7-Methoxytryptamine is an indole compound commonly present in various alkaloids, particularly the Aspidosperma class (e.g., aspidospermine, beninine, dichotamine, kopsingine, 12-methoxyvoaphylline, vobtusine). It is also found in alkaloids of other types, such as crenatidine, cuanzine, vincaricine, vinervinine, and others.