structural alert

https://doi.org/10.1351/goldbook.12729
Chemical features present in a hit or lead molecule indicative of potential toxicity.
Note: Typically, such features include chemically reactive functionality and components known to metabolise to chemically reactive entities.
Examples: Anhydrides, aromatic amines, and epoxides.
Source:
PAC, 2013, 85, 1725. (Glossary of terms used in medicinal chemistry. Part II (IUPAC Recommendations 2013)) on page 1752 [Terms] [Paper]