CAS 756525-89-0 appears in our catalog under these names: mal-PEG(3)-mal, N,N'-(((Oxybis(ethane-2,1-diyl))bis(oxy))bis(propane-3,1-diyl))bis(3-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)propanamide) 95%. Offered by: Iris Biotech, Ambeed. Available pack sizes: 1g, 50mg, 100mg, 250mg.