Table 1.
1H NMR spectroscopic data (400 MHz, CD3OD) for 1–3.
| H | 1 | 2 | 3 |
|---|---|---|---|
| 1α | 1.96 (dd, 13.0, 4.8) | 2.00 (m) | 1.98 (m) |
| 1β | 2.40 (m) | 2.46 (br d, 13.0) | 2.46 (br d, 14.0) |
| 2 | 4.25 (br s) | 4.28 (br s) | 4.28 (br s) |
| 3 | 3.91 (t, 2.4) | 3.98 (t, 2.8) | 3.97 (t, 3.2) |
| 4 | 3.98 (br d, 2.4) | 4.04 (br d, 2.8) | 4.03 (br d, 3.2) |
| 5 | 1.41 (dd, 10.8, 2.0) | 1.46 (dd, 10.8, 2.0) | 1.45 (dd, 10.8, 2.0) |
| 6 | 4.11 (td, 10.8, 4.4) | 4.16 (td, 10.8, 4.4) | 4.15 (td, 10.8, 4.4) |
| 7α | 1.51 (m) | 1.53 (m) | 1.53 (m) |
| 7β | 1.91 (m) | 1.91 (m) | 1.91 (m) |
| 8 | 1.95 (m) | 1.95 (m) | 1.95 (m) |
| 11 | 5.32 (d, 5.2) | 5.36 (d, 5.2) | 5.36 (br d, 5.2) |
| 12α | 2.12 (d, 17.5) | 2.15 (br d, 17.5) | 2.15 (br d, 17.5) |
| 12β | 1.93 (m) | 1.93 (m) | 1.93 (m) |
| 15a | 1.38 (m) | 1.38 (m) | 1.38 (m) |
| 15b | 1.44 (m) | 1.44 (m) | 1.44 (m) |
| 16a | 1.37 (m) | 1.37 (m) | 1.37 (m) |
| 16b | 1.92 (m) | 1.92 (m) | 1.92 (m) |
| 17 | 1.66 (q, 9.4) | 1.69 (q, 9.4) | 1.68 (q, 9.4) |
| 18 | 0.70 (s) | 0.73 (s) | 0.73 (s) |
| 19 | 1.34 (s) | 1.38 (s) | 1.38 (s) |
| 20 | 1.42 (m) | 1.42 (m) | 1.42 (m) |
| 21 | 0.91 (d, 6.4) | 0.95 (d, 6.4) | 0.95 (d, 6.4) |
| 22a | 1.06 (m) | 1.11 (m) | 1.11 (m) |
| 22b | 1.43 (m) | 1.48 (m) | 1.48 (m) |
| 23a | 1.42 (m) | 1.47 (m) | 1.47 (m) |
| 23b | 1.54 (m) | 1.55 (m) | 1.55 (m) |
| 24 | 2.42 (m) | 2.52 (q, 6.4) | 2.53 (q, 6.4) |
| 27 | 5.86 (s) | 7.32 (br s) | 6.93 (br s) |
| 28 | 4.87 (br s) | 5.87 (br s) | |
| 29 | 1.12 (d, 6.8) | 1.21 (d, 6.8) | 1.20 (d, 6.8) |
| 30 | 0.82 (s) | 0.85 (s) | 0.85 (s) |
| 26-OCH3 | 3.70 (s) | ||
| 28-OCH3 | 3.66 (s) | 3.58 (s) |