Figure 2

(a) 1H NMR spectra of Mv-S-S-PEI and corresponding products in corresponding deuterium reagent; (b) 1H NMR spectra of Np-CH=N-PEG and its corresponding product in CDCl3.

(a) 1H NMR spectra of Mv-S-S-PEI and corresponding products in corresponding deuterium reagent; (b) 1H NMR spectra of Np-CH=N-PEG and its corresponding product in CDCl3.