| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Purines | 100 | + | |
| 2 | Indoles | 94 | + | |
| 3 | Isoquinolines | 32 | + | |
| 4 | Benzopyrans | 27 | + | |
| 5 | Quinoxalines | 23 | + | |
| 6 | Quinolines | 20 | + | |
| 7 | Benzothiazoles | 17 | + | |
| 8 | Pteridines | 17 | + | |
| 9 | Quinazolines | 15 | + | |
| 10 | Benzofurans | 6 | + | |
| 11 | Benzazepines | 5 | + | |
| 12 | Isoindoles | 5 | + | |
| 13 | Benzoxazines | 4 | + | |
| 14 | Benzimidazoles | 3 | + | |
| 15 | Indazoles | 3 | + | |
| 16 | Benzothiadiazines | 3 | + | |
| 17 | Bicyclo Compounds, Heterocyclic | 1 | + |