Table 2.
13C-NMR, 1H-NMR and HMBC data for 1-O-acetylcaranine (6) (500 MHz, CDCl3).
| Position | δC, Type | δH (J in Hz) | HMBC |
|---|---|---|---|
| 1 | 66.60 d | 5.84 br dd (4.5, 2.0) | C-3, C-4a, C-10b, OCOCH3 |
| 2α | 33.55 t | 2.39 m | |
| 2β | 33.55 t | 2.64 m | |
| 3 | 114.43 d | 5.39 dd (4.9, 2.4) | C-4a, C-1 |
| 4 | 139.56 s | ||
| 4a | 61.51 d | 2.82 d (10.8) | |
| 6α | 57.09 t | 3.54 d (14.3) | C-10a |
| 6β | 57.09 t | 4.13 d (14.1) | C-4a, C-7, C-10a |
| 6a | 129.54 s | ||
| 7 | 107.34 d | 6.57 br s | C-6, C-9, C10a |
| 8 | 146.24 s | ||
| 9 | 146.49 s | ||
| 10 | 105.25 d | 6.72 d (1.0) | C-6a, C-8, C-10b |
| 10a | 127.79 s | ||
| 10b | 43.56 d | 2.67 m | |
| 11α | 28.70 t | 2.61 m | |
| 11β | 28.70 t | 2.61 m | |
| 12α | 53.83 t | 2.39 m | C-6 |
| 12β | 53.83 t | 3.33 ddd (9.4, 4.9, 4.4) | C-4, C-4a, C-6 |
| OCH2O | 101.16 t | 5.91 d (1.5)–5.92 d (1.5) | |
| OCOCH3 | 171.03 q | 1.93 s | |
| OCOCH3 | 21.53 q | 1.93 s |