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1H-NMR (500 MHz, CDCl3) and 13C-NMR (125 MHz, CDCl3) data for Z-4-2.
| Position | 1H-NMR | 13C-NMR | HMBC |
|---|---|---|---|
| 1 | 164.8 | ||
| 2 | 160.8 | ||
| 3 | 6.16 (1H, s) | 105.2 | C-1 |
| 4 | 182.6 | ||
| 5 | 124.9 | ||
| 6 | 8.10 (1H, d, J = 8.5 Hz) | 131.4 | C-4 |
| 7 | 7.24 (1H, t, J = 8.5 Hz) | 124.2 | |
| 8 | 7.59 (1H, t, J = 8.5 Hz) | 134.9 | |
| 9 | 7.20 (1H, d, J = 8.5 Hz,) | 119.9 | |
| 10 | 136.9 | ||
| 11 | 3.89 (3H, s) | 56.6 | C-2 |
