Table 1.
NMR spectroscopic data for compound 8 in CDCl3.
| NO | δH (J in Hz) | δC | HMBC |
|---|---|---|---|
| 1 | 1.80, m, α 3.32, m, β |
26.9, CH2 | C-2, C-3, C-10, C-20 |
| 2 | 2.71, m, α 2.73, m, β |
33.2, CH2 | C-1, C-3, C-4, C-10 |
| 3 | 214.0, qC | ||
| 4 | 48.8, qC | ||
| 5 | 140.3, qC | ||
| 6 | 142.4, qC | ||
| 7 | 183.6, qC | ||
| 8 | 109.5, qC | ||
| 9 | 139.3, qC | ||
| 10 | 40.6, qC | ||
| 11 | 132.9, qC | ||
| 12 | 152.6, qC | ||
| 13 | 118.7, qC | ||
| 14 | 155.2, qC | ||
| 15 | 2.91, dd (13.8, 4.0) a 2.83, dd (13.7, 8.3) a |
32.9, CH2 | C-12, C-13, C-14, C-16, C-17 |
| 16 | 4.18, m | 67.8, CH | C-15, C-17 |
| 17 | 1.28, d (6.2) | 23.8, CH3 | C-15, C-16 |
| 18 | 1.58, s | 21.0, CH3 | C-3, C-4, C-5, C-19 |
| 19 | 1.53, s | 24.3, CH3 | C-3, C-4, C-5, C-18 |
| 20 | 1.44, s | 20.0, CH3 | C-1, C-5, C-9, C-10 |
| 21-OCH3 | 3.87, s | 61.7,OCH3 | C-12 |
a Assignments may be reversed.