http://zinc15.docking.org/patterns/home/

Search a compound for patterns. You can select only a specific subset of patterns (e.g. PAINS)                        to report.    

Finally,  the  OSIRIS®  property  explorer  tool  (www.organic-chemistry.org/prog/peo)
was used to predict drug-likeness, toxicity risk, mutagenicity, irritant, and tumorigenic
effects  of  the  selected  molecules.