CAS 142929-49-5 appears in our catalog under these names: Boc–NH–PEG1–CH2COOH, Boc-O1Pen-OH*DCHA, Boc-NH-PEG1-CH2COOH 95%, 2-(2-((tert-Butoxycarbonyl)amino)ethoxy)acetic acid, 98%, 98%, Boc-NH-PEG1-CH2COOH, 98.0%. Offered by: GLPBio, Iris Biotech, Ambeed, Chemat, MedChemExpress. Available pack sizes: 100mg, 50mg, 5g, 25g, 500g, 250mg, 1g, 100g.