CAS 1127247-34-0 appears in our catalog under these names: m–PEG2–NHS ester, MeO-EPr-NHS, NHS-m-dPEG®,, MW 245, 2,5-Dioxopyrrolidin-1-yl 3-(2-methoxyethoxy)propanoate 98%, m-PEG2-NHS ester, 98.0%. Offered by: GLPBio, Iris Biotech, Biosynth, Ambeed, MedChemExpress. Available pack sizes: 1g, 100mg, 1000mg, 250mg, 5g, 100 mg, 50 mg, 25 mg.