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1H (600 MHz) and 13C (151 MHz) NMR data for compound 5 in CDCl3
| Position | δH, m(J in Hz) | δC | HMBC |
|---|---|---|---|
| 2 | 132.8 | ||
| 3 | 128.9 | ||
| 4 | 7.04, m | 111.1 | C-5, C-3, C-7 |
| 5 | 154.1 | ||
| 6 | 6.75, dd (8.7, 2.4) | 110.8 | C-7, C-5, C-7a |
| 7 | 6.98, d (8.7) | 100.4 | C-7a, C-5, C-6, C-4, C-4a |
| 4a | 104.1 | ||
| 7a | 130.2 | ||
| 8 | 3.65, s | 30.3 | C-2, C-3, C-4a |
| 9 | 172.8 | ||
| 10 | 2.28, s | 11.7 | C-2 |
| 5-OCH3 | 3.84, s | 56.0 | C-5 |
| 9-OCH3 | 3.65, s | 52.0 | C-9 |
