Structural characterization of a low-molecular weight linear O-acetyl-glucomannan in Lilium lancifolium from Tibet and its protected H2O2-induced oxidative stress in HUVEC cells

Chemical and Biological Technologies in Agriculture

Table 2 ¹H and ¹³C NMR spectrum assignments for LP-1

Glycosyl residues	H1	H2	H3	H4	H5	H6a	H6b
Glycosyl residues	C1	C2	C3	C4	C5	C6
→ 4)-α-D-Glcp (A)	5.33	3.45	3.67	3.95	4.32	3.73
→ 4)-α-D-Glcp (A)	93.51	72.44	72.57	81.91	76.82	63.73
Glcp-α-D-(1 → (B)	5.32	3.56	3.89	3.57	3.76	3.78	3.66
Glcp-α-D-(1 → (B)	100.41	72.88	74.67	75.11	73.34	61.95
→ 4)-2-O-acetyl-β-D-Manp-(1 → (C)	4.85	5.41	3.91	3.78	3.37	3.76	3.63
→ 4)-2-O-acetyl-β-D-Manp-(1 → (C)	101.46	72.60	71.30	77.60	76.10	61.82
→ 4)-β-D-Manp-(1 → (D)	4.67	4.02	3.72	3.71	3.45	3.81	3.65
→ 4)-β-D-Manp-(1 → (D)	100.94	71.38	72.43	77.93	76.07	61.84
→ 4)-β-D-Glcp-(1 → (E)	4.41	3.24	3.57	3.58	3.41	3.89	3.73
→ 4)-β-D-Glcp-(1 → (E)	103.90	74.17	74.63	79.46	76.69	61.67
O-acetyl group	174.77/21.69–21.94/2.06–2.10