Table 2. 1H chemical shifts (ppm) of the galactose and glycerol residues of glycolipids and related compounds.
| Proton | BbGL-1* | BbGL-I-Ac3 | BbGL-II | BbGL-II-Ac4 | MGDG | 1,2-Dipalmitin | Me-α-D-Galp (in D2O) | Me-β-D-Galp (in D2O) |
|---|---|---|---|---|---|---|---|---|
| H-1′ | 4.327 | 4.545 | 4.943 | 5.124 | 4.232 | 4.846 | 4.323 | |
| H-2′ | ≈3.617 | 5.184 | ≈3.84 | 5.106 | 3.550 | 3.836 | 3.509 | |
| H-3′ | ≈3.617 | 5.024 | 3.770 | 5.317 | 3.502 | 3.812 | 3.653 | |
| H-4′ | 3.877 | 5.370 | 4.096 | 5.460 | 3.896 | 3.976 | 3.931 | |
| H-5′ | 3.666 | 3.886 | 3.807 | 4.203 | 3.510 | 3.905 | 3.703 | |
| H-6′a | 4.351, 4.346 | 4.191 | 3.927 | 4.107 | 3.829 | 3.768 | 3.804 | |
| H-6′b | 4.300, 4.294 | 4.101, 4.104 | ≈3.82 | 4.075 | 3.757 | 3.742 | 3.759 | |
| OMe | 3.422 | 3.581 | ||||||
| OAc | 2.142, 2.061, 1.982 | 2.138, 2.071 | ||||||
| 2.041, 1.988 | ||||||||
| H-1″″a | 4.377 | 4.340 | 4.381 | 4.319 | ||||
| H-1″″b | 4.128 | 4.147 | 4.229 | 4.238 | ||||
| H-2″″ | 5.253 | 5.198 | 5.279 | 5.083 | ||||
| H-3″″a | 3.840 | 3.816 | 3.954 | 3.751, 3.738 | ||||
| H-3″″b | 3.634 | 3.620 | 3.723 | 3.724, 3.710 |
*
HO-2′, HO-3′, and HO-4′ signals observed at δ 2.996 (d, J 7.5 Hz), δ 2.711 (d, J 8.6 Hz), and δ 2.771 (t, J 7.0 Hz), varied with concentration, etc