Table 1.
1H and 13C NMR (300/75 MHz, DMSO-d 6) of compound (1).
| Position | δ C | δ H | HMBC correlations |
|---|---|---|---|
| 9 | 166.68 | — | H-8, H-7 |
| 4 | 159.89 | — | H-3,5; H-2,6 |
| 7 | 144.95 | — | H-2,6 |
| 7 | 144.82 | 7.7 (d, J = 15.3) | — |
| 2,6 | 130.40 | 7.5 (d, J = 8.7) | H-7 |
| 1 | 125.05 | — | H-3,5; H-8 |
| 3,5 | 115.78 | 6.7 (d, J = 8.7) | — |
| 8 | 113.97 | 6.4 (d, J = 15.9) | — |
| 1′α | 92.32 | 4.91 (d, J = 3.3) | 2α, 5α |
| 1′β | 96.93 | 4.32 (d, J = 7.8) | 2β |
| 5′β | 76.44 | 3.2 (m) | 4β, H-3β |
| 3′β | 74.72 | 2.9 (t, J = 8.4) | 4β, 1β, 5β |
| 2′β | 73.60 | 3.4 (m) | — |
| 5′α | 72.91 | 3.6 (m) | H-1′α |
| 4′β | 72.19 | 3.1 (m) | — |
| 4′α | 70.66 | 3.2 (m) | — |
| 3α | 70.24 | 3.1 (t, J = 8.4) | — |
| 2′α | 69.28 | 3.8 (m) | — |
| 6′a | 63.97 | 4.4 (dd, 12.0, 1.5) | — |
| 6′b | 63.97 | 4.1 (d, J = 11.1, 6.6) | 4β |