Table 2 13C NMR (125 MHz, CDCl3), δC in ppm
| Â | Compound 1 | Compound 2 | Compound 3 |
|---|---|---|---|
Carbon No | 13C–NMR (δC ppm) | 13C–NMR (δC ppm) | 13C–NMR (δC ppm) |
1 | 123.9 | 123.2 | 125.3 |
2 | 138.1 | 140.4 | 140.7 |
3 | 132.3 | 130.7 | 122.6 |
4 | 140.1 | 138.8 | 134.7 |
5 | 139.6 | 137.7 | 138.4 |
6 | 119.7 | 120.1 | 120.1 |
7 | 133.4 | 125.4 | 128.1 |
8 | 129.7 | 144.7 | 146.7 |
9 | 158.5 | 160.1 | 159.6 |
10 | 143.2 | 141.4 | 142.1 |
11 | 32.9 | 32.4 | 32.1 |
12 | 27.6 | 28.3 | 25.4 |
13 | 27.6 | 28.3 | 25.4 |
14 | 179.8 | 180.7 | 175.1 |
15 | 62.4 | 174.1 | 172.6 |
16 | – | 23.4 | 22.7 |
9-OCH3 | 58.7 | 60.4 | 59.6 |
14-OCH3 | – | – | 57.6 |