1H (600 MHz, CDCl3) and 13C (150 MHz, CDCl3) NMR data for compounds 5–7.
| Position | 5 | 6 | 7 | |||
|---|---|---|---|---|---|---|
| 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 | 156.0 | 8.08, s | 155.9 | 8.12, s | 154.8 |
| 3 | 123.1 | 123.0 | 125.2 | |||
| 4 | 182.5 | 182.4 | 181.3 | |||
| 4a | 104.6 | 104.5 | 104.5 | |||
| 5 | 156.5 | 156.3 | 165.4 | |||
| 6 | 105.6 | 105.9 | 109.9 | |||
| 7 | 162.4 | 162.5 | 168.2 | |||
| 8 | 103.5 | 103.4 | 102.5 | |||
| 8a | 154.9 | 154.8 | 158.2 | |||
| 9 | 4.90, s | 67.8 | 4.92, s | 65.9 | ||
| 6-CH3 | 2.16, s | 6.7 | ||||
| 8-CHO | 10.37, s | 189.8 | ||||
| 8-CH3 | 2.25, s | 7.4 | 2.24, s | 7.3 | ||
| 9-OCH3 | 3.53, s | 58.9 | ||||
| 9-OCH2CH3 | 3.70, dd (14.4, 7.2) | 67.2 | ||||
| 9-OCH2CH3 | 1.33, t (7.2) | 15.1 | ||||
| 1′ | 120.2 | 120.2 | 119.0 | |||
| 2′ | 156.2 | 156.1 | 155.9 | |||
| 3′ | 7.10, dd (7.8, 1.2) | 119.8 | 7.10, dd (7.8, 1.2) | 119.8 | 7.11, dd (7.8, 1.2) | 119.9 |
| 4′ | 7.36, ddd (7.8, 7.8, 1.8) | 130.8 | 7.36, ddd (7.8, 7.8, 1.8) | 130.8 | 7.40, ddd (7.8, 7.8, 1.8) | 131.4 |
| 5′ | 7.00, ddd (7.8, 7.8, 1.2) | 121.3 | 7.00, ddd (7.8, 7.8, 1.2) | 121.3 | 7.04, ddd (7.8, 7.8, 1.2) | 121.6 |
| 6′ | 7.18, dd (7.8, 1.8) | 129.9 | 7.17, dd (7.8, 1.8) | 129.9 | 7.19, dd (7.8, 1.8) | 130.2 |
| 5-OH | 12.59, s | 12.58, s | ||||
| 7-OH | 9.33, br s | 9.62, br s | ||||
| 2′-OH | 8.22, br s | 8.25, br s | ||||