Table 1.
1H- and 13C-NMR data for compounds 1–3 (in CDCl3, 600 MHz for 1H and 150 MHz for 13C, δ in ppm).
| No. | 1 | 2 | 3 | |||
|---|---|---|---|---|---|---|
| δC | δH (mult, J in Hz) | δC | δH (mult, J in Hz) | δC | δH (mult, J in Hz) | |
| 1 | 125.9, d | 6.77 (s) | 125.2, d | 6.76 (s) | 184.3, s | |
| 3 | 209.4, s | 209.9, s | 205.6, s | |||
| 4 | 46.2, s | 46.3, s | 43.2, s | |||
| 5 | 133.6, s | 131.0, s | 163.4, s | |||
| 6 | 141.0, s | 141.3, s | 98.7, d | 6.80 s | ||
| 7 | 184.6, s | 180.1, s | 164.6, s | |||
| 8 | 112.9, s | 130.7, s | 133.2, s | |||
| 9 | 128.5, s | 131.9, s | 128.8, s | |||
| 10 | 118.4, s | 156.3, s | 125.2, s | |||
| 11 | 155.6, d | 7.41 (d, 6.0) | 106.5, d | 7.25 (s) | 124.8, d | 9.05 (d, 8.4) |
| 12 | 136.7, d | 7.45 (d, 6.0) | 162.1, s | 133.1, d | 7.62 (d, 8.4) | |
| 13 | 131.5, s | 122.8, s | 137.9, s | |||
| 14 | 160.9, s | 129.8, s | 8.02 (s) | 122.4, d | 8.12 (s) | |
| 15 | 16.1, q | 2.35 (s) | 16.8, q | 2.33 (s) | 22.1, q | 2.56 (s) |
| 18 | 21.6, q | 1.44 (s) | 21.7, q | 1.44 (s) | 25.0, q | 1.50 (s) |
| 19 | 21.6, q | 1.44 (s) | 21.7, q | 1.44 (s) | 25.0, q | 1.50 (s) |
| -OMe | 56.0, q | 4.00 (s) | 56.6, q | 4.20 (s) | ||
| 6-OH; | 7.27 (s) | 7.01 (s) | ||||
| 14-OH | 12.08 (s) | |||||