Compounds can contain unwanted substructures that may cause mutagenic, reactive, or other unfavorable pharmacokinetic effects or that may lead to non-specific interactions with assays (PAINS). Knowledge on unwanted substructures in a dataset can be integrated in cheminformatics pipelines to either perform an additional filtering step before screening or - more often - to set alert flags to compounds being potentially problematic (for manual inspection by medicinal chemists). This workflow shows how to filter for such unwanted substructures.
This is a companion discussion topic for the original entry at https://kni.me/w/b7EQeXcyeXFYGc0E