Ruxolitinib Phosphate

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** The phosphate salt form of ruxolitinib, an orally bioavailable Janus-associated kinase (JAK) inhibitor with potential antineoplastic and immunomodulating activities. Ruxolitinib specifically binds to and inhibits protein tyrosine kinases JAK 1 and 2, which may lead to a reduction in inflammation and an inhibition of cellular proliferation. The JAK-STAT (signal transducer and activator of transcription) pathway plays a key role in the signaling of many cytokines and growth factors and is involved in cellular proliferation, growth, hematopoiesis, and the immune response; JAK kinases may be upregulated in inflammatory diseases, myeloproliferative disorders, and various malignancies.

**Synonyms:** - (3R)-3-cyclopentyl-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)pyrazol-1-yl)propanenitrile Phosphate (1:1) - 1H-Pyrazole-1-propanenitrile, beta-cyclopentyl-4-(7H-pyrrolo(2,3-d)pyrimidin-4-yl)-,(betaR)-, phosphate (1:1) - INCB-18424 Phosphate - Jakafi - Jakavi - RUXOLITINIB PHOSPHATE