CAS 169751-72-8 appears in our catalog under these names: Hydroxy–PEG4–CH2–Boc, Hydroxy-PEG4-CH2-Boc 95%, 3,6,9,12-Tetraoxatetradecanoic acid, 14-hydroxy-, 1,1-dimethylethyl ester, 98%, 98%, Hydroxy-PEG4-CH2-Boc, 99.86%, tert-Butyl 14-hydroxy-3,6,9,12-tetraoxatetradecan-1-oate, 95%. Offered by: GLPBio, Ambeed, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 25g, 10g, 50g, 5 g.