Indoles are a class of organic compounds that are characterized by a six-membered ring structure containing a nitrogen atom. They are commonly found in nature and play important roles in biological processes, such as acting as signaling molecules and neurotransmitters. Indoles have also been studied for their potential pharmaceutical applications, particularly in the development of drugs for various medical conditions such as cancer, inflammation, and psychiatric disorders. Additionally, indoles have been used in the synthesis of various chemical compounds and as building blocks for complex molecules in organic chemistry.