Table 3.
NMR spectroscopy data (MeOD-d4) for compound 3.
| Pos. | δH (mult., J = Hz) | δc | 1H-1H COSY | HMBC |
|---|---|---|---|---|
| 2 | 174.8s | |||
| 3 | 6.67 (s) | 109.8d | C-14, C-4a, C-2 | |
| 4 | 182.6s | |||
| 4a | 121.0s | |||
| 5 | 138.3s | |||
| 6 | 7.58 (s) | 130.4d | C-13, C-4a, C-7, C-12a | |
| 6a | 143.0s | |||
| 7 | 7.54 (s) | 117.6d | C-8, C-11a, C-6, C-6a | |
| 7a | 148.4s | |||
| 8 | 5.00 (dd, 8.7, 4.0) | 69.4d | H-9 | C-7, C-7a |
| 9 | 2.21, 2.40 (m) | 33.1t | H-8, H-10 | |
| 10 | 2.87, 3.04 (m) | 37.1t | H-9 | C-8, C-9 |
| 11 | 207.2s | |||
| 11a | 113.8s | |||
| 12 | 166.2s | |||
| 12a | 115.1s | |||
| 12b | 159.7s | |||
| 13 | 4.28 (m) | 43.3t | C-13-COOH, C-4a, C-6, C-5 | |
| 13-COOH | 176.1s | |||
| 14 | 74.8s | |||
| 15 | 1.82 (s) | 28.2q | C-17, C-2, C-14 | |
| 16 | 6.25 (dd, 15.5, 1.3) | 133.9d | H-17 | C-14, C-18 |
| 17 | 6.05 (dd, 15.5, 5.8) | 136.3d | H-16, H-18 | C-14, C-18 |
| 18 | 4.32 (m) | 69.5d | H-17, H-19 | C-16 |
| 19 | 1.26 (t, 6.9, 1.8) | 24.4q | H-18 | C-17, C-18 |