Table 2.
NMR Spectroscopic Data of Ammonificin B (2) (400 MHz, DMSO-d6)
| position | δC | δH | HMBCa |
|---|---|---|---|
| 2 | 70.2, CH2 | 4.45, m | 8a, 4 |
| 3 | 83.3, CH | 4.98, m | 17 |
| 4 | 27.5, CH | 4.35, d (5.6) | 4a, 12, 16 |
| 4a | 116.1, qC | ||
| 5 | 155.7, qC | ||
| 6 | 108.0, CH | 6.67, d (7.9) | 4a, 5, 7, 8a |
| 7 | 126.8, CH | 7.09, d (7.9) | 5, 8, 8a |
| 8 | 119.7, qC | ||
| 8a | 157.9, qC | ||
| 9 | 69.6, CH | 4.70, m | 7, 8 |
| 10 | 49.2, CH2 | 3.45, m | 8, 9 |
| 11 | 144.2, qC | ||
| 12 | 133.9, CH | 7.30, s | 11, 13, 14, 16 |
| 13 | 126.9, qC | ||
| 14 | 123.9, qC | ||
| 15 | 132.5, CH | 7.32, d (7.2) | 11, 13, 14, 16 |
| 16 | 129.6, CH | 7.28, d (7.2) | 11, 12, 14, 15 |
| 17 | 158.9, qC | ||
| 18 | 101.4, CH | 6.65, s | 17, 19, 20, 22 |
| 19 | 156.9, qC | ||
| 20 | 107.3, CH | 6.74, d (7.8) | 18, 19, 21, 22 |
| 21 | 130.5, CH | 7.01, dd (7.6,7.8) | 17, 19, 20, 22 |
| 22 | 106.8, CH | 6.81, d (7.6) | 17, 18, 20, 21 |
| OH on C-5 | 9.26, br s | ||
| OH on C-19 | 9.47, br s |
a
HMBC correlations, optimized for 8 Hz, are from proton(s) stated to the indicated carbon.