Synonyms: alpha-MaleiMidopropionyl-oMega-succiniMidyl-6(ethylene glycol);Mal-PEG6-NHS;α-MaleiMidopropionyl-ω-succiniMidyl-6(ethylene glycol);25-(2,5-Dihydro-2,5-dioxo-1H-pyrrol-1-yl)-23-oxo-4,7,10,13,16,19-hexaoxa-22-azapentacosanoic acid 2,5-dioxo-1-pyrrolidinyl ester