Table 2.
1H NMR (400 MHz) and 13C NMR (100 MHz) data of cichorins E (2) and F (3) in CDCl3.
| Compound 2 | Compound 3 | |||
|---|---|---|---|---|
| No | 1H NMR | 13C NMR | 1H NMR | 13C NMR |
| 1 | – | 151.3 | 161.7 | |
| 2 | 7.06 (s, 1H) | 103.2 | 6.76 (d, J = 2.0 Hz, 1H) | 105.0 |
| 3 | – | 129.0 | 163.8 | |
| 4 | – | 152.0 | 7.34 (d, J = 2.0 Hz, 1H) | 101.9 |
| 4a | – | 120.1 | 136.6 | |
| 5 | – | 156.8 | 7.81 (s, 1H) | 123.7 |
| 6 | 6.98 (dd, J = 1.5, 8.0 Hz, 1H) | 107.3 | 143.7 | |
| 7 | 7.51 (t, J = 8.0 Hz, 1H) | 128.0 | 139.6 | |
| 8 | 7.89 (dd, J = 1.5, 8.0 Hz, 1H) | 114.8 | 158.1 | |
| 8a | – | 131.1 | 131.5 | |
| 9 | – | – | 181.8 | |
| 9a | – | – | 118.1 | |
| 10 | – | – | 183.8 | |
| 10a | – | – | 125.6 | |
| 1-OMe | 3.99 (s, 3H) | 55.7 | 3.97 (s, 3H) | 56.5 |
| 3-OMe | – | – | 3.95 (s, 3H) | 55.8 |
| 4-OMe | 3.82 (s, 3H) | 63.8 | ||
| 5-Ome | 4.04 (s, 3H) | 56.1 | ||
| 8-OMe | – | – | 3.92 (s, 3H) | 61.5 |
| 6-Me | – | – | 2.39 (s, 3H) | 20.7 |
| 7-Me | – | – | 2.31 (s, 3H) | 12.1 |
| COMe | 2.78 (s, 3H) | 31.4 | ||
| COMe | – | 201.2 |