Table 1.
13C NMR and 1H NMR Spectroscopic Data for Compounds 1–3.
| Position | Leonurenone A (1)a
|
Leonurenone B (2)b
|
Leonurenone C (3)a
|
|||
|---|---|---|---|---|---|---|
| δC | δH | δC | δH | δC | δH | |
| 1 | 29.4 | 1.92 (m) 2.18 (m) |
30.4 | 1.62 (m) 1.73 (m) |
30.7 | 1.66 (m) |
| 2 | 17.9 | 1.72 (m) 1.85 (m) |
17.2 | 1.72 (m) 1.93 (m) |
17.4 | 1.74 (m) 1.87 (m) |
| 3 | 39.2 | 1.44 (m) 1.60 (m) |
38.8 | 1.47 (m) 1.61 (m) |
39.3 | 1.58 (m) |
| 4 | 37.1 | 36.6 | 37.1 | |||
| 5 | 172.4 | 174.6 | 172.0 | |||
| 6 | 123.1 | 6.06 (s) | 122.3 | 6.00 (s) | 123.2 | 6.05 (s) |
| 7 | 200.0 | 201.1 | 199.8 | |||
| 8 | 47.7 | 3.01 (q, 6.8) | 47.1 | 3.05 (q, 6.8) | 47.7 | 2.98 (q, 6.9) |
| 9 | 95.9 | 96.5 | 95.7 | |||
| 10 | 45.2 | 44.9 | 45.0 | |||
| 11 | 30.8 | 1.67 (m) 1.71 (m) |
29.3 | 2.10 (m) 2.40 (m) |
29.7 | 1.91 (m) 2.18 (m) |
| 12 | 35.4 | 1.87 (m) 1.88 (m) |
36.0 | 2.21 (m) | 34.3 | 1.78 (m) 1.91 (m) |
| 13 | 85.7 | 86.6 | 85.2 | |||
| 14 | 40.8 | 1.94 (m) | 40.9 | 2.63 (d, 17.2) 2.80 (d, 17.2) |
35.7 | 1.93 (m) 2.15 (m) |
| 15 | 59.2 | 3.70 (m) 3.74 (m) |
175.8 | 61.5 | 4.06 (m) 4.16 (m) |
|
| 16 | 66.9 | 3.50 (d, 11.2) 3.56 (d, 11.2) |
77.9 | 4.23 (d, 9.0) 4.30 (d, 9.0) |
65.4 | 3.40 (d, 11.3) 3.52 (d, 11.3) |
| 17 | 9.9 | 1.21 (d, 6.8) | 8.6 | 1.17 (d, 7.8) | 9.9 | 1.24 (d, 6.8) |
| 18 | 31.7 | 1.20 (s) | 30.6 | 1.19 (s) | 31.7 | 1.20 (s) |
| 19 | 30.6 | 1.21 (s) | 29.8 | 1.26 (s) | 30.6 | 1.21(s) |
| 20 | 24.0 | 1.38 (s) | 23.0 | 1.43 (s) | 24.1 | 1.38 (s) |
| CH3COO | 21.0 | 2.05 (s) | ||||
| CH3COO | 171.1 | |||||
a
Measured in CDCl3.
b
Measured in CD3OD.