CAS 2052955-83-4 appears in our catalog under these names: DSPE–PEG–DBCO ammonium, DSPE-PEG-DBCO (MW 2000) MW 2000, DSPE-PEG-DBCO (MW 3400) MW 3400, DSPE-PEG-DBCO (MW 5000) MW 5000, DSPE-PEG(5000) DBCO. Offered by: GLPBio, Ambeed, Sigma-Aldrich, Chemat, MedChemExpress. Available pack sizes: 1mg, 5mg, 10mg, 25mg, 50mg, 100mg, 250mg, 5 mg.