Table 1.
13C-NMR (150 MHz), 1H-NMR (600 MHz) and HMBC spectral data of litsericinone, (2) in CDCl3 (δ in ppm, J in Hz).
| Position | 13C (δ, CDCl3) | Type | 1H (J, Hz) | HMBC (2J, 3J) |
|---|---|---|---|---|
| 1 | 148.9 | Cq | - | |
| 1a | 141.1 | Cq | - | |
| 1b | 123.9 | Cq | - | |
| 2 | 141.1 | Cq | - | |
| 3 | 106.9 | CH | 6.51 s | C1, C1a, C2, C4 |
| 3a | 126.7 | Cq | - | |
| 4 | 25.1 | CH2 | 2.87 m (ax) | C3, C1b, C1a |
| 2.75 m (eq) | C3, C1b, C1a | |||
| 5 | 43.9 | CH2 | 3.55 m (ax) | C4, C6a, C1b |
| 3.16 m (eq) | C4, C6a | |||
| 6a | 56.8 | CH | 4.26 dd | C5, C7 |
| (J = 6.9 Hz, | ||||
| J = 9.8 Hz) | ||||
| 7 | 44.1 | CH2 | 2.73 m (ax) | C3, C3a, C1a |
| 1.87 m (eq) | C12, C7a, C6a | |||
| 7a | 46.2 | Cq | - | - |
| 8 | 38.5 | CH2 | 2.68 m (ax) | C10 |
| 2.41 m (eq) | C9, C7a, C10 | |||
| 9 | 36.2 | CH2 | 2.50 m (ax) | C8, C7a, C10 |
| 1.91 m (eq) | C11, C7a, C10 | |||
| 10 | 211.1 | C=O | - | - |
| 11 | 38.9 | CH2 | 2.46 m (ax) | C10 |
| 2.45 m (eq) | C12, C7a, C10 | |||
| 12 | 34.3 | CH2 | 2.10 m (ax) | C9, C7, C7a, C3a, C10 |
| 2.00 m (eq) | C9, C7a, C3a, C10 | |||
| Methylenedioxy (O-CH2-O) |
100.9 | CH2 | 5.89 d (J = 1.3 Hz) | C1,C2 |
| 5.86 d (J = 1.3 Hz) | C1,C2 |