Table 1.
NMR spectral assignments for compound 1
| Carbon number | δ C | δ H , J (Hz) | HMBC | COSY |
|---|---|---|---|---|
| C-1 (CH2) | 47.9 | 1.05 (2H, t, 11.5, 23.0) | ||
| C-2 (CHOH) | 65.5 | 3.97 (1H, m) | ||
| C-3 (CH2) | 44.6 | 1.41 (2H, d, 11.5) | ||
| C-4 (C) | 39.4 | |||
| C-5 (CH) | 47.5 | 1.47 (1H, dd, 2.5, 12.5) | ||
| C-6 (CH2) | 23.5 | 1.63 (2H, m) | ||
| C-7 (CH2) | 37.5 | 2.03 (2H, m) | ||
| C-8 (C) | 147.4 | |||
| C-9 (CH) | 56.8 | 1.88 (1H, d, 10.5) | ||
| C-10 (C) | 40.7 | |||
| C-11 (CH2) | 23.2 | 2.38 (1H, m) | H-11b | |
| 2.37 (1H, m) | H-11a | |||
| C-12 (CH) | 133.4 | 5.40 (1H, t, 6.0, 12.5) | C-9, C-11, C-14, C-16 | |
| C-13 (C) | 133.6 | |||
| C-14 (CH) | 141.5 | 6.32 (1H, dd, 10.5, 17.5) | C-13, C-16 | |
| C-15 (CH2) | 110.0 | 5.05 (1H, d, 17.5) | C-13, C-14 | H-14 |
| 4.88 (1H, d, 11.0) | H-14 | |||
| C-16 (CH3) | 11.8 | 1.75 (3H, s) | ||
| C-17 (CH2) | 108.5 | 4.86 (1H, d, 1.5) | C-7, C-9 | H-17b |
| 4.49 (1H, d, 1.0) | H-17a | |||
| C-18 (CH2OH) | 71.5 | 3.42 (1H, d, 11.0) | C-3, C-4, C-5, C-19, | H-18b |
| 3.18 (1H, d, 11.0) | H-18a | |||
| C-19 (CH3) | 18.5 | 0.80 (3H, s) | ||
| C-20 (CH3) | 15.8 | 0.81 (3H, s) |