Table 3.
1H and 13C NMR spectroscopic data of silvaticusin D (4) (δ in ppm)
| No | δH (mult., J in Hz) | δC, type | No | δH (mult., J in Hz) | δC, type |
|---|---|---|---|---|---|
| 1 | 5.65, m | 78.5, CH | 2′a | 2.13, m | 27.2, CH2 |
| 2a | 1.83, m | 23.7, CH2 | 2′b | 2.27, (12.9) | – |
| 2b | 2.04, s | – | 3′ | 5.01, overlap | 77.3, CH |
| 3a | 1.30, m | 37.1, CH2 | 4′ | – | 34.5, C |
| 3b | 1.46, m | – | 5′ | 2.42, d, (3.3) | 51.2, CH |
| 4 | – | 31.3, C | 6′ | 5.78, d, (3.3) | 101.8, CH |
| 5 | 2.71, d, (3.1) | 55.6, CH | 7′ | – | 172.0, C |
| 6 | 5.77, d, (3.1) | 101.8, CH | 8′ | – | 58.0, C |
| 7 | – | 172.4, C | 9′ | 2.84, m | 47.6, CH |
| 8 | – | 57.8, C | 10′ | – | 49.7, C |
| 9 | 2.80, d, 3.7 | 49.7, CH | 11′a | 2.11, m | 19.1, CH2 |
| 10 | – | 49.6, C | 11′b | 1.56, m | |
| 11 | 5.00, m | 65.1, CH2 | 12′a | 1.36, m | 21.6, CH2 |
| 12a | 1.75, m | 33.3, CH2 | 12′b | 1.37, m | |
| 12b | 2.09, m | – | 13′ | 3.12, d, (11.1) | 33.9, CH |
| 13 | 3.32, m | 34.2, CH | 14′a | 2.47, d, (13.3) | 32.2, CH2 |
| 14a | 2.55, m | 33.4, C | 14′b | 2.50, d, (13.3) | |
| 14b | 3.80, m | – | 15′ | – | 216.5, C |
| 15 | – | 216.8, C | 16′ | – | 63.2, C |
| 16 | – | 63.3, C | 17′a | 1.91, m | 23.9, CH2 |
| 17a | 2.20, m | 24.3, CH2 | 17′b | 2.21, s | |
| 17b | 1.89, m | – | 18′ | 1.02, s | 27.3, CH3 |
| 18 | 0.98, s | 23.1, CH3 | 19′ | 0.99, s | 22.5, CH3 |
| 19 | 0.96, s | 32.9, CH3 | 20′a | 4.46, d, (9.0) | 74.3, CH2 |
| 20a | 4.27, d, (9.0) | 73.9, CH2 | 20′b | 4.25, d, (9.0) | |
| 20b | 4.52, d, (9.0) | – | 3′-OAc | – | 169.8, C |
| 1′ | 4.88, m | 72.9, CH | 2.23, s | 20.6, CH3 |
Recorded on an 800 MHz NMR spectrometer in pyridine-d5