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Prostaglandin I2 (PGI2) is a potent vasorelaxant and inhibitor of human platelet aggregation that mediates its actions by binding to a specific G protein-coupled receptor, the IP receptor, on the surface of endothelial cells and platelets. The IP receptor also participates in signal transduction of the pain response, cardioprotection, and inflammation. NS 304 is a prodrug of the active form of MRE-269, which is a potent and selective agonist for the human IP receptor with a Ki value of 20 nM. In contrast to prostaglandin I2, which has a half-life of 30 seconds to a few minutes in vivo, NS 304 is long-acting. Plasma concentrations of MRE-269 remain near peak levels for more than eight hours in rats and dogs after NS 304 was administered orally.Formal Name: 2-[4-[(5,6-diphenylpyrazinyl)(1-methylethyl)amino]butoxy]-N-(methylsulfonyl)-acetamide. CAS Number: 475086-01-2. Synonyms: ACT-293987, Selexipag. Molecular Formula: C26H32N4O4S. Formula Weight: 496.6. Purity: >98%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 30 mg/ml, DMSO: 30 mg/ml, Ethanol: 50 mg/ml, PBS (pH 7.2): 1 mg/ml. lambdamax: 203, 231, 299, 366 nm. SMILES: O=C(COCCCCN(C(C)C)c1cnc(c2ccccc2)c(n1)c1ccccc1)NS(=O)(=O)C. InChi Code: InChI=1S/C26H32N4O4S/c1-20(2)30(16-10-11-17-34-19-24(31)29-35(3,32)33)23-18-27-25(21-12-6-4-7-13-21)26(28-23)22-14-8-5-9-15-22/h4-9,12-15,18,20H,10-11,16-17,19H2,1-3H3,(H,29,31). InChi Key: QXWZQTURMXZVHJ-UHFFFAOYSA-N.
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