Table 3.
1H and 13C NMR data of cowabenzophenone A
| Cowabenzophenone A |
|||||
|---|---|---|---|---|---|
| Position | δH | δC | HMBC (1H13C) | ||
| 1 | - | 82.5 | - | ||
| 2 | - | 203.8 | - | ||
| 3 | - | 72.4 | - | ||
| 4a | 2.89 (t) | 34.0 | 2, 3, 5, 14, 22 | ||
| 4b | 2.07 (m) | 2, 3, 5, 14 | |||
| 5 | 3.03 (dd) | 56.0 | 6, 22, 23 | ||
| 6 | - | 44.6 | - | ||
| 7 | 2.20 (m) | 55.0 | 2, 14 | ||
| 8a | 2.07 (m) | 22.6 | 10, 13 | ||
| 8b | 1.76 (m) | 3, 6, 7, 10, 13 | |||
| 9 | 2.07 (m) | 42.7 | 1, 7, 11 | ||
| 10a | 2.51 (dd) | 35.1 | 8, 9, 11, 12, 27 | ||
| 10b | 2.20 (m) | 11, 12 | |||
| 11 | - | 67.9 | - | ||
| 12 | - | 204.5 | - | ||
| 13 | - | 47.5 | - | ||
| 14 | - | 205.0 | - | ||
| 15 | - | 193.2 | - | ||
| 16 | - | 135.2 | - | ||
| 17 | 7.07 (d) | 128.6 | 15, 19, 20 | ||
| 18 | 7.27 (t) | 128.5 | 16, 17 | ||
| 19 | 7.39 (t) | 132.4 | 17, 18 | ||
| 20 | 7.27 (t) | 128.5 | 16, 17 | ||
| 21 | 7.07 (d) | 128.6 | 15, 19, 20 | ||
| 22 | - | 144.5 | - | ||
| 23a | 4.90 (s) | 113.2 | 5, 24 | ||
| 23b | 4.77 (s) | ||||
| 24 | 1.77 (s) | 23.7 | 22, 23 | ||
| 25 | 0.87 (s) | 26.7 | 5, 6, 7, 26 | ||
| 26 | 1.01 (s) | 26.7 | 5, 6, 7, 25 | ||
| 27 | 2.62 (m) | 29.2 | 11, 12, 28, 29 | ||
| 28 | 5.29 (t) | 119.1 | 27, 30, 31 | ||
| 29 | - | 139.1 | - | ||
| 30 31 32 33 34 35 36 37 38 |
2.07 (m) 1.66 (s) 2.07 (m) 5.06 (m)- 1.66 (s) 1.59 (s) 1.39 (s) 1.41 (s) |
40.2 16.5 26.0 124.3 132.3 25.9 17.8 22.6 25.3 |
28,33 28, 29, 30 29, 30, 34 32, 36 – 33, 34 33, 34 1, 9, 13 1,9,13 |
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