CAS 297162-48-2 appears in our catalog under these names: Br-PEG6-CH2COOtBu 95%, 1,1-Dimethylethyl 20-bromo-3,6,9,12,15,18-hexaoxaeicosanoate, 95%, 95%, Br-PEG6-CH2COOtBu. Offered by: Ambeed, Chemat, MedChemExpress. Available pack sizes: 100mg, 250mg, 1g, 5g, 10g, 50 mg, 5 mg, 250 mg.