Table 2.
1H (400 MHz) and 13C (100 MHz) NMR spectroscopic data for deoxyenhygrolides A (2) and B (3) in C6D6.
| Deoxyenhygrolide A (2) | Deoxyenhygrolode B (3) | |||||
|---|---|---|---|---|---|---|
| Position | δC, Type | δH (J in Hz) | HMBC a | δC, Type | δH (J in Hz) | HMBC a |
| 1 | 169.8, C | 169.3, C | ||||
| 2 | 127.5, C | 132.5, C | ||||
| 3 | 152.0, C | 149.6, C | ||||
| 4 | 149.2, C | 150.2, C | ||||
| 5 | 109.0, CH | 5.70, s | 3, 4, 6, 7, 11 | 113.8, CH | 6.58, s | 3, 4, 6, 7, 11 |
| 6 | 133.8, C | 133.7, C | ||||
| 7, 11 | 130.7, CH | 7.74, d (7.5) | 129.5, CH | 6.82, m | ||
| 8, 10 | 129.0, CH | 7.12, t (7.5) | 128.3, CH | 6.96, m | ||
| 9 | 128.7, CH | 7.01, t (7.5) | 128.0, CH | 6.96, m | ||
| 12 | 30.1, CH2 | 3.51, s | 1, 2, 3, 13, 14, 18 | 30.2, CH2 | 3.56, s | 1, 2, 3, 13, 14, 18 |
| 13 | 138.4, C | 138.4, C | ||||
| 14, 18 | 128.9, CH | 7.18, d (7.5) | 128.9, CH | 7.25, d (7.5) | ||
| 15, 17 | 128.9, CH | 7.10, t (7.5) | 128.9, CH | 7.12, t (7.2) | ||
| 16 | 126.8, CH | 7.02, t (7.5) | 126.9, CH | 7.02, t (7.4) | ||
| 19 | 33.6, CH2 | 1.92, d (7.4) | 2, 3, 4 | 34.8, CH2 | 2.00, d (7.1) | 2, 3, 4 |
| 20 | 29.1, CH | 1.55, non (6.6) | 3 | 28.3, CH | 1.07, non (6.8) | 3 |
| 21, 22 | 22.6, CH3 | 0.62, d (6.6) | 22.0, CH3 | 0.33, d (6.6) | ||
a HMBC correlations are from proton(s) started to the indicated carbon.