1. Anti-infection
  2. Bacterial
  3. LED209


Cat. No.: HY-19748 Purity: 98.87%
COA Handling Instructions

LED209 is a potent small molecule inhibitor of bacterial receptor QseC, is a potent prodrug that is highly selective for QseC.

For research use only. We do not sell to patients.

LED209 Chemical Structure

LED209 Chemical Structure

CAS No. : 245342-14-7

Size Price Stock Quantity
10 mg USD 50 In-stock
Estimated Time of Arrival: December 31
50 mg USD 220 In-stock
Estimated Time of Arrival: December 31
100 mg   Get quote  
200 mg   Get quote  

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Customer Review

Based on 1 publication(s) in Google Scholar

Top Publications Citing Use of Products
  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review


LED209 is a potent small molecule inhibitor of bacterial receptor QseC, is a potent prodrug that is highly selective for QseC. Target: Antibacterial LED209 has desirable pharmacokinetics and does not present toxicity in vitro and in rodents. This is a unique antivirulence approach, with a proven broad-spectrum activity against multiple Gram-negative pathogens that cause mammalian infections.The LED209 QseC inhibitor has a unique mode of action by acting as a prodrug scaffold to deliver a warhead that allosterically modifies QseC, impeding virulence in several Gram-negative pathogens.[1] LED209 is QseC sensor kinase inhibitor , as a potential lead compound to combat infections with Legionella or Mycobacterium spp. [2] LED209 inhibits the binding of signals to QseC, preventing its autophosphorylation and consequently inhibiting QseC-mediated activation of virulence gene expression. LED209 inhibits EHEC virulence traits in vitro. LED209 markedly inhibits the virulence of several pathogens in animals. Inhibition of signaling offers a strategy for the development of broad-spectrum antimicrobial drugs. [3]

Molecular Weight







Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 250 mg/mL (651.91 mM; Need ultrasonic)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.6076 mL 13.0381 mL 26.0763 mL
5 mM 0.5215 mL 2.6076 mL 5.2153 mL
10 mM 0.2608 mL 1.3038 mL 2.6076 mL
*Please refer to the solubility information to select the appropriate solvent.
Purity & Documentation

Purity: 98.87%

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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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