CAS 3055858-73-3 appears in our catalog under these names: 4,7,10,13,16,19,22,25,28,31-Decaoxatritriacontanoic acid, 33-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-, 2,5-dioxo-1-pyrrolidinyl ester, 95%, 95%, Mal-PEG10-NHS ester, 98.01%. Offered by: Chemat, MedChemExpress. Available pack sizes: 50mg, 100mg, 100 mg, 25 mg, 50 mg.