CAS 1650579-23-9 appears in our catalog under these names: N–(35–Mercapto–3,6,9,12,15,18,21,24,27,30,33–undecaoxapentatriacontyl)–5–((3aS,4S,6aR)–2–oxohexahydro–1H–thieno(3,4–d)imidazol–4–yl)pentanamide, Biotin-PEG(11)-SH, BIOTIN-PEG11-SH, 98.0%. Offered by: GLPBio, Iris Biotech, MedChemExpress. Available pack sizes: 100mg, 25mg, 50mg, 1g, 50 mg, 100 mg, 5 mg, 10 mg.