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Zafirlukast Cayman Chemical Item Number 10008282 Description The cysteinyl-leukotrienes (CysLTs), LTC4 and LTD4, are potent mediators of asthma and hypersensitivity. They induce bronchoconstriction, increase microvascular permeability, and are vasoconstrictors of coronary arteries. Their biological effects are transduced by a pair of G protein-coupled receptors, CysLT1 and CysLT2.1↗,2↗,3↗ Zafirlukast is a potent, selective CysLT1 receptor antagonist sold under the trade name Accolate for the treatment of asthma as well as for the symptoms associated with allergic rhinitis.4↗,5↗,6↗ It binds to the human CysLT1 and CysLT2 receptors with IC50 values of approximately 5 and 7,400 nM, respectively.1↗,2↗,3↗ Synonyms Accolate™ Formal Name [3-[[2-methoxy-4-[[[(2-methylphenyl)sulfonyl]amino]carbonyl]phenyl]methyl]-1-methyl-1H-indol-5-yl]-carbamic acid, cyclopentyl ester CAS Number 107753-78-6 Molecular Formula C31H33N3O6S Formula Weight 575.7 Formulation A crystalline solid Purity ≥97% λmax 203, 215, 241, 299 nm Stability 2 years Storage -20°C Shipping Wet ice in continental US; may vary elsewhere SMILES COc1cc(ccc1Cc1cn(C)c2ccc(NC(=O)OC3CCCC3)cc12)C(=O)NS(=O)(=O)c1ccccc1C InCHI Code 1S/C31H33N3O6S/c1-20-8-4-7-11-29(20)41(37,38)33-30(35)22-13-12-21(28(17-22)39-3)16-23-19-34(2)27-15-14-24(18-26(23)27)32-31(36)40-25-9-5-6-10-25/h4,7-8,11-15,17-19,25H,5-6,9-10,16H2,1-3H3,(H,32,36)(H,33,35) InCHI Key YEEZWCHGZNKEEK-UHFFFAOYSA-N |