| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Pyrimidines | 100 | + | |
| 2 | Azoles | 80 | + | |
| 3 | Azirines | 29 | + | |
| 4 | Pyridines | 29 | + | |
| 5 | Piperidines | 8 | + | |
| 6 | Triazines | 6 | + | |
| 7 | Piperazines | 4 | + | |
| 8 | Oxazines | 4 | + | |
| 9 | Dioxoles | 3 | + | |
| 10 | Pyrrolidines | 3 | + | |
| 11 | Pyrans | 3 | + | |
| 12 | Furans | 2 | + | |
| 13 | Thiazines | 2 | + | |
| 14 | Pyrazines | 1 | + | |
| 15 | Pyridazines | 1 | + |