CAS 2138440-81-8 appears in our catalog under these names: Pomalidomide 4'–PEG4–acid, Pomalidomide-PEG4-COOH, Pomalidomide-PEG4-COOH 95%, POMALIDOMIDE-PEG4-CO2H, Pomalidomide-PEG4-COOH, 95%, 95%. Offered by: GLPBio, Iris Biotech, Ambeed, Sigma-Aldrich, Chemat. Available pack sizes: 100mg, 25mg, 50mg, 250mg, 1g, 50 mg, 100 mg, 250 mg.