Table 1 1 H- and 13 C-NMR for compound 68; CD 3 OD soln.; δ in ppm, J in Hz
From: Acetyl and butyryl cholinesterase inhibitory sesquiterpene lactones from Amberboa ramosa
Position | δ(H)a) | δ(C)b) | Multiplicity |
|---|---|---|---|
1 | 2.80 ddd (9.0, 8.5, 8.0) | 53.0 | CH |
2 | 2.35 dd (15.5, 5.0) | 34.0 | CH2 |
2.24 dd (9.0, 8.0) | |||
3 | 5.40 brd s | 126.8 | CH |
4 | - | 144.0 | C |
5 | 2.90 dd (9.0, 8.8) | 55.0 | CH |
6 | 4.25 dd (10.0, 8.3) | 82.3 | CH |
7 | 2.85 ddd (10.0, 9.5, 8.3) | 52.3 | CH |
8 | 5.07 ddd (8.3, 6.0, 5.5) | 75.4 | CH |
9 | 1.86 dd (12.3, 5.5) | 42.8 | CH2 |
2.38 dd (12.3, 6.0) | |||
10 | - | 81.1 | C |
11 | 2.50 dq (11.0, 5.8) | 42.1 | CH |
12 | - | 172.1 | C |
13 | 1.24 d (6.9) | 15.7 | CH3 |
14 | 1.27 s | 26.1 | CH3 |
15 | 1.79 s | 17.7 | CH3 |
16 | - | 181.0 | C |
17 | 2.05 s | 21.3 | CH3 |
18 | 3.63-3.65 m | 73.86 | CH |
19 | 3.59 d | 64.4 | CH2 |
3.56 d | |||
20 | 3.52 d | 64.4 | CH2 |
3.48 d |