CAS 210421-74-2 appears in our catalog under these names: Sitaxsentan Sodium, Sitaxsentan sodium/ 99%, Sitaxentan sodium, Sitaxsentan sodium 98%, 4-Chloro-3-methyl-5-[2-[2-(6-methyl-1,3-benzodioxol-5-yl)acetyl]-3-thienylsulfonamido]isoxazole sodium salt, 98%, 98%. Offered by: TRC, TargetMol, GLPBio, Biosynth, Ambeed. Available pack sizes: 500mg, 5mg, 10mg, 25mg, 50mg, 100mg, 200mg, 10mM (in 1ml water).