CAS 78553-23-8 appears in our catalog under these names: Fmoc-Asp(OtBu)-OSu, 95%, Fmoc–Asp(OtBu)–OSu, Fmoc-L-Asp(OtBu)-OSu, Fmoc-Asp(OtBu)-Osu, 90.0%, Fmoc-Asp(OtBu)-OSu, 98%. Offered by: Combi-blocks, GLPBio, Iris Biotech, MedChemExpress, Ambeed. Available pack sizes: 1g, 25g, 5g, 5 g, 10 g, 10g.