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| nuclei | 2a | 2b (4-NO2) | 2c (5-NO2) | 2d (6-NO2) |
|---|---|---|---|---|
| C3 | 133.5 | 134.3 | 136.7 | 135.3 |
| C3a | 126.0 | 120.2 | 123.3 | 125.9 |
| C4 | 119.4 | 138.8 | 118.9 | 124.0 |
| 121.2 | ||||
| C5 | 121.3 | 118.9 | 141.7 | 114.4 |
| C6 | 123.0 | 126.3 | 121.2 | 145.6 |
| 123.3 | ||||
| C7 | 109.0 | 115.3 | 109.2 | 103.8 |
| 109.7 | ||||
| C7a | 139.4 | 140.5 | 141.7 | 137.3 |
| CH2 | 69.3 | 70.7 | 70.1 | 69.8 |
| N1 | –173.4 | –171.7 | –172.9 | –173.4 |
| N2 | –68.2 | –66.6 | –63.3 | –65.4 |
| NO2 | –6.4 | –5.9 | –6.6 |
