Table 1.
NMR data and HMBC (heteronuclear multiple-bond correlation spectroscopy) correlations of compound 1 (CDCl3).
| Position | δC | δH (m, J in Hz) | HMBC (H→C) a |
|---|---|---|---|
| 1 | 39.7, CH2 | 1.66, 0.79 (m) | C-10 |
| 2 | 18.5, CH2 | 1.60, 1.44 (m) | C-4, C-10 |
| 3 | 41.9 CH2 | 1.37, 1.11 (m) | C-4 |
| 4 | 33.3 qC | - | - |
| 5 | 56.5 CH | 0.78 (m) | C-4 |
| 6 | 18.0 CH2 | 1.59, 1.39 (m) | |
| 7 | 41.4 CH2 | 1.78, 0.92 (m) | C-8 |
| 8 | 37.3 qC | - | - |
| 9 | 58.3 CH | 0.89 (m) | C-10, C-12 |
| 10 | 37.4 qC | - | - |
| 11 | 25.8 CH2 | 1.82, 1.55 (m) | C-10, C-12 |
| 12 | 73.8 CH | 3.82 (dd, 16.8, 6.6) | C-9, C-11, C-13, C-25, C-26 |
| 13 | 44.6 qC | - | - |
| 14 | 53.3 CH | 1.25 (m) | C-8, C-9, C-13, C-16, C-18 |
| 15 | 24.2 CH2 | 2.20, 1.63 (m) | C-8, C-13, C-14, C-16, C-17 |
| 16 | 65.9 CH | 5.67 (dd, 9.6, 7.2) | C-15, C-17, C-20 |
| 17 | 126.1 qC | - | - |
| 18 | 168.7 qC | - | - |
| 19 | 95.5 CH | 6.17 (s) | C-17, C-18 |
| 20 | 170.8 qC | - | - |
| 21 | 21.2 CH3 | 0.80 (s) | C-4 |
| 22 | 33.2 CH3 | 0.84 (s) | C-4 |
| 23 | 17.5 CH3 | 0.89 (s) | C-7, C-8, C-9, C-14 |
| 24 | 16.1 CH3 | 0.84 (s) | C-1, C-5, C-9, C-10 |
| 25 | 16.7 CH3 | 1.23 (s) | C-12, C-13, C-14, C-18 |
| 26 | 169.8 qC | - | - |
| 27 | 21.0 CH3 | 2.09 (s) | C-26 |
a: HMBC correlations are from proton(s) stated to the indicated carbons.