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Ritlecitinib Tosylate

CHEMBL5314649 Phase 4 Approved Small molecule
Half-Life
—
Bioavailability
—
Protein Binding
—
Molecular Weight
457.5 g/mol
LogP
—
Phase
4

Ritlecitinib tosylate is the tosylate salt form of ritlecitinib, an irreversible JAK3 and TEC family kinase inhibitor approved for alopecia areata. See ritlecitinib for complete pharmacological details.

Molecular Weight

457.5000 g/mol

TPSA

137.00 Ų

Mechanism of Action

Irreversibly inhibits Bruton's tyrosine kinase (BTK), a key enzyme in the B-cell receptor signaling pathway that drives the survival and proliferation of malignant B cells.

Pharmacokinetics (PK)

Pharmacodynamics (PD)

Mechanism

Irreversibly inhibits Bruton's tyrosine kinase (BTK), a key enzyme in the B-cell receptor signaling pathway that drives the survival and proliferation of malignant B cells.

2D Structure

SVG PNG

Cite this structure


                        

                            
                            
                        

                    

                


                
                

                    

                    

                        
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SMILES

                    
C=CC(=O)N1C[C@H](Nc2ncnc3[nH]ccc23)CC[C@@H]1C.Cc1ccc(S(=O)(=O)O)cc1

                

                

                
                

                    
InChI

                    
InChI=1S/C15H19N5O.C7H8O3S/c1-3-13(21)20-8-11(5-4-10(20)2)19-15-12-6-7-16-14(12)17-9-18-15;1-6-2-4-7(5-3-6)11(8,9)10/h3,6-7,9-11H,1,4-5,8H2,2H3,(H2,16,17,18,19);2-5H,1H3,(H,8,9,10)/t10-,11+;/m0./s1

                

                

                

                    
                    

                        
Molecular Formula

                        
C22H27N5O4S

                    

                    
                    

                        
HBD / HBA

                        
3 / 7

                    

                    
                    

                        
Rotatable Bonds

                        
4

                    

                    
                    
                    

                        
Heavy Atoms

                        
32

                    

                    
                

            


            
            

                
                


    
    
        
    
    
    
No targets recorded

    
    
Target interaction data is not yet available for this drug.

    



                
            


            
            

                
                


    
    
        
    
    
    
No interactions recorded

    
    
Drug interaction data is not yet available for this compound.

    



                
            


            
            

                
                


    
    
        
    
    
    
No side effects recorded

    
    
Side effect data is not yet available for this drug.

    



                
            


            
            
            

                
Frequently Asked Questions

                

                    
                    

                        
                        

                            
Ritlecitinib tosylate is the tosylate salt form of ritlecitinib, an irreversible JAK3 and TEC family kinase inhibitor approved for alopecia areata. See ritlecitinib for complete pharmacological details.

                        

                    

                    

                    

                    
                    

                        
                        

                            
Irreversibly inhibits Bruton's tyrosine kinase (BTK), a key enzyme in the B-cell receptor signaling pathway that drives the survival and proliferation of malignant B cells.

                        

                    

                    

                    

                    

                        
                        

                            
Yes, Ritlecitinib Tosylate is an approved drug. It has reached clinical phase 4. It is classified as a Small molecule.

                        

                    

                

            

            

            
            

            
            

            
            
{# References & Data Sources section for drug detail pages.
   Renders standard pharmacological database links plus the drug's data_sources field. #}


    
References & Data Sources

    
    
        
        
  • 
            
            
                ChEMBL — European Bioinformatics Institute (EBI).
                CHEMBL5314649.
                Open-access bioactivity database.
            
        
    • 
        
        
        
  • 
            
            
                PubChem — National Center for Biotechnology Information (NCBI).
                CID 145722621.
                Chemical information database.
            
        
    • 
        
        
        
        
    

    
Data aggregated from publicly available pharmacological databases. Last updated 2026-03-28.




        


        
        
    


    



    
Medical Disclaimer

    

        This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.
    

    

        Data sources:
        ChEMBL,
        PubChem,
        DailyMed.