← Peptide Index

Melatonin

Melatonin is a research reference compound and is not a peptide. Structural class: Indoleamine (N-acetyl-5-methoxytryptamine). Reported molecular weight: 232.28 Da. Listed for research and educational reference only.

Also known asN-Acetyl-5-methoxytryptamine, Pineal Indoleamine
Evidence levelExtensively Studied
Regulatory statusResearch-only
Molecular weight232.28 Da
Chain lengthSmall molecule (not a peptide)
ClassIndoleamine (N-acetyl-5-methoxytryptamine)
SequenceC13H16N2O2 (molecular formula, not a peptide sequence)
NotesIndoleamine derived from tryptophan by way of serotonin, CAS 73-31-4
Updated2026-07-31

For research and educational reference only.