CAS 863973-20-0 appears in our catalog under these names: CbzNH-PEG3-CH2CH2NH2 95%, Benzyl (2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethyl)carbamate, 95%, 95%, CbzNH-PEG3-CH2CH2NH2, 99.59%, Benzyl (2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethyl)carbamate, 98%. Offered by: Ambeed, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 25g, 10g, 500 mg, 1 g.