Table 1.
1H-NMR data forcompounds 1-3.
| No. | 1a δH (mult, J, Hz) | 1b δH (mult, J, Hz) | 2a δH (mult, J, Hz) | 3a δH (mult, J, Hz) |
|---|---|---|---|---|
| 1 | 7.35 (br s) | 7.37 (brs) | 7.04 (br s) | 7.09 (br s) |
| 4 | 5.95 (br s) | 6.23 (brs) | 5.91 (br s) | 5.90 (br s) |
| 5 | 5.37 ( br s ) | 5.34 (d. 1.2) | 5.37 (br s) | 5.34 (br s) |
| 8 | 3.37 (dd, 3.0, 10.0) | 3.31 (dd, 3.6, 10.2) | 2.92 (t, 10.0) | 3.30 (t, 10.0) |
| 9 | 1.28 (s) | 1.21 (s) | 1.31 (s) | 1.36 (s) |
| 10 | 5.94 (dd, 1.5, 15.5) | 6.14 (dd, 1.8 15.6) | 5.95 (dd, 1.5, 15.5) | 5.93 (dd, 1.5, 15.5) |
| 11 | 6.49 (dq, 7.0, 15.5) | 6.50 (dq, 7.2, 15.6) | 6.41 (dq, 7.0, 15.5) | 6.43 (dq, 7.0, 15.5) |
| 12 | 1.89 (dd, 1.0, 6.5) | 1.88 (dd, 1.8, 6.6) | 1.87 (dd, 1.0, 6.5) | 1.86 (dd, 1.0, 6.5) |
| 13α | 2.33(dd, 10.0, 18.0) | 2.39 (dd, 10.2, 17.4) | 1.96 (dd, 10.5, 13.0) | 1.93 (overlap) |
| 13β | 2.99 (dd, 3.0, 18.0) | 2.99 (dd, 3.6, 17.4 ) | 2.36 (dd, 10.5, 13.0) | 1.98 (overlap) |
| 15a | 2.22 (dt, 7.5, 18.0) | 2.32 (dt, 7.5, 18.0) | 1.58 (m) | 1.45 (m) |
| 15b | 2.34 (dt, 7.5, 18.0) | 2.39 (dt, 7.5, 18.0) | 1.84 (m) | 2.00 (overlap) |
| 16 | 1.49 (m) | 1.48 (m) | 1.29 (m) | 1.23 (m) |
| 17 | 1.24 (m) | 1.19 (m) | 1.29 (m) | 1.23 (m) |
| 18 | 1.18 (m) | 1.28 (m) | 1.29 (m) | 1.23 (m) |
| 19 | 0.84 (t, 7.5) | 0.84 (t, 7.8) | 0.87 (t, 7.5) | 0.82 (t, 7.5) |
| OH-7 | 4.17 (br s) | 4.17 (br s) | ||
| OCH3 | 3.16 (s) | 3.29 (s) |
a Data were recorded in CDCl3 at 500 MHz; b Data were recorded in CD3COCD3 at 600 MHz. The assignments were based on DEPT, 1H-1H COSY, HMQC and HMBC experiments.