Table 1.
Chemical shift of signals in 1H and 13C NMR spectra of JL2810 EPS.
| EPS | Compoumd | Residue | Nuclear | Chemical Shift (ppm) | NOE | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | HMBC | ||||
| Deacetylted | A | 4-α-GalAp | 1H | 5.18 | 3.9 | 4.08 | 4.44 | 4.75 | - | B-H3 |
| 13C | 99 | 71 | 71.3 | 82.4 | 73.7 | 176.2 | - | |||
| B | 3-α-Rhap | 1H | 4.99 | 4.19 | 3.93 | 3.56 | 3.98 | 1.27 | C-H3 | |
| 13C | 99.3 | 70.4 | 79 | 73.4 | 71.7 | 19.6 | C-C3 | |||
| C | 3-α-Manp | 1H | 4.95 | 4.05 | 3.87 | 3.77 | 4.02 | 3.83/3.79 | A-H4 | |
| 13C | 104 | 69.8 | 78.2 | 67.7 | 75.9 | 63.8 | A-C4 | |||
| Native EPS | A’ | 3-OAc-4-α-GalAp | 1H | 5.09 | 3.98 | 5.07 | 4.61 | 4.88 | - | |
| 13C | 98.5 | 71.9 | 73.5 | 81.7 | 74.7 | 176.2 | ||||
Carbon chemical shifts in italics; glycosylated, downfield carbon resonances in bold.