Table 1.
1H- and 13C-NMR Spectral Data of compounds 1, 2 and 4 [(300/75 MHz, in methanol-d4, TMS, δ (ppm) (J = Hz)].
| Position | 1 | 2 | 4 | |||
|---|---|---|---|---|---|---|
| δH | δC | δH | δC | δH | δC | |
| 2 | 156.4 | 156.6 | 146.7 | |||
| 3 | 134.0 | 134.0 | 135.6 | |||
| 4 | 177.6 | 177.4 | 175.8 | |||
| 4a | 104.6 | 104.7 | 103.3 | |||
| 5 | 161.7 | 161.7 | 161.1 | |||
| 6 | 6.14 (d 2.1) | 98.5 | 6.13 (d 2.1) | 98.5 | 6.17 (d 2.1) | 98.1 |
| 7 | 164.5 | 164.4 | 164.2 | |||
| 8 | 6.31 (d 2.1) | 93.3 | 6.30 (d 2.1) | 93.3 | 6.36 (d 2.1) | 93.2 |
| 8a | 156.6 | 156.8 | 156.8 | |||
| 1' | 120.6 | 120.8 | 121.8 | |||
| 2' | 7.27 (s) | 108.6 | 7.25 (s) | 108.6 | 7.32 (s) | 107.3 |
| 3' | 144.9 | 144.9 | 145.4 | |||
| 4' | 136.6 | 136.6 | 136.1 | |||
| 5' | 144.9 | 144.9 | 145.4 | |||
| 6' | 7.27 (s) | 108.6 | 7.25 (s) | 108.6 | 7.32 (s) | 107.3 |
| 1'' | 5.94 (d 8.1) | 100.1 | 5.77 (d 7.8) | 100.2 | ||
| 2'' | 5.81 (dd 10.2, 8.1) | 74.8 | 5.43 (dd 9.9, 7.8) | 73.5 | ||
| 3'' | 5.18 (dd 10.2, 3.0) | 70.7 | 3.84 (dd 9.9, 3.6) | 72.4 | ||
| 4'' | 4.28 (d 3.0) | 66.9 | 3.95 (d 3.6) | 69.5 | ||
| 5'' | 3.75 (m) | 76.3 | 3.61 (m) | 76.4 | ||
| 6'' | 3.71, 3.69 (m) | 60.8 | 3.71, 3.69 (m) | 61.0 | ||
| 1''' | 119.1, 118.7 | 120.4 | ||||
| 2''',6''' | 7.03, 7.02 (s) | 109.4, 109.3 | 7.12 (s) | 109.5 | ||
| 3''',5''' | 145.1 | 145.0 | ||||
| 4''' | 138.8, 138.7 | 138.5 | ||||
| C=O | 166.4, 166.2 | 166.7 | ||||