Table 2.
1H NMR spectroscopic data for pterocarpadiol A (1) and pterocarpadiol C (3) in DMSO-d 6 (δ H 2.49 ppm)
| No. | 1 | 3 |
|---|---|---|
| 1 | 6.79 (d, 10.0) | 2.43 (td, 14.1, 4.5, Hβ) 1.93 (ddd, 14.1, 4.9, 2.8, Hα) |
| 2 | 6.02 (dd, 10.0, 1.3) | 2.65 (ddd, 16.0, 14.1, 4.9, Hα) 2.16 (ddd, 16.0, 4.5, 2.8, Hβ) |
| 4 | 5.32 (d, 1.3) | 5.22 (s) |
| 6 | 4.79 (d, 10.1, Hα) 4.36 (d, 10.1, Hβ) |
4.49 (d, 10.0, Hα) 4.28 (d, 10.0, Hβ) |
| 7 | 6.93 (s) | 6.93 (s) |
| 10 | 6.44 (s) | 6.49 (s) |
| 11a | 4.68 (s) | 4.44 (s) |
| OCH2O | 5.94 (s) 5.93 (s) |
5.96 (s) 5.94 (s) |
| OH-6a | 6.40 (s) | 6.31 (s) |
| OH-11b | 6.77 (s) | 6.27 (s) |