CAS 811442-85-0 appears in our catalog under these names: Biotin–PEG1–NH2, (3aS,4S,6aR)-N-[2-(2-Aminoethoxy)ethyl]hexahydro-2-oxo-1H-thieno[3,4-d]imidazole-4-pentanamide, 97%, 97%, Biotin-PEG1-NH2, 97.0%, Biotin-PEG1-NH2, 97%. Offered by: GLPBio, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 100mg, 50mg, 500mg, 250mg, 1g, 500 mg, 1 g, 100 mg.