TOZASERTIB LACTATE

Investigational

Details

Stereochemistry	ABSOLUTE
Molecular Formula	C23H28N8OS.C3H6O3
Molecular Weight	554.664
Optical Activity	UNSPECIFIED
Defined Stereocenters	1 / 1
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

Structure Search

SMILES

C[C@H](O)C(O)=O.CN1CCN(CC1)C2=CC(NC3=NNC(C)=C3)=NC(SC4=CC=C(NC(=O)C5CC5)C=C4)=N2

InChI

InChIKey=MHFUWOIXNMZFIW-WNQIDUERSA-N

InChI=1S/C23H28N8OS.C3H6O3/c1-15-13-20(29-28-15)25-19-14-21(31-11-9-30(2)10-12-31)27-23(26-19)33-18-7-5-17(6-8-18)24-22(32)16-3-4-16;1-2(4)3(5)6/h5-8,13-14,16H,3-4,9-12H2,1-2H3,(H,24,32)(H2,25,26,27,28,29);2,4H,1H3,(H,5,6)/t;2-/m.0/s1

HIDE SMILES / InChI

Molecular Formula	C23H28N8OS
Molecular Weight	464.586
Charge	0
Count

Stereochemistry	ACHIRAL
Additional Stereochemistry	No
Defined Stereocenters	0 / 0
E/Z Centers	0
Optical Activity	NONE

Molecular Formula	C3H6O3
Molecular Weight	90.0779
Charge	0
Count

Stereochemistry	ABSOLUTE
Additional Stereochemistry	No
Defined Stereocenters	1 / 1
E/Z Centers	0
Optical Activity	UNSPECIFIED

Description
Sources: https://www.ncbi.nlm.nih.gov/pubmed/19684075
Curator's Comment: Description was created based on several sources, including https://www.ncbi.nlm.nih.gov/pubmed/14981513

Tozasertib, originally developed as VX-680 by Vertex (Cambridge, MA) and later renamed MK-0457 by Merck (Whitehouse Station, NY), was the first aurora kinase inhibitor to be tested in clinical trials. The drug, a pyrimidine derivative, has affinity for all aurora family members at nanomolar concentrations with inhibitory constant values (Ki(app)) of 0.6, 18, and 4.6 nM for aurora A, aurora B, and aurora C, respectively. Preclinical studies confirmed that tozasertib inhibited both aurora A and aurora B kinase activity, and activity has been reported against prostate, thyroid, ovarian, and oral squamous cancer cell lines. Upon treatment with tozasertib, cells accumulate with a 4N DNA content due to a failure of cytokinesis. This ultimately leads to apoptosis, preferentially in cells with a compromised p53 function. Tozasertib is an anticancer chemotherapeutic pan-aurora kinase (AurK) inhibitor that also inhibits FMS-like tyrosine kinase 3 (FLT3) and Abl. Tozasertib is currently in clinical trials as a potential treatment for acute lymphoblastic leukemia (ALL). In cellular models of cancer, tozasertib activates caspase-3 and PARP and decreases expression of HDAC, increasing apoptosis and inhibiting cell growth. In other cellular models, tozasertib inhibits cell proliferation and metastasis by blocking downstream ERK signaling and downregulating cdc25c and cyclin B. This compound also decreases tumor growth in an in vivo model of prostate cancer.

CNS Activity

Originator

Approval Year

Targets

Primary Target	Pharmacology	Potency
Serine/threonine-protein kinase Aurora-B 28 Target ID: CHEMBL2185 Sources: https://www.ncbi.nlm.nih.gov/pubmed/14981513 \| https://www.ncbi.nlm.nih.gov/pubmed/17850214	Inhibitor 8504	0.04 µM [IC50]
Serine/threonine-protein kinase Aurora-C 10 Target ID: CHEMBL3935 Sources: https://www.ncbi.nlm.nih.gov/pubmed/14981513 \| https://www.ncbi.nlm.nih.gov/pubmed/17850214	Inhibitor 8504	0.07 µM [IC50]
Tyrosine-protein kinase SRC 19 Target ID: CHEMBL3655 Sources: https://www.ncbi.nlm.nih.gov/pubmed/17850214	Inhibitor 8504	0.34 µM [IC50]
Serine/threonine-protein kinase Aurora-A 37 Target ID: CHEMBL4722 Sources: https://www.ncbi.nlm.nih.gov/pubmed/14981513 \| https://www.ncbi.nlm.nih.gov/pubmed/16451062	Inhibitor 8504	0.6 nM [Ki]
Tyrosine-protein kinase receptor FLT3 42 Target ID: CHEMBL1974 Sources: https://www.ncbi.nlm.nih.gov/pubmed/16451062	Inhibitor 8504	30.0 nM [Ki]

Conditions

Condition	Modality	Targets	Highest Phase	Product
Non-small cell lung cancer 211 Sources: https://clinicaltrials.gov/ct2/show/NCT00290550	Primary		Phase II 1147	Unknown Approved Use Unknown
Leukemia 72 Sources: https://clinicaltrials.gov/ct2/show/NCT00405054	Primary		Phase II 1147	Unknown Approved Use Unknown

C_max

Value	Dose	Analyte	Population
0.274 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	8 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 8 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
4.015 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	64 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 64 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
2.666 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	45 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 45 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
0.911 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	16 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 16 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
2.17 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	32 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 32 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
7.635 μM EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	96 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 96 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN

AUC

Value	Dose	Analyte	Population
6.4 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	8 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 8 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
90.3 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	64 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 64 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
62.9 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	45 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 45 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
18.8 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	16 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 16 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
47.2 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	32 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 32 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
167.4 μM × h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	96 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 96 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN

T_1/2

Value	Dose	Analyte	Population
9.3 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	8 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 8 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
8 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	64 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 64 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
10.2 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	45 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 45 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN
8.5 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	16 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 16 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
10.2 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	32 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 32 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
6.6 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/20386909	96 mg/m²/h 1 times / 3 weeks multiple, intravenous dose: 96 mg/m²/h route of administration: Intravenous experiment type: MULTIPLE co-administered:	TOZASERTIB LACTATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN

Overview

CYP3A4	CYP2C9	CYP2D6	hERG
substrate 1946	substrate 1193	substrate 1388

OverviewOther

Other Inhibitor	Other Substrate	Other Inducer
	CYP2E1 729 CYP2C8 810 CYP3A5 446 P-gp 2052 CYP1A2 1197 BCRP 697 CYP2A6 626 CYP2B6 776 FMO3 77 CYP2C19 1119

Drug as victim

Target	Modality	Activity
CYP2D6 1388	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	minor
CYP1A2 1197	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP2A6 626	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP2B6 776	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP2C19 1119	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP2C9 1193	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP2E1 729	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
CYP3A5 446	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	no
BCRP 697	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/26415506/	yes
CYP2C8 810	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	yes
CYP3A4 1946	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	yes
FMO3 77	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17537870/	yes
P-gp 2052	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/26415506/	yes

Sourcing

Vendor/Aggregator	ID	URL
1PlusChem LLC	1P0037KK	https://www.1pchem.com/search?query=1P0037KK
A2B Chem	AB48980	http://a2bchem.com/prod/AB48980
AChemBlock	M15323	http://www.achemblock.com/catalogsearch/result/?q=M15323
AK Scientific	W9901	https://aksci.com/item_detail.php?cat=W9901
Ambeed	A153482	http://www.ambeed.com/search/Search.html?keyword=A153482
AOBIOUS INC	AOB87770	http://aobious.com/aobious/search?search_query=AOB87770
ApexBio Technology	A4111	https://www.apexbt.com/catalogsearch/result/?q=A4111
AstaTech	41089	http://astatechinc.com/CPSResult.php?CRNO=41089
Axon MedChem	1540	https://www.axonmedchem.com/product/1540
BLD Pharm	BD161453	http://www.bldpharm.com/search/Search.html?keyword=BD161453
BOC Sciences	639089-54-6	http://www.bocsci.com/description.asp?cas=639089-54-6
Capot Chemical	22451	https://www.capotchem.com/search.do?q=22451
Cayman Chemical	13600	http://www.caymanchem.com/app/template/Product.vm/catalog/13600
Chem Scene	CS-0007	http://www.chemscene.com/goproductList/searchProductList?productObj=CS-0007
eMolecules	31507548	https://orderbb.emolecules.com/search/#?query=31507548
eMolecules	36370217	https://orderbb.emolecules.com/search/#?query=36370217
Enamine	EN300-396166	https://www.enaminestore.com/catalog/EN300-396166
eNovation Chemicals	D518798	https://www.enovationchem.com/Products.asp?SEARCHTEXT=D518798&searchbtn.x=0&searchbtn.y=0
Excenen	EX-A2179	http://www.excenen.com/searchresultlist.php?id=EX-A2179
Exclusive Chemistry	2365	http://www.exchemistry.com/chem-catalog/product-2365.html
KeyOrganics	AS-18632	http://www.keyorganicsinc.com/bionet/catalogsearch/result?q=AS-18632
mcule	MCULE-3820870579	https://mcule.com/MCULE-3820870579/
MedChem Express	HY-10161	https://www.medchemexpress.com/search.html?q=HY-10161&ft=&fa=&fp=
Molnova	M15426	https://www.molnova.com/en/serch-list.html?keywords=M15426
MolPort	MolPort-009-199-504	https://www.molport.com/shop/molecule-link/MolPort-009-199-504
MolPort	MolPort-016-631-877	https://www.molport.com/shop/molecule-link/MolPort-016-631-877
MuseChem	I004416	https://www.musechem.com/product/I004416.html
PI Chemicals	PI-42616	http://www.pipharm.com/catalog_products/PI-42616.html
Selleck Chemicals	S1048	http://www.selleckchem.com/search.html?searchDTO.searchParam=S1048
ShangHai Biochempartner	BCP000153	http://www.biochempartner.com/search_BCP000153
ShangHai Biochempartner	BCP01859	http://www.biochempartner.com/search_BCP01859
Tetrahedron	TS32736	http://www.thsci.com/search.do?q=TS32736
Toronto Research Chemicals	T700000	https://www.trc-canada.com/product-detail/?CatNum=T700000

PubMed

Title	Date	PubMed
		252160235
VX-680, a potent and selective small-molecule inhibitor of the Aurora kinases, suppresses tumor growth in vivo.	2004 Mar	14981513
Hepatic metabolism of MK-0457, a potent aurora kinase inhibitor: interspecies comparison and role of human cytochrome P450 and flavin-containing monooxygenase.	2007 Sep	17537870

Patents

Sample Use Guides

In Vivo Use Guide

IV infusion at 10 mg/m2/hour; 5-day continuous infusion every 21 days

Route of Administration: Intravenous

In Vitro Use Guide

The treatment of K562, KCL22 and CML CD34⁺ cells with Tozasertib of 20-100 nmol/L for 3 days could obviously inhibit the cell proliferation in a concentration-dependent manner.

Substance Class	Chemical Created by `admin` on `Mon Mar 31 18:29:26 GMT 2025` Edited by `admin` on `Mon Mar 31 18:29:26 GMT 2025`
Record UNII	CN8EF9N084
Record Status	`Validated (UNII)`
Record Version

Download

Name

Type

Language

TOZASERTIB LACTATE

Official Name

English

MK0457

Preferred Name

English

N-(4-((4-(4-METHYLPIPERAZIN-1-YL)-6-((5-METHYL-1H-PYRAZOL-3-YL)AMINO)PYRIMIDIN-2- YL)SULFANYL)PHENYL)CYCLOPROPANECARBOXAMIDE (2S)-2-HYDROXYPROPANOATE

Systematic Name

English

VX-680 LACTATE

Code

English

TOZASERTIB LACTATE [USAN]

Common Name

English

PROPANOIC ACID, 2-HYDROXY-, (2S)-, COMPD. WITH N-(4-((4-(4-METHYL-1-PIPERAZINYL)-6-((5- METHYL-1H-PYRAZOL-3-YL)AMINO)-2-PYRIMIDINYL)THIO)PHENYL)CYCLOPROPANECARBOXAMIDE

Common Name

English

MK-0457

Code

English

Tozasertib lactate [WHO-DD]

Common Name

English

Classification Tree Code System Code

NCI_THESAURUS

C62556