Table 2.
NMR (CD3OD) data of compound 3 compared with literature data.
| C | ppm | * | DEPT | H-H COSY | HSQC | HMBC |
| 2 | 159.0 | 158.3 | Cq | - | - | |
| 3 | 135.6 | 135.6 | Cq | - | - | |
| 4 | 179.5 | 178.7 | Cq | - | - | - |
| 5 | 163.1 | 162.3 | Cq | - | - | |
| 6 | 99.9 | 98.8 | CH | 6.20 (d, J = 2.4Hz)/6.39 | 6.20/99.9 | 94.7, 105.7 |
| (d, J=1.8Hz) | ||||||
| 7 | 166.0 | 163.7 | Cq | - | - | |
| 8 | 94.7 | 94.0 | CH | 6.39. (d, J=1.8Hz)/ 6.20 | 6.39/94.7 | 99.9, 105.7 |
| (d, J= 2.4Hz) | ||||||
| 9 | 158.4 | 157.4 | Cq | - | - | - |
| 10 | 105.7 | 104.5 | Cq | - | - | - |
| 1′ | 123.2 | 122.4 | Cq | - | - | |
| 2′ | 116.0 | 116.6 | CH | 7.58 (dd, 8.4, 2.4 Hz)/ | 7.584/117.6 | 117.6, 159.0, |
| 6.87ortho 7.71 (d, 2.4Hz) meta | 149.9 | |||||
| 3′ | 149.9 | 149.1 | CH | 6.87 (d, 8.4 Hz)/7.58-ortho | 6.87/116.0 | 123.2,145.9, |
| 4′ | 145.9 | 148.2 | Cq | - | - | - |
| 5′ | 117.6 | 116.0 | Cq | - | - | - |
| 6′ | 123.0 | 123.5 | CH | 7.71 (d, 2.4 Hz)/ 7.58 meta | 7.71/117.6 | 159.0, 123.0, |
| 145.9 | ||||||
| 1″ | 104.3 | 102.1 | CH | 5.26 (d, 7.8 Hz)/3.43 | 5.26/104.3 | 135.6, 78.4 |
| 2′ | 75.7 | 70.5 | 3.43 (triplet) | 3.49/75.7 | 104.3 | |
| 3′ | 78.1 | 71.9 | 3.35 (triplet) | 3.43/78.1 | ||
| 4′ | 78.4 | 71.3 | CH | 3.49 (triplet) | 3.23/78.4 | |
| 5′ | 71.2 | 69.7 | 3.23 (multiplet) | 3.35/71.2 | ||
| 6′ | 19.5 | 17.8 | CH3 | 0.99 (d, J=6.6 Hz) | 0.992/19.5 | 71.2 |