Table 1.
1H NMR (600 MHz in DMSO-d6) and 13C NMR data (150 MHz in DMSO-d6) of 1a/1b–3a/3b (ov: overlap signals).
| No. | 1a/1b | 2a/2b | 3a/3b | |||
|---|---|---|---|---|---|---|
| δH (J in Hz) | δ C | δH (J in Hz) | δ C | δH (J in Hz) | δ C | |
| 1 | 11.39, brs | 12.39, brs | ||||
| 2 | 8.56, s | 148.3 | 150.8 | 179.9 | ||
| 3 | 133.4 | 2.43, 2H, ov | 47.9 | |||
| 4 | 132.1 | 162.6 | 71.8 | |||
| 4a | 124.6 | 114.3 | 131.7 | |||
| 5 | 9.29, d (8.6) | 126.7 | 7.93, d (8.0) | 127.9 | 7.27, d (7.3) | 123.7 |
| 6 | 7.77, dd (8.6, 7.7) | 128.9 | 7.22, dd (8.0, 7.7) | 122.9 | 6.87, dd (7.5, 7.3) | 121.9 |
| 7 | 7.84, dd (8.3, 7.7) | 130.4 | 7.76, dd (8.2, 7.7) | 135.4 | 7.17, dd (7.7, 7.5) | 128.5 |
| 8 | 8.07, d (8.3) | 129.8 | 7.16, d (8.2) | 115.5 | 6.76, d (7.7) | 109.4 |
| 8a | 148.5 | 139.9 | 141.3 | |||
| 9 | 161.6 | 174.2 | ||||
| 1′ | 11.25, brs | 3.84, dd (12.6, 5.0) | 45.6 | 10.37, brs | ||
| 4.01, dd (12.6, 5.0) | ||||||
| 2′ | 176.8 | 4.34, dd (12.6, 6.5) | 69.2 | 3.33, m | 46.9 | |
| 3′ | 55.4 | 5.83, ddd (16.9, 10.7, 6.5) | 140.0 | 3.82, dd (7.7, 1.4) | 68.5 | |
| 3′a | 128.2 | |||||
| 4′ | 6.76, d (7.5) | 124.4 | 5.01, dd (10.7, 1.2) | 115.5 | 1.71, m | 31.8 |
| 5.11, dd (16.9, 1.2) | 1.90, m | |||||
| 5′ | 6.95, dd (7.7, 7.5) | 123.1 | 1.73, m; 1.99, m | 28.4 | ||
| 6′ | 7.30, dd (7.8, 7.7) | 130.1 | 2.28, dd (12.5, 6.2) | 43.3 | ||
| 2.43, ov | ||||||
| 7′ | 7.05, d (7.8) | 111.2 | ||||
| 7′a | 141.9 | |||||
| 2′’ | 4.44, dd (9.1, 2.6) | 61.8 | ||||
| 3′’ | 1.11, m; 1.97, m | 27.1 | ||||
| 4′’ | 1.94, 2H, m | 22.8 | ||||
| 5′’ | 3.48, ov; 3.81, m | 46.6 | ||||
| 2′-OH | 5.12, d (5.2) | |||||