1H (600 MHz, CDCl3) and 13C (150 MHz, CDCl3) NMR data for compounds 8–10.
| Position | 8 | 9 | 10 | |||
|---|---|---|---|---|---|---|
| δ H (J in Hz) | δ C | δ H (J in Hz) | δ C | δ H (J in Hz) | δ C | |
| 2 | 8.09, s | 156.2 | 8.15, s | 156.2 | 8.17, s | 156.6 |
| 3 | 123.6 | 123.7 | 123.6 | |||
| 4 | 182.7 | 182.8 | 183.0 | |||
| 4a | 104.0 | 107.6 | 107.9 | |||
| 5 | 166.0 | 160.2 | 158.4 | |||
| 6 | 106.7 | 115.6 | 118.3 | |||
| 7 | 166.2 | 164.6 | 163.7 | |||
| 8 | 103.7 | 112.5 | 110.0 | |||
| 8a | 159.2 | 153.5 | 154.9 | |||
| 6-CHO | 10.42, s | 193.0 | ||||
| 6-CH2OH | 4.84, s | 62.6 | ||||
| 6-CH3 | 2.26, s | 8.7 | ||||
| 7-OCH3 | 3.95, s | 54.2 | 3.92, s | 55.0 | ||
| 8-CH2OH | 4.93, s | 62.5 | ||||
| 8-CH3 | 2.23, s | 6.7 | 2.34, s | 8.5 | ||
| 1′ | 119.2 | 119.8 | 119.7 | |||
| 2′ | 155.9 | 156.1 | 155.9 | |||
| 3′ | 7.11, dd (7.8, 1.2) | 119.8 | 7.11, dd (7.8, 1.2) | 119.8 | 7.11, dd (7.8, 1.2) | 119.8 |
| 4′ | 7.39, ddd (7.8, 7.8, 1.8) | 131.3 | 7.38, ddd (7.8, 7.8, 1.8) | 131.0 | 7.38, ddd (7.8, 7.8, 1.8) | 131.0 |
| 5′ | 7.03, ddd (7.8, 7.8, 1.2) | 121.6 | 7.02, ddd (7.8, 7.8, 1.2) | 121.5 | 7.02, ddd (7.8, 7.8, 1.2) | 121.5 |
| 6′ | 7.19, dd (7.8, 1.8) | 130.0 | 7.17, dd (7.8, 1.8) | 130.1 | 7.18, dd (7.8, 1.8) | 130.0 |
| 5-OH | 12.62, s | 12.58, s | ||||