Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Table 2

Structure characterization of APS1 and APS2 by ¹H NMR spectra.

	Composition	Chemical shifts (δppm)
		H-1	H-2	H-3	H-4	H-5	H-6
APS1	(1 → 6)-α-D-Glcp	4.89	3.48	3.63	3.40	3.85	3.64
	(1 → 4)-α-D-Glcp	5.33	3.55	3.87	3.56	3.73	3.70
	β-D-Glcp	5.18
	(1 → 6)-α-D-Gal	5.10
	(1→)-α-D-Rha	5.08
	(1 → 4)-GalA	4.96
APS2	(1 → 6)-α-D-Glcp	4.87	3.46	3.63	3.42	3.87	3.63
	(1 → 4)-α-D-Glcp	5.31	3.53	3.88	3.54	3.76	3.71
	β-D-Glcp	5.19
	(1 → 6)-α-D-Gal	5.12
	(1→)-α-D-Rha	5.08
	(1 → 4)-GalA	4.97

Gal: galactose; Glcp: glucose; Rha: rhamnose; GalA: glucuronic acid.