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GDC-6599

GDC-6599 (Example 8) is an orally bioavailable TRPA1 inhibitor.
GDC-6599
GDC-6599 Chemical Structure CAS No.: 2376824-99-4
Product category: TRP Channel
This product is for research use only, not for human use. We do not sell to patients.
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5mg
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Product Description
GDC-6599 (Example 8) is an orally bioavailable TRPA1 inhibitor. GDC-6599 may be utilized to study TRPA1-mediated diseases like pain. GDC-6599 is currently in Phase II clinical trials for respiratory indications.
Biological Activity I Assay Protocols (From Reference)
Targets
TRPA1[1].
ln Vitro
During the course of our research campaign, we identified an early lead molecule (1), which exhibited favorable in vitro TRPA1 potency as well as acceptable ADME properties across species. This lead was the result of an optimization campaign using ligand-based design, which focused on improving TRPA1 potency while lowering lipophilicity, and originated from a literature tool molecule. Given its overall promising physicochemical and in vitro profile coupled with demonstrated in vivo target engagement, we sought to benchmark this lead compound in exploratory toxicity studies to determine suitability for early development toward clinical use.[2]
ln Vivo
GDC-6599 is a potent, selective, and orally bioavailable TRPA1 small molecule antagonist with strong in vivo target engagement in rodent models. Several lead molecules in preclinical single- and short-term repeat-dose toxicity studies exhibited profound prolongation of coagulation parameters. Based on a thorough investigative toxicology and clinical pathology analysis, anticoagulation effects in vivo are hypothesized to be manifested by a metabolite─generated by aldehyde oxidase (AO)─possessing a similar pharmacophore to known anticoagulants (i.e., coumarins, indandiones). Further optimization to block AO-mediated metabolism yielded compounds that ameliorated coagulation effects in vivo, resulting in the discovery and advancement of clinical candidate GDC-6599, currently in Phase II clinical trials for respiratory indications.[2]
References

[1]. Discovery of TRPA1 Antagonist GDC-6599: Derisking Preclinical Toxicity and Aldehyde Oxidase Metabolism with a Potential First-in-Class Therapy for Respiratory Disease. J Med Chem. 2024 Mar 14;67(5):3287-3306. doi: 10.1021/acs.jmedchem.3c02121. Epub 2024 Mar 3. PMID: 38431835.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Exact Mass
426.121
CAS #
2376824-99-4
PubChem CID
139486484
Appearance
White to light yellow solid powder
Hydrogen Bond Donor Count
0
Hydrogen Bond Acceptor Count
7
Rotatable Bond Count
4
Heavy Atom Count
30
Complexity
687
Defined Atom Stereocenter Count
2
SMILES
CC1=NC2=C(C(=O)N1CC3=NC(=NO3)[C@H]4C[C@@H](OC4)C5=CC=C(C=C5)Cl)N(C=N2)C
InChi Key
FIBJEOLUMVIRIT-DZGCQCFKSA-N
InChi Code
InChI=1S/C20H19ClN6O3/c1-11-23-19-17(26(2)10-22-19)20(28)27(11)8-16-24-18(25-30-16)13-7-15(29-9-13)12-3-5-14(21)6-4-12/h3-6,10,13,15H,7-9H2,1-2H3/t13-,15+/m0/s1
Chemical Name
1-[[3-[(3R,5R)-5-(4-chlorophenyl)oxolan-3-yl]-1,2,4-oxadiazol-5-yl]methyl]-2,7-dimethylpurin-6-one
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: ~100 mg/mL (~234.3 mM; with ultrasonication)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.86 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween-80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), Clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of DMSO stock solution (25.0 mg/mL) to 400 μL of PEG300 and mix well; then add 50 μL of Tween-80 and mix well; finally add 450 μL of physiological saline and adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (5.86 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), Clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of DMSO stock solution (25.0 mg/mL) to 900 μL of 20% SBE-β-CD saline and mix well.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

 (Please use freshly prepared in vivo formulations for optimal results.)
Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration: mg/mL;

Method for preparing DMSO stock solution: mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation::Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Clinical Trial Information
Title:A Study To Evaluate The Efficacy, Safety, Pharmacokinetics, And Pharmacodynamic Effects Of GDC-6599 In Patients With Chronic Cough
Status:Completed
updateDate:2025-12-16
Ctid:NCT05660850

Link: https://clinicaltrials.gov/ct2/show/NCT05660850

Conditions:Chronic Refractory Cough (CRC) With Non-atopic Asthma|CRC With Atopic Asthma|Unexplained Chronic Cough|CRC With Chronic Obstructive Pulmonary Disease|CRC With Chronic Obstructive Pulmonary Disease With Chronic Bronchitis
Interventions:GDC-6599
Phase:Phase 2
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