NH2-PEG-NH2;NH2-PEG-NH2 (MW:5000);NH2-PEG-NH2 average Mw400;NH2-PEG-NH2 average Mw2000;NH2-PEG-NH2 average Mw1000;NH2-PEG-NH2 average Mw4000;NH2-PEG-NH2 average Mw5000;NH2-PEG-NH2 average Mw10000;Poly(oxy-1,2-ethanediyl), α-(2-aminoethyl)-ω-(aminooxy)-