Psilocin is a tryptamine alkaloid that is N,N-dimethyltryptamine carrying an additional hydroxy substituent at position 4. A hallucinogenic alkaloid isolated in trace amounts from Psilocybe mushrooms (also known as Teonanacatl or "magic mushrooms"). It has a role as a hallucinogen, a serotonergic agonist, a fungal metabolite, a human xenobiotic metabolite and a drug metabolite. It is a tryptamine alkaloid, a tertiary amino compound, a member of hydroxyindoles and a member of phenols. It is functionally related to a N,N-dimethyltryptamine. It is a conjugate base of a psilocinium.