Table 3.
13C NMR data of pyridoacridine alkaloids 17–19.
| (150 MHz, CD3OD) [51] | (125 MHz, CD3CN) [51] | (125 MHz, CDCl3/TFA-d) [52] | |
| Position | 17 | 18 | 19 |
| 1 | 135.8 | 143.0 | 126.9 |
| 2 | 124.3 | 128.4 | 117.9 |
| 3 | 162.7 | 133.5 | 138.1 |
| 4 | 108.0 | 125.1 | 133.7 |
| 4a | 126.6 | 125.2 | 114.4 |
| 4b | 140.9 | 115.8 | 122.0 |
| 5 | 122.9 | 187.2 | 122.7 |
| 6 | 151.4 | 71.4 | 146.0 |
| 7a | 149.5 | 115.1 | 126.2 |
| 8 | 180.6 | 161.0 | 174.7 |
| 8a | 130.8 | 132.7 | 113.4 |
| 9 | 147.9 | 145.9 | 145.7 |
| 11 | 148.7 | 142.0 | 164.2 |
| 12 | 124.1 | 122.9 | 115.6 |
| 12a | 149.2 | 143.5 | 142.8 |
| 12b | 145.5 | 139.5 | 142.8 |
| 12c | 120.8 | 129.9 | 111.1 |
| 13a | 141.5 | 143.1 | 144.9 |
| MeN-10 | 49.3 | 49.0 | 39.7 |
| MeN-7 | – | 54.1 | – |
| MeN-7 | – | 54.1 | – |