HI042 is a FMS-like Tyrosine Kinase 3 (FLT3) inhibitor. HI042 shows IC50 values of 0.62 μM for MOLM-13, 0.33 μM for MV4-11, and 0.89 μM for OCI-AML3 cells. HI042 selectively reduces the viability of FLT3-internal tandem duplication (FLT3/TD) mutations-positive cell lines, induces apoptosis, disrupts cell cycle progression, and diminishes the clonogenic potential. HI042 can be used for the research of acute myeloid leukemia (AML).

Tuspetinib (HM43239) dihydrochloride is an orally active and selective FLT3 inhibitor with IC50s of 1.1 nM, 1.8 nM and 1.0 nM for FLT3 WT, FLT3 internal tandem duplication (ITD) and FLT3 D835Y kinases, respectively. Tuspetinib dihydrochloride inhibits the kinase activity of FLT3 as a reversible type I inhibitor and modulates p-STAT5, p-ERK, SYK, JAK1/2, and TAK1. Tuspetinib dihydrochloride inhibits the proliferation and induces the apoptosis of leukemic cells.

MolPort-002-705-878 is a highly selective FMS-like tyrosine kinase 3 (FLT3) inhibitor with a binding affinity of −11.33 kcal/mol. MolPort-002-705-878 inhibits the proliferation of FLT3-mutated acute myeloid leukemia (AML) cells. MolPort-002-705-878 is promising for research of FLT3-mutated AML.

Lomonitinib is a highly potent and selective pan-FLT3/IRAK4 inhibitor with antitumor activity. Lomonitinib is promising for research of myeloid leukemia.

HSN748 is a Ponatinib, and exhibits inhibitory activity against heparanase. Pixatimod free acid binds to the S1 receptor binding domain (RBD) of the SARS-CoV-2 virus, that inhibits SARS-CoV-2 isolate strains with EC50 of 2.4-13.8 µg/mL. Pixatimod free acid is an agonist for TLR9 signaling pathway, enhances the activity of dendritic cells (DCs), activates natural killer cells, and exhibits immunomodulatory and anti-tumor activities.

FW-1 is a type I inhibitor for FLT3 with IC50 of ca. 1 μM. FW-1 exhibits cytotoxicity in FLT3 mutated AML cell. FW-1 arrests the cell cycle at G0/G1 phase, and induces apoptosis in cell MV4-11 and MOLM-13.

Clifutinib (Compound 9e) is an orally active and selective internal tandem duplication mutation of FMS-like tyrosine kinase 3 (FLT3-ITD) inhibitor with an IC50 value of 15.1 nM. Clifutinib inhibits the activity of FLT3-ITD kinase and blocks the downstream RAS/MAPK, PI3K/AKT, and JAK/STAT5 signaling pathways of FLT3. Clifutinib induces apoptosis of acute myeloid leukemia (AML) cells with FLT3-ITD mutations. Clifutinib is promising for research of relapsed/refractory FLT3-ITD-positive acute myeloid leukemia.

CHEMBL4444839 is an inhibitor of FLT3 and can be used in the research of acute myeloid leukemia (AML).

CG-3-246 is a dual inhibitor of FLT3/BCL-2, with the Kds of 63 and 4.25 nM, respectibely. CG-3-246 plays an important role in acute myeloid leukemias research.

ATH686 (ATH-686) is a potent and selective, second-generation inhibitor of mutant FLT3 protein kinase.

MAX-40279 hemifumarate is a dual and potent inhibitor of FLT3 kinase and FGFR kinase. MAX-40279 hemifumarate has the potential for the research of acute myelogenous leukemia (AML) (extracted from patent WO2021180032).

MAX-40279 hemiadipate is a dual and potent inhibitor of FLT3 kinase and FGFR kinase. MAX-40279 hemiadipate has the potential for the research of acute myelogenous leukemia (AML) (extracted from patent WO2021180032).

MAX-40279 is a dual and potent inhibitor of FLT3 kinase and FGFR kinase. MAX-40279 has the potential for the research of acute myelogenous leukemia (AML) (extracted from patent WO2021180032).

FLT3/AXL inhibitor

YHJ1039 is a broad-spectrum kinase inhibitor, possesses excellent potencies against FLT3 mutants (FLT3 D835Y, IC50=0.41 nM) as well as FAK (IC50=7 nM).

TSN084 (TSN 084) is a unique small molecule multi-kinase inhibitor of drug-resistant mutations of c-Met, Trks, and Flt3, also inhibits other oncotargets including Axl, DDRs, and CDK8/19.

PCW-A1001 is a potent, selective inhibitor of FLT-3 (D835Y) mutant with IC50 of 764 nM, weakly inhibits WT FLT-3 with IC50 of 2.54 uM.

MBP-11901 is an orally active, multitarget tyrosine kinase inhibitor targeting FLT3, VEGFR2, PDGFRβ, and c-KIT, shows excellent inhibitory activity against HCC cell growth in vitro (HepG2, IC50=5.16 uM).

Danatinib is a potent and selective FLT3 inhibitor with IC50 of 3 nM, overcomes acquired resistance and shows effective inhibition against FLT3-ITD and/or FLT3-TKD mutations.

Quizartinib (AC220) is a second-generation FLT3 inhibitor for Flt3(ITD/WT) with IC50 of 1.1 nM/4.2 nM, 10-fold more selective for Flt3 than KIT, PDGFRα, PDGFRβ, RET, and CSF-1R. Phase 1/2.

KW 2449 is a multikinase inhibitor of FLT3, ABL, ABL-T315I, and Aurora kinase.

K03861 is a type II CDK2 inhibitor with Kd of 50 nM, 18.6 nM, 15.4 nM, and 9.7 nM for CDK2(WT), CDK2(C118L), CDK2(A144C), and CDK2(C118L/A144C), respectlvely.

G-749 is an inhibitor of Fms-like tyrosine receptor kinase 3 (FLT3) with IC50 values ranging from 2.1 to 38.1 nM for wild-type and mutant (constitutively active) FLT3s in Ba/F3 cells expressing recombinant receptors.

Crenolanib (CP-868596) is a potent and selective inhibitor of PDGFRα/β with Kd of 2.1 nM/3.2 nM, also potently inhibits FLT3, sensitive to D842V mutation not V561D mutation, >100-fold more selective for PDGFR than c-Kit, VEGFR-2, TIE-2, FGFR-2, EGFR, erbB

5'-Fluoroindirubinoxime (5’-FIO, compound 13), an Indirubin derivative, is a potent FLT3 inhibitor, with an IC50 of 15 nM.

FF-10101 (FF10101) is a potent, selective, and irreversible FLT3 inhibitor with IC50 of 0.14 nM (FLT3 Wt), covalent binds to the C695 residue of FLT3.FF-10101 potently inhibited the phosphorylation of FLT3-ITD than that of FLT3-ITD-C695S (IC50 values 2.4 nM and 79 nM, respectively).FF-10101 potently and selectively inhibits the growth of mutant FLT3-expressing leukemia cells in vitro (MV4-11 c ell, IC50=0.83 nM), potently inhibits kinase activities of wild-type FLT3 and FLT3-D835Y with IC50 values of 0.20 nM and 0.16 nM, respectively.FF-10101 demonstrated high kinase selectivity to wild-type FLT3 with >30-fold margins against the other kinases except for FMS and KIT with IC50 values of 0.94 nM and 2.0 nM, respectively.FF-10101 showed growth inhibitory effects on all tested types of FLT3-TKD mutation- and FLT3-ITD with D835Y, Y842C, Y842H, or F691L mutation-expressing 32D cells with GI50 values from 0.43 nM to 6.1 nM.FF-10101 (2, 5, and 10 mg/kg) demonstrated anti-leukemic effects in in vivo models, FF-10101 more potently inhibited the growth of tumors with FLT3-ITD-D835Y and FLT3-ITD-F691L than quizartinib.

K783-0308 is a potent and selective dual inhibitor of FLT3 and MNK2 with IC50 values of 680 and 406 nM, respectively. K783-0308 inhibits the growth of MOLM-13 (IC50=10.5 µM) and MV-4-11 (IC50=10.4 µM) cells. K783-0308 promotes acute myeloid leukemia (AML) cell apoptosis and cell cycle arrests in the G0/G1 phase.

FLT3-IN-12 is a potent, selective and orally active FLT3 kinase inhibitor with IC50s of 1.48 nM and 2.87 nM for FLT3-WT and FLT3-D835Y, respectively. FLT3-IN-12 possesses high selectivity over c-KIT (>1000-fold). FLT3-IN-12 has an excellent anti-AML (acute myeloid leukemia) activity (MV4-11, IC50 of 0.75 nM).

OTS447 is a potent FLT3 inhibitor with an IC50 of 21 nM (WO2012016082A1, compound 335).

HP1328 is a potent inhibitor of FLT3 receptor tyrosine kinase (FLT3/ITD mutation). HP1328 is a benzoimidazole scaffold-based compound. HP1328 significantly reduces the leukemia burden and prolongs the survival of mice with FLT3/ITD leukemia.