CAS 881690-67-1 appears in our catalog under these names: 2-Methylpropan-2-amine (S)-2-((tert-butoxycarbonyl)amino)-3-(furan-2-yl)propanoate, 98%, 2–Methylpropan–2–amine (S)–2–((tert–butoxycarbonyl)amino)–3–(furan–2–yl)propanoate, 2-Methylpropan-2-amine (S)-2-((tert-butoxycarbonyl)amino)-3-(furan-2-yl)propanoate, 98%, 98%. Offered by: AmBeed, GLPBio, Chemat, Fluorochem. Available pack sizes: 250mg, 100mg, 50mg, 500mg.