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The NMR data and C and H assignment of compound KA.
| No. | 13C | 1H | 1H-1H COSY | HMBC |
|---|---|---|---|---|
| 1 | 165.4 | — | — | — |
| 2 | 108.1 | 6.97 (1H, s) | — | C-1, C-5, C-7 |
| 3 | 118.6 | — | — | — |
| 4 | 139.4 | — | — | — |
| 5 | 132.3 | 7.41 (1H, m) | H-6, H-8 | C-3, C-5, C-8 |
| 6 | 139.4 | 7.72 (1H, d) | H-5, H-7 | C-8, C-9 |
| 7 | 146.1 | 7.83 (1H, d) | H-6, H-8 | C-8 |
| 8 | 124.5 | 7.41 (1H, d) | H-5, H-6 | C-5, C-9, C-10 |
| 9 | 146.1 | — | — | — |
| 10 | 180.5 | — | — | — |
