CAS 160291-45-2 appears in our catalog under these names: N-[2-(DANSYLAMINO)ETHYL]MALEIMIDE BIORE&, N-(2-MALEIMIDOETHYL)-5-DIMETHYLAMINO-1-NAPHTHALENESULFONAMIDE, 5-(Dimethylamino)-N-(2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)ethyl)naphthalene-1-sulfonamide, 97%, 97%. Offered by: Sigma-Aldrich, Fluorochem, Chemat. Available pack sizes: 5MG, 25mg.