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CAS#: 175414-77-4

Description: Voreloxin, also known as SNS-595 or Vosaroxin, is a s mall molecule and a naphthyridine analogue with antineoplastic activity. Vosaroxin intercalates into DNA in a site-specific manner and blocks the re-ligation process carried out by topoisomerase II during DNA replication. As a result, inhibition of DNA replication, RNA and protein synthesis occurs, followed by cell cycle arrest at G2 phase and induced p53-independent apoptosis. This agent shows a favorable toxicity profile in several aspects: it does not generate reactive oxygen species, as do anthracyclines, reducing the risk of cardiotoxicity.

Synonym: SNS 595; SNS595; SNS-595; SPC595; SPC-595; SPC 595; AG7352; AG 7352; AG-7352; Voreloxin; Vosaroxin.

IUPAC/Chemical Name: 7-((3S,4S)-3-methoxy-4-(methylamino)pyrrolidin-1-yl)-4-oxo-1-(thiazol-2-yl)-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid.


Size                                          Price

10mg                                     Not available
100mg                                  Not available
1g                                          Ask price
Voreloxin (SNS-595) is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months.


Name: Voreloxin
CAS#: 175414-77-4
Chemical Formula: C18H19N5O4S
Exact Mass: 401.11577
Molecular Weight: 401.44
Elemental Analysis: C, 53.85; H, 4.77; N, 17.45; O, 15.94; S, 7.99


Solid powder
>98% (or refer to the Certificate of Analysis)
Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition:
Dry, dark and at 0 – 4 C for short term (days to weeks) or -20 C for long term (months to years).
Soluble in DMSO, not in water
Shelf Life:
>2 years if stored properly
Drug Formulation:
This drug may be formulated in DMSO
Stock Solution Storage:
0 – 4 C for short term (days to weeks), or -20 C for long term (months).



SNS-595 is a novel naphthyridine analog, structurally related to quinolones, a class of compounds which has not been used previously in the treatment of cancer.  Sunesis researchers conducted in vitro and cell-based studies elucidating SNS-595’s mechanism of action. SNS-595 selectively intercalates DNA and poisons topoisomerase II, resulting in replication-dependent DNA damage, irreversible G2 arrest and rapid apoptosis. SNS-595’s targeted DNA-topoisomerase II interactions may contribute to the broad therapeutic window observed in patients treated with SNS-595. SNS-595 avoids common drug resistance pathways and may have advantages over other topoisomerase poisons


1: Evanchik MJ, Allen D, Yoburn JC, Silverman JA, Hoch U. Metabolism of (+)-1,4-dihydro-7-(trans-3-methoxy-4-methylamino-1-pyrrolidinyl)-4-oxo-1-(2-thiaz olyl)-1,8-naphthyridine-3-carboxylic acid (voreloxin; formerly SNS-595), a novel replication-dependent DNA-damaging agent. Drug Metab Dispos. 2009 Mar;37(3):594-601. Epub 2008 Dec 12. PubMed PMID: 19074528.

2: Hoch U, Lynch J, Sato Y, Kashimoto S, Kajikawa F, Furutani Y, Silverman JA. Voreloxin, formerly SNS-595, has potent activity against a broad panel of cancer cell lines and in vivo tumor models. Cancer Chemother Pharmacol. 2009 Jun;64(1):53-65. Epub 2008 Oct 19. PubMed PMID: 18931998.

3: Mills DA, Fekrazad HM, Verschraegen CF. SNS-595, a naphthyridine cell cycle inhibitor and stimulator of apoptosis for the treatment of cancers. Curr Opin Investig Drugs. 2008 Jun;9(6):647-57. Review. PubMed PMID: 18516764.

4: Srivastava SK, Jha A, Agarwal SK, Mukherjee R, Burman AC. Synthesis and structure-activity relationships of potent antitumor active quinoline and naphthyridine derivatives. Anticancer Agents Med Chem. 2007 Nov;7(6):685-709. Review. PubMed PMID: 18045063.

5: Tsuzuki Y, Tomita K, Shibamori K, Sato Y, Kashimoto S, Chiba K. Synthesis and structure-activity relationships of novel 7-substituted 1,4-dihydro-4-oxo-1-(2-thiazolyl)-1,8-naphthyridine-3-carboxylic acids as antitumor agents. Part 2. J Med Chem. 2004 Apr 8;47(8):2097-109. PubMed PMID: 15056007.

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