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Leflunomide CAS:75706-12-6 Manufacturer Supplier

Leflunomide is an orally-available disease-modifying antirheumatic drug and was launched as Arava in the US for the treatment of rheumatoid arthritis (RA) ; it is the first and only drug to be indicated to slow down structural joint damage of RA, so addressing an unmet medical need.Leflunomide is a pro-drug that is rapidly and almost completely metabolized (half-life, <60 minutes) following oral administration to teriflunomide, the pharmacologically active α-cyanoenol metabolite.


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Application and Effect

Leflunomide is inactive, but teriflunomide inhibits pyrimidine de novo synthesis at low therapeutic doses by inhibiting dihydroorotate dehydrogenase (the rate-determining enzyme for the synthesis of UMP), decreasing DNA and RNA synthesis, and arresting the cell proliferation cycle and production of antibodies. The reduction of dihydroorotate to orotate occurs concurrently with the reduction of its cofactor, ubiquinone (coenzyme Q). The inhibition of dihydroorotate dehydrogenase by teriflunomide demonstrates noncompetitive and uncompetitive kinetics. Administration of leflunomide in patients with rheumatoid arthritis results in progressive removal of B cells and down-regulation of the immune process. 

Product Sample

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Product Packing:

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Additional Information:

Composition C12H9F3N2O2
Assay 99%
Appearance White powder
CAS No. 75706-12-6
Packing 25KG
Shelf Life 2 years
Storage Store in cool and dry area
Certification ISO.

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