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Summary of reasons for removal of compounds from ChEMBL21 [88].
| Removal Reason | Number of removals |
|---|---|
| HAC outside range 8-45 | 87849 |
| Non-neutral | 30725 |
| No Rings Present | 18211 |
| N+O count < 2 | 15892 |
| Missing SMILES String | 8294 |
| Gross charge > 4 | 970 |
| Carbon count < 2 | 7 |
| Broken bond during de-salting | 0 |
