Substituted tryptamines
Substituted Tryptamines or Tryptamines are a class of chemicals that includes compounds with psychoactive effects.

Chemistry
Tryptamines are a chemical class based upon the molecule tryptamine. Tryptamine is made up of an indole ring attached to a monoamine chain. The chemical structure of a tryptamine-class molecule is the same as tryptamine, except some of the hydrogen atoms are substituted for a different functional groups.
Pharmacology
The tryptamine class of psychedelic drugs works via their action upon the 5-HT2A receptor.
Examples
Tryptamines are seen throughout organic chemistry and include neurotransmitters and psychoactive drugs.
Neurotransmitters/Hormones
Psychedelic Drugs