Table 1.
1H- and 13C-NMR spectral data of compound 1 (recorded at 400/100 MHz in DMSO-d6; δ in ppm, J in Hz) a.
| NO. | δH (J, Hz ) a | δc | NO. | δH (J, Hz ) a | δc |
|---|---|---|---|---|---|
| 2 | 164.0 | 2′′ | 5.51 (1H, dd, J = 13.1, 2.8 Hz) | 78.0 | |
| 3 | 6.76 (1H, s) | 102.7 | 3′′ | 3.31 (1H, dd, J = 17.1, 13.1 Hz) 2.60 (1H, dd, J = 17.1, 2.8 Hz) |
41.2 |
| 4 | 181.9 | 4′′ | 196.2 | ||
| 5 | 161.3 | 5′′ | 160.5 | ||
| 6 | 6.22(1H, d, J = 2.0 Hz) | 98.8 | 6′′ | 6.05 (1H, s) | 95.4 |
| 7 | 164.1 | 7′′ | 164.2 | ||
| 8 | 6.54 (1H, d, J = 2.0 Hz) | 94.0 | 8′′ | 104.6 | |
| 9 | 157.3 | 9′′ | 162.0 | ||
| 10 | 103.8 | 10′′ | 101.1 | ||
| 1′ | 122.0 | 1′′′ | 129.6 | ||
| 2′ | 7.90 (1H, d, J = 2.2 Hz) | 131.1 | 2′′′/6′′′ | 7.15 (2H, d, J = 8.7 Hz) | 127.5 |
| 3′ | 122.5 | 4′′′(-OH) | 9.51 (1H, br s) | 157.1 | |
| 4′ | 161.3 | 3′′′/5′′′ | 6.60 (2H, d, J = 8.7 Hz) | 114.6 | |
| 5′ | 7.15 (1H, d, J = 8.7 Hz) | 111.2 | |||
| 6′ | 7.96 (1H, dd, J = 8.7, 2.2 Hz) | 127.3 | |||
| OMe-4′ | 3.72 (3H, s) | 55.6 |
a br s, broad singlet; d, doublet; dd, double doublet; s, singlet.