CAS 851040-94-3 appears in our catalog under these names: Poly(ethylene glycol) (N-hydroxysuccinimide 5-pentanoate) ether N′-(3-maleimidopropionyl)aminoethane, Poly(ethylene glycol) (N-hydroxysuccinim. Offered by: Biosynth, Sigma-Aldrich. Available pack sizes: 100mg.