Table 1.
1H and 13C NMR (500 MHz) spectroscopic data of compounds1 and 2 (in DMSO-d6) and compound 3 (in CD3OD) (δ in ppm, J in Hz)a.
| No. | 1 | 2 | 3 | |||
|---|---|---|---|---|---|---|
| δC | δH | δC | δH | δC | δH | |
| 1α | 33.7 | 1.23 (m) | 34.1 | 1.27 (m) | 35.1 | 1.46 (m) |
| 1β | 1.54 (m) | 1.45 (d, J = 12.0, 5.6) | 1.82 (td, J = 12.9, 5.0) | |||
| 2α | 21.9 | 1.42 (s) | 21.9 | 1.37 (s) | 23.5 | 1.59 (m) |
| 2β | 1.52 (m) | 1.51 (d, J = 19.1, 6.7) | 1.72 (m) | |||
| 3α | 29.0 | 1.33 (m) | 29.0 | 1.29 (d, J = 12.7) | 30.4 | 1.41 (m) |
| 3β | 1.21 (m) | 1.25 (m) | 1.38 (m) | |||
| 4 | 32.5 | 1.35 (m) | 32.6 | 1.49 (m) | 34.3 | 1.45 (m) |
| 5 | 39.5 | 38.9 | 42.7 | |||
| 6α | 31.6 | 2.04 (d, J = 17.4) | 31.5 | 1.95 (d, J = 16.9) | 28.6 | 2.42 (d, J = 16.3) |
| 6β | 1.85 (d, J = 17.4) | 1.84 (d, J = 16.9) | 2.26 (d, J = 16.3) | |||
| 7 | 129.6 | 130.3 | 116.2 | |||
| 8 | 128.3 | 125.8 | 148.7 | |||
| 9α | 38.5 | 2.41 (d, J = 18.4) | 35.7 | 2.05 (d, J = 18.4) | 34.0 | 3.14 (d, J = 17.4) |
| 9β | 1.58 (d, J = 18.4) | 1.66 (d, J = 18.4) | 2.36 (d, J = 17.4) | |||
| 10 | 70.6 | 70.8 | 75.6 | |||
| 11 | 85.0 | 82.7 | 120.5 | |||
| 12 | 78.6 | 3.77 (d, J = 4.9) | 78.6 | 3.69 (d, J = 5.2) | 138.5 | 7.07 (s) |
| 13 | 14.6 | 1.30 (s) | 19.1 | 1.36 (s) | 8.1 | 1.91 (d, J = 1.3) |
| 14 | 14.6 | 0.79 (s) | 14.8 | 0.78 (s) | 15.4 | 0.99 (s) |
| 15 | 16.0 | 0.73 (d, J = 6.5) | 16.2 | 0.70 (d, J = 6.5) | 16.5 | 0.81(d, J = 6.2) |
| 16 | 40.6 | 2.08 (s) | 39.0 | 2.38 (s) | ||
| 17 | 48.1 | 44.9 | ||||
| 18 | 180.3 | 178.7 | ||||
| 19 | 16.4 | 1.10 (s) | 18.4 | 1.04 (s) | ||
| OH-10 | 4.04 (s) | 4.07 (s) | ||||
| OH-12 | 5.70 (d, J = 5.0) | 5.59 (d, J = 5.2) | ||||
a
The assignments were based on distortionless enhancement by polarization transfer (DEPT) and 2D NMR experiments.