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Oxytocin: molecular data, studies & sources

Oxytocin is catalogued here as a research compound. This profile brings together the molecular source record, selected indexed publications and available supplier comparisons. Evidence for a named substance does not authenticate a commercial product.

Compiled by PeptideTech Editors · Sources checked · Selected bibliography, not a systematic review

Molecular formula, weight & structure

Molecular formula (MF)
C43H66N12O12S2
Molecular weight (MW)
1007.2 g/mol
PubChem compound ID
439302
Record title
Oxytocin

Values describe the selected PubChem molecular entity. Counterions, salt forms, hydration and sequence changes can alter the supplied material. Confirm the exact identity against the supplier specification.

Source: PubChem CID 439302 · retrieved 2026-09-21

PubChem 2D molecular structure for Oxytocin, CID 439302
2D depiction from PubChem. Open to inspect the full image. This drawing represents the selected record, not a vendor batch test.
Chemical identifiers and source data
IUPAC name
(2S)-1-[(4R,7S,10S,13S,16S,19R)-19-amino-7-(2-amino-2-oxoethyl)-10-(3-amino-3-oxopropyl)-13-[(2S)-butan-2-yl]-16-[(4-hydroxyphenyl)methyl]-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]-N-[(2S)-1-[(2-amino-2-oxoethyl)amino]-4-methyl-1-oxopentan-2-yl]pyrrolidine-2-carboxamide
InChIKey
XNOPRXBHLZRZKH-DSZYJQQASA-N
SMILES
CC[C@H](C)[C@H]1C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CSSC[C@@H](C(=O)N[C@H](C(=O)N1)CC2=CC=C(C=C2)O)N)C(=O)N3CCC[C@H]3C(=O)N[C@@H](CC(C)C)C(=O)NCC(=O)N)CC(=O)N)CCC(=O)N
Machine-readable PubChem source

Human and clinical studies

Selected human-study records are shown with their indexed or reviewed study type. Check the original article for the intervention, formulation and controls; the molecule can also be a comparator or measured variable.

  1. Human study · PubMed trial index

    Oxytocin promotes altruistic punishment.

    Aydogan G, Furtner NC, Kern B et al. · Social cognitive and affective neuroscience · 2017

    PMID 28981891 · DOI: 10.1093/scan/nsx101

  2. Human study · PubMed trial index

    Social support and oxytocin interact to suppress cortisol and subjective responses to psychosocial stress.

    Heinrichs M, Baumgartner T, Kirschbaum C et al. · Biological psychiatry · 2003

    PMID 14675803 · DOI: 10.1016/s0006-3223(03)00465-7

  3. Human study · PubMed trial index

    Impact of discontinuing oxytocin in active labour on neonatal morbidity: an open-label, multicentre, randomised trial.

    Girault A, Sentilhes L, Desbrière R et al. · Lancet (London, England) · 2023

    PMID 37952548 · DOI: 10.1016/S0140-6736(23)01803-2

  4. Human study · PubMed trial index

    Oxytocin modulates hemodynamic responses to monetary incentives in humans.

    Mickey BJ, Heffernan J, Heisel C et al. · Psychopharmacology · 2016

    PMID 27614896 · DOI: 10.1007/s00213-016-4423-6

  5. Human study · PubMed trial index

    Enhancing oxytocin and prolactin levels to address oligogalactia through emotional management and massage in working mothers.

    Astuti D, Rahfiludin MZ, Dwidiyanti M et al. · Narra J · 2024

    PMID 39816069 · DOI: 10.52225/narra.v4i3.017

Preclinical research, reviews & other publications

Animal studies, laboratory experiments, reviews and other indexed papers answer different questions. A review is secondary evidence; a case report does not estimate how often an outcome occurs.

  1. Review · secondary evidence

    The physiology and pharmacology of oxytocin in labor and in the peripartum period.

    Uvnäs-Moberg K · American journal of obstetrics and gynecology · 2024

    PMID 38462255 · DOI: 10.1016/j.ajog.2023.04.011

  2. Review · secondary evidence

    Is Oxytocin "Nature's Medicine"?

    Carter CS, Kenkel WM, MacLean EL et al. · Pharmacological reviews · 2020

    PMID 32912963 · DOI: 10.1124/pr.120.019398

  3. Review · secondary evidence

    Maternal plasma levels of oxytocin during breastfeeding-A systematic review.

    Uvnäs Moberg K, Ekström-Bergström A, Buckley S et al. · PloS one · 2020

    PMID 32756565 · DOI: 10.1371/journal.pone.0235806

Oxytocin supplier sources

Scientific sources describe molecules and experiments. The commercial links below identify recorded supplier packages. A publication or chemical database entry does not verify the seller, purity, sterility or contents of a lot. Some links are affiliate links; see our disclosure.

Compare all Oxytocin sizes, forms and supplier prices →

SupplierRecorded packagesExample source listing
Blank PeptidesUSD5mg Vial1 recorded offers5mg Vial · $60.00Checked Sep 21, 2026Supplier listing
Amino USAUSD5mg Vial1 recorded offers5mg Vial · $31.50Checked Sep 16, 2026Supplier listing
Cenexa LabsUSD2mg Vial · 10mg Vial · 4mg Nasal spray3 recorded offers2mg Vial · $38.99Checked Sep 16, 2026Supplier listing
Direct PeptidesUSD5mg Vial1 recorded offers5mg Vial · $69.00Checked Sep 16, 2026Supplier listing
US Peptide LabsUSD10mg Nasal spray · 10mg Oral spray2 recorded offers10mg Nasal spray · $110.00Checked Sep 16, 2026Supplier listing

Reference sources & further reading

The citations above link directly to publication records. Encyclopedia links are background reading and are not used to establish clinical effectiveness.

Search for additional research

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Research information is not a dosing guide or a recommendation for personal use. Study findings are specific to the formulation, population and methods tested. Read our source and correction policy.

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