Table 1.
1H- and 13C-NMR spectroscopic data of compounds 1 and 2 (1 and 2 at 600 MHz, CDCl3, chemical shift values are in ppm relative to TMS; multiplicity and J values (in Hz) are presented in parentheses.
| No. | 1 | 2 | ||
|---|---|---|---|---|
| δH | δC | δH | δC | |
| 1 | 176.6 | 179.4 | ||
| 3α | 4.44 (t, 8.6) | 70.1 | ||
| 3β | 5.69 (d, 11.5) | 100.6 | 3.85 (dd, 8.9, 10.9) | 77.1 |
| 3a | 78.7 | 2.78 (m) | 44.6 | |
| 4 | 5.53 (dd, 10.2, 2.8) | 124.2 | 5.62 (dd, 12.8, 2.5) | 122.2 |
| 5 | 5.79 (d, 9.9) | 137.8 | 5.65 (d, 12.8) | 133.0 |
| 5a | 2.03 (m) | 36.3 | 1.97 (m) | 35.4 |
| 6α | 0.84 (q, 12.4) | 41.0 | 1.00 (m) | 39.0 |
| 6β | 1.90 (m) | 41.0 | 1.94 (m) | 39.0 |
| 7 | 1.50 (m) | 32.7 | 1.68 (m) | 37.4 |
| 8α | 0.91 (m) | 34.6 | ||
| 8β | 1.82 (m) | 34.6 | 4.54 (dt, 4.4, 10.8) | 77.1 |
| 9α | 1.34 (dd, 12.4, 3.1) | 25.6 | 1.38 (q, 12.2) | 31.1 |
| 9β | 1.79 (m) | 25.6 | 2.10 (m) | 31.1 |
| 9a | 1.49 (m) | 44.1 | 1.50 (m) | 37.3 |
| 9b | 51.5 | 42.8 | ||
| 1′ | 0.93 (d, 6.6) | 22.2 | 0.94 (d, 6.5) | 18.0 |
| 1″ | 1.18 (s) | 9.5 | 1.16 (s) | 16.1 |
| 8a | 170.5 | |||
| 8b | 2.06 (s) | 21.1 | ||