AZD-4877 is a potent spindle kinesin (Eg5) inhibitor with an IC50 value of 2 nM. AZD-4877 is an alternative configuration of Ispinesib that inhibits mitosis, induces the formation of a unipolar spindle phenotype, and mediates apoptosis. AZD-4877 has antitumor activity and inhibits circulating peripheral blood mononuclear cells (PBMC).

UMK57 is a CENP-Ei and MCAK enhancer, selectively promoting k-MT attachment error correction to inhibit chromosome missegregation of small molecule compounds, and can improve chromosome separation conservation by disrupting the stability of kinetosomal microtubule (k-MT) attachment during mitosis.

SB-743921 hydrochloride (SB743921 HCl) is an effective inhibitor of kinesin spindle protein, KSP, (Ki =0.1 nM).

Paprotrain ((alphaZ)-alpha-(3-Pyridinylmethylene)-1H-indole-3-acetonitrile) inhibits the ATPase activity of MKLP-2 with an IC50 of 1.35 μM and a Ki of 3.36 μM.

Monastrol ((±)-Monastrol) is a potent and cell-permeable inhibitor of the mitotic kinesin Eg5.

CW-069 (IC50=75 μM), an allosteric selective inhibitor of microtubule motor protein HSET, exhibits remarkable specificity over KSP.

Eg5-IN-1 is a potent inhibitor of the kinesin family of motor proteins (Eg5) with an IC50 value of 1.97 µM for Eg5.Eg5-IN-1 can be used in cancer research.

S-trityl-L-Cysteine is a non-natural amino acid and an inhibitor of Eg5, also known as KSP and Kif11, a mitotic kinesin necessary for mitotic spindle formation. S-trityl-L-Cysteine inhibits the ATPase activity of Eg5 in basal and microtubule-stimulated states (IC50s = 1,000 and 140 nM, respectively). It is selective for Eg5 over nine other human kinesins in an enzyme-coupled assay. It reversibly inhibits Eg5-driven microtubule sliding velocity with an IC50 value of 500 nM using X. laevis recombinant Eg5. It induces cell cycle arrest in HeLa cells (IC50 = 700 nM), reversibly halting the cell cycle in the mitotic phase by inhibiting the separation of duplicated chromosomes and preventing bipolar spindle formation. S-trityl-L-Cysteine inhibits the growth of cancer cells in vitro when tested against the National Cancer Institute (NCI) 60 human cancer cell line panel (average GI50 = 1.3 μM) and in mouse xenograft models.