Table 1.
1H (400 MHz) and 13C (100 MHz) NMR data of pannorin B (1) in (CD3)2SO.
| # | δH (mult., J) | δ C | HMBC (H→ #C) |
|---|---|---|---|
| 1* | 164.5 | ||
| 2 | 5.66 ( s) | 91.4 | 1, 3, 15 |
| 3* | 162.2 | ||
| 4 | 101.4 | ||
| 5 | 3.26 (d, 16.8) | 38.1 | 4, 6, 7 (wk), 15 (wk) |
| 3.17 (d, 16.8) | 4, 6, 7, 15 | ||
| 6 | 127.9 | ||
| 7 | 7.37 (br s) | 121.0 | 5, 8, 9, 13, 15 |
| 8 | 138.9 | ||
| 9 | 6.85 (d, 2.4) | 98.8 | 7, 10 (wk), 11, 13 |
| 10 | 160.3 | ||
| 11 | 6.61 (d, 2.4) | 101.9 | 9, 10, 12, 13 |
| 12 | 156.7 | ||
| 13 | 107.7 | ||
| 14 | 151.8 | ||
| 15 | 104.6 | ||
| 16 | 1.67 (s) | 27.2 | 4, 5 |
| 17 | 3.85 (s) | 55.3 | 10 |
| 4-OH | 7.45 (s) | 4, 5, 16 (wk) | |
| 12-OH | 10.34 (s) | 11, 12, 13 |
*
These assignments may be interchanged.