Pyridopyrroloquinoxaline
A substituted pyridopyrroloquinoxaline, or more specifically a substituted octahydro-1H-pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxaline, also known as a substituted heterocycle fused γ-carboline, is a further-cyclized and substituted tetracyclic derivative of the tricyclic alkaloid γ-carboline as well as an analogue of the atypical antipsychotic lumateperone. They can additionally be thought of as analogues of cyclized tryptamines like the β-carbolines or harmala alkaloids such as harmaline, but are not technically tryptamines themselves.