Substituted benzothiophene
The substituted benzothiophenes are a class of chemical compounds based on benzothiophene. They are closely related to the substituted benzofurans, substituted tryptamines, and to other chemical groups such as the substituted benzodioxoles (or methylenedioxyphenyl compounds).
Source: Wikipedia — Substituted benzothiophene (CC BY-SA 4.0)