CAS No. 1228585-88-3

Batch: Purity:99.93
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Vesatolimod (GS-9620) Chemical Structure
Chemical Structure
Check the Vesatolimod (GS-9620) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 4-amino-2-butoxy-8-[[3-(pyrrolidin-1-ylmethyl)phenyl]methyl]-5,7-dihydropteridin-6-one
CAS Number 1228585-88-3
Molecular Formula

C22H30N6O2
Molecular Weight (MW) 410.51
SMILES CCCCOC1=NC(=C2C(=N1)N(CC(=O)N2)CC3=CC=CC(=C3)CN4CCCC4)N
InChIKey VFOKSTCIRGDTBR-UHFFFAOYSA-N

Ordering Information

Biological Activity

Vesatolimod (GS-9620) is a potent, selective, and orally active agonist of Toll-like receptor 7 (TLR7). Activation of TLR7 by vesatolimod triggers downstream signaling via the MyD88 pathway, stimulating NF-kB and interferon regulatory factor activation. This induces the expression and secretion of type I interferons, such as IFN-alpha, and other proinflammatory cytokines, promoting robust antiviral immune responses and enhancement of innate immune cell activity. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
4-Methylpyridine 12 mg/mL
DMSO 8.8 mg/mL (21.43 mM) ; Warmed with 60°C water bath ; Ultrasonicated
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water Insoluble
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.