Table 2.
1H and 13C NMR data (DMSO-d6, 600 and 150 MHz) of 1
| Position | δH, mult (J in Hz) | δC, type | COSY | HMBC |
|---|---|---|---|---|
| 1 | 7.95, d (7.8) | 120.6, CH | H-2 | C-3, 10 |
| 2 | 7.86, dd (7.8, 8.4) | 135.4, CH | H-1, 3 | C-4, 10a |
| 3 | 7.70, d (8.4) | 123.6, CH | H-2 | C-1, 4a |
| 4 | – | 156.8, C | – | – |
| 4a | – | 122.3, C | – | – |
| 5 | – | 181.2, C | – | – |
| 5a | – | 133.4, C | – | – |
| 6 | 7.61, d (7.8) | 118.2, CH | H-7 | C-8, 9a, 5 |
| 7 | 7.78, d (7.8) | 141.0, CH | H-6 | C-5a, 9 |
| 8 | – | 133.4, C | – | – |
| 9 | – | 160.3, C | – | – |
| 9a | – | 115.1, C | – | – |
| 10 | – | 188.9, C | – | – |
| 10a | – | 135.2, C | – | – |
| 11a 11b |
2.88, d (13.2) 3.03, d (13.2) |
40.1, CH2 | – | C-7, 9 |
| 12 | – | 71.5, C | – | – |
| 13 | 2.40, s | 46.7, CH2 | – | C-11 |
| 14 | – | 172.8, C | – | – |
| 15 | 1.19, s | 26.8, CH3 | – | C-11, 13 |
| 1′ | 5.64, d (1.8) | 99.3, CH | H-2′ | C-4′, 5′ |
| 2′ | 3.99, m | 70.5, CH | H-1′ | C-1′ |
| 3′ | 3.99, m | 70.5, CH | H-4′ | – |
| 4′ | 3.33, m | 72.0, CH | H-3′ | – |
| 5′ | 3.52, m | 70.4, CH | H-4′, 6′ | – |
| 6′ | 1.09, d (6) | 18.4, CH3 | H-5′ | C-5′, 4′ |