Figure 2 of Duan, Mol Vis 2008; 14:2616-2628.

Figure 2. The 1H NMR spectra of CS and its derivatives. Spectra were obtained with 32 scans, and delay of 2 s between pulses. A: CS in D2O and CF3COOD at 293 K, B: CS-CHO in D2O at 293 K; C: CS-g-(PEI-b-mPEG) in D2O at 293 K.