PT-141, also named Bremelanotide, CAS No.189691-06-3, is a synthetic cyclic heptapeptide. Its amino acid sequence: Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH, molecular weight 1025.18 Da. The product is white lyophilized powder, HPLC tested purity ≥99%. COA and HPLC chromatogram are available per batch.

It is an analog of α-MSH, acting as melanocortin receptor agonist targeting MC3R and MC4R. Widely applied for laboratory research of melanocortin receptor signaling, central nervous system pharmacology and related behavioral studies.