Oxytocin, a natural protein hormone, has an important role in sexual reproduction, childbirth, mother-baby bonding during breastfeeding and wound healing. New research suggests it may improve cognitive performance, reduce cardiovascular risk and offset the effects of diabetes Sequence one letter code. CYIQNCPLG-NH2 (Disulfide bridge: 1-6) Sequence three letter code : H-Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2 (Disulfide bridge: 1-6) CAS registry number : 50-56-6 Molecular Formula : C43H66N12O12S2 Molecular Mass/ Weight : 1007.2