Bisindolylmaleimide is an organic compound that forms the core chemical structure of a variety of biologically active compounds. This core structure includes a central maleimide group with two indole groups attached. Bisindolylmaleimide is an organic compound that forms the core chemical structure of a variety of biologically active compounds. This core structure includes a central maleimide group with two indole groups attached. Examples of bisindolylmaleimide derivatives include: Media related to Bisindolylmaleimides at Wikimedia Commons