Table 3. 1H NMR and 13C NMR-chemical shifts of GSP-2 a , b .
Glycosyl residue | H-1/C-1 | H-2/C-2 | H-3/C-3 | H-4/C-4 | H-5/C-5 | H-6a,H-6b/C-6 |
β-D-Glcp-(1→ | 4.72 | 3.22 | 3.43 | 3.44 | 3.40 | 3.62, 3.82 |
A | 103.3 | 73.8 | 75.8 | 70.2 | 76.0 | 60.9 |
→3)-β-D- Glcp-(1→ | 4.70 | 3.42 | 3.65 | 3.35 | 3.38 | 3.62, 3.82 |
B | 103.3 | 73.8 | 84.4 | 70.0 | 76.3 | 60.9 |
→4)-β-D -Glcp-(1→ | 4.42 | 3.22 | 3.36 | 3.58 | 3.60 | 3.61, 3.80 |
C | 103.3 | 74.0 | 73.9 | 78.5 | 75.1 | 60.9 |
→6)-β-D-Glcp-(1→ | 4.41 | 3.22 | 3.43 | 3.44 | 3.58 | 3.77, 4.12 |
D | 103.3 | 73.8 | 76.0 | 68.8 | 75.8 | 69.2 |
→3,6)-β-D-Glcp-(1→ | 4.45 | 3.48 | 3.65 | 3.43 | 3.58 | 3.77, 4.12 |
E | 103.3 | 73.9 | 84.4 | 68.8 | 76.0 | 69.2 |
Measured in 500/125 MHz, δ in ppm.
Values of 13C chemical shift were record with reference to TMS as internal standard.