| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Purines | 100 | + | |
| 2 | Benzopyrans | 88 | + | |
| 3 | Indoles | 33 | + | |
| 4 | Quinolines | 25 | + | |
| 5 | Bicyclo Compounds, Heterocyclic | 18 | + | |
| 6 | Pteridines | 12 | + | |
| 7 | Isoquinolines | 11 | + | |
| 8 | Benzazepines | 10 | + | |
| 9 | Quinazolines | 9 | + | |
| 10 | Quinoxalines | 7 | + | |
| 11 | Benzimidazoles | 5 | + | |
| 12 | Benzothiazoles | 4 | + | |
| 13 | Benzothiadiazines | 3 | + | |
| 14 | Indazoles | 3 | + | |
| 15 | Quinolizines | 2 | + | |
| 16 | Benzofurans | 2 | + | |
| 17 | Benzoxazoles | 1 | + | |
| 18 | Isoindoles | 1 | + | |
| 19 | Pyrrolizidine Alkaloids | 1 | + | |
| 20 | Benzoxazines | 1 | + |