Table 2. 1H and 13C NMR Data of Truncatenoneab.
| no. | δCc | δH (J in Hz) | HMBC |
|---|---|---|---|
| 1 | 14.8 q | 1.89 (3H) d (6.8) | H-2 |
| 2 | 138.3 d | 6.79 (1H) q (6.8) | H3C-1, H3C-9 |
| 3 | 138.2 s | H3C-1, H3C-9 | |
| 4 | 207.2 s | H-2, H-5, H-6, H3C-9, H3C-10 | |
| 5 | 43.1 d | 3.30 (1H) quint (7.2) | H2C-7, H3C-10 |
| 6 | 75.6 d | 3.63 (1H) m | H-5, H2C-7, H3C-8, H3C-10 |
| 7 | 27.9 t | 1.50 (1H) m | H3C-8 |
| 1.43 (1H) m | |||
| 8 | 10.1 q | 0.97 (3H) t (7.4) | H-6, H2C-7 |
| 9 | 10.8 q | 1.78 (3H) s | H-2 |
| 10 | 16.0 q | 1.15 (3H) d (7.2) | H-5 |
a
2D 1H, 1H (COSY), and 13C, 1H (HSQC) NMR experiments confirmed the correlations of all of the protons and the corresponding carbons.
b
Coupling constants (J) are given in parentheses.
c
Multiplicities were assigned to the DEPT spectrum.