Table 2.
13C NMR spectroscopic data of compounds 1–5.
| No. | 1 a | 2 b | 3 a | 4 b | 5 b |
|---|---|---|---|---|---|
| 1 | 71.7 (qC) c | 161.1 (qC) c | 148.8 (qC) c | 149.3 (qC) c | 148.2 (qC) c |
| 2 | 107.1 (qC) | 78.7 (CH) | 123.7 (CH) | 118.5 (CH) | 118.3 (CH) |
| 3 | 121.9 (CH) | 119.3 (CH) | 60.8 (CH) | 126.1 (CH) | 121.7 (CH) |
| 4 | 144.2 (qC) | 146.9 (qC) | 61.4 (qC) | 130.5 (qC) | 133.7 (qC) |
| 5 | 38.6 (CH2) | 36.8 (CH2) | 36.7 (CH2) | 29.7 (CH2) | 35.7 (CH2) |
| 6 | 25.2 (CH2) | 24.1 (CH2) | 25.3 (CH2) | 81.0 (CH) | 24.9 (CH2) |
| 7 | 61.0 (CH) | 60.9 (CH) | 61.3 (CH) | 148.0 (CH) | 61.8 (CH) |
| 8 | 60.2 (qC) | 60.6 (qC) | 60.9 (qC) | 132.8 (qC) | 62.9 (qC) |
| 9 | 39.2 (CH2) | 37.6 (CH2) | 40.1 (CH2) | 25.9 (CH2) | 32.2 (CH2) |
| 10 | 25.8 (CH2) | 26.6 (CH2) | 26.9 (CH2) | 26.2 (CH2) | 39.1 (CH2) |
| 11 | 141.4 (CH) | 142.7 (CH) | 141.3 (CH) | 125.9 (CH) | 125.6 (CH) |
| 12 | 133.8 (qC) | 130.7 (qC) | 133.1 (qC) | 133.8 (qC) | 135.9 (qC) |
| 13 | 23.2 (CH2) | 24.7 (CH2) | 28.2 (CH2) | 38.2 (CH2) | 22.0 (CH2) |
| 14 | 24.2 (CH2) | 25.9 (CH2) | 27.6 (CH2) | 27.6 (CH2) | 28.4 (CH2) |
| 15 | 64.6 (qC) | 124.5 (qC) | 77.8 (qC) | 33.0 (CH) | 34.7 (CH) |
| 16 | 68.9 (CH2) | 174.6 (qC) | 25.4 (CH3) | 23.4 (CH3) | 22.4 (CH3) |
| 17 | 11.6 (CH3) | 9.1 (CH3) | 25.5 (CH3) | 21.5 (CH3) | 22.1 (CH3) |
| 18 | 16.0 (CH3) | 15.4 (CH3) | 16.4 (CH3) | 68.5 (CH2) | 17.0 (CH3) |
| 19 | 16.1 (CH3) | 16.3 (CH3) | 15.3 (CH3) | 173.6 (qC) | 63.1 (CH2) |
| 20 | 167.4 (qC) | 167.5 (qC) | 167.4 (qC) | 16.3 (CH3) | 17.2 (CH3) |
| 2-OMe | 49.2 (CH3) | - | - | - | - |
| 15-OMe | - | - | 49.9 (CH3) | - | - |
| 20-OMe | 51.2 (CH3) | 51.9 (CH3) | 51.3 (CH3) | - | - |
a Spectra were measured in C6D6 (100 MHz); b Spectra were measured in CDCl3 (100 MHz); c Multiplicities are deduced by HSQC and DEPT experiments.