WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 206456

CAS#: 1228585-88-3

Description: Vesatolimod, also known as GS-9620, is a potent and oral agonist of Toll-like receptor-7 developed for finite treatment of chronic hepatitis B viral (HBV) infection, with the goal of inducing a liver-targeted antiviral effect without inducing the adverse effects associated with current systemic interferon-α (IFN-α) therapies. GS-9620 demonstrate interferon-stimulated gene induction without detectable serum interferon at low oral doses. GS-9620 can induce a sustained antiviral response in the woodchuck model of CHB.

Chemical Structure

CAS# 1228585-88-3

Theoretical Analysis

MedKoo Cat#: 206456
Name: Vesatolimod
CAS#: 1228585-88-3
Chemical Formula: C22H30N6O2
Exact Mass: 410.24302
Molecular Weight: 410.52
Elemental Analysis: C, 64.37; H, 7.37; N, 20.47; O, 7.79

Price and Availability

Size Price Availability Quantity
10.0mg USD 150.0 Same day
25.0mg USD 250.0 Same day
50.0mg USD 450.0 Same day
100.0mg USD 650.0 Same day
200.0mg USD 1050.0 Same day
500.0mg USD 1950.0 Same day
1.0g USD 2950.0 Same day
2.0g USD 4250.0 2 weeks
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Synonym: GS-9620; GS 9620; GS9620; Vesatolimod

IUPAC/Chemical Name: 4-amino-2-butoxy-8-(3-(pyrrolidin-1-ylmethyl)benzyl)-7,8-dihydropteridin-6(5H)-one


InChi Code: InChI=1S/C22H30N6O2/c1-2-3-11-30-22-25-20(23)19-21(26-22)28(15-18(29)24-19)14-17-8-6-7-16(12-17)13-27-9-4-5-10-27/h6-8,12H,2-5,9-11,13-15H2,1H3,(H,24,29)(H2,23,25,26)


Appearance: White to off-white solid powder

Purity: >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).

Solubility: 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).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 410.52 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Cohen J. Drug flushes out hidden AIDS virus. Science. 2015 Mar 6;347(6226):1056. doi: 10.1126/science.347.6226.1056-a. PubMed PMID: 25745141.

2: Gane EJ, Lim YS, Gordon SC, Visvanathan K, Sicard E, Fedorak RN, Roberts S, Massetto B, Ye Z, Pflanz S, Garrison KL, Gaggar A, Mani Subramanian G, McHutchison JG, Kottilil S, Freilich B, Coffin CS, Cheng W, Kim YJ. The oral toll-like receptor-7 agonist GS-9620 in patients with chronic hepatitis B virus infection. J Hepatol. 2015 Aug;63(2):320-8. doi: 10.1016/j.jhep.2015.02.037. Epub 2015 Feb 27. PubMed PMID: 25733157.

3: Menne S, Tumas DB, Liu KH, Thampi L, AlDeghaither D, Baldwin BH, Bellezza CA, Cote PJ, Zheng J, Halcomb R, Fosdick A, Fletcher SP, Daffis S, Li L, Yue P, Wolfgang GH, Tennant BC. Sustained efficacy and seroconversion with the Toll-like receptor 7 agonist GS-9620 in the Woodchuck model of chronic hepatitis B. J Hepatol. 2015 Jun;62(6):1237-45. doi: 10.1016/j.jhep.2014.12.026. Epub 2015 Jan 2. PubMed PMID: 25559326; PubMed Central PMCID: PMC4439359.

4: Lawitz E, Gruener D, Marbury T, Hill J, Webster L, Hassman D, Nguyen AH, Pflanz S, Mogalian E, Gaggar A, Massetto B, Subramanian GM, McHutchison JG, Jacobson IM, Freilich B, Rodriguez-Torres M. Safety, pharmacokinetics and pharmacodynamics of the oral Toll-like receptor 7 agonist GS-9620 in treatment-naive patients with chronic hepatitis C. Antivir Ther. 2014 Aug 8. doi: 10.3851/IMP2845. [Epub ahead of print] PubMed PMID: 25105516.

5: Fosdick A, Zheng J, Pflanz S, Frey CR, Hesselgesser J, Halcomb RL, Wolfgang G, Tumas DB. Pharmacokinetic and pharmacodynamic properties of GS-9620, a novel Toll-like receptor 7 agonist, demonstrate interferon-stimulated gene induction without detectable serum interferon at low oral doses. J Pharmacol Exp Ther. 2014 Jan;348(1):96-105. doi: 10.1124/jpet.113.207878. Epub 2013 Oct 16. PubMed PMID: 24133297.

6: Roethle PA, McFadden RM, Yang H, Hrvatin P, Hui H, Graupe M, Gallagher B, Chao J, Hesselgesser J, Duatschek P, Zheng J, Lu B, Tumas DB, Perry J, Halcomb RL. Identification and optimization of pteridinone Toll-like receptor 7 (TLR7) agonists for the oral treatment of viral hepatitis. J Med Chem. 2013 Sep 26;56(18):7324-33. doi: 10.1021/jm400815m. Epub 2013 Sep 9. PubMed PMID: 23961878.

7: Zoulim F, Luangsay S, Durantel D. Targeting innate immunity: a new step in the development of combination therapy for chronic hepatitis B. Gastroenterology. 2013 Jun;144(7):1342-4. doi: 10.1053/j.gastro.2013.04.028. PubMed PMID: 23710602.

8: Rosania K. Relying on chimpanzees for hepatitis research. Lab Anim (NY). 2013 Jun;42(6):188. doi: 10.1038/laban.317. PubMed PMID: 23689445.

9: Lopatin U, Wolfgang G, Tumas D, Frey CR, Ohmstede C, Hesselgesser J, Kearney B, Moorehead L, Subramanian GM, McHutchison JG. Safety, pharmacokinetics and pharmacodynamics of GS-9620, an oral Toll-like receptor 7 agonist. Antivir Ther. 2013;18(3):409-18. doi: 10.3851/IMP2548. Epub 2013 Feb 15. PubMed PMID: 23416308.

10: Lanford RE, Guerra B, Chavez D, Giavedoni L, Hodara VL, Brasky KM, Fosdick A, Frey CR, Zheng J, Wolfgang G, Halcomb RL, Tumas DB. GS-9620, an oral agonist of Toll-like receptor-7, induces prolonged suppression of hepatitis B virus in chronically infected chimpanzees. Gastroenterology. 2013 Jun;144(7):1508-17, 1517.e1-10. doi: 10.1053/j.gastro.2013.02.003. Epub 2013 Feb 13. PubMed PMID: 23415804; PubMed Central PMCID: PMC3691056.