Table 1.
The NMR spectroscopic data of compounds 1 and 2 (MeOH-d4, 1H-NMR 600 MHz, 13C-NMR 150 MHz).
| Position | 1 | 2 | ||
|---|---|---|---|---|
| δH (J in Hz) | δ C | δH (J in Hz) | δ C | |
| 1 | - | 206.1 | - | 209.7 |
| 2 | - | 53.4 | - | 57.0 |
| 3 | 4.80 (s) | 77.1 | 4.84 (s) | 77.4 |
| 4 | 7.80 (s) | 132.4 | 7.35 (s) | 126.9 |
| 5 | - | 144.4 | - | 146.6 |
| 6 | - | 144.1 | - | 140.4 |
| 7 | - | 123.9 | - | 138.2 |
| 8 | - | 134.0 | - | 133.1 |
| 9 | - | 155.1 | - | 155.6 |
| 10 | 1.10 (s) | 20.0 | 3.73 (d, J = 11.0) | 67.1 |
| 3.68 (d, J = 11.0) | ||||
| 11 | 1.25 (s) | 22.6 | 1.15 (s) | 19.2 |
| 12 | 2.49 (s) | 20.3 | 2.58 (s) | 22.4 |
| 13 | 3.06 (m) | 27.0 | 5.32 (dd, J = 4.9, 8.3) | 72.7 |
| 14 | 4.49 (m) | 67.9 | 3.93 (dd, J = 8.3, 11.4) | 65.6 |
| 4.55 (m) | 3.64 (dd, J = 4.9, 11.4) | |||
| 15 | - | 163.8 | 2.76 (s) | 15.2 |