Table 2.
13C NMR (100 MHz) and 1H NMR (400 MHz) data of 3 and 4 (DMSO-d6).
| Position | 3 | 4 | ||
|---|---|---|---|---|
| δC, mult. | δH (J in Hz) | δC | δH (J in Hz) | |
| 1 | 155.5, CH | 8.32 s | 69.8, CH2 | 3.96 d (12.4); 4.68 d (12.4) |
| 3 | 153.3, qC | 156.7, qC | ||
| 4 | 116.2, CH | 7.14 s | 109.1, CH | 6.46 s |
| 4a | 142.4, qC | 148.1, qC | ||
| 5 | 109.2, CH | 5.73 s | 120.2, CH | 6.21 s |
| 6 | 192.2, qC | 192.2, qC | ||
| 7 | 85.5, qC | 84.1, qC | ||
| 7-CH3 | 22.3, CH3 | 1.56 s | 23.9, CH2 | 1.82 s |
| 8 | 192.6, qC | 200.0, qC | ||
| 8a | 114.7, qC | 66.2, qC | ||
| 1′ | 134.0, CH | 7.28 d (15.7) | 136.7, CH | 7.13 d (15.6) |
| 2′ | 125.0, CH | 6.43 d (15.7) | 124.2, CH | 6.34 d (15.6) |
| 3′ | 166.6, qC | 167.0, qC | ||
| 1″ | 168.7, qC | 168.2, qC | ||
| 2″ | 105.0, qC | 105.1, qC | ||
| 3″ | 155.2, qC | 163.1, qC | ||
| 4″ | 101.0, CH | 6.24 s | 101.0, CH | 6.16 d (2.0) |
| 5″ | 152.2, qC | 162.8, qC | ||
| 6″ | 137.3, qC | 111.6, CH | 6.24 d (2.0) | |
| 7″ | 126.2, qC | 142.8, qC | ||
| 7″-CH3 | 14.6, CH2 | 2.36 s | 23.1, CH2 | 2.44 s |
| 8a-OH | 7.26 s | |||
| 3′-OH | 12.86 brs | 12.82 brs | ||
| 3″-OH | 9.68 s | 10.26 s | ||
| 5″-OH | 10.28 brs | 10.32 brs | ||
| 6″-OH | 8.00 brs | |||