Figure 2.
NMR characterization of degradation oligosaccharides (R = pNP). Panel I, II, III show the 1D 1H NMR spectra of compound 3, 5 and 7, respectively. Peaks corresponding to the anomeric protons of these compounds can be clearly identified. Panel IV, V show the selected H-H correlation in 2D H-H COSY spectrum of compound 5 and 7, respectively. Three sets of peaks between 3.4–3.7 ppm in 1H NMR spectrum were from glycerol that came from the dialysis membrane.
