Table 1.
13C NMR data of pyridoacridine alkaloids 1–8.
| (125 MHz, CDCl3) [42] | (125 MHz, CD3OD) [44] | (125 MHz, DMSO-d6) [45] | (125 MHz, DMSO-d6) [46] | |||||
| Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1 | 131.9 | 132.7 | 117.9 | 117.6 | 117.9 | 117.6 | 116.6 | 116.7 |
| 2 | 131.9 | 133.3 | 134.8 | 135.0 | 132.6 | 134.7 | 133.2 | 133.8 |
| 3 | 129.8 | 131.4 | 122.6 | 122.0 | 123.0 | 122.4 | 124.7 | 125.0 |
| 4 | 122.8 | 124.9 | 125.4 | 125.4 | 124.4 | 125.2 | 127.0 | 127.3 |
| 4a | 121.8 | 123.1 | 113.9 | 113.9 | 116.7 | 113.8 | 119.0 | 118.7 |
| 4b | 136.9 | 139.1 | 149.1 | 149.2 | 140.9 | 148.9 | nd | 138.6 |
| 5 | 119.0 | 122.0 | 105.5 | 104.9 | 109.3 | 105.1 | 110.6 | 110.6 |
| 6 | 149.8 | 150.9 | 143.6 | 143.3 | 151.6 | 143.3 | 141.6 | 140.5 |
| 7a | 146.5 | 147.7 | 127.0 | 125.9 | 142.8 | 126.7 | 130.0 | nd |
| 8 | 183.3 | 181.1 | 137.3 | 136.6 | 139.0 | 137.2 | 143.9 | 142.9 |
| 9 | 132.8 | 144.7 | 117.4 | 121.6 | 113.6 | 121.8 | 109.5 | 110.2 |
| 10 | 152.2 | 150.2 | 118.3 | 116.2 | 108.4 | 113.8 | 117.5 | 117.1 |
| 10a | 150.3 | 150.7 | 126.6 | 128.3 | 134.6 | 128.3 | 113.1 | 118.0 |
| 10b | 117.8 | 118.8 | 120.3 | 120.3 | 117.9 | 120.4 | 116.4 | 113.0 |
| 11a | 145.3 | 147.1 | 140.9 | 141.0 | 137.1 | 141.0 | 136.0 | 136.0 |
| 12 | 31.7 | 29.1 | 64.3 | 30.3 | 191.8 | 28.2 | 106.2 | 106.3 |
| 13 | 39.3 | 40.2 | 44.0 | 37.7 | – | 37.9 | 131.4 | 131.4 |
| acetyl | trifluoroacetyl | – | – |  |
 |
|||
| C=O | 170.4 | – | – | 171.4 | – | – | 169.5 | 169.6 |
| – | 23.3 CH3 | 17.9 SCH3 | – | 22.4 CF3 | – | – | 131.2 C | 117.6 CH |
| – | – | – | – | – | – | – | 133.0 CH | 154.5 C |
| – | – | – | – | – | – | – | 14.0 CH3 | 27.4 CH3 |
| – | – | – | – | – | – | – | 12.3 CH3 | 19.8 CH3 |