upply Melanotan IAfamelanotidedeveloped at the University of Arizona is a synthetic analog of the naturally occurring melanocortin peptide hormone alpha-melanocyte stimulating hormone (?-MSH) that has been shown to induce skin pigmentation through melanogenesis and thereby subsequently reduce sun (UV) damage to UV exposed skin in preliminary studies and clinical trials.CAS number 75921-69-6 [Nle4, D-Phe7]?-MSHIts,amino acid sequence is Ac-Ser-Tyr-Ser-Nle-Glu-His-D-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2 or [Nle4, D-Phe7]-?-MSH.Molecular formula C78H111N21O19 Molar mass 1646.84524standard :10mg/vial 10vials/kit