generation cell cycle detection site kinase 1 (CHK1) inhibitor (IC50<1 nM, Ki: 0.9 nM). Prexasertib Mesylate Hydrate inhibits CHK2 (IC50: 8 nM) and RSK1 (IC50: 9 nM). prexasertib Mesylate Hydrate causes double-stranded DNA breaks and replication mutations, induces apoptosis and exhibits potent anti-tumour effects.