Table 1.
NMR spectroscopic data of compound 1.
| No | δH (Mult., J in Hz) | δC | HMBC |
|---|---|---|---|
| 1a | - | 131.03 | |
| 2a/6a | 6.91 (d, 8) | 127.39 | C-4a, C-6a/2a, C-7a |
| 3a/5a | 6.62 (d, 8.8) | 114.83 | C-1a, C-4a, C-5a/3a |
| 4a | - | 157.17 | |
| 7a | 6.04 (s) | 85.57 | C-2a/6a, C-9a, C-11b |
| 8a | 3.88 (s) | 45.41 | C-1a, C-7a, C-9a, C-10a/14a, C-9b, c-10b, c-11b |
| 9a | - | 140.47 | |
| 10a | - | 117.97 | C-8a, C-14a/10a, C-11a/13a, c-12a |
| 14a | 5.79 (d, 1.6) | 107.70 | |
| 11a | - | 160.69 | |
| 13a | - | 158.60 | |
| 12a | 6.13 (d, 2) | 97.14 | C-10a/14a, C-11a/13a |
| 1b | - | 131.28 | |
| 2b/6b | 7.07 (d, 8.8) | 127.82 | C-4b, C-6b/2b, C-7b |
| 3b/5b | 6.67 (d, 8.4) | 115.24 | C-1b, C-4b, C-5b/3b |
| 4b | - | 157.55 | |
| 7b | 5.83 (d, 9.2) | 89.22 | C-2b/6b, C-9b |
| 8b | 4.56 (d, 9.2) | 52.18 | C-1b,C-7b, C-9b, C-10b, C-14b, C-8b, C-10b, C-12b |
| 9b | - | 138.94 | |
| 10b | - | 119.92 | |
| 11b | - | 159.84 | |
| 12b | 6.18 (d, 2) | 95.70 | |
| 13b | - | 158.67 | |
| 14b | 6.62 (overlap) | 105.35 | C-8b, C-10b, C-12b |
| 1c | - | 131.64 | |
| 2c/6c | 6.69 | 128.81 | |
| 3c/5c | 6.64 | 115.24 | |
| 4c | - | 157.70 | |
| 7c | 4.63 (d, 7.2) | 94.83 | |
| 8c | 4.42 (d, 7.2) | 54.83 | |
| 9c | - | 137.84 | |
| 10c | - | 118.77 | |
| 11c | - | 160.96 | |
| 12c | 6.19 (d, 2) | 96.03 | |
| 13c | - | 160.20 | |
| 14c | 6.42 (d, 2) | 104.90 |